HomeMy WebLinkAboutIHNRConservationPlanUpdate
IRISH HILLS NATURAL RESERVE
CONSERVATION PLAN ~
WADDELL RANCH ADDITION
Public Hearing Review Draft
City of San Luis Obispo
City Administration
Office of Sustainability
Natural Resources Protection Program
October 2018
Irish Hils Natural Reserve Conservation Plan – Waddell Ranch Addition
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Irish Hills Natural Reserve Conservation Plan ~
Waddell Ranch Addition
Public Hearing Review Draft
Prepared by:
Robert Hill
Natural Resources Manager & Interim Deputy Director
(805) 781-7211
City of San Luis Obispo
City Administration
Office of Sustainability
Natural Resources Protection Program
990 Palm Street
San Luis Obispo, CA 93401
Technical Assistance:
Terra Verde Environmental Consulting
California Polytechnic State University, San Luis Obispo, Biological Sciences
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Table of Contents
PAGE
List of Figures & Tables 3
Executive Summary 4
1. History 9
2. Inventory 9
2.1 Physical Inventory 9
2.2 Legal Agreements 10
2.3 Soils 10
2.4 Species Inventory 10
2.5 Vegetation Communities 17
2.6 Natural Resources Protection 18
3. Goals and Policies 19
4. Conservation Plan 20
4.1 Naming 20
4.2 Land Use Designations 20
4.3 Photo-Monitoring Points 21
5. Wildfire Preparedness Plan 23
6. Implementation 23
7. Fiscal Statement 23
8. Updates and Amendment 24
Appendix
A. Photo Monitoring
B. Soils Report for Waddell Ranch
C. Results of a Botanical Inventory and Wildlife Surveys Completed at the Waddell Ranch
Property, Irish Hills Natural Reserve, City of San Luis Obispo, California (Terra Verde
Environmental, June 30, 2017)
D. Results of Focused Botanical Surveys for Irish Hills Spineflower (Chorizanthe aphanantha)
Completed in the Irish Hills Natural Reserve, City of San Luis Obispo, California (June 19,
2018)
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List of Figures & Tables
PAGE
FIGURES
Figure 1: Panoramic View of Waddell Ranch 4
Figure 2: Waddell Ranch Property Boundary Site Map 6
Figure 3: Waddell Ranch & Irish Hills Natural Reserve Property Boundary Site Map 7
Figure 4: Waddell Ranch, Irish Hills Natural Reserve & the City of San Luis Obispo Greenbelt 8
Figure 5: Map of Sensitive Resources 15
Figure 6: Map of Vegetation Communities 16
Figure 7: Waddell Ranch Management Areas & Combined Trail Map 22
TABLES
Table 1: Representative Special Status Species Observations at Waddell Ranch 10
Table 2: Photo Monitoring 25
Maps and Photos by City of San Luis Obispo staff and Terra Verde Environmental.
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Executive Summary
The Waddell Ranch Open Space is a hidden gem located in a secluded setting within the Irish Hills area
at the southern boundary of the City of San Luis Obispo and its Greenbelt. The upper extents of the
property feature spectacular 360 panoramic views of the City to the north and the Pacific Ocean to
the south, as well as the surrounding region. Waddell Ranch also hosts exceptional plant and wildlife
diversity, an interesting cultural resource legacy, and is well-suited to offer pleasant hiking, biking, and
passive recreational opportunities. The Waddell Ranch is contiguous with the existing Irish Hills Natural
Reserve and represents the capstone piece of a long-standing conservation vision to establish
permanent protection of the area’s outstanding natural resource values including a suite of rare plants,
artesian springs, and important wildlife habitat. The acquisition of Waddell Ranch allows for the
completion of a loop trail through the Irish Hills Natural Reserve along the top of Mine Hill where
outstanding views of the Pacific Ocean can be gained and enjoyed.
The Irish Hills Natural Reserve Conservation Plan – Waddell Ranch Addition (“the Plan”) is intended to
incorporate the Waddell Ranch into the existing Irish Hills Natural Reserve, all of which is owned by the
City of San Luis Obispo, in order to guide the conservation and stewardship of both properties together
as a single management unit. This process will also formally designate the Waddell Ranch as a City
Open Space property in accordance with the City’s Open Space Regulations (1996), the Conservation
Guidelines for Open Space Lands of the City of San Luis Obispo (2002), and the Conservation and Open
Space Element of the City’s General Plan (2006).
Site Description
Waddell Ranch offers a full host of natural landscape features and vegetative assemblages across a
site of 154 acres. The site is entirely underlain by serpentinite-derived soil and rock. In the early part of
the 20th century, exploration for chromite occurred in the surrounding area, giving the name “Mine Hill”
that shows on Unites States Geological Survey (USGS) topographic maps along the top of the ridgeline
that extends from the Waddell Ranch. At its lowest point the property is approximately 800 feet above
sea level, rising to a high point and summit of 1,235 feet. The site has historically been grazed, with a
central feature being an attractive stock watering pond that provides important habitat and also serves
as a wildlife watering source. Waddell Ranch features oak woodlands, riparian areas, and steep
chaparral hillsides in compliment to the grassland pasture and rock outcrop features of the site.
Figure 1: Panoramic Photo of Waddell Ranch viewed from the existing Irish Hills Natural Reserve
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Management Considerations
The Irish Hills Natural Reserve Conservation Plan – Waddell Ranch Addition provides a framework for
both properties to be managed together as a single unit, while primarily addressing property-specific
site stewardship at Waddell Ranch:
• Natural Resources Protection. The Plan places priority on maintaining the natural ecosystem,
while allowing passive public recreation as appropriate and compatible. The Waddell Ranch
provides habitat for four special status wildlife species and fifteen special status plant species,
including a newly discovered plant species, that shall be protected and monitored over the
long-term. Protective status is given to native plant communities and habitats that persist or are
establishing within the open space area for the functions and values that they provide.
• Scenic Resources. The upper ridgeline of the Waddell Ranch represents a scenic, if distant,
visible backdrop on the south side of the City of San Luis Obispo. The conservation and
protection of th property will ensure the integrity of this scenic resource.
• Cultural Resources. The Waddell Ranch contains two rock walls that were constructed in the first
half of the 20th century to create separate livestock pastures that may be of historic significance
under CEQA Guidelines §15064.5. The walls will be protected and maintained, and there are no
actions in the Plan that would change or alter this potential resource in any way. The Northern
Chumash also expressed interest in the land during the preparation of the Plan, and will have
the opportunity for ceremonial use.
• Erosion and Drainage. A Custom Soil Resource Report was prepared for Waddell Ranch using
the United States Department of Agriculture’s Natural Resources Conservation Service (NRCS)
website application. The report reveals that Waddell Ranch is comprised almost entirely of
serpentine soils known as the Obispo-Rock Outcrop Complex and identified as soil map unit no.
183. This soil is excessively well drained and characterized as having severe erosion potential,
especially given the 15-75% slopes. Accordingly, ongoing erosion control and water
management strategies are necessarily a part of the Plan.
• Fire Protection. Waddell Ranch is entirely surrounded by open land uses comprised of the
existing Irish Hills Natural Reserve and other larger ranch holdings. The Irish Hills landscape, in
general, represents a significant wildland fire hazard and there is no significant recorded fire
history in this system. A key component of the Plan is to address fire hazard that could result in
unacceptable safety risk and property loss. This is due to prevailing westerly winds; presence of
annual grassland, chaparral, oak woodland, and mixed ornamental trees and vegetation; and
the Waddell Ranch’s adjacency with the larger Irish Hills landscape.
• Trails and Passive Recreation. An existing system of old jeep trails provide access through the
Waddell Ranch. The Plan calls for maintenance of existing trails, as well as the addition of two
new trail segments; one will allow for access to the southerly areas of the property where
panoramic views of the Pacific Ocean can be enjoyed, while the other provides a return route
back to the existing Irish Hills Natural Reserve. A short section is also mapped to avoid the existing
in-stream crossing of Froom Creek during the wet season with the installation of a narrow,
fiberglass kit bridge that can be easily assembled and installed on site, while this trail will also
encourage use away from the neighboring property line. An existing trail traverses the upper
meadows area of Waddell Ranch. These meadows are considered sensitive and also remain
wet in the winter and early spring; two sections of raised wooden boardwalk are planned for
these sections. The Plan also presents the opportunity to bring forward two new trails in the
existing Irish Hills Natural Reserve. One is an extension of the Bog Thistle Trail that is designated for
hiking only, and would allow for hikers to gain a prominent lookout and the middle ridgeline
before joing the existing Durata Vista Trail. The other links the top of the Mine Trail with the Morro
View Trail creating a new loop in the upper, westerly portion of the Irish Hills Natural Reserve. A
brief linkage at the easterly edge of the Froom Ranch portion of the Irish Hills Natural Reserve to
the Mountainbrook property is also shown; this segment is a previously approved trail, but has yet
to be constructed. All new trails have been carefully considered and mapped to avoid sensitive
resources and special status plants and wildlife areas, as well as encourage use away from a
few existing trail areas that are proximate to sensitive areas.
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Figure 2: Waddell Ranch Property Boundary Site Map (2014 Aerial Photo)
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Figure 3: Waddell Ranch & Irish Hills Natural Reserve Property Boundary Site Map (USGS Topographic Basemap)
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Figure 4: Waddell Ranch and the Irish Hills Natural Reserve in the context of the San Luis Obispo Greenbelt
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1. History
Archaeological evidence suggests that Native American use of this region of the Central Coast began
during the late Pleistocene, as early as 9000 B.C., and deep shell middens dating from 7000–8500 B.C.
have been discovered in the San Luis Obispo area. The Waddell Ranch lies within the ethnographic
territory of the Chumash, in an area historically occupied by the Northern (Obispeño) Chumash
(Applied EarthWorks, 2015). Although proximate to several of the Mexican land grants distributed in the
early and mid-1840s, the immediate area later became part of the township and range system of
United States Government land patents following California’s statehood. By the 1870’s, the San Luis
Obispo County economy was dominated by dairies, primarily owned by Swiss and Swiss-Italian farmers
(Applied EarthWorks, 2015), but aside from limited cattle grazing these activities had limited impact on
brush-covered upland areas of the property.
The Irish Hills area also has a history of chromite exploration and mining. The 1895 U.S. Geological Survey
(USGS) map and subsequent USGS maps refer to the ridgeline extending to the east of Waddell Ranch
as Mine Hill. Chromite was mined in San Luis Obispo County intermittently from the 1870s until the 1940s,
although the Mine Hill area deposits do not appear to have been significant (Applied EarthWorks, 2015).
A small abandoned mine shaft located at one end of the westerly ridgeline was discovered during early
site visits by City staff.
In addition to livestock grazing and mining, other past known land uses on the Waddell property and
adjacent areas included dry farming and private recreational use. Aerial photographs from 1939, 1949,
and 1963 clearly depict dry farming cultivation of lowland areas (Rincon Consultants, 2016). Historical
aerial photographs also depict a series of jeep trails that, over the years, have narrowed to foot trails
along the top of the ridges at the upper extents of the property (Rincon Consultants, 2016). Mr. Duane
Waddell acquired the property in 1979 and reports past use of the property as a weekend family
retreat, while he had also leased the property to a tenant who grazed two horses on the property up
until the time of his sale to the City of San Luis Obispo in January 2017.
2. Inventory
2.1 Physical Inventory and Improvements
Waddell Ranch is held as a single assessor parcel, APN 076-051-011, and is comprised of three
underlying legal lots of record. It is 154 acres in size with an elevation ranging between 800 and 1,235
feet above mean sea level (msl). The primary entry and public access to the site is via existing trails
within the Irish Hills Natural Reserve, either the Oceanview Trail or the Froom Canyon Trail. City staff also
enjoys private access through a neighboring ranch property located off of Prefumo Canyon Road, for
emergency and maintenance purposes only, that leads to a locked gate on the westerly boundary of
the property. Bisecting the lower area of the property and the upper extent of the property are two
rock walls constructed for pasture separation. The project site contains an existing constructed stock
pond that contains cattail marsh and wetland habitat. There is one existing location on the project site
where there is an old “Arizona”-style crossing of Froom Creek that will be maintained; however, to avoid
impacts, the Plan allows for the possibility in the future of the installation of a pre-manufactured
lightweight fiberglass “kit” bridge to provide year-around access when Froom Creek is flowing so that it
can be avoided.
Other existing improvements include perimeter fencing, a gate at the Froom Canyon border with the
existing Irish Hills Natural Reserve, a windmill and water tank, and a developed spring and spring box.
Lastly, at the time of acquisition the Waddell Ranch included several structures at an old cabin site
(identified on Figure 2); these included a travel-trailer with an attached “lean-to” shed roof, a bunk
house, an outhouse, and a metal storage shed. These structures were all in very poor condition, and
were considered to be an immiment structural hazard and health hazard due to presence of asbestos
containing materials in two of the structures. These structures were demolished upon acquisition of the
property, although the rock-sided foundations and ancillary rock retaining walls remain. A small deck
and seating area has been installed over a remaining concrete slab in the location of the demolished
travel-trailer.
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2.2 Legal Agreements
There are no prior legal agreements (easements, rights of way, long-term leases, etc.) that staff is aware
of that affect the management and use of Waddell Ranch. The City has secured an ALTA Owner’s
Policy of Title Insurane from First American Title Insurance Company, policy no. 721068.
2.3 Soils
A Custom Soil Resource Report was prepared for Waddell Ranch using the United States Department of
Agriculture’s Natural Resources Conservation Service (NRCS) website application. The report reveals
that Waddell Ranch is comprised almost entirely (88%) of serpentine-derived soils known as the Obispo-
Rock Outcrop Complex and identified as soil map unit no. 183. This soil is excessively well drained and
characterized as having severe erosion potential, especially given the 15-75% slopes. The remaining soil
types proximate to Froom Creek are Gazos-Lodo clay loam and Los Osos loam. A soils map and
complete listing of soils found within Waddell Ranch is included as Appendix B.
2.4 Species Inventory
A Botanical Inventory and Wildlife Survey prepared by Terra Verde Environmental (2017) found four
different sensitive wildlife species to be present, including California led-legged frog (Rana draytonii),
Monarch butterfly (Danaus plexippus), Townsend’s big-eared bat (Corynorhinus townsendii), and
Western pond turtle (Actinemys marmorata). Fifteen special status plants were identified, including a
novel species, Irish Hills spineflower (Chorizanthe aphanantha), that is not previously known to science;
additional focus surveys for this species were conducted by Terra Verde Environmental in 2018. See
Appendix C and D for Terra Verde Environmental’s complete memoranda, species lists, and mapping.
The special status plant species are primarily serpentine-endemic, and include: Bishop manzanita
(Arctostaphylos obispoensis), club-haired mariposa lily (Calochortus clavatus), San Luis mariposa lily
Calochortus obispoensis), Cambria morning glory (Calystegia subacaulis subsp. episcopalis), San Luis
Obispo sedge (Carex obispoensis), San Luis Obispo owl’s clover (Castilleja densiflora subsp. obispoensis),
Brewer’s spineflower (Chorizanthe breweri), Palmer’s spineflower (Chorizanthe palmeri), mouse-grey
dudleya (Dudleya abramsii subsp. murina), Blochman’s dudleya (Dudleya blochmaniae subsp.
blochmaniae), small-leaved lomatium (Lomatium parvifolium), Palmer’s monardella (Monardella
palmeri), Adobe yampah (Perideridia pringlei), and Hoffman’s sanicle (Sanicula hoffmannii).
Survey techniques included visual observation, remote-sensing wildlife cameras, and an acounstic bat
detector. Locations for these special status wildlife and botanical species were mapped using Global
Positioning Units (GPS) and Geographic Information Systems (GIS) software. There are no prior wildlife or
botanical surveys known to exist; as such, these observations were documented and submitted to the
California Natural Diversity Database maintained by the California Department of Fish and Wildlife. In
addition, there is the possibility that sensitive or special status species may exist that were not found and
documented in the survey work.
Irish Hills spineflower
Serpentine habitats are well known to support a unique flora, including numerous rare, endangered,
and endemic species. Most of the special-status plants listed above occur within scrub and/or
chaparral communities on serpentine outcrops. Of particular note, a species of spineflower
(Chorizanthe aphanantha), not previously known to science, was observed on a serpentine outcrop
and extending into adjacent chaparral habitat in the northern corner of the property during the survey
on June 02, 2017 by Terra Verde Environmental botanist Kristen Nelson. Identification of the novel
species was confirmed by Dr. David J. Keil and a follow-up site visit was made to document the size and
extent of the population, specific habitat characteristics, and to make voucher collections for submittal
to the Hoover Herbarium at California Polytechnic State University, San Luis Obispo (Cal Poly) on June
17, 2017. Cal Poly botany professors Drs. Matt Ritter and Jenn Yost, recent Cal Poly graduate Kyle
Nessen (photographer), Terra Verde Environmental founder Brooke Langle, and City of San Luis Obispo
Natural Resources Manager Robert Hill, also participated in the site visit on June 17, 2017.
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As only 150-200 individuals were observed at the time of discovery in 2017, subsequent focus surveys
were completed throughout the month of May and in early June 2018. Approximately 24,000
individuals of Irish Hills spineflower were documented throughout the Waddell Ranch and Irish Hills
Natural Reserve during these follow up surveys in 2018. Dense populations were documented along the
northern end of the Mariposa Trail, in two meadow openings in the chaparral along the Ocean View
Trail, and in the vicinity of two abandoned chromite mines off the Mine and Wednesday Trails. More
scattered occurrences were documented along the Froom Creek, Poppy, Canyon View, and Morro
View Trails. Additional areas of suitable habitat exist in portions of the Reserve that were not included in
the 2018 focused surveys. In particular, the ridgeline that borders the eastern edge of the Waddell
Ranch parcel and the hill that covers the southwestern corner of the Waddell Ranch parcel support a
mosaic of dense to open chaparral with occasional grassy and rocky openings that appear suitable for
supporting Irish Hills spineflower. Although the known range and population size of this species was
greatly expanded during the 2018 surveys, the specific habitat requirements and overall limited range
of the species warrants careful management to avoid adverse impacts to the population on City-
owned property. It appears that Irish Hills spineflower is tolerant of limited disturbance associated with
the creation, recreational use, and maintenance of trails through chaparral, although much is still to be
learned about Irish Hills spineflower. The new species has been submitted for publication in Madroño¸
the peer-reviewed journal of the California Botanical Society, and will be recommended for listing on
the California Rare Plant Rank (CRPR) 1B.2 list.
Table 1: Representative Special Status Species Observations at Waddell Ranch
California red-legged frog (Rana draytonii)
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Western pond turtle snout in the stock pond (Actinemys marmorata)
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San Luis mariposa lily
Calochortus obispoensis
Palmer’s monardella
Monardella palmeri
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Irish Hills spineflower (Chorizanthe aphanantha) and Brewer’s spineflower (Chorizanthe breweri)
Irish Hills spineflower (Chorizanthe aphanantha)
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Figure 5: Map of Sensitive Resources
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Figure 6: Map of Vegetation Communities
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2.4 Vegetation Communities
A suite of nine vegetation communities are found on the Waddell Ranch, as described by Terra Verde
Environmental consistent with the classification system set forth in A Manual of California Vegetation
(Sawyer et al., 2009):
Buck Brush/Leather Oak Chaparral
Chaparral is the dominant habitat type on the Waddell Ranch property, dominating the higher
elevation areas of the site. This community generally forms a closed-canopy of dense shrub cover
ranging from four to seven feet high. Dominants in this community include buck brush (Ceanothus
cuneatus var. ramulosus), leather oak (Quercus durata var. durata), and chamise (Adenostoma
fasciculatum var. fasciculatum), with toyon (Heteromeles arbutifolia), black sage (Salvia mellifera), and
chaparral yucca (Hesperoyucca whipplei) occurring at variable density. Five individuals of Bishop
manzanita (Arctostaphylos obispoensis) were found in association with this community.
California Sagebrush-Black Sage Scrub
This community occurs in several areas on southwest-facing slopes, generally at mid-level elevations
between chaparral habitats and low-lying grassland or woodland communities. California sagebrush
(Artemisia californica) and black sage are co-dominant, with coyote brush (Baccharis pilularis subsp.
consanguinea), California coffee berry (Frangula californica), chamise, and other species from the
adjacent chaparral occurring at low cover.
Yucca Scrub/Serpentine Outcrop
This community generally occurs as a marginal or transitional area in openings and at the edges of
chaparral and California sagebrush-black sage scrub. Chaparral yucca is the dominant species in these
areas, with golden-yarrow (Eriophyllum confertiflorum var. confertiflorum) often occurring as a co-
dominant, and various other chaparral and scrub species occurring at low cover. This habitat tends to
be very open, with large areas of exposed, rocky outcrops and moderate cover of herbaceous and/or
annual species. This habitat is particularly suitable for most of the special-status taxa documented on
site, including the newly discovered species of spineflower.
Serpentine Seeps
Several perennial or nearly-perennial seeps were identified within the serpentine outcrops on site. These
areas are generally surrounded by areas of chaparral and scrub habitat, but support a unique
assemblage of plants due to the presence of perennial water. California coffee berry forms variable
shrub cover, with California lomatium (California lomatium) and several species of rushes (Juncus spp.)
and sedges (Carex spp.) dominating the herbaceous cover. This unique habitat occurs in limited areas.
Annual Grasslands and Meadows
The grassland habitat documented on site is highly variable, but is generally dominated by non-native
annual grass species, with variable cover of forbs and perennial grasses. Bromes (Bromus spp.) are the
dominant grasses in most areas, with oats (Avena spp.) and false brome (Brachypodium distachyon)
occurring as co-dominants. Non-native and invasive forbs are generally concentrated in the low-lying
areas adjacent to Froom Creek and the remnant structures. In particular, fennel (Foeniculum vulgare),
red brome (Bromus madritensis subsp. rubens), and Himalayan blackberry (Rubus armeniacus),
California Invasive Plant Council rated ‘High’ species, were documented in these areas. Occasional
openings in the chaparral support grassland/meadow habitat that generally support a higher percent
cover of native grasses and forbs.
Coast Live Oak / Mixed Riparian Woodland
Coast live oak (Quercus agrifolia) forms the dominant tree cover along Froom Creek and adjacent,
non-riparian woodland habitats. Arroyo willow (Salix lasiolepis) and California bay (Umbellularia
californica) occur as co-dominants in the tree canopy, with poison oak (Toxicodendron diversilobum),
pink honeysuckle (Lonicera hispidula), and blackberry (Rubus spp.) forming a dense understory.
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Arroyo Willow Scrub
In addition to occurring as a characteristic component of the coast live oak woodland habitat, arroyo
willow is the dominant overstory species in the seasonal stream between Froom Creek and the stock
pond, and around the uphill (southern) margin of the pond. Brewer’s willow (Salix breweri) occurs as a
co-dominant in the dense overstory of this stream, with a sparse understory occurring in limited areas
where the tree canopy is less dense.
Cattail Marshes
Southern cattail (Typha domingensis) occurs as emergent vegetation in a dense band along the
northeastern and northwestern margins of the stock pond. Common spikerush (Eleocharis
macrostachya) and several species of rushes (Juncus spp.) occur as characteristic components of this
community. Although this community occurs in a very limited portion of the site, it provides important
foraging, cover, and nesting habitat for semi-aquatic reptiles, amphibians, and birds that rely on the
perennial water source of the stock pond.
Coyote Brush Scrub
Coyote brush occurs as the dominant shrub cover in several marginal habitat areas, including along the
northern edge of the stock pond and lining the ephemeral drainages that flow into the stock pond from
the south. Arroyo willow, California blackberry (Rubus ursinus), and California coffee berry occur at low
cover in association with this community.
2.6 Natural Resources Protection
In considration of the exceptional biological diversity found at the Waddell Ranch, the Plan calls for
avoidance of all special status species, as well as ongoing site surveys and monitoring, in order to ensure
that impacts are avoided. Protective management recommendations set forth by Terra Verde
Environmental (2017 and 2018) are also incorporated by reference into the Plan. These are:
1. Improvements to stream crossings for pedestrian and/or vehicle use should be implemented in
the late summer to early fall when nesting bird activity, Cqlifornia red-legged frog and western
pond turtle dispersal, and water flow are minimal, to reduce the potential for impacts to these
species and their habitats. Similarly, demolition of existing structures and installation of new
structures should be timed to avoid seasonal impacts to riparian/aquatic habitats and sensitive
species.
2. The establishment or maintenance of trails at stream crossings should be planned to avoid any
downstream sedimentation or discharges of soil or other materials.
3. Vehicles, hand tools, and other equipment brought on site should be cleaned of all soil/mud
and other debris to avoid the spread of non-native or invasive plants to the site.
4. Remove saplings/volunteer sprouts of Aleppo pine, blue gum, and red gum, whenever possible.
Aleppo pine has already become naturalized within the ornamental stand of trees near the
northern corner of the property.
5. Establishment of new trails through dense shrub and/or tree habitat should avoid known,
occupied habitat for special-status plants, especially the newly described species of
spineflower, or such work should occur after the flowering and fruiting period for annual special-
status species populations that may be impacted.
6. Where feasible, the establishment/improvement of trails should occur where remnant trails/roads
previously existed.
7. Install interpretive trail signs to inform the public of the sensitivity of resources present, and
important ways in which those resources can be protected (e.g., stay on trail, pack-in/pack-out
trash, don’t pick wildflowers, etc.).
8. Establishment and maintenance of trails through chaparral habitat should occur outside the
flowering and fruiting period for Irish Hills spineflower to the extent feasible, which may span from
mid-March through late June.
9. Surrounding the old homestead and near the Froom Creek Trail access to the Waddell
Ranch parcel, remove saplings/volunteer sprouts of Aleppo pine (Pinus halepensis), blue
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gum (Eucalyptus globulus), and red gum (Eucalyptus camaldulensis), whenever possible, to
avoid spread into adjacent habitat. Aleppo pine has already become naturalized within the
ornamental stand of trees along the Froom Creek Trail.
Trail and fire hazard reduction activities will avoid mapped sensitive areas and will be undertaken only
with prior site-specific survey work. Short-term grazing will create favorable disturbance and recovery
periods for botanical species located in grassland areas. It should also be noted that the City’s Open
Space Regulations prohibit off-trail travel where it will negatively impact natural resources and public
use of the property will be regularly patrolled by the City’s Ranger Service.
3. Goals and Policies
In addition to the specific natural resources protection management recommendations described,
above, the applicable policies of Conservation and Open Space Element of the City’s General Plan
and the Conservation Guidelines for Open Space Lands of the City of San Luis Obispo (2002) and Open
Space Regulations (1998) are also incorporated by reference.
The Irish Hills Natural Reserve Conservation Plan – Waddell Ranch Addition has as its overarching goal to
achieve sustainable conservation of habitat, while also allowing for passive recreational elements. The
Plan will accomplish this goal, and address the management issues described, above, through the
following goals and policies.
Goals and Policies
The City will manage Waddell Ranch with the following goals and policies:
3.1 Conserve, enhance, and restore natural plant and wildlife communities by protecting their habitats
in order to maintain viable wildlife populations within balanced ecosystems.
3.2 Provide the public with an opportunity for greater understanding and appreciation for the cultural
and historic resources values associated with the Waddell Ranch. Allow for ceremonial uses by the
Northern Chumash and other traditionally and culturally affiliated California Native American tribes.
3.3 Provide the public with a safe, accessible, and pleasing natural environment in which to pursue
passive recreational activities, including hiking and biking, while maintaining the integrity of natural
resources and minimizing the impacts on the wildlife and habitats that are present.
3.4 Actively address sedimentation sources and erosion.
3.5 Avoid and minimize the impacts of activities, such as off-trail hiking and biking use by providing
signage and interpretive features to enhance user safety, for educational purposes, and to help
prevent unauthorized uses of the property.
3.7 Maintain, protect, and improve aesthetic views as seen from various locations throughout the City
of San Luis Obispo.
3.8 Protect and honor the important historic and cultural values associated with the property.
3.9 Regularly monitor and patrol the Open Space, establish Levels of Acceptable Change (LAC), and
take action to correct areas or problems that exceed LAC.
3.10 Vegetation Management
3.10.1 The City will monitor and manage vegetation to meet prescribed goals for the land.
Management strategies such as the following will be implemented where necessary: physical
Irish Hils Natural Reserve Conservation Plan – Waddell Ranch Addition
20
pruning/removal of unwanted or problematic vegetation – especially dead, dying, diseased, or non-
native species; controlled, seasonal grazing; erosion and sediment control or removal strategies; and,
application of Integrated Pest Management practices where needed and as appropriate.
3.10.2 Restoration and/or re-vegetation techniques will be utilized when necessary to restore a
degraded vegetative community to a fully functioning ecosystem. All restoration activities will utilize site
or region-specific native grasses, herbs, shrubs, and trees. Planting of invasive, non-native species will be
prohibited. Adjacent landowners are encouraged to undertake efforts to control target non-native
vegetation on their land.
3.10.3 All existing native trees will be protected wherever possible, and new native trees planted to
enhance wildlife habitat. Where possible, vegetation will be left to follow its natural course of
succession; however hazardous trees and fire protection will necessitate active management in some
areas and instances. The ultimate goal will be to re-establish, or preserve, a self-sustaining ecosystem.
3.11 Passive Recreation
Passive recreational activities such as quiet and scenic enjoyment, hiking, and biking are
accommodatred by the Plan. All recreational uses will be monitored and patrolled in accordance with
the City of San Luis Obispo’s Open Space Regulations, Municipal Code, Chapter 12.22.
Active recreational uses are considered more intrusive to the natural environment and include activities
such as special events, use of motorized vehicles and drones, discharge of weapons, paintball, and
hunting, all of which are prohibited.
3.12 Scientific Research
Non-destructive scientific study and research will be permitted with prior, written approval from the
City’s Natural Resources Manager. A condition of approval will be that the applicant provides the City
with a written report of the findings of the study. This will assist the City in continuing to compile a
detailed inventory and deeper understanding of the natural and biological resources located within
Waddell Ranch.
4. Conservation Plan
4.1 Naming
The purpose of this Plan is to incorporate Waddell Ranch Open Space into the Irish Hills Natural Reserve.
More than one property comprised of a multiple parcels acquired from different parties is considered a
“Natural Reserve” under the City’s Open Space Regulations (Municipal Code, 12.22.030).
4.2 Land Use Designations
The property is zoned Rural Lands and will remain within the County of San Luis Obispo. Internal land
uses of Waddell Ranch are explained below.
4.2.1 Habitat Area – Land areas where the primary objective will be to protect natural resources by
maintaining intact native plant communities and habitat for both resident and migratory wildlife. Other
than active management areas and restoration areas, all other land with Waddell Ranch is designated
as a habitat area.
4.2.2 Management Areas - While the vast majority of the Waddell Ranch and Irish Hills Natural Reserve
are to be protected as habitat areas, there are certain improved areas where active management
and maintenance will be required. These are described below and located in Figure 7 on page 22.
a. Maintained Trails – Active management of land in these areas will be required to facilitate
approved activities while protecting valuable natural resources. These trails are generally kept clear
and receive maintenance as needed to prevent erosion, pooling of water, and instability. Slopes range
Irish Hils Natural Reserve Conservation Plan – Waddell Ranch Addition
21
generally from less than 10% to as much as 20% in a few brief areas. Biking is allowable on maintained
trails.
b. Dirt Road – A vehicular access road provides access to Waddell Ranch from the westerly
gate. This road will be managed primarily as a trail corridor, and will receive periodic maintenance.
Vehicular use shall be restricted to authorized City personnel for management and maintenance
purposes only, as well as emergency services.
c. “Arizona” crossing – An existing “Arizona” crossing through Froom Creek is comprised of a
concrete apron with dirt approach on both sides. The apron is underlain with a non-functional and
deteriorating culvert that will require repair or removal in the future. Periodic maintenance will be
necessary for this facility to remain functional.
d. Viewing and Shade Benches – A viewing bench at the top of the ridge will provide an
attractive amenity with ocean views. An additional seating area at the location of the old cabin site
will provide one of the few shady rest spots on the property.
e. Grazing – The grassland portions of Waddell Rancg were historically grazed by cattle and
horses. “High intensity, short duration” controlled seasonal grazing with cattle appears to be a viable
management strategy for reducing hazardous fuel loads, while the recruitment of native bunchgrasses
and annual forbs that are adapted to a disturbance regime is also a desired management goal.
Successful implementation will require close supervision. The existing rock pasture walls will be
maintained in situ.
f. Gates, Signs, Fencing and Water Systems – The entry gates shall be maintained in functional
condition to ensure readily available access for emergency response, maintenance purposes, and
periodic closure when necessary. Signs within Waddell Ranch shall also be constructed and maintained
in legible and functional condition for educational, directional, and safety purposes. As fencing is
repaired or replaced, five-strand fencing should be installed that is barbless on the top and bottom
strand, with the bottom strand being located 18” off the ground in order to allow for safe wildlife
passage both over and under the fence. The existing spring box will be maintainted, and it is possible
that the existing windmill on site could also be refurbished. The old water tank located near the top of
Froom Canyon should be removed as it represents an attractive nuisance.
4.3 Photo Monitoring Points
Photo-monitoring points throughout Waddell Ranch were established to document baseline conditions
and periodically observe changes. Photo points include overlooks, areas anticipated to receive public
use, and habitats with sensitive plant and wildlife species.
The photo points are used to establish baseline conditions in order to track conditions and Levels of
Acceptable Change (LAC) over time. Additional points may be added as necessary if conditions
change or new issues arise. Photos points and an associated map of point locations are included as
Appendix A.
Irish Hils Natural Reserve Conservation Plan – Waddell Ranch Addition
22
Figure 7: Waddell Ranch Management Areas & Combined Trail Map
Irish Hils Natural Reserve Conservation Plan – Waddell Ranch Addition
23
5. Wildfire Preparedness Plan
Waddell Ranch is designated as a Very High Fire Hazard Severity Zone by Cal Fire. Waddell Ranch is
entirely surrounded by other open land uses comprised of private ranches and other conservation
lands. Significant wildland fire hazard risk exists due to prevailing westerly winds; presence of annual
grassland, chaparral, oak woodland, and mixed ornamental trees and vegetation; and due to the fact
that there is no significant recorded fire history in the larger Irish Hills system. Accordingly, City Open
Space Regulations prohibit fires, smoking, discharge of weapons, and fireworks or any kind, and also
allow for closure if hazardous conditions warrant such action (12.22.050). Important pre-fire activity
includes the use of controlled and seasonal grazing (as described in 4.2.2 (e), above). Exclusion of fire
as a management strategy and as part of the natural fire ecology is anticipated, so this plan also calls
for the removal of dead and downed trees and shrubs and phased removal of eucalyptus and Aleppo
pine, al of which can be highly flammable during the dry season.
Waddell Ranch is closest to City Fire Station 4, which is typically equipped with wildland fire fighting
apparatus (Type III or similar), however primary responsibility is with Cal Fire due to the property being
located in County of San Luis Obispo jurisdiction. The only driving access into Waddell Ranch is through
the private access road located off of Prefumo Canyon Road, which can be opened with a Parks
Master key (marked PM on the lock itself). There are several other access points that provide
emergency ingress and egress to open space users. The City does not maintain any critical, at-risk
infrastructure within the property itself.
6. Implementation
General maintenance activities in accordance with the adopted policies described in Conservation
Guidelines for Open Space Lands of the City of San Luis Obispo(2002), the Conservation and Open
Space Element (2006) and the Open Space Maintenance Plan (2015) shall be implemented on a
regular or as-needed basis.
Specific Tasks are anticipated as follows, subject to available funding:
Years 1-3
• Install new, updated signage at trailheads and along trails
• Install new trail sections
• Install new kit fiberglass bridge
• Install seating areas
• Continue special status species monitoring, especially Irish Hill spineflower
Ongoing Specific Tasks
• Maintain roads, trails and active areas
• Monitor non-native, dead, or dying vegetation and remove as appropriate
• Regularly patrol the property and interact with users
• Implement and monitor grazing strategy for hazardous fuel reduction
• Site stewardship and “pride of ownership” tasks
• Work with local universities to contiunue resource inventories
7. Fiscal Statement
Day-to-day management of Waddell Ranch will continue to be supported through the operating
budgets within the Natural Resources Program and Ranger Service. City staff will also pursue grants and
volunteers to augment funding for this plan’s identified projects. Overall, the fiscal impact of the Plan
and its implementation is considered relatively minor given opportunities to phase projects and
leverage modest investments of City funds.
Irish Hils Natural Reserve Conservation Plan – Waddell Ranch Addition
24
8. Updates and Amendment
This Conservation Plan is intended to guide management actions over the course of the next ten years,
after which time staff should consider the need for an update. Any portion of the plan may be
considered for amendment upon request. Any citizen or other interested party may initiate such a
request, and shall be directed to the City Manager or designee. Such a request will include the nature
of the requested amendment and rationale for the request. If appropriate, the amendment will be
processed in the same manner as the original Conservation Plan.
Serpentine columbine (Aquilegia eximia)
Irish Hils Natural Reserve Conservation Plan – Waddell Ranch Addition
25
Appendix A:
Photo Monitoring Points & Map
Photo monitoring points for Waddell Ranch. These locations may be modified, or new locations may be
added, as conditions warrant.
Table 2: Photo Monitoring Points:
(All photos established by Terra Verde Environmental, May 5 and June 2, 2017)
1. View north across the
central valley of the
Waddell Ranch property
2. View east toward
grassy meadows near
southern property
boundary
Irish Hils Natural Reserve Conservation Plan – Waddell Ranch Addition
26
3. View north along
historical rock wall
toward western property
boundary
4. Grassy meadow
habitat with seasonal
seep, in opening of
chaparral near southern
property boundary
5. View south across the
property from the
ridgeline north of Froom
Creek
Irish Hils Natural Reserve Conservation Plan – Waddell Ranch Addition
27
Appendix B:
Soil Report for Terrace Hill Open Space
United States
Department of
Agriculture
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
San Luis Obispo
County, California,
Coastal Part
Waddell Ranch Soil Report
Natural
Resources
Conservation
Service
September 12, 2018
Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/
portal/nrcs/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil
Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?
cid=nrcs142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require
2
alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity
provider and employer.
3
Contents
Preface....................................................................................................................2
How Soil Surveys Are Made..................................................................................5
Soil Map..................................................................................................................8
Soil Map................................................................................................................9
Legend................................................................................................................10
Map Unit Legend................................................................................................12
Map Unit Descriptions........................................................................................12
San Luis Obispo County, California, Coastal Part..........................................14
144—Gazos-Lodo clay loams, 30 to 50 percent slopes..............................14
161—Los Osos loam, 30 to 50 percent slopes...........................................15
183—Obispo-Rock outcrop complex, 15 to 75 percent slopes...................17
Soil Information for All Uses...............................................................................19
Soil Reports........................................................................................................19
Soil Erosion.....................................................................................................19
Conservation Planning (Waddell Ranch Soil Report)..................................19
References............................................................................................................21
4
How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil-vegetation-landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil
5
scientists classified and named the soils in the survey area, they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil-landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil-landscape model is refined, a significantly smaller
number of measurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field-observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
Custom Soil Resource Report
6
identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.
Custom Soil Resource Report
7
Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
8
9
Custom Soil Resource Report
Soil Map
39023003902500390270039029003903100390330039035003902300390250039027003902900390310039033003903500707200 707400 707600 707800 708000 708200 708400 708600 708800 709000
707200 707400 707600 707800 708000 708200 708400 708600 708800 709000
35° 15' 12'' N 120° 43' 26'' W35° 15' 12'' N120° 42' 8'' W35° 14' 30'' N
120° 43' 26'' W35° 14' 30'' N
120° 42' 8'' WN
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84
0 400 800 1600 2400
Feet
0 100 200 400 600
Meters
Map Scale: 1:9,090 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: San Luis Obispo County, California, Coastal
Part
Survey Area Data: Version 10, Sep 13, 2017
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Dec 31, 2009—Feb
23, 2017
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
Custom Soil Resource Report
10
MAP LEGEND MAP INFORMATION
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
Custom Soil Resource Report
11
Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
144 Gazos-Lodo clay loams, 30 to
50 percent slopes
5.5 3.6%
161 Los Osos loam, 30 to 50
percent slopes
13.7 9.0%
183 Obispo-Rock outcrop complex,
15 to 75 percent slopes
132.3 87.4%
Totals for Area of Interest 151.4 100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
given area, the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
Custom Soil Resource Report
12
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
Custom Soil Resource Report
13
San Luis Obispo County, California, Coastal Part
144—Gazos-Lodo clay loams, 30 to 50 percent slopes
Map Unit Setting
National map unit symbol: hbnp
Elevation: 300 to 2,000 feet
Mean annual precipitation: 15 to 28 inches
Mean annual air temperature: 57 to 59 degrees F
Frost-free period: 250 to 350 days
Farmland classification: Not prime farmland
Map Unit Composition
Gazos and similar soils: 45 percent
Lodo and similar soils: 40 percent
Minor components: 14 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Gazos
Setting
Landform: Hills, mountains
Landform position (two-dimensional): Backslope, summit
Landform position (three-dimensional): Mountainflank, crest, side slope
Down-slope shape: Convex, linear
Across-slope shape: Convex
Parent material: Residuum weathered from sandstone and shale
Typical profile
H1 - 0 to 30 inches: clay loam
H2 - 30 to 40 inches: unweathered bedrock
Properties and qualities
Slope: 30 to 50 percent
Depth to restrictive feature: 22 to 38 inches to lithic bedrock
Natural drainage class: Well drained
Runoff class: Very high
Capacity of the most limiting layer to transmit water (Ksat): Very low (0.00 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Low (about 5.4 inches)
Interpretive groups
Land capability classification (irrigated): 7e
Land capability classification (nonirrigated): 7e
Hydrologic Soil Group: C
Ecological site: FINE LOAMY (R015XD024CA)
Hydric soil rating: No
Description of Lodo
Setting
Landform: Hills, mountains
Landform position (two-dimensional): Backslope, summit
Landform position (three-dimensional): Mountainflank, crest, side slope
Custom Soil Resource Report
14
Down-slope shape: Convex, linear
Across-slope shape: Convex
Parent material: Residuum weathered from sandstone and shale
Typical profile
H1 - 0 to 12 inches: clay loam
H2 - 12 to 22 inches: unweathered bedrock
Properties and qualities
Slope: 30 to 50 percent
Depth to restrictive feature: 4 to 20 inches to lithic bedrock
Natural drainage class: Somewhat excessively drained
Runoff class: Very high
Capacity of the most limiting layer to transmit water (Ksat): Very low (0.00 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Very low (about 1.9 inches)
Interpretive groups
Land capability classification (irrigated): 6e
Land capability classification (nonirrigated): 6e
Hydrologic Soil Group: D
Ecological site: SHALLOW FINE LOAMY (R015XD070CA)
Hydric soil rating: No
Minor Components
Diablo, clay
Percent of map unit: 4 percent
Hydric soil rating: No
Cibo, clay
Percent of map unit: 4 percent
Hydric soil rating: No
Los osos, loam
Percent of map unit: 3 percent
Hydric soil rating: No
Unnamed
Percent of map unit: 3 percent
Hydric soil rating: No
161—Los Osos loam, 30 to 50 percent slopes
Map Unit Setting
National map unit symbol: hbp7
Elevation: 100 to 3,000 feet
Mean annual precipitation: 15 to 35 inches
Mean annual air temperature: 55 to 59 degrees F
Custom Soil Resource Report
15
Frost-free period: 275 to 350 days
Farmland classification: Not prime farmland
Map Unit Composition
Los osos and similar soils: 85 percent
Minor components: 14 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Los Osos
Setting
Landform: Hills, ridges
Landform position (two-dimensional): Backslope, summit
Landform position (three-dimensional): Mountaintop, crest, side slope
Down-slope shape: Convex
Across-slope shape: Convex, linear
Parent material: Residuum weathered from sandstone and shale
Typical profile
H1 - 0 to 14 inches: loam
H2 - 14 to 32 inches: clay
H3 - 32 to 39 inches: sandy loam
H4 - 39 to 59 inches: weathered bedrock
Properties and qualities
Slope: 30 to 50 percent
Depth to restrictive feature: 20 to 40 inches to paralithic bedrock
Natural drainage class: Well drained
Runoff class: Very high
Capacity of the most limiting layer to transmit water (Ksat): Very low (0.00 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Low (about 5.6 inches)
Interpretive groups
Land capability classification (irrigated): 7e
Land capability classification (nonirrigated): 7e
Hydrologic Soil Group: D
Ecological site: LOAMY CLAYPAN (R015XD049CA)
Hydric soil rating: No
Minor Components
Cibo, clay
Percent of map unit: 2 percent
Hydric soil rating: No
Diablo, clay
Percent of map unit: 2 percent
Hydric soil rating: No
Gazos, clay loam
Percent of map unit: 2 percent
Hydric soil rating: No
Lodo, clay loam
Percent of map unit: 2 percent
Custom Soil Resource Report
16
Hydric soil rating: No
Rock outcrop
Percent of map unit: 2 percent
Hydric soil rating: No
Lompico
Percent of map unit: 2 percent
Hydric soil rating: No
Mcmullin
Percent of map unit: 2 percent
Hydric soil rating: No
183—Obispo-Rock outcrop complex, 15 to 75 percent slopes
Map Unit Setting
National map unit symbol: hbpy
Elevation: 200 to 4,000 feet
Mean annual precipitation: 8 to 35 inches
Mean annual air temperature: 45 to 57 degrees F
Frost-free period: 110 to 350 days
Farmland classification: Not prime farmland
Map Unit Composition
Obispo and similar soils: 50 percent
Rock outcrop: 30 percent
Minor components: 20 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Obispo
Setting
Landform: Mountain slopes, ridges
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Mountainflank, mountaintop
Down-slope shape: Linear
Across-slope shape: Convex
Parent material: Residuum weathered from serpentinite
Typical profile
H1 - 0 to 11 inches: clay
H2 - 11 to 18 inches: weathered bedrock
H3 - 18 to 28 inches: unweathered bedrock
Properties and qualities
Slope: 15 to 75 percent
Depth to restrictive feature: 8 to 20 inches to lithic bedrock
Natural drainage class: Well drained
Runoff class: Very high
Capacity of the most limiting layer to transmit water (Ksat): Very low (0.00 in/hr)
Depth to water table: More than 80 inches
Custom Soil Resource Report
17
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Very low (about 1.5 inches)
Interpretive groups
Land capability classification (irrigated): 7e
Land capability classification (nonirrigated): 7e
Hydrologic Soil Group: D
Ecological site: SHALLOW CLAYEY SERPENTINE (R015XD146CA)
Hydric soil rating: No
Description of Rock Outcrop
Setting
Landform: Hills
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Crest, side slope
Down-slope shape: Convex
Across-slope shape: Convex
Typical profile
H1 - 0 to 60 inches: unweathered bedrock
Properties and qualities
Slope: 15 to 75 percent
Depth to restrictive feature: 0 inches to lithic bedrock
Runoff class: Very high
Interpretive groups
Land capability classification (irrigated): 8
Land capability classification (nonirrigated): 8
Hydric soil rating: No
Minor Components
Diablo, clay
Percent of map unit: 7 percent
Hydric soil rating: No
Henneke, clay loam
Percent of map unit: 7 percent
Hydric soil rating: No
Unnamed
Percent of map unit: 6 percent
Hydric soil rating: No
Custom Soil Resource Report
18
Soil Information for All Uses
Soil Reports
The Soil Reports section includes various formatted tabular and narrative reports
(tables) containing data for each selected soil map unit and each component of
each unit. No aggregation of data has occurred as is done in reports in the Soil
Properties and Qualities and Suitabilities and Limitations sections.
The reports contain soil interpretive information as well as basic soil properties and
qualities. A description of each report (table) is included.
Soil Erosion
This folder contains a collection of tabular reports that present soil erosion factors
and groupings. The reports (tables) include all selected map units and components
for each map unit. Soil erosion factors are soil properties and interpretations used in
evaluating the soil for potential erosion. Example soil erosion factors can include K
factor for the whole soil or on a rock free basis, T factor, wind erodibility group and
wind erodibility index.
Conservation Planning (Waddell Ranch Soil Report)
This report provides those soil attributes for the conservation plan for the map units
in the selected area. The report includes the map unit symbol, the component
name, and the percent of the component in the map unit. It provides the soil
description along with the slope, runoff, T Factor, WEI, WEG, Erosion class,
Drainage class, Land Capability Classification, and the engineering Hydrologic
Group and the erosion factors Kf, the representative percentage of fragments, sand,
silt, and clay in the mineral surface horizon. Missing surface data may indicate the
presence of an organic surface layer. Further information on these factors can be
found in the National Soil Survey Handbook section 618 found at the url http://
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ref/?cid=nrcs142p2_054223#00 .
19
Soil properties and interpretations for conservation planning. The surface mineral horizon properties are displayed. Organic
surface horizons are not displayed.
Conservation Planning–San Luis Obispo County, California, Coastal Part
Map symbol and soil
name
Pct. of
map
unit
Slope
RV
USLE
Slope
Length
ft.
Runoff T
Fact
or
WEI WEG Erosion Drainage NIRR
LCC
Hydro
logic
Group
Surface
Depths
in.
Kf
Fact
or
Frag-
ments
RV
Sand
RV
Silt
RV
Clay
RV
144—Gazos-Lodo clay
loams, 30 to 50
percent slopes
Gazos 45 40.0 —Very high 2 48 6 —Well drained 7e C 0 - 29 .28 10 34 37 28
Lodo 40 40.0 —Very high 1 48 6 —Somewhat
excessively
drained
6e D 0 - 11 .32 10 35 38 26
161—Los Osos loam, 30
to 50 percent slopes
Los Osos 85 40.0 —Very high 3 48 6 —Well drained 7e D 0 - 14 .32 5 39 37 23
183—Obispo-Rock
outcrop complex, 15 to
75 percent slopes
Obispo 50 45.0 —Very high 1 86 4 —Well drained 7e D 0 - 11 .17 12 22 27 50
Rock outcrop 30 45.0 —Very high ———————0 - 59 —————
Custom Soil Resource Report
20
References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
National Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/
nrcs/detail/national/soils/?cid=nrcs142p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/
home/?cid=nrcs142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/
detail/national/landuse/rangepasture/?cid=stelprdb1043084
21
United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/
nrcs/detail/soils/scientists/?cid=nrcs142p2_054242
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook
296. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?
cid=nrcs142p2_053624
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf
Custom Soil Resource Report
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Irish Hils Natural Reserve Conservation Plan – Waddell Ranch Addition
28
Appendix C:
Results of Botanical Inventory and Wildlife Surveys Completed on the Waddell Ranch
Property, Irish Hills Natural Reserve, City of San Luis Obispo, California, Terra Verde
Environmental, June 30, 2017
3765 South Higuera Street, Suite 102 San Luis Obispo, CA 93401 702-596-5038 knelson@terraverdeweb.com
June 30, 2017
Mr. Bob Hill
Natural Resources Manager
City of San Luis Obispo
990 Palm Street
San Luis Obispo, CA 93401
RE: Results of Botanical Inventory and Wildlife Surveys Completed on the Waddell Ranch
Property, Irish Hills Natural Reserve, City of San Luis Obispo, California
Dear Mr. Hill,
This memorandum is being provided to summarize the results of botanical and wildlife surveys
completed by Terra Verde Environmental Consulting, LLC (Terra Verde) at the City of San Luis
Obispo’s (City) newly-acquired Waddell Ranch property. Waddell Ranch is an approximately
154-acre parcel that abuts the western edge of the existing Irish Hills Natural Reserve (Reserve),
in San Luis Obispo, California. The Waddell Ranch property will be added to the total area of the
Reserve for conservation and recreation purposes. As such, the City is planning to amend and
update the existing Irish Hills Natural Reserve Conservation Plan Update (City of SLO, 2011 [see
Attachment A]) to include the resources and conditions present on the new parcel. To support
the proposed plan updates, Terra Verde completed an inventory and assessment of biological
resources present on the Waddell Ranch parcel, which included a single-season botanical
inventory, wildlife surveys, vegetation community classification and mapping, and an evaluation
of management considerations. The results of this assessment are provided below.
Survey Methodology
Terra Verde conducted a series of surveys in April, May, and June, 2017 to capture a range of
seasonal conditions through the mid- to late spring. Prior to conducting field surveys, the
current Irish Hills Natural Reserve Conservation Plan Update (City of SLO, 2011) was reviewed,
which documents the biological resources known to occur in the existing Reserve area, as well
as current management strategies. The following additional resources were consulted prior to
completing field surveys:
Aerial photographs of the site and adjacent areas;
Consortium of California Herbaria (CCH) online database of plant collections for the area
surrounding Waddell Ranch (CCH, 2017);
2
A California Natural Diversity Database (CNDDB) map and list of rare, threatened, and
endangered species known to occur within two miles of the Waddell Ranch property (see
Attachment B, Figure 1) (California Department of Fish and Wildlife [CDFW] 2017);
The California Native Plant Society (CNPS) Inventory of Rare and Endangered Plants for
the San Luis Obispo 7.5-minute quadrangle (CNPS 2017);
Table 1 below summarizes the details of all surveys completed at the site.
Table 1. Summary of Surveys Completed at Waddell Ranch in Spring 2017
Date Personnel Survey Focus Hours2 Conditions
April 28 Kristen Nelson
Bob Hill
Preliminary site visit
Preliminary/incidental botanical and
wildlife species observations and
habitat assessment
2 Clear skies, calm,
80˚F
May 05 Kristen Nelson
Amy Golub
Botanical inventory
Vegetation community mapping
Habitat assessment
Incidental wildlife observations
10
100% overcast,
clearing to sunny,
calm, 73˚F
June 02 Kristen Nelson
Rhett Blanton
Botanical inventory
Vegetation community mapping
Habitat assessment
General wildlife survey
10 Clear skies, calm,
90˚F
June 09 Halden Petersen
General wildlife survey
Habitat assessment
Deploy camera traps (3)
7
100% overcast,
calm wind, drizzle,
63˚F
June 13 Kristen Nelson
Halden Petersen
General wildlife survey
Focused botanical survey and
habitat assessment
Re-locate camera traps (3)
2.5 Clear skies, calm
wind, 75˚F
June 14 Halden Petersen
General wildlife survey
Habitat assessment
Deploy acoustic bat detector
1.5 Clear skies, calm
wind, 65˚F
June 171
Kristen Nelson
Bob Hill
Brooke Langle
Botanical inventory and habitat
assessment – focused in northern
corner of property
3 Clear skies, calm,
98˚F
June 19 Halden Petersen
Rhett Blanton
General wildlife survey
Habitat assessment
Collect game cameras/bat detector
7 Clear skies, calm
wind, 85˚F
June 20 Brian Dugas
Amy Golub
Final late spring botanical and
wildlife surveys 2.5 Clear skies, calm
wind, 90˚F
1Additional, non-project-related experts were on site on June 17, for the specific purpose of documenting a newly-
discovered species of spineflower (Chorizanthe sp.) present on the property; see discussion below for details.
2Indicates number of hours spent on site, per person.
3
General wildlife surveys were completed by Terra Verde biologists Brian Dugas, Halden
Petersen, and Rhett Blanton over the course of six site visits on June 02, 09, 13, 14, 19, and 20.
All species observed directly and indirectly (e.g., sign such as tracks, scat, remains, etc.) were
documented. In addition, three game cameras and acoustic monitoring equipment for
detection of bats (Pettersson D500x) were deployed at the site. Game cameras were left to
collect data for a total of nine days and ten nights at five different locations (see Attachment B,
Figure 2). Acoustic bat monitoring equipment was used to collect data for a period of five nights
near the stock pond on site and data was analyzed using SonoBat US West (Szewczak).
Botanical surveys were completed by Terra Verde botanists Kristen Nelson and Amy Golub over
the course of five site visits between April 28 and June 20. An initial site visit was conducted on
April 28, during which incidental botanical, wildlife, and habitat observations were
documented. To the extent feasible, the entire Waddell Ranch property was accessed on foot
during the May 05 and June 02 surveys, to complete a botanical species inventory and
vegetation community mapping for the entire property. These surveys were timed to coincide
with the peak blooming and/or fruiting period for mid- and late spring blooming species.
Surveys completed on June 13 and 17 were focused entirely on the northern corner of the
property. To maximize the detectability of plants and wildlife that may inhabit areas of largely
impenetrable chaparral habitat, transects were made through the middle of the chaparral
communities on site, as well as along the edges, where there is greatest potential for unique
species to occur.
Botanical species identifications and taxonomic nomenclature followed The Jepson Manual:
Vascular Plants of California, 2nd edition (Baldwin et al., 2012) as well as taxonomic updates
provided in the Jepson eFlora (Jepson Flora Project, 2017). Vegetation community
classifications provided follow the second edition of A Manual of California Vegetation (MCV)
classification system (Sawyer et al., 2009) where applicable. Species profiles provided online
through the Consortium of North American Lichen Herbaria (CNALH, 2017) were referenced for
the identification of lichen species documented at the site.
Some plant species could not be identified to the species level due to the absence of diagnostic
morphological characters, resulting from absent/immature reproductive structures or seasonal
desiccation, which is required to make species-level determinations. In these cases ‘cf’
(=conforms to) is used in the species list to indicate provisional species identification based on
gestalt, vegetative morphology, and/or known range. When possible, all plant species in bloom
or otherwise recognizable were identified to the species or infraspecific level (i.e., subspecies,
variety). It is not expected that any of the provisional species identifications would be revised to
recognize a sensitive taxon. A complete list of botanical and wildlife species observed on site is
included as Attachment C.
4
Sufficiency of Biological Data
Weather conditions during each of the surveys were favorable for the detection of plants and
wildlife. However, several botanical and wildlife species that were not observed during the
surveys have potential to occur on site. Access constraints to certain portions of the property,
seasonal timing of the surveys, and/or annual variability in the phenology and presence of
annual-blooming species may have inhibited the detection of certain species.
In particular, a majority of the site is dominated by dense chaparral vegetation, which is often
impenetrable, thus limiting access to some areas. Additionally, chaparral is a fire-adapted
community, which often hosts numerous fire-following annual plant species. There is no
recorded fire history for the site (California Department of Forestry and Fire Protection [FRAP],
2017), and the habitat present on site is mature, without any evidence of recent fire or other
significant disturbance. If fire-following species are present at the site, they would likely not
have been detectable at the time of the surveys.
Wildlife Survey Results
A total of 74 invertebrate and vertebrate species were documented on the property, including
44 species not previously documented on the Reserve. Of particular note, at least 6 individual
California red-legged frogs (CRLF; Rana draytonii), a federally threatened species, were
observed during daytime surveys in the riparian and aquatic habitat, indicating a healthy
population of this species. All individuals observed were adults and sub-adults, likely also
indicating the presence of a breeding population. No non-native predators of CRLF (e.g.,
American bullfrog, freshwater bass) were observed on site. Additionally, two western pond
turtles (WPT; Actinemys marmorata), a California Species of Special Concern (CSC), were
observed near and within the stock pond. One individual was a hatchling, indicating successful
breeding of this species at the site as well. California Native Species Field Survey Forms were
completed and submitted to CNDDB for all special-status species observations, and are
included as Attachment D.
Many of the avian species observed were identified either within the riparian areas of the
northern portion of the property or near the stock pond, but the mosaic of open grasslands
mixed with shrub- and tree-dominated habitats provides highly suitable foraging and nesting
habitat for birds throughout the property.
Although there were no direct or indirect observations of large/predatory mammals (e.g.,
bobcat, mountain lion, black bear), there is potential for these species to occur in the area and
move through the Waddell Ranch property; mountain lions have been documented by the City
on an adjacent property.
5
Botanical Inventory and Vegetation Community Mapping Results
A total of 262 vascular plant taxa were documented on the property, of which 194 (74%) are
native, 68 are naturalized (26%), and 34 (13%) are considered invasive/noxious. In addition, 15
special-status (i.e., rare and endangered) taxa and 4 native lichens were identified. Habitats on
site are highly diverse, including a mosaic of open annual grasslands and meadows, serpentine
outcrops, dense chaparral, freshwater marsh/wetland, serpentine seep, willow scrub, and
mixed riparian woodlands (see Attachment B, Figure 2). Table 2 below provides a summary of
special-status species observation details and Figure 3 in Attachment B is a map of special-
status species observations.
Table 2. Occurrence details for special-status plant taxa observed
Species Listing
Status1
Estimated
Population Size2 Location(s) / Habitat3
Arctostaphylos obispoensis
Bishop manzanita CRPR 4.3 5
Found in two locations – north-facing
slope just south of Froom Creek and
south of the open meadow at southern
property boundary, in chaparral.
Calochortus clavatus var.
clavatus
Club-haired mariposa lily
CRPR 4.3 Several hundred
Abundant in open to dense scrub/
chaparral habitat on serpentine
outcrops.
Calochortus obispoensis
San Luis mariposa lily CRPR 1B.2 Several hundred
Abundant in open to dense scrub/
chaparral habitat on serpentine
outcrops.
Calystegia subacaulis subsp.
episcopalis
Cambria morning-glory
CRPR 4.2 Several hundred
Abundant in low-lying grassland
habitat at the center of the valley and
surrounding Froom Creek.
Carex obispoensis
San Luis Obispo sedge CRPR 1B.2 8-10 Along the banks of Froom Creek.
Castilleja densiflora subsp.
obispoensis
San Luis Obispo owl’s clover
CRPR 1B.2 100-200
Grassland / meadow opening within
chaparral, near southern property
boundary.
Chorizanthe breweri
Brewer’s spineflower CRPR 1B.3 Several thousand Abundant in open scrub habitat on
serpentine outcrops.
Chorizanthe palmeri
Palmer’s spineflower CRPR 4.2 Several hundred Abundant in open scrub habitat on
serpentine outcrops.
Chorizanthe sp.4 Not yet
listed5 150-200
Concentrated near ridge of serpentine
outcrop in northern property corner, in
openings of scrub/chaparral.
Dudleya abramsii subsp.
murina
Mouse-gray dudleya CRPR 1B.3 Several thousand
Abundant in open scrub habitat on
serpentine outcrops and adjacent
areas (including chaparral, grasslands,
seeps, oak woodland understory).
6
Species Listing
Status1
Estimated
Population Size2 Location(s) / Habitat3
Dudleya blochmaniae subsp.
blochmaniae
Blochman’s dudleya
CRPR 1B.1 <20
Concentrated on north-facing
serpentine outcrop just south of old
structures.
Lomatium parvifolium
Small-leaved lomatium CRPR 4.2 <50
Common in open scrub habitat on
serpentine outcrops and along the
edge of chaparral.
Monardella palmeri
Palmer’s monardella CRPR 1B.2 <50
Near seeps on the east-facing slope
west of the stock pond; chaparral
opening near the southern property
boundary.
Perideridia pringlei
Adobe yampah CRPR 4.3 Several hundred
Abundant in open to dense scrub/
chaparral habitat on serpentine
outcrops.
Sanicula hoffmannii
Hoffmann’s sanicle CRPR 4.3 15-20
Understory of oak woodland/ riparian
habitat along Froom Creek at the
western property boundary.
1Listing Status: Indicates listing status for rare and endangered (i.e., special-status) taxa. No state or federal-listed special-status
species were documented; taxa included on the California Rare Plant Rank (CRPR) are assigned listing status based on the degree
of rarity (Lists 1A through 4) and threat level (0.1, 0.2, and 0.3) (CNPS, 2017). Plants included on List 1B are considered rare,
threatened, or endangered in California and elsewhere; List 4 is a watch list of plants with limited distribution. Threat ranks are
defined as follows: 0.1- seriously threatened in California; 0.2- moderately threatened in California; 0.3- not very threatened in
California. See complete species list in Attachment C for more details on CRPR rankings.
2,3Population estimates and documentation of locations/habitats where special-status plants were observed are based on direct
observations of individuals and populations.
4,5Newly discovered species of Chorizanthe not yet published, and new species name not yet determined; expected to be
recommended for listing on the California Native Plant Society (CNPS) California Rare Plant Rank (CRPR) 1B.2 list.
Invasive and Noxious Species
In addition to documenting special-status taxa, occurrences of taxa included on the California
Invasive Plant Council (Cal-IPC) Invasive Plant Inventory (Inventory) (Cal-IPC, 2017); the U.S.
Department of Agriculture (USDA) state list of Introduced, Invasive, and Noxious Plants for
California (USDA, 2017); and/or the list of Invasive Weeds of San Luis Obispo County (SLO
County, 2017) were documented. The USDA uses a priority ranking system for noxious weeds
known to occur in California using an ‘A list’ (AW), ‘B list’ (BW), and a ‘C list’ (CW). The SLO
County list tracks species that are considered particularly problematic within the county, but
does not designate different ranking or priority levels. The Cal-IPC Inventory ranks species
based on their degree of invasiveness and ecological impacts, as follows:
Limited: invasive but with minor statewide ecological impacts, or insufficient
information to justify a higher score.
Moderate: substantial and apparent, but generally not severe ecological impacts on
physical processes, plant and animal communities, and vegetation structure.
7
High: severe ecological impacts on physical processes, plant and animal communities,
and vegetation structure.
A total of 34 taxa considered noxious or invasive were documented on the site. Invasive
rankings are indicated on the Botanical Species List, included in Attachment C.
Identification of a Novel Species
Serpentine habitats are well known to support a unique flora, including numerous rare,
endangered, and endemic species. Most of the special-status taxa listed in Table 2 above occur
within scrub and/or chaparral communities on serpentine outcrops. Of particular note, a
species of spineflower (Chorizanthe sp.), not previously known to science, was observed on the
serpentine outcrop and extending into adjacent chaparral habitat in the northern corner of the
property during the survey on June 02. Identification of the novel species was confirmed by Dr.
David J. Keil on June 15 (pers. comm., June 15, 2017), and a follow-up site visit was made on
June 17 to document the size and extent of the population, specific habitat characteristics, and
to make voucher collections for submittal to the Hoover Herbarium at California Polytechnic
State University, San Luis Obispo (Cal Poly). In addition to the project personnel listed in Table
1, Cal Poly botany professors Drs. Matt Ritter and Jenn Yost, as well as recent Cal Poly graduate
Kyle Nessen (photographer) participated in the site visit on June 17. The name for the new
species is currently under discussion by the authors. Once the name is decided, the new species
will be published in Madroño¸ the peer-reviewed journal of the California Botanical Society, and
likely recommended for listing on the California Rare Plant Rank (CRPR) 1B.2 list.
Vegetation Communities
The condition of habitats on site is relatively pristine, with ruderal, invasive, and noxious
species occurring at fairly low abundance, concentrated in the low-lying grassland habitats and
surrounding the remnant anthropogenic structures (i.e., dilapidated structures, historical rock
wall, ornamental tree stand). Nine unique vegetation communities were mapped on the
Waddell Ranch property, in addition to limited anthropogenic and/or ornamental areas. In
general, slope, aspect, elevation, and substrate dictate the distribution of communities
observed, but broad ecotones occur, where one community transitions widely into adjacent
communities. As such, the communities mapped in Figure 2 of Attachment B should not be
considered sharp transition lines between communities. Additionally, the community
descriptions provided below represent typical conditions, but a great deal of variability was
observed in each of these habitat types throughout the site. Representative site photos are
included as Attachment E.
8
Buck Brush/Leather Oak Chaparral
Chaparral is the dominant habitat type on the Waddell Ranch property, dominating the
higher elevation areas of the site. This community generally forms a closed-canopy of dense
shrub cover ranging from four to seven feet high. Dominants in this community include buck
brush (Ceanothus cuneatus var. ramulosus), leather oak (Quercus durata var. durata), and
chamise (Adenostoma fasciculatum var. fasciculatum), with toyon (Heteromeles arbutifolia),
black sage (Salvia mellifera), and chaparral yucca (Hesperoyucca whipplei) occurring at
variable density. Five individuals of Bishop manzanita (Arctostaphylos obispoensis), a CRPR
4.3 species, were found in association with this community.
This community assemblage closely corresponds to two communities described in MCV:
Ceanothus cuneatus Shrubland Alliance (buck brush chaparral) and Quercus durata
Shrubland Alliance (leather oak chaparral).
California Sagebrush-Black Sage Scrub
This community occurs in several areas on southwest-facing slopes, generally at mid-level
elevations between chaparral habitats and low-lying grassland or woodland communities.
California sagebrush (Artemisia californica) and black sage are co-dominant, with coyote
brush (Baccharis pilularis subsp. consanguinea), California coffee berry (Frangula
californica), chamise, and other species from the adjacent chaparral occurring at low cover.
This community composition most closely corresponds to the Artemisia californica-Salvia
mellifera Shrubland Alliance (California sagebrush-black sage scrub) in the MCV
classification system.
Yucca Scrub/Serpentine Outcrop
This community generally occurs as a marginal or transitional area in openings and at the
edges of chaparral and California sagebrush-black sage scrub. Chaparral yucca is the
dominant species in these areas, with golden-yarrow (Eriophyllum confertiflorum var.
confertiflorum) often occurring as a co-dominant, and various other chaparral and scrub
species occurring at low cover. This habitat tends to be very open, with large areas of
exposed, rocky outcrops and moderate cover of herbaceous and/or annual species. This
habitat is particularly suitable for most of the special-status taxa documented on site,
including the newly discovered species of spineflower. This habitat composition does not
correspond to any of the community assemblages identified in MCV.
Serpentine Seeps
Several perennial or nearly-perennial seeps were identified within the serpentine outcrops
on site. These areas are generally surrounded by areas of chaparral and scrub habitat, but
support a unique assemblage of plants due to the presence of perennial water. California
9
coffee berry forms variable shrub cover, with California lomatium (California lomatium) and
several species of rushes (Juncus spp.) and sedges (Carex spp.) dominating the herbaceous
cover. This unique habitat occurs in limited areas, and does not correspond to any of the
community assemblages identified in MCV.
Annual Grasslands and Meadows
The grassland habitat documented on site is highly variable, but is generally dominated by
non-native annual grass species, with variable cover of forbs and perennial grasses. Bromes
(Bromus spp.) are the dominant grasses in most areas, with oats (Avena spp.) and false
brome (Brachypodium distachyon) occurring as co-dominants. Non-native and invasive
forbs are generally concentrated in the low-lying areas adjacent to Froom Creek and the
remnant structures. In particular, fennel (Foeniculum vulgare), red brome (Bromus
madritensis subsp. rubens), and Himalayan blackberry (Rubus armeniacus), Cal-IPC rated
‘High’ species, were documented in these areas. Occasional openings in the chaparral
support grassland/meadow habitat that generally support a higher percent cover of native
grasses and forbs. The community composition documented for all grassland habitats on
site most closely corresponds to the Bromus (diandrus, hordeaceus)–Brachypodium
distachyon Semi-Natural Herbaceous Alliance (annual brome grassland) in the MCV
classification system.
Coast Live Oak / Mixed Riparian Woodland
Coast live oak (Quercus agrifolia) forms the dominant tree cover along Froom Creek and
adjacent, non-riparian woodland habitats. Arroyo willow (Salix lasiolepis) and California bay
(Umbellularia californica) occur as co-dominants in the tree canopy, with poison oak
(Toxicodendron diversilobum), pink honeysuckle (Lonicera hispidula), and blackberry (Rubus
spp.) forming a dense understory. This community assemblage most closely corresponds to
the Quercus agrifolia Woodland Alliance (coast live oak woodland) in the MCV classification
system.
Arroyo Willow Scrub
In addition to occurring as a characteristic component of the coast live oak woodland
habitat, arroyo willow is the dominant overstory species in the seasonal stream between
Froom Creek and the stock pond, and around the uphill (southern) margin of the pond .
Brewer’s willow (Salix breweri) occurs as a co-dominant in the dense overstory of this
stream, with a sparse understory occurring in limited areas where the tree canopy is less
dense. This community assemblage closely corresponds to the Salix lasiolepis Shrubland
Alliance (arroyo willow scrub) in the MCV classification system.
Cattail Marshes
10
Southern cattail (Typha domingensis) occurs as emergent vegetation in a dense band along
the northeastern and northwestern margins of the stock pond. Common spikerush
(Eleocharis macrostachya) and several species of rushes (Juncus spp.) occur as characteristic
components of this community. Although this community occurs in a very limited portion of
the site, it provides important foraging, cover, and nesting habitat for semi-aquatic reptiles,
amphibians, and birds that rely on the perennial water source of the stock pond. This
community composition closely corresponds to the Typha (angustifolia, domingensis,
latifolia) Herbaceous Alliance (cattail marshes) in the MCV classification system.
Coyote Brush Scrub
Coyote brush occurs as the dominant shrub cover in several marginal habitat areas,
including along the northern edge of the stock pond and lining the ephemeral drainages
that flow into the stock pond from the south. Arroyo willow, California blackberry (Rubus
ursinus), and California coffee berry occur at low cover in association with this community.
This community assemblage corresponds to the Baccharis pilularis Shrubland Alliance
(coyote brush scrub) in the MCV classification system.
In addition to these natural community assemblages, limited anthropogenic areas were
identified and mapped, including a cluster of several dilapidated structures, a historical rock
wall, and a stand of ornamental trees. The line of mature, ornamental trees is located along the
existing trail that runs roughly east-west near the northern corner of the property. Several
species of pines (Pinus spp.) and eucalypts (Eucalyptus spp.) were documented in this stand.
Aleppo pine (Pinus halepensis) has become naturalized in this area, with numerous saplings
observed, which appear to be establishing from seed set by one mature individual, located near
the western end of the line of trees. Red gum (Eucalyptus camaldulensis) and blue gum also
have the potential to become naturalized at the site, particularly within riparian areas. One blue
gum sapling was noted within the seasonal drainage that flows from the stock pond into Froom
Creek.
Management Considerations
The 154-acre Waddell Ranch property supports a diverse assemblage of unique species and
habitats. Purchase of this parcel by the City for permanent conservation within the Irish Hills
Natural Reserve was a critical acquisition for the protection of the distinctive resources present
on this property. To aid the City in amending the existing conservation plan for inclusion of the
Waddell Ranch and, in particular, for public recreational use, the following management
considerations are offered:
As feasible, improvements to stream crossings for pedestrian and/or vehicle use should
be implemented in the late summer to early fall when nesting bird activity, CRLF and
11
WPT dispersal, and water flow are minimal, to reduce the potential for impacts to these
species and their habitats. Similarly, demolition of existing structures and installation of
new structures should be timed to avoid seasonal impacts to riparian/aquatic habitats
and sensitive species.
The establishment or maintenance of trails at stream crossings should be planned to
avoid any downstream sedimentation or discharges of soil or other materials.
If feasible, conduct focused bat surveys to determine the presence/absence of roosts
within the old structures prior to demolition.
Vehicles, hand tools, and other equipment brought on site should be cleaned of all
soil/mud and other debris to avoid the spread of non-native or invasive plants to the site.
Remove saplings/volunteer sprouts of Aleppo pine, blue gum, and red gum, whenever
possible. Aleppo pine has already become naturalized within the ornamental stand of
trees near the northern corner of the property.
Establishment of new trails through dense shrub and/or tree habitat should avoid known,
occupied habitat for special-status plants, especially the newly described species of
spineflower, or such work should occur after the flowering and fruiting period for annual
special-status species populations that may be impacted.
If feasible, the City should search the Reserve for additional occurrences of the newly
described species of spineflower to further refine the known range for this species,
focusing on habitat similar to where it is currently known.
Where feasible, the establishment/improvement of trails should occur where remnant
trails/roads previously existed.
Install interpretive trail signs to inform the public of the sensitivity of resources present,
and important ways in which those resources can be protected (e.g., stay on trail, pack-
in/pack-out trash, don’t pick wildflowers, etc.).
These recommendations should be considered in the management of the Waddell Ranch
property to support public recreation and the persistence of pristine native habitats and diverse
species assemblages, including robust populations of special-status plant and wildlife
populations.
12
If you have any questions or require additional information, please contact me at
knelson@terraverdeweb.com or at (702) 596-5038.
Sincerely,
Kristen Nelson
Botanist
Attachments
A – References
B – Maps
Figure 1: 2-mile CNDDB Occurrences Map
Figure 2: Vegetation Communities Observed and Monitoring Equipment Locations
Figure 3: Sensitive Resources Observed
C – Botanical and Wildlife Species Lists for Waddell Ranch
D – CNDDB Forms for Special-status Species Observations
E – Representative Site Photographs
ATTACHMENT A - References
Baldwin, Bruce G., D.H. Goldman, D.J. Keil, R. Patterson, T.J. Rosatti, and D.H. Wilken. The
Jepson Manual: Vascular Plants of California, Second Edition. 2012. University of
California Press. Berkeley, California.
California Department of Fish and Wildlife (CDFW), 2017. California Natural Diversity Database:
RareFind 5. Accessible online with subscription at:
http://www.dfg.ca.gov/biogeodata/cnddb/mapsanddata.asp. Accessed April, June 2017.
California Department of Forestry and Fire Protection (FRAP). 2017. FRAP Mapping.
http://frap.fire.ca.gov/data/frapgisdata-sw-fireperimeters_download. Accessed June
2017).
California Invasive Plant Council (Cal-IPC). 2017. California Invasive Plant Inventory. Available
online at: http://cal-ipc.org/. Accessed April, June 2017.
California Native Plant Society (CNPS), 2017. Online Inventory of Rare and Endangered Plants.
Sacramento, California. Available Online at: http://www.rareplants.cnps.org/. Accessed
April, June 2017.
City of San Luis Obispo (City) Natural Resources Program. 2011. Irish Hills Natural Reserve
Conservation Plan Update.
Consortium of California Herbaria (CCH). 2017. Regents of the University of California. Available
online at: http://ucjeps.berkeley.edu/consortium/. Accessed April, June 2017.
Consortium of North American Lichen Herbaria (CNALH). 2017. Available online at:
http//:lichenportal.org/portal/index.php. Accessed on June 2017.
Jepson eFlora. 2017. Regents of the University of California. Available online at:
http://ucjeps.berkeley.edu/eflora/. Accessed April, June 2017.
San Luis Obispo County. 2017. List of Invasive Weeds of SLO County. Available online at:
http://www.slocounty.ca.gov/agcomm/Weed_Control/SLO_County_s_Weed_Managem
ent_Area/Invasive_Weeds_of_SLO_County.htm. Accessed June 2017.
Sawyer, John O.; Keeler-Wolf, Todd; and Evens, Julie M. 2009. A Manual of California
Vegetation, Second Edition. California Native Plant Society Press: Sacramento,
California.
United States Department of Agriculture (USDA) Natural Resources Conservation Service. 2017.
List of California State-listed Noxious Weeds. Available online at:
https://plants.usda.gov/java/noxious?rptType=State&statefips=06 . Accessed June 2017.
This page intentionally left blank.
ATTACHMENT B - Figures
Figure 1: 2-mile CNDDB Occurrences Map
Figure 2: Vegetation Communities Observed and Monitoring Equipment Locations
Figure 3: Sensitive Resources Observed
This page intentionally left blank.
^_WPT
WPT
Brewer'sSpineflower
SLO owl's-clover
Mouse-gray Dudleya
Pecho Manzanita
Hoover'sButton-celery
Congdon'sTarplant
SLO Sedge
SLO Owl's-cloverSLO FountainThistle
SLO FountainThistle
SLO FountainThistle
Mouse-gray Dudleya
Congdon'sTarplantSL Mariposa-lily
Monarch
AMBA
SH
AMBA
CRLF
WPT
FEHA
Jones' layia
Dwarf Soaproot
Brewer'sSpineflower
Hoover'sButton-celery Jones' LayiaSLO Sedge
Mesa Horkelia
Hoover's Bent Grass
Pecho Manzanita
SLO Owl's-clover
Mouse-grayDudleya
Pecho manzanita
SLO FountainThistle
Brewer'sSpineflower
SLO Owl's-clover
La PanzaMariposa-lilySL Mariposa-lily
Cambria Morning-glory
SL Mariposa-lily
Blochman's dudleyaSLO Owl's-clover
SLO FountainThistle
Congdon'sTarplant
Brewer's spineflower
SL Mariposa-lily
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS,
USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS
User Community
¯
Waddell Ranch Biological Resources AssessmentCity of San Luis Obispo
0 10.5
Miles
^_Approximate Property CenterPlants
Blochman's Dudleya
Brewer's Spineflower
Cambria Morning-glory
Congdon's Tarplant
Dwarf Soaproot
Hoover's Bent Grass
Hoover's Button-celery
Jones' Layia
La Panza Mariposa Lily
Mesa Horkelia
Mouse-gray Dudleya
Pecho Manzanita
San Luis Obispo (SLO) Fountain Thistle
San Luis Obispo (SLO) Owl's-clover
San Luis Obispo (SLO) Sedge
San Luis (SL) Mariposa Lily
Wildlife
American Badger (AMBA)
California Red-legged Frog (CRLF)
Ferruginous Hawk (FEHA)
Monarch Butterfly
Steelhead (SH)
Western Pond Turtle (WPT)
Figure 1: 2-mile CNDDB Occurrences MapStream data: USGS in cooperation w/USEPA, 2003; accessed June 2017.
GF
GF GF
GF
GF
GF
Froom Creek
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS,
USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS
User Community
¯
Waddell Ranch Biological Resources AssessmentCity of San Luis Obispo
0 1,000500
Feet
Approximate Property Boundary
Existing Roads/Trails
USGS Blue Line Stream
GF Acoustic Bat Detector Station
GF Camera Trap Station
Vegetation Communities
Anthropogenic/Ornamental
CA Sagebrush-Black Sage Scrub
Cattail Marsh
Chaparral
Coast Live Oak/Mixed Riparian Woodland
Coyote Brush Scrub
Grassland
Open Water/Pond
Serpentine Outcrop/Yucca Scrub
Willow Scrub
Figure 2: Vegetation Communities Observed& Monitoring Equipment Locations
!(
!(
kj
kj
kj
kj
kj
kj
Froom Creek
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS,
USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS
User Community
¯
Waddell Ranch Biological Resources AssessmentCity of San Luis Obispo
0 1,000500
Feet
Approx. Property Boundary
USGS Blue Line Stream
kj Serpentine Seep
Special-status Plant Observations
New Chorizanthe Species
Serpentine Outcrop
- Adobe Yampah
- Brewer's Spineflower
- Club-haired Mariposa Lily
- Mouse-gray Dudleya
- Palmer's Spineflower
- San Luis Mariposa Lily
- Small-leaved Lomatium
Bishop Manzanita
Blochman's Dudleya
Cambria Morning-glory
Hoffmann's Sanicle
Palmer's Monardella
San Luis Obispo Sedge
San Luis Obispo Owl's-cloverSpecial-status Wildlife Observations
CA Red-legged Frog
!(Western Pond Turtle
Figure 3: Sensitive ResourcesObserved
Stream data: USGS in cooperation w/USEPA, 2003; accessed June 2017.
ATTACHMENT C - Botanical and Wildlife Species Lists for Waddell Ranch
This page intentionally left blank.
Botanical Species List for Waddell Ranch (Addition to Irish Hills Natural Reserve)
Observed by Terra Verde on April 28, May 05, and June 02, 13, 17, and 20, 2017
Family Scientific Name Common Name Listing
Status1 Origin
Vascular Plants
Adoxaceae,
Muskroot Family
Sambucus nigra subsp.
caerulea Blue elderberry -- Native
Agavaceae, Century
Plant Family
Chlorogalum pomeridianum
var. pomeridianum Soap plant -- Native
Hesperoyucca whipplei Chaparral yucca -- Native
Alliaceae,
Onion Family
Allium haematochiton Redskin onion -- Native
Allium lacunosum var.
lacunosum Pitted onion -- Native
Allium sativum Garlic -- Naturalized
(waif)
Anacardiaceae,
Sumac Family Toxicodendron diversilobum Western poison oak -- Native
Apiaceae,
Carrot Family
Apiastrum angustifolium Wild celery -- Native
Conium maculatum Poison hemlock Mod/-/SLO Naturalized
Daucus pusillus American wild carrot -- Native
Foeniculum vulgare Fennel High/-/SLO Naturalized
Lomatium californicum California lomatium -- Native
Lomatium caruifolium Alkali parsley -- Native
Lomatium dasycarpum
subsp. dasycarpum
Woolly fruited
lomatium -- Native
Lomatium parvifolium Small-leaved lomatium CRPR 4.2 Native
Lomatium utriculatum Common lomatium -- Native
Perideridia pringlei Adobe yampah CRPR 4.3 Native
Sanicula arguta Sharp toothed sanicle -- Native
Sanicula crassicaulis Gamble weed -- Native
Sanicula hoffmannii Hoffmann's sanicle CRPR 4.3 Native
Scandix pecten-veneris Venus' needle -- Naturalized
Torilis arvensis Tall sock-destroyer Mod/-/- Naturalized
Apocynaceae,
Dogbane Family Asclepias fascicularis Narrow-leaf milkweed -- Native
Asteraceae,
Sunflower Family
Achillea millefolium Common yarrow -- Native
Achyrachaena mollis Soft blow wives -- Native
Agoseris grandiflora var.
grandiflora
Giant mountain
dandelion -- Native
Family Scientific Name Common Name Listing
Status1 Origin
Asteraceae,
Sunflower Family
(cont.)
Agoseris heterophylla
Annual mountain
dandelion -- Native
Anthemis cotula Mayweed -- Naturalized
Artemisia californica California sagebrush -- Native
Artemisia douglasiana Mugwort -- Native
Baccharis pilularis subsp.
consanguinea Coyote brush -- Native
Carduus pycnocephalus Italian thistle
Mod/CW/
SLO Naturalized
Centaurea melitensis Maltese star-thistle Mod/-/SLO Naturalized
Cirsium vulgare Bull thistle Mod/-/SLO Naturalized
Corethrogyne filaginifolia Common sandaster -- Native
Erigeron philadelphicus var.
philadelphicus Philadelphia fleabane -- Native
Eriophyllum confertiflorum
var. confertiflorum Golden-yarrow -- Native
Eurybia radulina Roughleaf aster -- Native
Gamochaeta ustulata Featherweed -- Native
Grindelia hirsutula Hairy gumweed -- Native
Hazardia squarrosa
Saw-toothed
goldenbush -- Native
Hemizonia congesta subsp.
luzulifolia Hayfield tarweed -- Native
Hesperevax sparsiflora var.
sparsiflora Erect dwarf cudweed -- Native
Hypochaeris glabra Smooth cat's ear Lim/-/- Naturalized
Lactuca serriola Prickly lettuce -- Naturalized
Lagophylla ramosissima Common hareleaf -- Native
Lasthenia gracilis Common goldfields -- Native
Logfia filaginoides California cottonrose -- Native
Logfia gallica Daggerleaf cottonrose -- Naturalized
Madia exigua Little tarweed -- Native
Madia gracilis Gumweed -- Native
Microseris douglasii subsp.
douglasii Douglas' silverpuffs -- Native
Pseudognaphalium
californicum Ladies' tobacco -- Native
Pseudognaphalium
luteoalbum Jersey cudweed -- Naturalized
Family Scientific Name Common Name Listing
Status1 Origin
Asteraceae,
Sunflower Family
(cont.)
Pseudognaphalium
stramineum Cottonbatting plant -- Native
Psilocarphus tenellus Slender woolly-marbles -- Native
Soliva sessilis Field burrweed -- Naturalized
Sonchus asper subsp. asper Prickly sow thistle -- Naturalized
Sonchus oleraceus Common sow thistle -- Naturalized
Stephanomeria cichoriacea Silver rock-lettuce -- Native
Stephanomeria cf2 exigua Wire lettuce -- Native
Symphyotrichum chilense California aster -- Native
Uropappus lindleyi Silver puffs -- Native
Blechnaceae,
Deer Fern Family Woodwardia fimbriata Giant chain fern -- Native
Boraginaceae,
Borage Family
Cryptantha clevelandii var.
florosa Coastal cryptantha -- Native
Cryptantha microstachys Tejon cryptantha -- Native
Phacelia imbricata var.
imbricata Imbricate phacelia -- Native
Brassicaceae,
Mustard Family
Streptanthus glandulosus
subsp. glandulosus Bristly jewelflower -- Native
Cactaceae,
Cactus Family Opuntia ficus-indica Mission prickly-pear -- Naturalized
Caprifoliaceae,
Honeysuckle Family
Lonicera hispidula Pink honeysuckle -- Native
Symphoricarpos mollis Creeping snowberry -- Native
Caryophyllaceae,
Pink Family Cerastium glomeratum
Sticky mouse-ear
chickweed -- Naturalized
Sagina apetala Dwarf pearlwort -- Native
Silene antirrhina Sleepy catchfly -- Native
Silene gallica Windmill pink -- Naturalized
Silene laciniata subsp.
laciniata Mexican pink -- Native
Stellaria media Common chickweed -- Naturalized
Convolvulaceae,
Morning-glory
Family
Calystegia macrostegia
subsp. cyclostegia Coast morning glory -- Native
Calystegia subacaulis subsp.
episcopalis Cambria morning-glory CRPR 4.2 Native
Convolvulus arvensis Bindweed -/CW/- Naturalized
Cornaceae,
Dogwood Family
Cornus sericea subsp.
occidentalis Western dogwood -- Native
Family Scientific Name Common Name Listing
Status1 Origin
Crassulaceae,
Stonecrop Family
Crassula connata Pygmy-weed -- Native
Crassula tillaea
Mediterranean pygmy-
weed -- Naturalized
Dudleya abramsii subsp.
murina Mouse-gray dudleya CRPR 1B.3 Native
Dudleya blochmaniae
subsp. blochmaniae Blochman's dudleya CRPR 1B.1 Native
Dudleya lanceolata Lance-leaved dudleya -- Native
Cyperaceae,
Sedge Family
Carex obispoensis San Luis Obispo sedge CRPR 1B.2 Native
Carex serratodens Saw-toothed sedge -- Native
Carex spissa San Diego sedge -- Native
Carex tumulicola Foothill sedge -- Native
Cyperus eragrostis Tall flatsedge -- Native
Eleocharis macrostachya Common spikerush -- Native
Scirpus microcarpus Panicled bulrush -- Native
Dennstaedtiaceae,
Bracken Family
Pteridium aquilinum var.
pubescens Western bracken fern -- Native
Dryopteridaceae,
Wood Fern Family Dryopteris arguta California wood fern -- Native
Equisetaceae,
Horsetail Family Equisetum arvense Common horsetail -- Native
Ericaceae,
Heath Family Arctostaphylos obispoensis Bishop manzanita CRPR 4.3 Native
Euphorbiaceae,
Spurge Family Euphorbia spathulata Warty spurge -- Native
Fabaceae,
Legume Family
Acmispon americanus var.
americanus Spanish lotus -- Native
Acmispon brachycarpus Short podded lotus -- Native
Acmispon glaber var. glaber Deerweed -- Native
Acmispon junceus var.
junceus Rush lotus -- Native
Acmispon wrangelianus Chilean trefoil -- Native
Lathyrus vestitus var.
vestitus Common pacific pea -- Native
Lotus corniculatus Bird's-foot trefoil -- Naturalized
Lupinus bicolor Miniature lupine -- Native
Lupinus succulentus Arroyo lupine -- Native
Medicago polymorpha California burclover Lim/-/- Naturalized
Family Scientific Name Common Name Listing
Status1 Origin
Fabaceae,
Legume Family
(cont.)
Melilotus indicus Sourclover -- Naturalized
Pickeringia montana var.
montana Chaparral pea -- Native
Thermopsis macrophylla Santa Ynez false lupine -- Native
Trifolium albopurpureum Rancheria clover -- Native
Trifolium ciliolatum Foothill clover -- Native
Trifolium depauperatum
var. truncatum Truncate sack clover -- Native
Trifolium dubium Little hop clover -- Naturalized
Trifolium fucatum Bull clover -- Native
Trifolium hirtum Rose clover Lim/-/- Naturalized
Trifolium microcephalum Small-head clover -- Native
Vicia sativa Spring vetch -- Naturalized
Vicia villosa Hairy vetch -- Naturalized
Fagaceae,
Oak Family
Quercus agrifolia var.
agrifolia Coast live oak -- Native
Quercus durata var. durata Leather oak -- Native
Gentianaceae,
Gentian Family Zeltnera davyi Davy's centaury -- Native
Geraniaceae,
Geranium Family
Erodium botrys Big heron bill -- Naturalized
Erodium brachycarpum Foothill filaree -- Naturalized
Erodium cicutarium Redstem filaree Lim/-/- Naturalized
Geranium dissectum Cut leaved geranium Lim/-/- Naturalized
Geranium molle Crane's bill geranium -- Naturalized
Iridaceae,
Iris Family Sisyrinchium bellum
Western blue-eyed-
grass -- Native
Juncaceae,
Rush Family
Juncus bufonius Toad rush -- Native
Juncus phaeocephalus var.
phaeocephalus Brownheaded rush -- Native
Juncus patens Spreading rush -- Native
Juncus tenuis Slender rush -- Native
Juncus xiphioides Iris-leaved rush -- Native
Lamiaceae,
Mint Family
Clinopodium douglasii Yerba buena -- Native
Mentha pulegium Pennyroyal -- Naturalized
Monardella palmeri Palmer's monardella CRPR 1B.2 Native
Salvia columbariae Chia -- Native
Lamiaceae,
Mint Family (cont.)
Salvia mellifera Black sage -- Native
Salvia spathacea Hummingbird sage -- Native
Stachys bullata California hedge nettle -- Native
Family Scientific Name Common Name Listing
Status1 Origin
Lauraceae,
Laurel Family Umbellularia californica California bay -- Native
Liliaceae,
Lily Family
Calochortus albus Fairy-lantern -- Native
Calochortus argillosus Clay mariposa lily -- Native
Calochortus clavatus var.
clavatus
Club-haired mariposa
lily CRPR 4.3 Native
Calochortus obispoensis San Luis mariposa lily CRPR 1B.2 Native
Fritillaria biflora var. biflora Chocolate lily -- Native
Linaceae,
Flax Family Hesperolinon micranthum Common dwarf flax -- Native
Lythraceae,
Loosestrife Family Lythrum hyssopifolia Hyssop loosestrife -- Naturalized
Malvaceae,
Mallow Family Sidalcea malviflora Checkermallow -- Native
Melanthiaceae,
False-hellebore
Family Toxicoscordion cf fremontii Death camas
--
Native
Montiaceae,
Miner's Lettuce
Family
Calandrinia menziesii Red maids -- Native
Claytonia exigua Serpentine springbeaty -- Native
Claytonia parviflora
Narrow leaved miner's
lettuce -- Native
Claytonia perfoliata Miner's lettuce -- Native
Myrsinaceae,
Myrsine Family Lysimachia arvensis Scarlet pimpernel -- Naturalized
Myrtaceae,
Myrtle Family
Eucalyptus camaldulensis Red gum Lim/-/- Naturalized
Eucalyptus globulus Blue gum Lim/-/- Naturalized
Onagraceae,
Evening-primrose
Family
Clarkia bottae Punchbowl godetia -- Native
Epilobium brachycarpum Annual fireweed -- Native
Epilobium ciliatum subsp.
ciliatum Fringed willowherb -- Native
Orobanchaceae,
Broomrape Family
Bellardia trixago Mediterranean linseed Lim/-/- Naturalized
Castilleja attenuata Valley tassels -- Native
Castilleja densiflora subsp.
gracilis Graceful owl's clover -- Native
Castilleja densiflora subsp.
obispoensis
San Luis Obispo owl's
clover CRPR 1B.2 Native
Castilleja exserta subsp.
exserta Purple owl's clover -- Native
Family Scientific Name Common Name Listing
Status1 Origin
Orobanchaceae,
Broomrape Family
(cont.)
Castilleja miniata subsp.
miniata
Scarlet Indian
paintbrush -- Native
Cordylanthus rigidus subsp.
rigidus Rigid bird's beak -- Native
Triphysaria eriantha Butter-and-eggs -- Native
Papaveraceae,
Poppy Family
Dendromecon rigida Bush poppy -- Native
Eschscholzia californica California poppy -- Native
Phrymaceae,
Lopseed Family
Diplacus aurantiacus Bush monkeyflower -- Native
Erythranthe guttata
Common
monkeyflower -- Native
Erythranthe microphylla
Small-leaved
monkeyflower -- Native
Pinaceae,
Pine Family
Pinus canariensis Canary Island pine -- Naturalized
Pinus eldarica Mondell pine -- Naturalized
Pinus halepensis Aleppo pine -- Naturalized
Pinus muricata Bishop pine -- Native
(ornamental)
Pinus pinea Stone pine -- Naturalized
Pinus radiata Monterey pine -- Native
(ornamental)
Plantaginaceae,
Plantain Family
Antirrhinum kelloggii Climbing snapdragon -- Native
Collinsia heterophylla var.
heterophylla Chinese-houses -- Native
Plantago erecta California plantain -- Native
Plantago lanceolata English plantain Lim/-/- Naturalized
Platanaceae Platanus racemosa Western sycamore -- Native
Poaceae,
Grass Family
Agrostis exarata Spike bent grass -- Native
Aira caryophyllea Silver hair grass -- Native
Avena barbata Slender wild oat Mod/-/- Naturalized
Avena fatua Wild oat Mod/-/- Naturalized
Brachypodium distachyon False brome Mod/-/- Naturalized
Briza minor Annual quaking grass -- Naturalized
Bromus diandrus Ripgut grass Mod/-/- Naturalized
Bromus hordeaceus Soft chess Lim/-/- Naturalized
Bromus madritensis subsp.
rubens Red brome High/-/- Naturalized
Cynodon dactylon Bermuda grass Mod/-/- Naturalized
Dactylis glomerata Orchard grass Lim/-/- Naturalized
Danthonia californica California oat grass -- Native
Family Scientific Name Common Name Listing
Status1 Origin
Poaceae,
Grass Family (cont.)
Deschampsia danthonioides Annual hair grass -- Native
Elymus condensatus Giant wild-rye -- Native
Elymus glaucus subsp.
glaucus Blue wild-rye -- Native
Elymus multisetus Big squirreltail -- Native
Festuca microstachys Small fescue -- Native
Festuca myuros Rattail sixweeks grass Mod/-/- Naturalized
Festuca perennis Rye grass Mod/-/- Naturalized
Gastridium phleoides Nit grass -- Naturalized
Hordeum brachyantherum Meadow barley -- Native
Hordeum marinum subsp.
gussoneanum Mediterranean barley Mod/-/- Naturalized
Hordeum murinum Wall barley Mod/-/- Naturalized
Koeleria macrantha June grass -- Native
Melica imperfecta Little California melica -- Native
Poa secunda subsp.
secunda One-sided blue grass -- Native
Polypogon interruptus Ditch beard grass -- Naturalized
Polypogon monspeliensis Rabbitfoot grass Lim/-/- Naturalized
Schismus arabicus Mediterranean grass Lim/-/- Naturalized
Stipa lepida Foothill needle grass -- Native
Stipa pulchra Purple needle grass -- Native
Polemoniaceae,
Phlox Family
Gilia achilleifolia subsp.
achilleifolia California gilia -- Native
Gilia achilleifolia subsp.
multicaulis
Many stemmed
California gilia -- Native
Leptosiphon parviflorus Variable linanthus -- Native
Navarretia squarrosa Skunkweed -- Native
Polygonaceae,
Buckwheat Family
Chorizanthe breweri Brewer's spineflower CRPR 1B.3 Native
Chorizanthe obovata
Spoon-sepal
spineflower -- Native
Chorizanthe palmeri Palmer's spineflower CRPR 4.2 Native
Chorizanthe sp. [NEW] -- Pending3 Native
Eriogonum elongatum var.
elongatum
Long-stem wild
buckwheat -- Native
Persicaria amphibia Water smartweed -- Native
Pterostegia drymarioides Fairy mist -- Native
Rumex acetosella Sheep sorrel Mod/-/- Naturalized
Rumex conglomeratus Clustered dock -- Naturalized
Family Scientific Name Common Name Listing
Status1 Origin
Polygonaceae,
Buckwheat Family
(cont.)
Rumex crispus Curly dock Lim/-/- Naturalized
Rumex pulcher Fiddle dock -- Naturalized
Polypodiaceae,
Polypody Family Polypodium californicum California polypody -- Native
Potamogetonaceae,
Pondweed Family
Potamogeton cf
diversifolius
Diverse-leaved
pondweed -- Native
Primulaceae,
Primrose Family Primula clevelandii Padre's shooting star -- Native
Pteridaceae,
Brake Family
Pellaea andromedifolia Coffee fern -- Native
Pentagramma triangularis Goldback fern -- Native
Ranunculaceae,
Buttercup Family
Aquilegia eximia Serpentine columbine -- Native
Delphinium hesperium
subsp. hesperium Western larkspur -- Native
Ranunculus californicus var.
californicus California buttercup -- Native
Rhamnaceae,
Buckthorn Family
Ceanothus cuneatus var.
ramulosus Buck brush -- Native
Ceanothus rigidus Monterey ceanothus -- Native
Frangula californica California coffee berry -- Native
Rosaceae,
Rose Family
Adenostoma fasciculatum
var. fasciculatum Chamise -- Native
Heteromeles arbutifolia Toyon -- Native
Pyracantha koidzumii Taiwan firethorn -- Naturalized
Rosa californica California rose -- Native
Rubus armeniacus Himalayan blackberry High/-/- Naturalized
Rubus ursinus California blackberry -- Native
Rubiaceae,
Madder Family
Galium aparine Goose grass -- Native
Galium californicum California bedstraw -- Native
Galium porrigens var.
porrigens Climbing bedstraw -- Native
Salicaceae,
Willow Family
Salix breweri Brewer's willow -- Native
Salix lasiolepis Arroyo willow -- Native
Scrophulariaceae,
Figwort Family Scrophularia californica California figwort -- Native
Solanaceae,
Nightshade Family
Solanum douglasii Douglas' nightshade -- Native
Solanum umbelliferum Blue witch nightshade -- Native
Family Scientific Name Common Name Listing
Status1 Origin
Themidaceae,
Brodiaea Family
Bloomeria crocea var.
crocea Common goldenstar -- Native
Dichelostemma capitatum
subsp. capitatum Blue dicks -- Native
Typhaceae,
Cattail Family Typha domingensis Southern cattail -- Native
Verbenaceae,
Vervain Family Verbena lasiostachys Vervain -- Native
Violaceae,
Violet Family Viola pedunculata Johnny-jump-up -- Native
Viscaceae,
Mistletoe Family
Phoradendron leucarpum
subsp. macrophyllum Big leaf mistletoe -- Native
Lichens
Parmeliaceae Evernia prunastri Oakmoss lichen -- Native
Flavopunctelia caperata
Common greenshield
lichen -- Native
Ramalinaceae Ramalina menziesii Lace lichen -- Native
Teloschistaceae Teloschistes exilis Slender orange-bush -- Native
1Listing Status: Indicates listing status for rare and endangered (i.e., special-status) taxa, as well as taxa considered noxious/invasive weeds
in California and San Luis Obispo County. No state or federal-listed special-status species were documented; taxa included on the California
Rare Plant Rank (CRPR) are assigned listing status based on the degree of rarity (Lists 1A through 4) and threat level (0.1, 0.2, and 0.3), as
follows (CNPS, 2017):
Rarity Ranks:
List 1A: presumed extirpated in California, and rare or extinct elsewhere
List 1B: rare, threatened, or endangered in California and elsewhere
List 2A: presumed extirpated in California, but more common elsewhere
List 2B: rare, threatened, or endangered in California, but more common elsewhere
List 3: review list of plants about which more information is needed
List 4: watch list of plants with limited distribution
Threat Ranks:
0.1: seriously threatened in California (> 80% threatened / high degree and immediacy of threat)
0.2: moderately threatened in California (20-80% threatened / moderate degree and immediacy of threat)
0.3: not very threatened in California (< 20% threatened / low degree and immediacy or no current threats known)
Taxa included on the California Invasive Plant Council (Cal-IPC) Invasive Plant Inventory (Cal-IPC, 2017); the U.S. Department of
Agriculture (USDA) state list of Introduced, Invasive, and Noxious Plants for California (USDA, 2017); and/or the list of Invasive Weeds of
San Luis Obispo County (SLO County, 2017) are indicated above in order of: Cal-IPC rank / USDA rank / SLO County list. The USDA ranking
‘CW’ refers to a ‘C list’ of noxious weeds known to occur in California. The SLO County list does not designate different ranking levels; any
species included on the SLO County list is considered particularly problematic within the county, and is indicated above with --/--/SLO.
Cal-IPC rankings included on this list are defined as:
Cal-IPC Inventory:
Limited (Lim): invasive but with minor statewide ecological impacts, or insufficient information to justify a higher score.
Moderate (Mod): substantial and apparent, but generally not severe ecological impacts on physical processes, plant and animal
communities, and vegetation structure.
High: severe ecological impacts on physical processes, plant and animal communities, and vegetation structure.
2 ‘cf’ (=conforms to): indicates provisional species determination based on the observed pheno-phase, but in the absence of diagnostic
features.
3Final species name pending; will be recommended for inclusion on the CRPR 1B.2 list when published.
Wildlife Species List for Waddell Ranch (Addition to Irish Hills Natural Reserve)
Observed by Terra Verde on June 02, 09, 13, 14, 19 and 20, 2017
Order Scientific Name Common Name Listing Status
Federal/State
Amphibians
Pseudacris regilla Pacific treefrog -
Rana draytonii California red-legged frog FT/CSC
Birds
Agelaius phoeniceus Red-winged blackbird -
Aphelocoma californica Western scrub-jay -
Baeolophus inornatus Oak titmouse -
Buteo jamaicensis Red-tailed hawk -
Callipepla californica California quail -
Calypte anna Anna's hummingbird -
Carpodacus mexicanus House finch -
Cathartes aura Turkey vulture -
Chamaea fasciata Wrentit -
Chondestes grammacus Lark sparrow -
Colaptes auratus Northern flicker -
Cyanocitta stelleri Steller's jay -
Empidonax difficilis Pacific-slope flycatcher -
Euphagus cyanocephalus Brewer's blackbird -
Falco sparverius American kestrel -
Junco hyemalis Dark-eyed junco -
Melanerpes formicivorus Acorn woodpecker -
Myiarchus cinerascens Ash-throated flycatcher -
Phalaenoptilus nuttallii Common poorwill -
Pheucticus melanocephalus Black-headed grosbeak -
Picoides nuttallii Nuttall's woodpecker -
Pipilo maculatus Spotted towhee -
Poecile rufescens Chestnut-backed chickadee -
Polioptila caerulea Blue-gray gnatcatcher -
Psaltriparus minimus Bushtit -
Sayornis nigricans Black phoebe -
Selasphorus rufus Rufous hummingbird -
Sialia mexicana Western bluebird -
Tachycineta bicolor Tree swallow -
Tachycineta thalassina Violet-green swallow -
Thryomanes bewickii Bewick's wren -
Toxostoma redivivum California thrasher -
Troglodytes aedon House wren -
Tyrannus verticalis Western kingbird -
Vireo gilvus Warbling vireo -
Birds (cont.)
Vireo huttoni Hutton's vireo -
Wilsonia pusilla Wilson's warbler -
Zenaida macroura Mourning dove -
Invertebrates
Acrididae Locust
Araneidae (Order) Orb weaver
Argia lugens Sooty dancer
Bombus sp. Bumble bee
Corixidae (Order) Water boatman
Danaus plexippus Monarch butterfly -/Special Animal
Eleodes dentipes Dentate stink beetle
Gerridae (Order) Water striders
Libellula saturata Flame skimmer
Lithobiomorpha (Order) Stone centipede
Papilio rutulus Western tiger swallowtail
Plathemis lydia Common whitetail
Simuliidae Black fly
Mammals Canis latrans Coyote -
* Corynorhinus townsendii Townsend's big-eared bat -/CSC & CT
* Eptesicus fuscus Big brown bat -
* Lasionycteris noctivagans Silver-haired bat -
* Lasiurus cinereus Hoary bat -
** Neotoma sp. Woodrat Potential CSC
Odocoileus hemionus columbianus Columbian black-tailed deer -
* Myotis thysanodes Fringed myotis -
* Myotis yumanensis Yuma myotis -
* Parastrellus hesperus Canyon bat -
Sylvilagus audubonii Desert cottontail -
Sylvilagus bachmani Brush rabbit -
* Tadarida brasiliensis Brazilian free-tailed bat -
Thomomys bottae Botta's pocket gopher -
Reptiles Actinemys marmorata Western pond turtle -/CSC
Aspidoscelis tigris munda California whiptail -
Coluber lateralis lateralis California striped racer -
Elgaria multicarinata Southern alligator lizard -
Pituophis catenifer Gopher snake -
Sceloporus occidentalis Western fence lizard -
Thamnophis elegans terrestris Coast gartersnake -
* Bat species were identified with a high degree of certainty using SonoBat identification software.
**Potential for Monterey dusky-footed woodrat (Neotoma macrotis luciana) to occur, but presence not confirmed.
ATTACHMENT D – CNDDB Field Survey Forms
This page intentionally left blank.
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Rana draytonii
California red-legged frog
6
Rhett Blanton
3765 South Higuera Street, Suite 102
San Luis Obispo, CA 93401
rblanton@terraverdeweb.com
(805) 458-3451
2 4
Habitat consisted of riparian corridoor with nearly complete willow and coast live oak canopy cover. Understory herbaceous vegetation
included horsetail, posoin oak, and bunchgrass. Substrate primarily bedrock with cobble. Stream structure includes pools and shallow riffle.
San Luis Obispo City of San Luis Obispo
San Luis Obispo 783
Google Earth
35 degrees 15' 1.71" N
-120 degrees 43' 5.52" W
Adult and subadult frogs observed sunning on algal mat and drainage banks.
Open space
None
None
Halden Petersen
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06/02/2017
Actinemys marmorata
Western pond turtle
2
Rhett Blanton
3765 South Higuera Street, Suite 102
San Luis Obispo, CA 93401
rblanton@terraverdeweb.com
(805) 458-3451
1 1
Open pond habitat with cattails and willows around perimeter. Downslope drainage is narrow with infrequent bedrock pools. Cover for
drainage is willow dominated with nearly complete canopy cover.
San Luis Obispo City of San Luis Obispo
Pismo Beach 895
Google Earth
35 degrees 14' 51.07" N
-120 degrees 42' 58.09" W
One adult observed in pond and one hatchling observed basking on bank of drainage pool 120 feet downstream of pond.
Open space
None
None
Halden Petersen
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
06/02/2017
Chorizanthe palmeri
Palmer's spineflower
300-500
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
2980
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.25 - 1.5 miles (as the crow flies) due west and west-southwest of the
Madonna Road trailhead into Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
San Luis Obispo, Pismo Beach 255-345 meters
31S 12E 5 Google Earth
31S 12E 8
Populations concentrated on serpentine outcrops/in serpentine chaparral at: 35.252455 / -120.719047;
35.247949 / -120.717996; 35.244924 / -120.716578
Common among serpentine chaparral/scrub communities and on exposed outcrops in openings in the veg. Dominant
associates include: Ceanothus cuneatus var. ramulosus, Artemisia californica, Hesperoyucca whipplei, Salvia mellifera,
Quercus durata. Other rare taxa (observed in same and adjacent communities): Monardella palmeri, Chorizanthe breweri,
Dudleya abramsii murina, D. blochmaniae blochmaniae,Calochortus clavatus clavatus, Arctostaphylos obispoensis, Carex
obispoensis,Lomatium parvifolium,Sanicula hoffmannii,Perideridia pringlei,Castilleja densiflora obispoensis
...Calystegia subacaulis episcopalis,C.alochortus obispoensis
Protected open space - light recreation/public access; surrounded by private ranches
None
Potential for minor impacts from light recreation
TJM2, Baldwin et al.
Sight ID
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
06/02/2017
Chorizanthe breweri
Brewer's spineflower
1000+
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
09010
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.25 - 1.5 miles (as the crow flies) due west and west-southwest of the
Madonna Road trailhead into Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
San Luis Obispo, Pismo Beach 255-345 meters
31S 12E 5 Google Earth
31S 12E 8
Populations concentrated on serpentine outcrops/in serpentine chaparral at: 35.252455 / -120.719047;
35.247949 / -120.717996; 35.244924 / -120.716578
Common among serpentine chaparral/scrub communities and on exposed outcrops in openings in the veg. Dominant
associates include: Ceanothus cuneatus var. ramulosus, Artemisia californica, Hesperoyucca whipplei, Salvia mellifera,
Quercus durata. Other rare taxa (observed in same and adjacent communities): Monardella palmeri, Chorizanthe palmeri,
Dudleya abramsii murina, D. blochmaniae blochmaniae,Calochortus clavatus clavatus, Arctostaphylos obispoensis, Carex
obispoensis,Lomatium parvifolium,Sanicula hoffmannii,Perideridia pringlei,Castilleja densiflora obispoensis
...Calystegia subacaulis episcopalis,C.alochortus obispoensis
Protected open space - light recreation/public access; surrounded by private ranches
None
Potential for minor impacts from light recreation
TJM2, Baldwin et al.
Sight ID
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
05/05/2017
Castilleja densiflora subsp. obispoensis
San Luis Obispo owl's clover
150+
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
08515
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.2 miles (as the crow flies) southwest of the Madonna Road trailhead into Irish
Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
Pismo Beach 344-346 meters
31S 12E 8 Google Earth
35.244528 / -120.712334
Grassy meadow opening in otherwise chaparral-dominated ridgeline; gorwing on slightly raised area with reduced density of
grasses/higher density of herbs. Dominant associates include: Castilleja exserta, Lasthenia gracilis, Corethrogyne
filaginifolia, Plantago erecta, Microseris douglasii, Festuca perennis, Eschscholzia californica. Other rare taxa (observed in
same and adjacent communities): Monardella palmeri, Chorizanthe breweri, Chorizanthe palmeri, Dudleya abramsii murina,
Calochortus clavatus clavatus, Arctostaphylos obispoensis, Monardella palmeri, Lomatium parvifolium
...Calystegia subacaulis episcopalis,Calochortus obispoensis, Perideridia pringlei
Protected open space - light recreation/public access; surrounded by private ranches
None
Potential for minor impacts from recreation/public access
TJM2, Baldwin et al.
Sight ID
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
06/02/2017
Carex obispoensis
San Luis Obispo sedge
<10
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
0 100 0
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.3 miles (as the crow flies) west-southwest of the Madonna Road trailhead
into Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
San Luis Obispo, Pismo Beach 237-240 meters
31S 12E 5 Google Earth
31S 12E 8
35.250665 / -120.718133
Growing streamside in Froom Creek, overhanging the water. Dominant associates include: Quercus agrifolia, Umbellularia
californica, Cornus sericea occidentalis, Toxicodendron diversilobum, Lonicera hispidula. Other rare taxa (observed in same
and adjacent communities): Monardella palmeri, Chorizanthe breweri, Chorizanthe palmeri, Dudleya abramsii murina,
Calochortus clavatus clavatus, Arctostaphylos obispoensis, Monardella palmeri, Lomatium parvifolium, Sanicula hoffmannii,
Perideridia pringlei, Castilleja densiflora obispoensis
...Calystegia subacaulis episcopalis,C.alochortus obispoensis
Protected open space - light recreation/public access; surrounded by private ranches
None
None
TJM2, Baldwin et al.
Sight ID
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
05/05/2017
Calystegia subacaulis subsp. episcopalis
San Luis Obispo owl's clover
200+
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
56035
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.32 miles (as the crow flies) west-southwest of the Madonna Road trailhead
into Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
San Luis Obispo, Pismo Beach 240 - 250 meters
31S 12E 5 Google Earth
31S 12E 8
Annual grasslands, surrounding: 35.250432 / -120.718964; 35.249751 / -120.718098; 35.248778 / -120.719325
Low-lying annual grasslands around Froom Creek and its tributaries. Dominant associates include: Castilleja exserta,
Hemizonia congesta luzulifolia, Festuca perennis, Bromus spp., Avena spp., Brachypodium distachyon. Other rare taxa
(observed in same and adjacent communities): Monardella palmeri, Chorizanthe breweri, Chorizanthe palmeri, Dudleya
abramsii murina, Calochortus clavatus clavatus, Arctostaphylos obispoensis, Monardella palmeri, Lomatium parvifolium,
Calochortus obispoensis, Perideridia pringlei
Protected open space - light recreation/public access; surrounded by private ranches
None
None
TJM2, Baldwin et al.
Sight ID
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
06/02/2017
Calochortus obispoensis
San Luis mariposa lily
150+
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
0955
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.25 - 1.5 miles (as the crow flies) due west and west-southwest of the
Madonna Road trailhead into Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
San Luis Obispo, Pismo Beach 255-345 meters
31S 12E 5 Google Earth
31S 12E 8
Populations concentrated on serpentine outcrops/in serpentine chaparral at: 35.252455 / -120.719047;
35.247949 / -120.717996; 35.244924 / -120.716578
Common among serpentine chaparral/scrub communities and on exposed outcrops in openings in the veg. Dominant
associates include: Ceanothus cuneatus var. ramulosus, Artemisia californica, Hesperoyucca whipplei, Salvia mellifera,
Quercus durata. Other rare taxa (observed in same and adjacent communities): Monardella palmeri, Chorizanthe palmeri, C.
breweri, Dudleya abramsii murina, D. blochmaniae blochmaniae,Calochortus clavatus clavatus,Arctostaphylos obispoensis,
Carex obispoensis,Lomatium parvifolium,Sanicula hoffmannii,Perideridia pringlei,Castilleja densiflora obispoensis
...Calystegia subacaulis episcopalis
Protected open space - light recreation/public access; surrounded by private ranches
None
None
TJM2, Baldwin et al.
Sight ID
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
06/02/2017
Calochortus clavatus var. clavatus
Club-haired mariposa lily
100+
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
0955
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.25 - 1.5 miles (as the crow flies) due west and west-southwest of the
Madonna Road trailhead into Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
San Luis Obispo, Pismo Beach 255-345 meters
31S 12E 5 Google Earth
31S 12E 8
Populations concentrated on serpentine outcrops/in serpentine chaparral at: 35.252455 / -120.719047;
35.247949 / -120.717996; 35.244924 / -120.716578
Common among serpentine chaparral/scrub communities and on exposed outcrops in openings in the veg. Dominant
associates include: Ceanothus cuneatus var. ramulosus, Artemisia californica, Hesperoyucca whipplei, Salvia mellifera,
Quercus durata. Other rare taxa (observed in same and adjacent communities): Monardella palmeri, Chorizanthe palmeri, C.
breweri, Dudleya abramsii murina, D. blochmaniae blochmaniae,Calochortus obispoensis,Arctostaphylos obispoensis,Carex
obispoensis,Lomatium parvifolium,Sanicula hoffmannii,Perideridia pringlei,Castilleja densiflora obispoensis, Calystegia...
...subacaulis episcopalis
Protected open space - light recreation/public access; surrounded by private ranches
None
None
TJM2, Baldwin et al.
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
05/05/2017
Arctostaphylos obispoensis
BIshop manzanita
5
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
100 0 0
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.25 miles (as the crow flies) due west of the Madonna Road trailhead into
Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
San Luis Obispo, Pismo Beach 255-345 meters
31S 12E 5 Google Earth
31S 12E 8
4 individuals: 35.251029 / -120.717082
1 individual: 35.242862 / -120.710860
4 individuals found on northwest-facing slope above Froom Creek in open serpentine scrub/chaparral (transitional zone). 1
individual on flat ridgeline in dense chaparral, along a remnant trail. Dominant associates include with Ceanothus cuneatus
var. ramulosus, Adenostoma fasciculatum, Quercus durata, Quercus agrifolia, Salvia mellifera. Other rare taxa (observed in
same and adjacent communities): Monardella palmeri, Chorizanthe palmeri, C. breweri, Dudleya abramsii murina, D.
blochmaniae blochmaniae,Calochortus obispoensis,Calochortus clavatus clavatus,Carex obispoensis,Lomatium parvifolium..
..Sanicula hoffmannii,Perideridia pringlei,Castilleja densiflora obispoensis
Protected open space - light recreation/public access; surrounded by private ranches
None
None
Field Guide to Manzanitas, Kauffman
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
05/05/2017
Sanicula hoffmannii
Hoffmann's sanicle
10-12
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
02575
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.4 miles (as the crow flies) west-southwest of the Madonna Road trailhead
into Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
Pismo Beach 248 - 249 meters
31S 12E 8 Google Earth
35.249109 / -120.719625
Growing on upper banks of Froom Creek under dense tree canopy/sparse herb/shrub layer, in thick leaf litter. Dominant
associates include: Quercus agrifolia, Umbellularia californica, Toxicodendron diversilobum, Lonicera hispidula, Rubus
ursinus, Salvia spathacea. Other rare taxa (observed in same and adjacent communities): Monardella palmeri, Chorizanthe
breweri, Chorizanthe palmeri, Dudleya abramsii murina, Calochortus clavatus clavatus, Arctostaphylos obispoensis,
Monardella palmeri, Lomatium parvifolium, Carex obispoensis Perideridia pringlei, Castilleja densiflora obispoensis
...Calystegia subacaulis episcopalis,C.alochortus obispoensis
Protected open space - light recreation/public access; surrounded by private ranches
None
None
TJM2, Baldwin et al.
Sight ID
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
05/05/2017
Perideridia pringlei
Adobe yampah
300+
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
09010
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.25 - 1.5 miles (as the crow flies) due west and west-southwest of the
Madonna Road trailhead into Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
San Luis Obispo, Pismo Beach 255-345 meters
31S 12E 5 Google Earth
31S 12E 8
Populations concentrated on serpentine outcrop/in serpentine chaparral at: 35.247949 / -120.717996
Common on north- & west-facing slopes on serpentine chaparral/scrub community & on exposed outcrops in veg openings.
Dominant associates include: Ceanothus cuneatus var. ramulosus, Hesperoyucca whipplei, Salvia mellifera, Quercus durata.
Other rare taxa (observed in same and adjacent communities): Monardella palmeri, Chorizanthe breweri,Chorizanthe
palmeri, Dudleya abramsii murina,Calochortus clavatus clavatus, Arctostaphylos obispoensis,Carex obispoensis,Sanicula
hoffmannii,Lomatium parvifolium,Castilleja densiflora obispoensis,Dudleya blochmaniae blochmaniae
...Calystegia subacaulis episcopalis,C.alochortus obispoensis
Protected open space - light recreation/public access; surrounded by private ranches
None
None
TJM2, Baldwin et al.
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
06/02/2017
Monardella palmeri
Palmer's monardella
<50
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
85 15 0
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.25 - 1.5 miles (as the crow flies) due west and southwest of the Madonna
Road trailhead into Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
San Luis Obispo, Pismo Beach 262-345 meters
31S 12E 5 Google Earth
31S 12E 8
Observed in three separate locations: 35.253321 / -120.718892; 35.248418 / -120.717519;
35.243329 / -120.710623
Uncommon in concentrated on north- & west-facing slopes on serpentine chaparral and grassland. Dominant associates
include: Ceanothus cuneatus var. ramulosus, Quercus durata, Corethrogyne filaginifolia, Hemizonia congesta luzulifolia,
Stachys bullata, annual grasses. Other rare taxa (observed in same and adjacent communities): Chorizanthe breweri, C.
palmeri, Dudleya abramsii murina,Calochortus clavatus clavatus, Arctostaphylos obispoensis,Carex obispoensis,Sanicula
hoffmannii,Lomatium parvifolium,Castilleja densiflora obispoensis,Dudleya blochmaniae blochmaniae, Perideridia pringlei
...Calystegia subacaulis episcopalis,C.alochortus obispoensis
Protected open space - light recreation/public access; surrounded by private ranches
None
None
TJM2, Baldwin et al.
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
05/05/2017
Lomatium parvifolium
Small-leaved lomatium
<50
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
50 50 0
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.25 - 1.5 miles (as the crow flies) due west and west-southwest of the
Madonna Road trailhead into Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
San Luis Obispo, Pismo Beach 255-345 meters
31S 12E 5 Google Earth
31S 12E 8
Populations concentrated on serpentine outcrops/in serpentine chaparral at: 35.252455 / -120.719047;
35.247949 / -120.717996; 35.244924 / -120.716578
Common among serpentine chaparral/scrub communities and on exposed outcrops in openings in the veg. Dominant
associates include: Ceanothus cuneatus var. ramulosus, Artemisia californica, Hesperoyucca whipplei, Salvia mellifera,
Quercus durata. Other rare taxa (observed in same and adjacent communities): Monardella palmeri, Chorizanthe
breweri,Chorizanthe palmeri, Dudleya abramsii murina,Calochortus clavatus clavatus, Arctostaphylos obispoensis, Carex
obispoensis,Sanicula hoffmannii,Perideridia pringlei,Castilleja densiflora obispoensis, Dudleya blochmaniae blochmaniae
...Calystegia subacaulis episcopalis,C.alochortus obispoensis
Protected open space - light recreation/public access; surrounded by private ranches
None
None
TJM2, Baldwin et al.
Sight ID
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
05/05/2017
Dudleya blochmaniae subsp. blochmaniae
Blochman's dudleya
<20
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
100 0 0
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.35 miles (as the crow flies) west-southwest of the Madonna Road trailhead
into Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
Pismo Beach 285-295 meters
31S 12E 8 Google Earth
35.247853 / -120.718351
Exposed, northwest-facing serpentine outcrop. Dominant associates include: Ceanothus cuneatus var. ramulosus, Artemisia
californica, Hesperoyucca whipplei, Eriophyllum confertiflorum, Hesperolinon micranthum, Plantago erecta. Other rare taxa
(observed in same and adjacent communities): Monardella palmeri, Chorizanthe breweri,Chorizanthe palmeri, Dudleya
abramsii murina,Calochortus clavatus clavatus, Arctostaphylos obispoensis, Carex obispoensis,Lomatium
parvifolium,Sanicula hoffmannii,Perideridia pringlei,Castilleja densiflora obispoensis
...Calystegia subacaulis episcopalis,C.alochortus obispoensis
Protected open space - light recreation/public access; surrounded by private ranches
None
None
TJM2, Baldwin et al.
Sight ID
Date of Field Work (mm/dd/yyyy):
California Native Species Field Survey Form
Scientific Name:
Common Name:
Species Found?
Plant Information
Habitat Description (plants & animals)
Animal Behavior
Site Information
Determination: Photographs:
Location Description (please attach map AND/OR fill out your choice of coordinates, below)
Animal Information
Reporter:
Address:
E-mail Address:
Phone:
Is this an existing NDDB occurrence?
DATUM:
OR
NAD27 NAD83 WGS84
Clear Form Print Form
06/02/2017
Dudleya abramsii subsp. murina
Mouse-gray dudleya
7500+
Kristen Nelson
3765 South Higuera Street
San Luis Obispo, California 93401
knelson@terraverdeweb.com
(702) 596-5038
25 75 0
Irish Hills Natural Reserve, west of City of San Luis Obispo; 1.25 - 1.5 miles (as the crow flies) due west and west-southwest of the
Madonna Road trailhead into Irish Hills (where Madonna Road dead-ends at a round-about).
San Luis Obispo City of San Luis Obispo
San Luis Obispo, Pismo Beach 255-345 meters
31S 12E 5 Google Earth
31S 12E 8
Populations concentrated on serpentine outcrops/in serpentine chaparral at: 35.252455 / -120.719047;
35.247949 / -120.717996; 35.244924 / -120.716578
Abundant on exposed serpentine outcrops & occasional in adjacent communities. Dominant associates include: Ceanothus
cuneatus var. ramulosus, Artemisia californica, Hesperoyucca whipplei, Salvia mellifera, Quercus durata. Other rare taxa
(observed in same and adjacent communities): Monardella palmeri, Chorizanthe breweri,Chorizanthe palmeri, Dudleya
blochmaniae blochmaniae,Calochortus clavatus clavatus, Arctostaphylos obispoensis, Carex obispoensis,Lomatium
parvifolium,Sanicula hoffmannii,Perideridia pringlei,Castilleja densiflora obispoensis
...Calystegia subacaulis episcopalis,C.alochortus obispoensis
Protected open space - light recreation/public access; surrounded by private ranches
None
None
TJM2, Baldwin et al.
Sight ID
ATTACHMENT E – Representative Site Photographs
This page intentionally left blank.
Photo 1. View north across the central valley of the Waddell Ranch property (May 05, 2017).
Photo 2. View east toward grassy meadows near southern property boundary (May 05, 2017).
Photo 3. View north along historical rock wall toward western property boundary (May 05
2017).
Photo 4. Grassy meadow habitat with seasonal seep, in opening of chaparral near southern
property boundary (May 05 2017).
Photo 5. View northeast of the City of San Luis Obispo from the ridgeline south of Froom Creek
(May 05 2017).
Photo 6. View south across the property from the ridgeline north of Froom Creek (June 02,
2017).
Photo 7. Coast gartersnake foraging in the cattail marsh at the edge of the stock pond (June 02,
2017).
Photo 8. Common poorwill nestling on the serpentine outcrop north of Froom Creek (June 02,
2017).
Photo 9. Western pond turtle snout in the middle of the stock pond (June 19, 2017).
Photo 10. Two adult California red-legged frogs found on algae mats in Froom Creek (June 19,
2017).
Photo 11. Wilson’s warbler singing in the oak woodland near Froom Creek (June 19, 2017).
Photo 12. Young male Columbian black-tailed deer near the northern corner of the property
(June 13, 2017).
Photo 13. New species of Chorizanthe growing with C. breweri (June 13, 2017).
Photo 14. New species of Chorizanthe; photo by Kyle Nessen (June 17, 2017).
Photo 15. Calochortus argillosus on the grassy hill south of the stock pond (June 02, 2017).
Photo 16. Calochortus obispoensis growing in the yucca scrub north of Froom Creek (June 02,
2017).
Photo 17. Monardella palmeri growing near the serpentine seep northwest of the stock pond
(June 02, 2017).
Photo 18. Streptanthus glandulosus growing with Dudleya abramsii subsp. murina on the
serpentine outcrop north of Froom Creek (May 05, 2017).
Irish Hils Natural Reserve Conservation Plan – Waddell Ranch Addition
29
Appendix D:
Results of Focused Botanical Surveys for Irish Hills Spineflower (Chorizanthe
aphanantha) Completed in the Irish Hills Natural Reserve, City of San Luis Obispo,
California, Terra Verde Environmental, June 17, 2018
3765 South Higuera Street, Suite 102 San Luis Obispo, CA 93401 702-596-5038 knelson@terraverdeweb.com
June 19, 2018
Mr. Robert Hill, Natural Resources Manager
City of San Luis Obispo
990 Palm Street
San Luis Obispo, CA 93401
RE: Results of Focused Botanical Surveys for Irish Hills Spineflower (Chorizanthe aphanantha)
Completed in the Irish Hills Natural Reserve, City of San Luis Obispo, California
Dear Mr. Hill,
This memorandum is being provided to summarize the results of a series of focused botanical
surveys completed by Terra Verde Environmental Consulting, LLC (Terra Verde) throughout the
City of San Luis Obispo’s (City) Irish Hills Natural Reserve (Reserve). The purpose of the surveys was
to document the geographical range of the newly-described Irish Hills spineflower (Chorizanthe
aphanantha K.M. Nelson & D.J. Keil, in review), which was discovered during a spring 2017
botanical survey of the Waddell Ranch, a parcel on the western edge of the Reserve. In 2017, the
City acquired the 154-acre Waddell Ranch property as an extension of the existing Reserve. Prior
to formally adding the Waddell Ranch property to the Reserve and opening it to the public for
conservation and recreation purposes, the City retained Terra Verde to conduct biological surveys
on the new parcel, in order to inform necessary updates to the existing Irish Hills Natural Reserve
Conservation Plan Update (Plan). The following includes a summary of the survey methods and
results of the recent focused surveys, as well as management recommendations for the newly-
described species.
Survey Methodology
Terra Verde conducted a series of surveys in May and early June, 2018, to capture the peak
flowering and early fruiting period of Irish Hills spineflower, when it is most readily identifiable.
Surveys focused on identifying and documenting the overall range of the new species along
existing trails and natural openings within suitable chaparral habitat throughout the Reserve (see
Attachment A – Survey Results Map). In addition, new information was documented about the
phenology and population size. New collections were made and submitted to the Hoover
Herbarium at California Polytechnic State University, San Luis Obispo (Kristen M. Nelson, collection
#44, #47).
Terra Verde botanist Kristen Nelson led a series of seven surveys on May 11, 14, 19, 22, 23, 28, and
June 02. Additional observations were also made earlier in the season (April 05 and May 05), the
results of which are included here. Surveys were pedestrian in nature and lasted between 2 and 10
hours each day. Wherever found, individuals and populations of Irish Hills spineflower were
2
documented using a Trimble hand-held global positioning system (GPS) unit with sub-meter
accuracy (see Attachment A).
Survey Results
During the 2018 surveys, approximately 24,000 individuals of Irish Hills spineflower were
documented throughout the Reserve. Dense populations were documented along the northern
end of the Mariposa Trail, in two meadow openings in the chaparral along the Ocean View Trail,
and in the vicinity of two abandoned chromium mines off the Mine and Wednesday Trails. More
scattered occurrences were documented along the Froom Creek, Poppy, Canyon View, and Morro
View Trails. Additional areas of suitable habitat exist in portions of the Reserve that were not
included in the 2018 focused surveys. In particular, the ridgeline that borders the eastern edge of
the Waddell Ranch parcel and the hill that covers the southwestern corner of the Waddell Ranch
parcel support a mosaic of dense to open chaparral with occasional grassy and rocky openings that
appear suitable for supporting Irish Hills spineflower.
Irish Hills spineflower occupies a fairly consistent micro -habitat, in rocky openings of serpentine
chaparral, and generally at the immediate edge of shrub canopy . Dominant overstory species
consist of buckbrush (Ceanothus cuneatus var. ramulosus), leather oak (Quercus durata), and black
sage (Salvia mellifera), with infrequent occurrences of Bishop manzanita (Arctostaphylos
obispoensis), chaparral pea (Pickeringia montana), chaparral yucca (Hesperoyucca whipplei),
chamise (Adenostoma fasciculatum), and California sagebrush (Artemisia californica). In several
locations, where grassy meadows occupy large openings in the chaparral shrub cover, Irish Hills
spineflower was observed at variable density (sparse to very dense) at the margins of meadows,
occurring with a mix of native and non -native grasses dominated by foothill needle grass (Stipa
lepida) and rye grass (Festuca perennis). Irish Hills spineflower often co-occurs with Brewer’s
spineflower (Chorizanthe breweri), occasionally growing under its sprawling canopy. It was also
documented co-occurring with Palmer’s spineflower (Chorizanthe palmeri) at a few localities.
GPS data depicting Irish Hills spineflower observations was collected and mapped in a way that
illustrates the overall range and distribution of the species within the Reserve. Point data was
collected when a small, discrete patch of individuals was observed. These patches often consisted
of less than 30 individuals in a very localized patch, typically a small open ing in the chaparral
canopy at the edge of an existing trail. Line data was collected when individuals and small to large
patches of Irish Hills spineflower were observed along a continuous section of trail. Polygon data
was collected to document larger patches that were entirely or mostly occupied by Irish Hills
spineflower (e.g., large openings around abandoned mines).
Management Considerations
When it was originally discovered and documented in 2017, Irish Hills spineflower was only known
to occur on a single hill slope above Froom Creek, near the northern corner of the Waddell Ranch
parcel. At the time, approximately 200 to 300 individual plants were documented at this locality.
Formal publication and acceptance of the new species is pending, and expecte d in late 2018.
Following publication of the new taxon, documentation will be submitted to the California Native
Plant Society, with a request to consider assigning Irish Hills spineflower a California Rare Plant
Rank. Although the known range and population size of this species was greatly expanded during
3
the 2018 surveys, the specific habitat requirements and overall limited range of the species
warrants careful management to avoid adverse impacts to the population on City -owned property.
It appears that Irish Hills spineflower is tolerant of limited disturbance associated with the
creation, recreational use, and maintenance of trails through chaparral. However, t o aid the City in
amending the existing Plan, and particularly for management of the newly-described species, the
following management considerations are offered:
Establishment and maintenance of trails through chaparral habitat should occur outside the
flowering and fruiting period for Irish Hills spineflower to the extent feasible, which may
span from mid-March (early bolting) through late June (seed set).
Prior to being brought to the Reserve, vehicles, hand tools, and other equipment used at
the Reserve should be cleaned of all soil/mud and other debris to avoid the spread of non -
native or invasive plants.
If feasible, the City should search un-surveyed portions of the Reserve and suitable habitat
on other City-owned properties (e.g., Reservoir Canyon/Bowden Ranch, South Hills, Johnson
Ranch, etc.) for additional occurrences of Irish Hills spineflower to further refine the known
range for this species.
Interpretive trail signs should be installed to inform the public of the sensitivity of resources
present, and important ways in which those resources can be protected (e.g., stay on trail,
pack-in/pack-out trash, don’t pick wildflowers, etc.).
Surrounding the old homestead and near the Froom Creek Trail access to the Waddell
Ranch parcel, remove saplings/volunteer sprouts of Aleppo pine (Pinus halepensis), blue
gum (Eucalyptus globulus), and red gum (Eucalyptus camaldulensis), whenever possible, to
avoid spread into adjacent habitat. Aleppo pine has already become naturalized within the
ornamental stand of trees along the Froom Creek Trail.
These recommendations should be considered in the management of the Waddell Ranch property
and the entire Reserve to support public recreation and the persistence of pristine native habitats
and diverse species assemblages, including robust populations of special-status plant populations.
If you have any questions or require additional information, please contact me at
knelson@terraverdeweb.com or at (702) 596-5038.
Sincerely,
Kristen Nelson
Botanist
Attachments
A – Survey Results Map
B – Representative Habitat and Species Photographs
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ATTACHMENT A – Survey Results Map
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MariposaOcean View
Froom Creek
Morro View Mi
neWednesdayCanyon View
Poppy
Ocean View
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS U serCommunity¯0 1,000 2,000500Feet
Focused Survey Area
Approximate Waddell Ranch Property Boundary
Spineflower Area
Spineflower Along Trail
Spineflower - Discrete Area
City of San Luis Obispo - Focused Surveys for Irish Hills Spineflower (Chorizanthe aphanantha)Survey Results Map
19 Jun 2018
ATTACHMENT B - Representative Habitat and Species Photographs
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Photo 1. Basal leaves and early inflorescence development on Irish Hills spineflower at the
northern corner of the Waddell Ranch parcel (04/05/18).
Photo 2. Early flower development on several individuals of Irish Hills spineflower along the
edge of the Wednesday Trail (05/05/18).
Photo 3. Occupied habitat along the edge of the Wednesday Trail; Irish Hills spineflower
observed within and adjacent to pervious pavers (05/19/18).
Photo 4. Small patch of several very small individuals of Irish Hills spineflower near the
abandoned mine at the end of the Wednesday Trail (05/19/18).
Photo 5. Irish Hills spineflower (right) growing under Brewer’s spineflower (left) on the
northern end of the Mariposa trail; top scale shows centimeters (cm)/millimeters (mm)
(05/14/18).
Photo 6. Occupied habitat along the edges of the Mariposa Trail (05/14/18).
Photo 7. Larger, sprawling individual of Irish Hills spineflower along the Mariposa Trail; right
scale shows cm/mm (05/14/18).
Photo 8. Dense patch of Irish Hills spineflower growing at the edge of a grassy meadow off the
Ocean View Trail (05/23/18).
Photo 9. Smaller, more compact individuals of Irish Hills spineflower growing trail -side on the
Ocean View Trail (05/23/18).
Photo 10. Open flowers of Irish Hills spineflower (left) and Brewer’s spineflower (right)
(06/02/18).
Photo 11. Occupied habitat surrounding the abandoned mine off the Wednesday and Ocean
View Trails (06/02/18).
Photo 12. Grassy meadow off the Ocean View Trail; Irish Hills spineflower found concentrated
along the northern edge (left) of the meadow (06/02/18).