HomeMy WebLinkAbout02/20/1990, 4 - CONSIDERATION OF PARKS AND RECREATION ELEMENT POLICY CONCERNING CREEK TRAIL ACCESS FOR PROPERTY LOC MEETING DATE:
�i11N�11fII�I(II@uII j�II City of san LUIS OBISpo -t a-fo
COUNCIL AGENDA REPORT MEM NUMBEq
FROM: Arnold JonaIommunity Development Director; By: Jeff Ho Associate Planner
SUBJECT: Consideration of, Parks and Recreation Element policy concerning creek trail
access for property located at 1300 Pismo Street; Don Wright, property owner.
CAO RECOMMENDATION: By motion, determine that City purchase of the property is
not needed, and direct staff to secure an irrevocable offer to dedicate easements for
pedestrian access, creek maintenance and open space preservation as part of any future
development approvals.
BACKGROUND
The Parks and Recreation Element indicates that the City should acquire this site as an
access and staging area for citywide urban trail system. The lot's new owner, Don Wright,
recently applied for a variance to allow a reduced street yard along Pismo Street (V1471).
Before taking action on the development application, council direction is needed on whether
to acquire the lot for creek trail purposes, or not to acquire the property and to continue
processing of the current development proposal.
Development of an urban trail system is one of the element's targeted program objectives.
A concept plan shows a series of trails and access points along the city's major creeks,
linking neighborhoods and existing parks or recreation facilities. The Element's appendix
lists specific projects or actions by which the City is to meet the program objectives. It
shows a detail (D6, p. 179, attached) of the creek trail from Dallidet Adobe to Pepper Street,
and shows this lot as a primary pedestrian access point.
DATA SUMMARY
Property Owner. Don Wright
Zoning: R-2
General Plan: Medium-density Residential
Environmental Status: Categorically Exempt (CEQA Section 15303)
Site Description: The site is irregularly shaped, and covers about 12,000 square feet (.28
acre). About one-half of the lot's total area is within the top of banks of San Luis Obispo
Creek and is undevelopable. The vacant site is bordered by houses on three sides, and has
frontage on Johnson Avenue and Pismo Street. The developable, northeast ,portion of the
site is level and covers about 3700 square feet.
ANALYSIS
Project Description
The property owner wants to build a two-story, .2300 square foot house on the site. He has
requested a variance to allow the house to be set back seven feet from the Pismo Street
property line rather than 20 feet as normally required. The house would cover about 13
percent of the site's total area, with an additional seven percent covered by paving. A rear
yard of about 750 square feet is shown between the house and top of creek bank; the rest
of the site would not be affected by the development. The owner has indicated that he
would be willing to grant an easement to the City for creek access, maintenance, and open
RECEIVED
FEB 1 2 1990
y-/
SAN LUIS OBISPO,CA
I�I�II�IIIII��III�II�III 1" MEETING DATE:
cityo san tuts oBispo
COUNCIL AGENDA REPORT ITE "Nom:
Page 2
Creek Trail Plan
The Parks and Recreation Element provides for purchase of this property to:
1. Allow public access I,Q and ;i1QJ1g this section of creek; and
2. Preserve the City's option to use the site for a staging area to facilitate public
trail access. Staging area facilities could include: a small parking lot,
landscaped area, trail directory signage, seating, and public art.
This site is one of 12 pedestrian access points shown in the conceptual trail plan. If the
City did = purchase the site, public creek access would still be possible by:
A) Securing creek access from other nearby sites; or
B) Securing creek access from the Wright property through easements.
In the first approach, the City could provide public access to the creek from two locations
within one-half block of the Wright property:
-from Pepper Street (adjacent to the Southern Pacific Railroad bridge); and
-from 1262 Pismo Street (on the opposite side of Johnson Street from the Wright
property).
Both alternatives would require that the City purchase public access rights or secure access
as a condition of future development approvals since no right-of-access exists today.
In the second approach, the City may be able to achieve its primary access objectives
without purchasing the Wright property by securing an irrevocable offer to dedicate !
easements for public creek access as a condition of development approval. This would
allow the City to maintain the option for an access trail across the lot near the corner of
Pismo and Johnson, and a trail paralleling the creek through the property, within the creek
area. In discussions with staff, the owner has expressed willingness to consider this
approach.
The drawback here is that the City would lose some flexibility in using the site as a
trailhead or "staging area." Once developed with a house, there would not be enough room
to provide on-site parking, public seating, or amenities other than an access trail and
perhaps a directory sign. Staff does not consider the loss of on-site parking to be problem,
since: 1) the trail system is not likely to generate significant parking demand at this
location; 2) staff questions the suitability of locating a public parking lot next to existing
houses; and 3) Pismo Street dead-ends at the railroad tracks and there is enough on-street
parking to meet future parking demand.
Fiscal Issues
If the council supports purchase of the property, the Parks and Recreation Element states
that the council should:
1. Authorize an appraisal of the property if acquisition is contemplated; and
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-111 11,111IIIIIIPIRI I city r MffTiNG DATE:
��� u ��luol Cl`"'�' Or Shc'11U1S OBISpO 2-za—90
MR IN MCOUNCIL AGENDA REPORT ITEM NUMBER:
sieff Revert
Page 3
2. Initiate eminent domain proceedings and negotiate the purchase of the
property if acquisition is desired.
The Element also notes that not all sites slated for city purchase may be needed, and that
a case-by-case review should be done to determine which sites should be acquired,
considering program needs and trail design options. In 1982, the estimated cost of acquiring
this property and developing creek trail facilities was $103,000. Updated cost estimates are
not available; however today's costs of acquiring and developing the property would be
significantly higher.
The city's Capital Improvement Plan earmarks $300,000 for the purchase of open space and
parkland. The projected 1991-93 budget includes an additional $2 million for open space
acquisition. In the interim, the current $300,000 is available for limited open space
purchases. If the City chooses to purchase this site, there will be less money available for
the purchase of other creekside properties which may be more essential to meet. the city's
overall open space objectives.
STAFF RECOMMENDATION
Staff believes that the Parks and Recreation Element's urban trail objectives can be met
without purchasing this property, and recommends that the council:
1. Determine that City purchase of the property at 1300 Pismo Street is not
necessary; and
2. Direct staff to secure an irrevocable offer to dedicate easements for public
creek access, maintenance, and open space preservation as part of any
development approval on this site.
i
If the council chooses to initiate acquisition, it should so indicate by motion and authorize
staff to obtain a property appraisal. Staff would then return with the appraisal results at
a later date, and ask for council authorization to initiate eminent domain proceedings and
begin negotiations for purchase of the property.
Attachments:
-Vicinity Map
-Site Plan of Proposed Development
-Concept Urban Trail Plan
-Excerpts, Park and Recreation Element and Technical Appendix
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K. APPENDIX
1. Th following park projects that are shown in Technical Report 2 have been amended or
revised as follows:
N3 Bishop's Peak School/Park Seek joint-use agreement to allow development of
better ballfield and play lot. and picnic facilities for weekend use. Revised
cost estimate is 5200,000. No land purchase.
N13 Pacheco School/Park: Seek joint-use agreement to allow development of
additional play equipment, planting and site furnishings. Revised cost estimate
is $30,000. No land purchase.
N24 Flora Street Mini-Park and Trait Trail easement and .5 acre turf play area to
be developed and maintained by developer. No cost to city.
N47 San Adriano Park: Actual size of dedicated land is about 4 acres. Omit city
purchase of adjacent lot. Revised cost $131,0.00..
N52 Meadow Park: Redevelopment at future date to keep up with changing needs.
Revised cost $200,000.
D4 Cuesta Park: Reduce scope of project. Additional land costs are 5125,000 for
parking and park expansion. Development of facilities is estimated at $400,000.
D5 Veteran's Hall: Acquisition of county property omitted. No development cost
change. '
6 Creek Trail:. Reduced scope of development. Concentrate improvements at access
points.. Revised cost is $103,000, including land purchase.
2. Examples of water conservation measures for the city park system:',
a. Use of well water for irrigation only, in new and existing parks.
b. Use of water from Laguna Lake to irrigate the proposed Laguna Lake Community
Park and the existing golf course on Los Osos Valley Road.
C. Use of effluent from the city's wastewater treatment plant to irrigate community
landscaped areas.
d. Use of some water from San Luis Creek and Stenner Creek to irrigate adjacent
park areas.
e. Possible development of 'gray water' systems for some park irrigation.
f. Installation of sprinkler systems which provide irrigation only when the
moisture content in the soil drops below certain critical levels.
l
1
The city will continue to refine the urban trail plan and develop precise
design standards that control the type of access to and use of specific
sections of the trail system. \
° and 01her Public Lands: should be
Public Utility Easements_,Riahts-of-Way.
maintained in a safe and orderly state and, where appropriate, used as part
of the city's open space and recreation system.
° Reservoir
Canyon ilk Lopez Canyon; Public access to these sensitive areas
will be allowed when consistent with sound resource management. Minimal
facilities might be provided. These areas should b erved in their
natural states. Local n o o anization e
ed to he provide periodic clean up.
Access Improvement The city will work on improving access to existing
city recreation facilities. Examples of these types of projects include:
Building sidewalks and bike paths to join housing areas with schools
and parks.
Creating creek-side trails to connect housing areas with parks while
avoiding major arterial streets and the railroad tracks.
°
Ove n As part of its Hillside Planning Program, the city
will develop specific programs to preserve scenic hillside areas. Similar
programs will be developed for major creeks in San Luis Obispo. .
The city's creekways provide routes to parks and schools
for many people. The city should seek to develop safe, G
maintainable creek access points and paths wherever possible.
r
7
72) . iDesgnate and develop (as necessary) , on-street
trail linking San Luis Creek trail with Mitchell
Park along Pismo Street.
3) . Close Andrews Streetand develop -traii access
connection linking the proposed. San Luis Creek
trail and Veteran's Park. (See district park
proposal , p. 178.)
4) - Acquire by dedication of easement, develop jointly,
hillside access trail at end of Lizzie .Street `
extending to Santa Lucia foothills. (See
neighborhood proposals , p . 80.) Combine with
on-street designated trail along Fixlini Street.,
linking with acquired easement through San Luis
Obispo County lands proposed subdivision and M
dedicated Flora Street Mini-Park: Extend link
with designated on-street trail along Bishop I
Street to Terrace Hill Park.
S) . Designate and develop (as necessary) on-street
trail along Blvd. del Campo to connect Terrace
Hill Park with Sinsheimer Park.
`J 6) . Designate and develop p (as necessary) on-street
trail along Southwood Drive connecting Sinsheimer
Park with proposed park sites at Orcutt Knob
and the end of Sequoia Drive. (See neighborhood
park proposals, pp . 108 and 110 .) 0
7) . Acquire dedication of easement to. develop trail
link under railroad tracks and along Southern.
Pacific Railroad right-of-way to create link with
Sinsheimer- Park. (See neighborhood proposal ,
P. 98
Outside City Limits
8) . Acquire by dedication of easement (possibly
develop jointly with county) trail along Reservoir
Creek connecting Cuesta County Park with Reservoir
Canyon Park.
"00,�9� 210
C L - � J - i V 11 V 11 r r . Y 1 V V V 1'l L J ` 1' L 1• J V 1 l 1 f1 1 v ` v iJ r
'47 AGENDA tit ruary 19, x990
To: City of San Lui p On. MN # CG� C�ct/,�,C�•C
City Council JDvvtJ
Frnm: Don ane Rrannr Wright .9,/,,"I
1619 Phillipa Lane _
S. L, O.
Rrgarding: Council Agenda Item #4 - Business Items - 2/20/90
Dear Mayor and Councilmembers,
I grew up in San Luis Obispo. I've been here ,since 1949.
The importance of this is that a large part of who I am is made.
up of a remembrance of the streets and places and images of this
town. It ' s nearly as much a part of me as my parents are. My
fathpr has bnen here since.. .19.17 . So,_ .t4ough,_cnun:tjes.a. stories
which have taken on lives of their own, I feel like I've been
here even longer. This is my permanent home. I work here and
intend to raise+ my two children here.
In thr terrible economic reality of the present, I realized
that the only proprrty which we might be able to even remotely
afford, could be onr with rievelopmrntal difficulties. After a
vrar of srarching, we were able to purchase this lot on the cor •
nrr of Johnson Ave, and Pifimo Street. It was truly our only choice.
From the time we rut the Lot into Pperow in early November,
began working closely with Planning Staff to design a home and
vitr that would br oenat.tivP to the creek Pnvironment and allow
for onrn space and trait access on the opposite bank. The final
design is a result of this cooperative rEfort.
Concerning the Parks and Recreation Elempnt' s recommendation
that the city acquire this nroaerty: From the time it was pub-
liahoe in June of 1987, no previous owner was ever notified.
Thyro is nothing recorded on the property. There is no designa-
tion on the Poning maps. And it was not brought up in the nu .
mprous discussions I had with city staff, until it was discovered
on the day of our second administrative hearing on January 19 of
this year, For which we had made application on November 30 , 1989.
If and when an urban trail system ever becomes a reality.
If the people of San Luis Obispo want it and if the City is able
to secure easements through the hundreds of backyards of private
homes through which San Luis Creek travels. then we' ll be happy
to make our contribution, for which we've made an Offer of Ded-
ication - as shown. on the site nlan attached to the staff report.
In the meantime, I ask that you please act without further
delay and allow us to keep this little piece of land that repre-
sents the hopes and dreams of a family.
Thank You,
�, -C
J
.MEETING `-�
DA AGENDA
TE
C e�no r �`-�.►f G Y1
LTCi y Atty. +
(Clerk-o6g.
Dear Councilmembers; Alot A
e gt
Re: Business item #4 , City Council Agenda, February 20, 1990
As residents who have demonstrated an ongoing interest
in the creekside trails, we appreciate Randy Rossi ' s
cooperation; however, we request a Council -study session to
address our major concerns:
1. How to preserve the wildlife and fauna for future
generations?
2 . Is this trail for the residents of SLO or for the
tourist industry?
3 . Since the Park and Recreation Element policy has
been sporadically applied in the past, how can we
redefine the trail and its access points before further
decisions are made?
4 . Pertinent at this time, due to the expansive
development along our creeks, a comprehensive study is
requested.
We prefer a positive, constructive approach to the
trail system, rather than a reaction to a "fait accompli" .
FCB 2 0 1990
CITY COUNCIL
SAN LUIS OCISPO, CA.
I ,
J:
"EMNG AGENDA
�F�Counc:l DAAMtAO #
2Mity Atty.
Dear Councilmembers; ®'Clerk-odg._8 �AIb V1B��pi� �
Re: Business item #4 , City Council Agenda, February 20, 1990
As residents who have demonstrated an ongoing interest
in the creekside trails, we appreciate Randy Rossi 's
cooperation; however, we request a Council study session to
address our major concerns:
1. How to preserve the wildlife and fauna for future
generations?
2 . Is this trail for the residents of SLO or for the
tourist industry?
3. Since the Park and Recreation Element policy has
been sporadically applied in the .past, how can we
redefine the trail and its access points before further
decisions are made?
4. Pertinent at this time, due to the expansive
development along our creeks, a comprehensive study is
'I
requested.
We prefer a positive, constructive approach to the.
trail system, rather than a reaction to a "fait accompli" .
a-�d2o/90 ,
/9oZo aQ.xJ o{tuo o�.S.I.µc-
FEB 2 0 19911
CITY COUNCIL
SAN LUIS U1313PO, CA
5. WATER ACTION LEVELS (NSTLAND/517 - 20 min.)
Report not received by agenda close. To be distributed under separate
cover.
J
IpI MEETING DATE:
���milIxWaIlLg city of Sall LUIS OBI SPO
February NU 2. .1990
REM NUMBER
COUNCIL AGEN13A REPORT
FROM: William T. Hetland, Utilities Director V'
SUBJECT. Water Action Levels
RECOMMENDATION: Adopt the attached resolution which will modify the Annual Water Operational
Plan and adjust the City's Water Action Levels.
BACKGROUND
The City of San Luis Obispo adopted an Annual Water Operational Plan Policy in June, 1985. The basic
purpose of the policy was to develop a system to monitor the City water resources and implement water
conservation measures when required. This policy also established specific water action levels. The City
has been following this policy since implementation and as a result is in a mandatory water conservation
program.
Since the Annual Water Operational Plan has been implemented, a number of changes have occurred which
necessitate modification to the water action levels. The key items that have occurred include:
1.As the City approaches stricter mandatory water conservation it is important that the policy guidelines
are easy to understand and easily communicated to the public.
2. The current action level definitions are not consistent and have caused some confusion.
3. The action levels have a large jump from the 25% mandatory water conservation level to the 50%
level. It is felt that an intermediate level would be appropriate.
4. The action levels are a function of water demand, well production and reservoir minimum pool.
Currently, as these parameters vary, it causes a change in the action levels. This led to additional
confusion and therefore it was felt that it would be helpful if changes could be minimized.
5. The initial action levels were developed with the idea of entering a drought condition. They did not
address what should be done when exiting a drought condition.
With these concerns in mind, staff recommends revising the action levels.
Annual Water Demand
The first parameter addressed was the annual water demand. As conservation goals are achieved, the
projected annual water demand would be lowered and could change often. In order to establish a fixed
demand level, Utilities and Community Development staff simply developed a base water demand without
conservation influence. By taking the actual water consumption for 1987 and adding the projected additional
consumption required by issued building permits,a.fixed base water demand was set. This annual base water
demand is 8,050 acre feet (AF). Since each action level has a water conservation goal defined, these goals
were used to determine the new demand consumption at that conservation level. This approach resulted in
fixed water demands which are used for determining the action level for each conservation level.
Well Production
The well production parameter was based on a single month historical usage projected over a year. This
resulted in the well production being 1,500 AF. This value will fluctuate as the additional groundwater
resources are developed.
RECEIVED
111#6A
FEB 1 3 1990
CITY CLERK
SAN LUIS OBISPO,CA
"NIMARD city Or sa►n tins OBISPO
MWmO COUNCIL AGENDA REPORT
Water Action Levels
February 20, 1990
Page 2
Minimum Pool
The minimum pool values were established by Council policy as 2,000 AF for the Salinas reservoir and 2,000
AF for the Whale Rock Reservoir. The City's share of the Whale Rock Reservoir minimum pool is 55% of
2,000 AF or 1,100 AF for a total minimum pool value of 3,100 AF.
Minor Action Level
The minor action level was defined as 66%of total reservoir storage, in contrast with the other action levels
being defined as a specific number of years of supply less well production plus the minimum pool. Staff
is recommending that the minor action level definition be changed to correspond to the other action levels.
It was determined that a 3.0 year supply less well production plus minimum pool would be an appropriate
definition and would be more consistent with the other action level definitions.
Add 35% Conservation Level
Staff felt that the large jump between action levels was too great an increase in one jump and that an
intermediate level would make a smoother transition. But it was necessary to make sure that the intermediate
level would still provide adequate water for the City in an extended drought. Therefore, staff developed
a computer model to project reservoir levels throughout the remainder of the drought so that the effect of
different conservation levels could be predicted. The model was based on four assumptions:
- 1987 City water consumption levels discounted at 35% conservation.
- 1989 climatological patterns for rain, evaporation, and inflow.
- 1989 consumption for all other downstream users of the a reservoirs.
Groundwater well production at 1,500 AF yearly.
These assumptions provide a conservative projection of reservoir levels. Staff used a 35%conservation level
as this is the actual level of conservation being achieved now with a 25% mandatory conservation program
in effect. The model then computed the reservoir levels resulting from the gains and losses of water as
would be experienced based on the assumptions. Figure 1, Total City Storage demonstrates that while
reservoir levels are projected to continue to decrease, establishing a conservation level of 35% can allow us
to remain above minimum pool until the predicted end of the drought in January, 1993 and still have
additional water in the reservoir above the minimum pool.
While the four assumptions provide us a conservative projection, any of these factors may change
significantly so that the projected levels are not achieved. If more water is used from the reservoirs, i.e.
wells do not produce at the expected level, the curve will be steeper and the next action level will be reached
sooner. The curve can be made less steep if more rain and runoff occurs or higher levels of conservation
are achieved. In the coming months, as we track the actual reservoir levels against the model, the steepness
of the curve will be more definitely determined, allowing us to more accurately predict the reservoir levels
for the upcoming dry season.
This analyis shows that an intermediate action level of 35%conservation would still provide the city adequate
water in an extended drought.
s•�
city of san tins oBispo
i�
COUNCIL AGENOA REPORT
Water Action Levels
February 20, 1990
Page 3
TOTAL CITY STORAGE
1989 RAIN, 35% CONSERVATION
19
18
17
1fi
15
14
13
n
12
u A 11
o Severe [35%)
aF 10
9
8
7 Critical (50%D
6
5
4
Minimum Pool
3
1989 1990 1991 1992 1993
1,500 AF WELL PRODUCTION
1989 ACTUAL LEVELS + ESTIMATED LEVELS MINIMUM POOL
Figure 1 Projected Reservoir Storage with 35% Conservation
Exiting Action Levels
The current Action Levels were developed based on the City reservoirs declining due to drought conditions
where as the reservoir levels become lower more stringent water conservation measures are implemented.
This works well but it does not address what is done when the reservoirs start to fill as the drought ends.
Staff feels it is equally important to build a system which allows the City to know when it is coming out
of the drought. Staff is therefore recommending that exiting action levels be adopted as guidelines for when
the reservoirs start to fill. The exiting action levels are approximately half way points between action levels.
This provides a conservative approach so that one action level is not exited to soon and would have to be
reinstituted if there were minor changes in the City's water situation.
s•3
011411F§► city of san tuis owpo
COUNCIL AGENOA DEPORT
Water Action Levels
February 20, 1990
Page 4
AMEND ANNUAL WATER OPERATIONAL PLAN
In order to implement the recommended changes to the action levels, it is necessary to amend the City's
Annual Water Operational Plan. Attached is a resolution which will incorporate the following recommended
changes:
1. Redefine Minor Action Level as 3.0 years of supply,less annual well production plus the minimum pool
and change.
2. Retitle 25% conservation level to Serious Action Level.
3. Add a 35% conservation level entitled Severe Action Level which is defined as 1.5 years of supply, less
well production plus the minimum pool.
4. Add Exiting Action Levels.
5. Establish the recommended methodology for calculating the action levels using fixed annual water
consumption amounts.
RECOMMENDATION
Adopt the attached resolution which will modify the Annual Water Operational Plan and adjust the City's
Water Action Levels.
Attachments: Draft Resolution
Action Levels Chart
i
RESOLUTION NO. (1990 SERIES)
A RESOLUTION OF THE COUNCIL OF THE CITY OF SAN LUIS OBISPO
AMENDING THE ANNUAL WATER OPERATIONAL PLAN
AND POLICY STATEMENT (Amends Resolution #5692)
WHEREAS, the City of San Luis Obispo is desirous of a planning procedure and policy
statement regarding its water use, and;
WHEREAS, the adopted Annual Water Operational Plan -and Policy Statement has
implemented a number of changes to better manage water;the most precious of all resources the City
of San Luis Obispo provides it citizens, and;
WHEREAS, the Water Action Levels monitor water resources and implement water
conservation measures.
NOW THEREFORE be it resolved that the City Council amends the Water Action Levels as
follows:
1. Redefine Minor Action Level as 3.0 years of supply, less annual well production plus the
minimum pool.
.2. Retitle 25% conservation level to Serious Action Level.
3. Add a 35% conservation level entitled Severe Action Level which is defined as 1.5 years of
supply, less well production plus the minimum pool:
4. Add the Exiting Action Levels as established.
5. Establish the recommended methodology for calculating the action levels using fixed annual
water consumption amounts.
On motion of , seconded by ,
and on the following roll call vote:
AYES:
NOES:
ABSENT:
the foregoing Resolution was passed and adopted this day of_, 1990.
MAYOR RON DUNIN
ATTEST:
CCITY CLERK PAM VOGES
Resolution No. (1990 Series)
C
APPROYLIX
CITY AD NISTRATIVE OFFICER
TT
UTILITIES DIRECTOR
O
i
ACTION LEVELS
City of San Luis Obispo
January 1990
Action Level Pini i n Storage IA--Fl—
Entering Exiting
Action Levels Action Levels
MAX STORAGE Total City's storage in
both Salinas and Whale Rock 45,630
Reservoirs
MINOR 3.0 years of supply less annual
well capacity plus minimum pool 22,800 259800
(5% conservation*)
MODERATE 2.5 years of supply less annual
well capacity plus minimum pool 18,500 21,600
(IN conservation*)
SERIOUS 2.0 years of supply less annual
well capacity plus minimum pool 13,800 16,500
(2596 conservation)
SEVERE 1.5 years of supply less annual
well capacity plus minimum pool 109000 12;200
(35% conservation)
CRITICAL 1.0 years of supply less annual
well capacity plus minimum pool 6,900 8,700
(50% conservation)
The storage levels are based on a base year consumption of 8,050 AFY and then a reduced
consumption based on the:appropriate conservation goal for each action level, -1 jk0 AFY of
well production and a minimum pool value of.3,100 AF.
Entering Action Levels are the levels at which the next more stringent conservation goal is
to be implemented as reservoir storage decreases.
Exiting Action Levels are the levels which the conservation goals are relaxed as reservoir
storage increases.
*Voluntary conservation, all others are mandatory.
�j
t�
Mfl: AGENDA
1aA ITEM # -
IIII�I Ill�n � SII
Cl O
SAn luisoil
SPO
955 Morro Street • San Luis Obispo, CA 93401
C
February 16, 1990
MEMORANDUM
T0: City CouncilJ,
VIA: John Dunn, City Administrative OfficerJ
FROM: William T. Hetland, Utilities Director
SUBJECT: Water Action Levels Backup Material
Attached for your review is backup material used to develop the
Water Action Levels which is on the Council Agenda for February
20, 1990.
If you have any questions, please contact meat extension 215.
Thank you.
O
R E4VED
EB�0 990
Cm CLERp
SAN LUIS OSISpo.CA
WTH:bja
Attachments
S '/
- CHRONOLOGY OF CORRECTING RESERVOIR LEVEL PROJECTIONS
_ 1. Original Projection
Problem: Cal Poly included in SLO demand for some months.
Well production set 250 AF/month.
Result: Graph indicated 35 and 50% possible, seen in review by Ken Hampian, Mike
Dolder and Utilities only. '
2. Wells changed to 200 AF/month.
Problem: Cal Poly demand still in SLO numbers. This is graph seen by Peg Pinard. In
addition, action levels set at old numbers.
Result The decrease in well production caused an increase in reservoir use, however
model still showed 35 - 50% conservation possible.
3. Cal Poly demand analyzed and allocated appropriately. Net effect for 1987 SLO demand- a
slight decrease; for 1989 Other Release, a larger increase.
Problem: 1. Entire model analyzed and we determined well production was incorrectly
accounted in model. The correction was to remake model where so that well
production was subtracted from SLO City Demand. This caused a huge
decrease in net reservoir demand; conservation factor set to 35% for entire
analysis.
2. Because of new analysis, fixed 1987 SLO demand was determined and new
water action levels were computed.
Result Graph of new model showed new severe action level being entered at end of 1990
and critical action level reached at end of 1992.
4. Month end results for both reservoirs and well production became available Wednesday
January 31.
Problem: Staff immediately revised well production to 1,500 AF/year (125 AF/month).
Comparison of model to January actual levels showed the model was over-
projected reservoir levels by a total of nearly 200 AF.
Result January results were entered into the model and the graph now showed critical
action level occurring in late 1992.
`MPUTING RESERVOIR LEVELS
# NAME OF COLUMN DESCRIPTION
1 Beginning of Month Measured volume of reservoir
SLO City Demand Pipeline releases to SLO, excluding all other releases, as
measured at the reservoir meter
3 Other Release Salinas - includes live stream releases, releases to Cal Poly and
any spillway discharge, as measured at the reservoir
Whale Rock - includes all of the above plus CMC
4 Total Release [Col 21 +[Col 3]
5 Reservoir Surface Acreage of reservoir surface, computed by a formula derived
by engineers that built dam
6 Inches Pan Evaporation Evaporation as measured in a pan
7 Feet Pan Evaporation [Col 6] divided by 12
8 Evaporation Factor A factor which correlates pan evaporation to the evaporation
from the reservoir
9 Reservoir Evaporation [Col 51 X [Col 7] X [C61 8] gives the total evaporation from the
reservoir
10 Inches Pan Rainfall Measured Rainfall
11 Feet Pan Rainfall [Col 10] divided by 12
12 Reservoir Rainfall [Col 5] X [Col 11] gives the total rainfall at reservoir
3 Rainfall - Evaporation [Col 121 - [Col 9] gives the net result of rainfall and
evaporation for the month
14 Total Outflow [Cot 4] +[Col 13] gives the total amount of measured water
changes
15 Unmeasurable Inflow [Col.16] - [Col 141 the difference between Total Outflow and
Measured Net Change in Volume
16 Net Change Volume [Col 171 - [Col 1]
17 End of Month Measured Reservoir Volume
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CON- TTING MODEL RESERVOIR LEVEL` -
# NAME OF COLUMN DESCRIPTION
1 Beginning of Month Volume of reservoir (actual levels for January, February 1990)
2 SLO City Demand Pipeline releases to SLO, excluding all other releases, at 1987
-level (Acual level for January, 1990)
3 35% Demand Savings [Col 2] X 35% conservation = the amount of water saved by
conservation
4 Net Demand [Col 2] - [Col 31 the amount of water consumption by SLO
5 Well Production Acre-Feet per month of well production (January 1990 actual)
6 Net Reservoir Demand [Col 4] - [Col 5] the amount of water that must be supplied by
the reservoir to meet demand above the amount supplied by the
wells
7 Other Release 1989 releases to all other reservoir users
Salinas - includes live stream releases, releases to Cal Poly and
any spillway discharge, as measured at the reservoir
Whale Rock - includes all of the above plus CMC (actual levels
for January, 1990)
8 Total Discharge [Col 6] + [Col 7] all measured releases
9 Surface Area Acreage of reservoir surface, computed by a formula derived
by engineers that built dam
10 Inches Pan Evaporation Evaporation as measured in a pan, model set to 1989 level
11 Feet Pan Evaporation [Col 101 divided by 12
Evaporation Factor A factor which correlates pan evaporation to the evaporation
from the reservoir
13 Reservoir Evaporation [Col 9] X [Col 11] X [Col 121 gives the total evaporation from
the reservoir
14 Inches Pan Rainfall Measured Rainfall, set to 1989 level
15 Feet Pan Rainfall [Col 14] divided by 12
16 Reservoir Rainfall [Col 91 X [Col 15] gives the total rainfall at reservoir
17 Rainfall - Evaporation [Col 16] - [Col 13] gives the net result of rainfall and
evaporation for the month
18 Total Outflow [Col 8] + [Col 171 gives the total amount of measured water
changes
19 Unmeasurable Inflow the difference between Total Outflow and Measured Net
Change in Volume set at 1989 level
20 Net Change Volume [Col 21] - [Col 11
21 End of Month [Col 11 + [Col 18] + [Col 19] Resulting Reservoir Volume
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City of San Luis Obispo
Proposed Action Level. Revisions
Conservation Level ($) 0 5 15 25 35 50
Assumptions
Annual Consumpti 8050 7648 6843 6038 5233 4025
Well Production 1500 1500 1500 1500 .1500 1500
Minimum Pool 3100 3100 3100 3100 3100 3100
Reservoir Storage (AF)
Max Storage (0%) 45630
Minor (5%) 22800 21600
Moderate (15%) 18600 16500
Severe (25%) 13800 12200
Extreme (35%) 10000 8700
Critical (50%) 6900 5700
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