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WASTEWATER MASTER PLAN
UPDATE – AIRPORT AREA
STUDY
Prepared for
City of San Luis Obispo, CA
October 01, 2009
Table of Contents City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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TABLE OF CONTENTS
LIST OF TABLES...........................................................................................................................................................II
LIST OF FIGURES.........................................................................................................................................................II
LIST OF ACRONYMS....................................................................................................................................................II
INTRODUCTION............................................................................................................................................................1
Task 1 – Project Management.........................................................................................................................1
Task 2 – Review Existing Data and Documents..............................................................................................1
Task 3 – Study Area Characteristics and Flow Loading..................................................................................2
Task 4 – Hydraulic Analysis.............................................................................................................................2
Task 5 – Prepare Update.................................................................................................................................2
1. STUDY AREA, LAND USES/ZONING, AND WASTEWATER FLOWS..................................................................1-1
1.1 Study Area....................................................................................................................................................1-1
1.2 Land Uses/Zoning.........................................................................................................................................1-1
1.3 Wastewater Flows ........................................................................................................................................1-2
2. WASTEWATER SYSTEM HYDRAULIC MODEL...................................................................................................2-1
2.1 Hydraulic Model Development......................................................................................................................2-1
2.2 Flow Loading................................................................................................................................................2-1
2.3 Hydraulic Analysis ........................................................................................................................................2-2
3. RESULTS AND COST ESTIMATES.......................................................................................................................3-1
3.1 Discussion of Results ...................................................................................................................................3-1
3.1.1 Alternatives.......................................................................................................................................3-1
3.2 Cost Estimates..............................................................................................................................................3-2
4. LIMITATIONS .........................................................................................................................................................4-1
Report Limitations .................................................................................................................................................4-1
Table of Contents City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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LIST OF TABLES
Table 1-1. Land Use Flow Category Assignment.................................................................................................1-2
Table 1-2. Flow Category Information..................................................................................................................1-2
Table 1-3. Flow Category Information..................................................................................................................1-3
Table 2-2. Proposed Gravity Pipe Lengths...........................................................................................................2-3
Table 2-3. Proposed Force Main Length and Velocity .........................................................................................2-3
Table 3-1. Buckley/Vachell Pump Calculations....................................................................................................3-3
Table 3-1a. Los Verdes Pump Calculations.........................................................................................................3-4
Table 3-5. Pipeline Costs – Primary Infrastructure...............................................................................................3-5
Table 3-5a. Pipeline Costs – Secondary Infrastructure........................................................................................3-5
Table 3-6. Lift Station Costs (Primary Infrastructure)...........................................................................................3-5
Table 3-7. Summary of Costs...............................................................................................................................3-5
LIST OF FIGURES
Figure 1. Study Area .............................................................................................................................................. B
Figure 2. Land Use.................................................................................................................................................C
Figure 3. Node Map................................................................................................................................................D
Figure 4. Proposed Pipe Diameters....................................................................................................................... E
LIST OF ACRONYMS
ADWF Average Dry Weather Flow
d/D depth/Diameter
gpad gallons per acre per day
gpm gallons per minute
mgd million gallons per day
PDWF Peak Dry Weather Flow
PWWF Peak Wet Weather Flow
WWMP Wastewater Master Plan
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CITY OF SAN LUIS OBISPO WASTEWATER MASTER PLAN
UPDATE – AIRPORT AREA STUDY
INTRODUCTION
This report presents the background and findings of Brown and Caldwell’s (BC) Wastewater Master Plan
Update – Airport Area project for the City of San Luis Obispo (City). BC was hired to perform a planning-
level analysis of existing and future sewer infrastructure to collect wastewater from the Airport Area of the
City. There were several objectives of this project, including:
• Updating the Airport Area infrastructure to plan for future growth
• Developing GIS-based land flows for accurate loading approximations
• Determining manhole assignments for future flow from parcels in the Airport Area
• Verifying future/proposed pipe alignments from 2000 Wastewater Master Plan
• Determining estimated sewer flows for Calle Joaquin lift station
• Determining additional flows for the Tank Farm lift station
• Establishing future pipe alignments to serve the Airport Area
To accomplish these objectives, land use-based wastewater flows were developed and a new hydraulic model
was built to evaluate hydraulics for the study area. The sections of this report discuss the methods used to
accomplish these objectives, and the results of the evaluation.
The Scope of Services for this project, as amended, is comprised of five primary tasks, summarized below.
Note that some of the wording below has changed since the original Scope of Services, per the City’s request.
Task 1 – Project Management
This task involves coordinating the day-to-day needs of the project. We will monitor the progress being
made toward fulfilling the contract goals and objectives, and oversee the project team to meet the scope,
quality, cost, and schedule commitments made to the City.
Task 2 – Review Existing Data and Documents
We will collect and review pertinent data and documents including, but not limited to, the following:
• GIS data (land use, parcels, road alignments, topo/contours, etc.)
• Sewer infrastructure attributes (pipe inverts, pump station details, etc.)
• Sewer improvements made in the Airport Area since completion of the 2000 Wastewater Master Plan
• Planning documents (General Plan, Specific Plans, etc.)
• As-built plans and other relevant drawings/maps
Introduction City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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• Proposed sewer alignments in the Airport Area
• Previously completed flow monitoring studies/reports
• City standards/sewer system design criteria
We will develop a data request list after reviewing the items listed above and work with the City to collect the
missing data, if any.
Task 3 – Study Area Characteristics and Flow Loading
The study area for this project involves the Airport Area as depicted on Plate 1 from the City of San Luis
Obispo Wastewater Master Plan Update dated October 2000. It is bounded approximately by the following
roads: South Higuera on the west; Buckley on the south; Tank Farm on the north; and Santa Fe on the east.
About half of the study area appears to have some level of existing development, while the other half appears
to be undeveloped.
Sewer flow rates from page 3-2 of the City of San Luis Obispo Wastewater Master Plan Update dated
October 2000 will be used for this study and will be assigned to their respective land use polygons within the
study area as identified by the data collected during Task 2. Additionally, peaking factors or curves will be
taken from information collected during Task 2 and discussions with City staff. No additional flow
monitoring or Infiltration & Inflow calculations will be performed as part of this project.
Task 4 – Hydraulic Analysis
Building upon the efforts from Tasks 2 and 3, we will develop a hydraulic model of the study area for this
project to assist in determining infrastructure recommendations. Since the location of new gravity sewer pipe
alignments significantly impact the hydraulic analysis, we will solicit the City’s input on determining proposed
piping configurations. Currently there is approximately half of the study area that appears to be undeveloped,
and we will rely on direction from the City as to probable pipe locations so that we can perform the hydraulic
analysis with the best available data at the time of this project. We will evaluate the study area under Average
Dry Weather Flow (ADWF), Peak Dry Weather Flow (PDWF), and Peak Wet Weather Flow (PWWF).
Infrastructure improvements will be sized according to City design criteria.
Task 5 – Prepare Update
Upon completion of Task 4, we will submit a Draft Report describing our assumptions and methods used,
along with our findings and associated tables and figures, as needed. After receiving City comments on the
Draft, we will revise and submit a Final Report to the City.
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CITY OF SAN LUIS OBISPO WASTEWATER MASTER PLAN
UPDATE – AIRPORT AREA
1. STUDY AREA, LAND USES/ZONING, AND WASTEWATER
FLOWS
1.1 Study Area
The study area for this project was identified by discussions with City staff and delineated using GIS data as
provided to BC for this project. Figure 1 shows the area included for this project; the gray area near the
intersection of Buckley/Esperanza was initially included in the study area, but City staff indicated these
parcels are outside of the Urban Reserve boundary and should not be included for evaluation.
1.2 Land Uses/Zoning
Land use and zoning information was used as the basis for developing wastewater flows for each parcel in the
study area. Parcels in the City’s GIS database were assigned their land use based on the General Plan GIS
data. The land use/zoning of the parcels in our study area is shown in Figure 2.
There are a total of 20 approved land uses according to the General Plan, while the 2000 WWMP identified 6
categories for the purpose of assigning wastewater flows. Since we are using parcel-based (i.e. land use-based)
flows for this project, we assigned each of the 21 General Plan land use categories one of the 6 flow
categories used in the 2000 WWMP. Table 1-1 shows the land use-based flow category assignment of the 20
General Plan land uses.
Study Area, Land Uses/Zoning, and Wastewater Flows City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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Table 1-1. Land Use Flow Category Assignment
General Plan Land Use WWMP Land Use Flow Category
Agriculture N/A
Business Park Office
Community Commercial Retail
General Retail Retail
High Densit y Residential Multi Family Dwelling
Interim Open Space N/A
Low Density Residential Single Family Dwelling
Medium Density Residential Multi Family Dwelling
Medium High Density Residential Multi Family Dwelling
Neighborhood Commercial Manufacturing
Office Office
Open Space N/A
Park N/A
Recreation N/A
Residential Neighborhood N/A
Rural residential Sin gle Family Dwelling
Services & Manufacturin g Manufacturing
Suburban Residential Single Family Dwelling
Tourist N/A
1.3 Wastewater Flows
After each parcel in the study area was assigned one of the 6 land use flow categories, unit wastewater flows
were assigned based on the “Per Unit Flow Value” from the 2000 WWMP. Unit wastewater flows per flow
category are presented in Table 1-2.
Table 1-2. Flow Category Information
WWMP Land Use Flow Category Flow Factor Flow Unit
Single Family Dwelling 190 gallons per day per dwelling unit
Multi Family Dwelling 120 gallons per day per dwelling unit
Retail 200 gallons per day per 1000 sq ft gross floor area
Manufacturing 120 gallons per 1000 sq ft gross floor area
Office 190 gallons per day per 1000 sq ft gross floor area
Motel/Hotel 120 gallons per day per room
N/A 0 N/A
Six of the 21 General Plan land use categories exist in our study area, while two of the 6 flow categories are
present. Table 1-3 shows the General Plan land use categories, flow categories, and associated flow rates for
the study area. Based on information available at the time of this study, and generally acceptable industry
standards and assumptions, it was assumed that building square footage was equal to one half of the parcel
area for flow categories dependent on building square footage, in order to determine the contributing flow
from those parcels. This assumption may be revisited in the future if the City chooses, for example when
parcels are being designed for development and specifics about building area and height are known.
Study Area, Land Uses/Zoning, and Wastewater Flows City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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Table 1-3. Flow Category Information
General Plan Land Use WWMP Land Use Flow Category Area (acres) Flow (gpm)
Business park Office 226.5 651
Open space N/A 219.3 0
Public N/A 323.3 0
Services and Manufacturing Manufacturing 343.8 624
Tourist N/A 2.5 0
Total 1,115.5 1,275
Average dry weather wastewater flows were peaked by a factor of 3.0 at each load point to simulate peak wet
weather flows, consistent with the criteria set forth in the previous WWMP. Facilities were evaluated to meet
system criteria while experiencing peak wet weather flows, discussed in more detail in the next section.
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CITY OF SAN LUIS OBISPO WASTEWATER MASTER PLAN
UPDATE – AIRPORT AREA
2. WASTEWATER SYSTEM HYDRAULIC MODEL
2.1 Hydraulic Model Development
A hydraulic model was developed for the purpose of evaluating wastewater system hydraulics for the study
area. The City’s GIS data was used as the basis for creating the piping network and establishing pipe inverts,
diameters, etc. The system-wide GIS dataset for wastewater facilities was imported into H20Map Sewer
version 8, and then facilities outside of the study area were deactivated for this project. With some extra
work, the hydraulic model could be updated for system-wide usage, should the City choose to update this
study, or perform a full master plan update in the future.
2.2 Flow Loading
Wastewater loads were allocated from parcels to geographically close manholes in the study area. Since the
wastewater network in the study area is largely future infrastructure and therefore does not exist today, load
assignments can be changed in the future at the City’s discretion. Where appropriate based on topology or
known system constraints, parcels were manually assigned to contribute flow to manholes. In areas where
parcels exist but future infrastructure does not, parcels were assigned to their closest anticipated flow
receiving manhole. The flows used in the pump calculations include the calculated manhole inflows plus
existing flows, since the new lift station at the corner of Buckley and Vachell roads will need capacity to
handle both. Figure 3 shows the manhole ID values that correspond to the calculated manhole inflows.
The parcels surrounding Horizon Rd. served by MH-1283 as shown in Figure 3 may need to be served by
MH-5023 based on topography and existing manholes with shallow inverts. A grading plan should be
developed during the preliminary design phase to determine which alignment is better for the City. The
preliminary design report should include surveying to determine the slopes available for new pipe alignments.
There is one commercial property located near the southeast corner of Buckley Road and Broad Street that
might be served by the future Buckley/Vachell lift station, but it is outside of the area being evaluated for this
report. When the City determines what this parcel will be used for, it would be helpful to determine the
additional wastewater flow that will be contributed and check that the new Buckley/Vachell lift station can
handle the extra flow.
Wastewater System Hydraulic Model City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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The proposed portions of the pipe and manhole network shown in Figure 3 was established after several
discussions and iterations with City staff, and represents a possible alignment for the wastewater system in the
study area to collect future flows. Consideration should be given to alternate pipe alignments during the
preliminary design phase to confirm the alignments proposed in this document remain valid.
Figure 3 also shows parcel assignments to manholes for flow loading purposes. Parcels are color-coded
according to the manhole to which they contribute flow. One of the most influential parcels in the study area
is assigned to manhole “MH-5023” and is estimated to contribute approximately 342 gpm, or 0.5 mgd, of
wastewater flow in the future. This is due largely in part to the zoning classification of “business park” that it
is assigned. Should the zoning of this parcel change in the future, or if the parcel is not developed as planned,
the hydraulics of the pipe network downstream of this parcel should be revisited as it could result in a
decreased cost to the City.
2.3 Hydraulic Analysis
A hydraulic analysis was performed on the study area to help determine the following items:
• Future pipe alignments and sizes
• How much flow could be expected, and where
• Adequacy of Calle Joaquin lift station area to accept additional future flows
• Additional flow discharge to the Tank Farm lift station
• How to collect wastewater flow from southwestern section of study area
The hydraulic model was used to perform the hydraulic analysis on the study area. Two scenarios were
simulated: Average Dry Weather Flow and Peak Wet Weather Flow. The scenarios contained parcels in the
study area assumed to contribute flow according to Table 1-2 and Table 1-3. Peak wet weather flows were
the determining factor in sizing pipes to handle the wastewater flow, since they were three times as great as
average dry weather flows.
Evaluation criteria used for determining pipe size and alignment are as follows:
− depth/Diameter for pipes less than or equal to 12” diameter = 0.5
− depth/Diameter for pipes greater than 12” diameter = 0.75
− minimum cover = 3 feet
− minimum velocity = 2 ft/s, with 3 ft/s desirable
− maximum velocity = 10 ft/s
− Darcy-Weisbach coefficient = 0.013
− Hazen-Williams coefficient = 110
Proposed pipe diameters for the study area are shown color-coded in Figure 4, and the lengths are
summarized by diameter in Tables 2-2 and 2-3 for gravity pipes and force mains.
Wastewater System Hydraulic Model City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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Table 2-2. Proposed Gravity Pipe
Lengths
Pipe Diameter (in) Length (ft)
83,827
10 1,487
12 5,302
14 7,381
15 2,632
Table 2-3. Proposed Force Main Length and Velocity
Pipe Diameter (in) Length (ft)Velocity (ft/s)
8 3,555 6.2
20 7,381 2.9
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CITY OF SAN LUIS OBISPO WASTEWATER MASTER PLAN
UPDATE – AIRPORT AREA
3. RESULTS AND COST ESTIMATES
3.1 Discussion of Results
At the beginning of this project, we evaluated the option of installing a pipe to follow Santa Fe Road south
from the intersection with Tank Farm Road, collecting wastewater from the area south and east of the Santa
Fe/Tank Farm Road intersection. After performing the surface analysis/overlay evaluation, we recommend
an alternative alignment coupled with changes to the Santa Fe alignment and an additional lift station (shown
in Figure 4).
Our recommendation will allow wastewater flows along Santa Fe to be collected partially by gravity sewer
along Santa Fe Road (discharging to the Tank Farm gravity sewer), and partially by gravity sewer along
Buckley Road (discharging to a new lift station at the corner of Buckley and Vachell Roads). Flows collected
by the gravity sewer along Buckley Road will be transferred by the new lift station to discharge at existing
manhole J15-11 (located at the corner of South Higuera and Prado Road).
Additionally, the gravity sewer along Buckley Road will have the ability to collect flows from the airport area
in the future (based on topography of the area), should the City experience additional unplanned infill
development if the airport expands. One of the main reasons for this change to the previously proposed pipe
alignments is the elevation increase from the corner of Buckley and Vachell Roads, to the start of the
proposed gravity pipe near the intersection of Thread and Buckley Roads. The distance is approximately
10,500 lineal feet, with an elevation difference of approximately 92 feet. This corresponds to an average slope
of approximately 0.88%, well above the desired design slope of 0.5%. This extra slope will provide the City
with flexibility during the design phase, while still maintaining the desired slope.
Finally, a new lift station, referred to as Los Verdes Lift Station, is required to divert flow from the Calle
Joaquin siphon as this existing siphon lacks sufficient capacity for additional flows and requires significant on-
going maintenance. This new lift station allows the existing siphon to be abandoned relieving the City from a
costly replacement project and defers the need to significantly upgrade the Calle Joaquin Lift Station and
associated force main hence reducing capital and O/M costs.
3.1.1 Alternatives
Alternative pipe alignments and lift station/force main configurations were discussed with City staff,
including:
• Discharging the new lift station flows to the Tank Farm lift station
Doubling the capacity of the new Tank Farm lift station will require significant modification to the
existing lift station including, but not limited to, possible enlarging of the wet well, new pumps, new
emergency generator, new power service and the replacement of a recently installed 3,700 foot force
main. Little benefit would be gained from this approach because the force main from the Buckley lift
station would be approximately the same length as the force main to discharge to the gravity sewer at
Results and Cost Estimates City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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Higuera and Prado roads. This scenario has the undesirable aspect of a lift station pumping to a lift
station.
• Discharging the new lift station flows to the existing Calle Joaquin lift station
This alternative will require the replacement of the siphon under Hwy 101 and San Luis Obispo Creek,
the Calle Joaquin lift station and force main. Replacement of the Calle Joaquin lift station will require a
larger and therefore more costly lift station than the Buckley lift station, require additional land
acquisition, and require replacement of a 4,400 foot force main. This would essentially require the
construction of two large lift stations and retain the City’s liability of having a major pipeline (siphon)
under San Luis Obispo Creek. This scenario has the undesirable aspect of a lift station discharging to
a lift station that discharges to a lift station.
It was determined that both of these alternatives had challenges that would prevent them from accepting the
additional flow collected by the Buckley Road gravity pipe. In the case of the Tank Farm lift station option,
the pumps would need to be increased by about double the capacity, resulting in more costly pumps. For the
Calle Joaquin option, it was determined that the pipe network upstream of the siphon under Highway 101
lacked sufficient capacity to handle the additional flow.
Along the Buckley Road pipe alignment, the area that appears likely to have potentially shallow depth of
cover is located around the Esperanza/Buckley Road intersection. Our planning level analysis indicates there
is about 9 feet of cover, but is worth noting as a point of attention during preliminary design phase work
based on discussions with City staff that indicated possible grading of the area might change the depth of
cover.
3.2 Cost Estimates
Cost estimates for proposed pipe in the study area were prepared for those pipes color-coded by size and
labeled with their diameters in Figure 4. The planning level cost estimates for this project are based on the
cost estimates delivered as part of the Tank Farm Lift Station and Force Main Project. Updated cost
estimates should be obtained when the City decides to move forward with any of the projects included in this
report.
The pump capacity for the new lift station at the corner of Buckley and Vachell roads was calculated as
shown in Table 3-1, and the pump capacity for the new lift station to divert flow from the Calle Joaquin
siphon (herein referred to as the Los Verdes lift station) was calculated as shown in Table 3-1a.
Results and Cost Estimates City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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Table 3-1. Buckley/Vachell Pump Calculations
Hazen-Williams eqaution:
hf =
where:hf = headloss, ft
L = pipe length, ft
Q = flow rate, gpm
C = Hazen-Williams coefficient
D = pipe diameter, in
STATIC HEAD 40.63 ft
FRICTION HEAD
L = 7381 ft
Q = 2852 gpm
C = 110
D = 20 in
hf =14.87 ft
ESTIMATE MINOR LOSSES 20.00 ft
TOTAL TDH 75.50 ft
Hp = Q*TDH
3960*Pump efficiency
Hp = 73
10.44*(L)(Q)1.85
C1.85(D)4.8655
Results and Cost Estimates City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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Table 3-1a. Los Verdes Pump Calculations
Hazen-Williams eqaution:
hf =
where:hf = headloss, ft
L = pipe length, ft
Q = flow rate, gpm
C = Hazen-Williams coefficient
D = pipe diameter, in
STATIC HEAD 12 ft
FRICTION HEAD
L = 3555 ft
Q = 967 gpm
C = 110
D = 8 in
hf =83.64 ft
ESTIMATE MINOR LOSSES 10.00 ft
TOTAL TDH 105.64 ft
Hp = Q*TDH
3960*Pump efficiency
Hp = 34
10.44*(L)(Q)1.85
C1.85(D)4.8655
The unit costs used to estimate the capital costs reflect the most recent bids received by the City on similar
projects. Tables 3-2 through 3-4 present the estimated capital costs for this project. “Primary Infrastructure”
refers to lift stations, force mains, the gravity pipes from MH-5023 and MH-5022 to the new
Buckley/Vachell lift station, and the gravity pipe upstream of the new Calle Joaquin Siphon Diversion lift
station. “Secondary Infrastructure” refers to all other gravity pipes not included in “Primary Infrastructure”.
Results and Cost Estimates City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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Table 3-2. Pipeline Costs – Primary Infrastructure
GRAVITY PIPES
Pipe Diameter (in) Length (ft) Unit Cost ($/foot) Cost ($)
10 1,487 400 594,873
12 11 400 4,207
15 2,632 400 1,052,863
Totals 4,130 1,651,943
FORCE MAINS
Pipe Diameter (in) Length (ft) Unit Cost ($/foot) Cost ($)
8 3,555 300 1,066,630
20 7,381 300 2,214,303
Totals 10,936 3,280,932
Table 3-2a. Pipeline Costs – Secondary Infrastructure
GRAVITY PIPES
Pipe Diameter (in) Length (ft) Unit Cost ($/foot) Cost ($)
8 6,128 400 2,451,300
12 5,292 400 2,116,711
Totals 11,420 4,568,011
Table 3-3. Lift Station Costs (Primary Infrastructure)
Lift Station Name Horsepower (Hp) Unit Cost ($/Hp) Cost ($)
Los Verdes 34 16,883 580,949
Buckley/Vachell 73 16,883 1,224,134
Totals 1,805,083
Table 3-4. Summary of Costs
Primary Infrastructure
Gravity Pipe $1,651,943
Force Main $3,280,932
Lift Station $1,805,083
Total $6,737,958
Secondary Infrastructure
Gravity Pipe $4,568,011
Force Main --
Lift Station --
Total $4,568,011
Grand Total
(Primary + Secondary)$11,305,969
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CITY OF SAN LUIS OBISPO WASTEWATER MASTER PLAN
UPDATE – AIRPORT AREA
4. LIMITATIONS
Report Limitations
This document was prepared solely for the City of San Luis Obispo in accordance with professional
standards at the time the services were performed and in accordance with the contract between the City of
San Luis Obispo and Brown and Caldwell dated August 14, 2007. This document is governed by the specific
scope of work authorized by the City of San Luis Obispo; it is not intended to be relied upon by any other
party except for regulatory authorities contemplated by the scope of work. We have relied on information or
instructions provided by the City of San Luis Obispo and other parties and, unless otherwise expressly
indicated, have made no independent investigation as to the validity, completeness, or accuracy of such
information.
Figure 1. Study Area City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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Figure 1. Study Area
BUCKLEY
B
R
O
A
DTANK FA R M
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LOS VERDESCREEKSIDESPITFIRESU
NFLO
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AMBROSIA MADRONEDEL SOLM A R I G O L D
ROSEMARYC A LLE D E L C A M IN O S
BOTTOMWOODM A N Z A N IT A
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SANTA FEFigure 1
San Luis Obispo WWMP UpdateAirport Area StudyµStudy Area
BC Job # 133578
Legend
Outside Study Area
Study Area
Figure 2. Land Use City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
C
Use of contents on this sheet is subject to the limitations specified at the end of this document.
C:\Projects\San Luis Obispo, City of\Sewer Master Plan Update\Deliveriables\Report\WWMP_AIRPORT_AREA_FINAL_121509.doc
Figure 2. Land Use
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NFLO
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BOTTOMWOODM A N Z A N IT A
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SANTA FEFigure 2
San Luis Obispo WWMP UpdateAirport Area StudyµLand Use Map
BC Job # 133578
Legend
Outside Study Area
business park
open space
public
serv man
tourist
Figure 3. Node Map City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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C:\Projects\San Luis Obispo, City of\Sewer Master Plan Update\Deliveriables\Report\WWMP_AIRPORT_AREA_FINAL_121509.doc
Figure 3. Node Map
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San Luis Obispo WWMP UpdateAirport Area StudyµStudy Area Pipe andManhole Map
BC Job # 133578
Legend
#Study Area Lift Stations
!Study Area ManholesGravity PipeForce Main
Figure 4. Proposed Pipe Diameters City of San Luis Obispo Wastewater Master Plan Update – Airport Area Study
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C:\Projects\San Luis Obispo, City of\Sewer Master Plan Update\Deliveriables\Report\WWMP_AIRPORT_AREA_FINAL_121509.doc
Figure 4. Proposed Pipe Diameters
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BUCKLEY TA N K FA R M
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DHIGUERA S101 N101 SEVANSHOOVERVACHELL POINSETTIA
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SANTA FE20 in15 in10 in8 in12 in12 in 8 in8 in8 in12 in 8 in8 in
8 in
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San Luis Obispo WWMP UpdateAirport Area StudyµStudy Area ProposedPipe Diameters
BC Job # 133578
Legend
#Study Area Lift Stations
!Study Area ManholesOther Pipes20" For ce Main8" Force Main15" Gravity Pipe12" Gravity Pipe10" Gravity Pipe8" Gravity Pipe 20 in