HomeMy WebLinkAbout1985-04-23; City Council; 8152; Sewer master plan, fiancial analysis and policy,-
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SEWER MASTER PLAN, SEWER CONSTRUCTION \I FL2 CITY ATTY
TITLE
FINANCIAL ANALYSIS AND POLICY ON SEWER
- CITr")F CARLSBAD - AGENDP-ILL ' fly,w&& Wk
IClTY MGR., I 3EPT. ENG I TRUNK LINE CONSTRUCTION
RECOMMENDED ACTION:
1. Adopt the "Sewer Master Plan" report and the "Interceptor and Trunk Sewer
System Master Map" both prepared by Neste, Brudin & Stone, dated June,
1984 as the working sewer plan for the City of Carlsbad sewer service
area.
2. Adopt Council Policy Statement No. dc , Sewer Master Plan,
Financing and Construction of Facilities, which sets forth the policy on
which facilities will be paid for by the City from the sewer connection
fee.
3. Adopt Resolution No. 79 revising the Calavera Hills sewer drainage
basin.
ITEM EXPLANATION
The firm of Neste, Brudin & Stone was retained to prepare a Sewer Master Plan
of the City's sewer service area which is approximately everything north of
Batiquitos Lagoon and Alga Road. (1) a
report identifying six alternatives and the recommended sewer trunk line
system and the capital costs of that system; (2) a computer model which will
run on the City's HP 3000 computer and may be updated by City staff; and (3) a
Master Map showing the recommended sewer trunk system. Copies of the Sewer
Master Plan report and Master Map are on file in the City Clerk's office and
the Engineering department. A summary of the Sewer Master Plan is included as
Part One of the attached Staff Report.
The City has received three products:
The scope of work of the Neste, Brudin & Stone report included only the cost
of the ultimate sewer trunk line system and pump stations. The Engineering
department prepared a financial analysis (Part Two, of the attached Staff
Report) which includes the costs of the sewer trunk line system and adds the
sewer plant expansions and estimated future revenue.
On July 1, 1980, Council adopted Resolution No. 6226 creating the limits of
the Lake Calavera Hills Sewer Service Area as part of its sewer allocation
plan. Neste, Brudin & Stone's report found that the service area will
generate more flow than the Calavera Hills plant can handle. This is
primarily because the earlier assumption was that large areas would be estate
lots with septic tanks. Therefore, staff is recommending a resolution to
change this service area to coincide with that shown in the Sewer Master Plan.
The service area would then consist of the Calavera Hills Master Plan area
plus the land surrounding the Calavera Lake.
Based on the available revenues, staff recommends the City pay for the
following :
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c PAGE 2 OF AGENDA BILL NO. 77'
1. All sewer treatment plant expenses.
2. All sewer trunk line or pump station upgrades or replacements.
3. All upgrades or new trunk lines or pump stations jointly owned with
other agencies.
4. New sewer trunk line and pump station to be built in Cannon Road from
1-5 to the east end of Aqua Hedionda Lagoon.
Developers would pay for all other trunk lines and all local sewer lines
within the developments.
FISCAL IMPACT
In round numbers, revenues and costs are:
Total Future Revenue $ 33,000,000
City Cost $ 30,000,000
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Projected Reserve $ 3,000,000
Total Project Costs $ 39,000,000
City Cost $ 30,000,000
Developer Costs $ 9,000,000
All costs and revenues are in 1984 dollars. It is recommended that the sewer
connection charge be revised as construction costs escalate in the future so
that it will always be sufficient to pay for required improvements. Staff
will return with an ordinance at a later date.
EXHIBITS
1. Adopt Council Policy Statement No. 35- , "Sewer Master Plan,
Financing and Construction of Facilities."
2. Adopt Resolution No. 7793 revising the Calavera Hills sewer drainage
basin.
3. Sewer Master Plan Staff Report dated April, 1985.
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C .'Y OF CARLSBAD
COUNCIL POLICY STATEFENT
General Subject: SEWER MASTER PLAN
Specific Subject: FINANCING AND CONSTRUCTION
OF FACILITIES
BACKGROUND:
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-01icy No. 35
Date Issued 4/23/85
Effective Date 4/23/85
Cancellation Date
Supersedes No. N/A
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The City has had an unwritten policy that the City would pay for sewer
treatment plants, sewer trunk line upgrading and facilities owned jointly with
other agencies. All new sewer trunk lines and lines within subdivisions were
to be paid for by developers. Past actions indicate that this had been a
consistent policy.
The City has now completed a Sewer Master Plan Staff Report, dated April 1985
which has determined sewer line sizes and locations, future revenue and costs
and sets out a plan for what the City should pay.
PURPOSE :
To establish a written Council policy on payment for facilities to enable
staff to prepare appropriate five-year Capital Improvement Programs.
To communicate to developers Council policy regarding the requirement that
they pay for sewer trunk lines and local sewer lines within subdivisions.
POL ICY:
The City shall pay for the following facilities from the Sewer Capital
Construction Fund:
1. Encina Phase IV and V treatment plant expansion and EDL line and
reclamation at Calavera Hills treatment plant.
2. All sewer trunk lines identified in the Sewer Master Plan to be
upgraded or replaced.
3. All pump stations identified in the Sewer master Plan to be upgraded or replaced.
4. All upgrades or new trunk lines and pump stations which are jointly
owned facilities with other agencies.
COUNCIL POLICY STATEMENT
SEWER MASTER PLAN
FINANCING AND CONSTRUCTION
OF FACILITIES
General Subject:
Specific Subject:
Copies to: City Council, City Manager, City Attorney, Department and
Division Heads, Employee Bulletin Boards, Press, File
Date Issued
Effective Date
11 /33/95
6/73/95
Cancellation Date ---
Supersedes No. N /A
5. New South Aqua Hedionda (Cannon Road) trunk line from Vista-Carlsbad
line east to (and including) pump station. This line is included
because there is no land that can be developed'adjacent to it and
because it serves an area much greater than any one development or
master plan.
Except for the above, all new sewer trunk lines - regardless of location - and
all sewer lines within a development shall be installed by the developer
at his sole expense.
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The City Council adopted the Sewer Master Plan report and the Interceptor and
Trunk Sewer System Master Map prepared by Neste, Brudin & Stone, dated June,
1984, as the working sewer plan for the City of Carlsbad sewer service area.
PROCEDURE: .--
I.. Specific sewer trunk lines to be built by developers and the estimated
costs are contained in Table 2, Exhibit E of the Sewer Master Plan Staff
Report dated April 1985.
2. Estimated future sewerage flows, pipe sizes and pipe capacities are
contained in the Sewer master Plan report dated June 1984 by Neste, Brudin
& Stone.
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RESOLUTION NO. 3993
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF
CARLSBAD, CALIFORNIA, REVISING THE BOUNDARIES
OF THE LAKE CALAVERA HILLS DRAINAGE BASIN.
WHEREAS, the City Council adopted Resolution No. 6226 on July 1, 1980
approving boundaries of the Lake Calavera Drainage Basin; and
WHEREAS, the City Council desires to approve a Sewer Master Plan
vhich recommends that the Lake Calavera Hills Drainage Basin be reduced in
3ize to conform to the treatment plant capacity;
NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of
Iarlsbad, California, as follows:
1. That the above recitations are true and correct.
2. The boundaries of the Lake Calavera Hills Drainage Basin are
tndicated as Area 3 as shown on Exhibit D, Drainage Area Map contained in the
iewer Master Plan Staff Report dated April, 1985.
PASSED, APPROVED AND ADOPTED at a regular meeting of the Carlsbad
:ity Council held on the - 23rd day of A3?ril , 1985 by the following
tote, to wit:
AYES: Council Nmbers Casler, Lewis, and Chick
\TTEST : MARY H. d4SLER, Mayor
\LETHA L. RAUTENKRANZ, City Clerd-
SEAL )
CITY OF CARLSBAD
SEWER MASTER PLAN
STAFF REPORT
Prepared By
ENGINEERING DEPT.
CITY OF CARLSBAD
APRIL 1985
CITY OF CARLSBAD
SEWER MASTER PLAN
STAFF REPORT
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Prepared By:
Engineering Department
City of Carlsbad
April, 1985
SEWER MASTER PLAN
TABLE OF CONTENTS
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EXECUTIVE SUMMARY
INTRODUCTION
PART ONE: SEWER TRUNK SYSTEM
PART TWO: FINANCIAL ANALYSIS
PART THREE: RECOMMENDATIONS
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EXHIBITS
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EXHIBIT A - ASSUMPTIONS
EXHIBIT B - MAJOR TRUNK LINES
EXHIBIT C - MAJOR TRUNK LINES MAP
EXHIBIT 0 - DRAINAGE AREA MAP
EXHIBIT E - DETAILED SEWER LINE COSTS
EXHIBIT F - BIBLIOGRAPHY
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SEWER MASTER PLAN
EXECUTIVE SUHMARY
The Sewer Master Plan provides the information needed to develop
an adequate sewer system for the City sewer service area as it
builds out to its ultimate population. It consists of:
1. Land use analysis.
2. Sewage flow calculations.
3. Sewer trunk line and pump sizing.
4. Cost estimate.
5. Responsibility determination (who pays). 6. Revenue analysis.
Important Note: This Sewer Elhster Plan is only for the City sewer
service area which does not include areas in the
City served by the Leucadia County Water District
or San Harcos County Water District (generally the
La Costa area).
LAND USE ANALYSIS
The Engineering Department measured the areas of the General Plan
by land use type as of 1981 and determined each type of land use
by acres:
11,328 acres of Residential
1,392 acres of Industrial
3,393 acres of Commercial
Residential density was assumed to be at the midpoint of the
General Plan range, e.g., 10 - 20 range used 15 dwelling units
per acre. This analysis resulted in a buildout population of the
sewer service area of 124,000 (does not include Leucadia and San
Marcos sewer areas). This estimate is about 25% higher than the SANDAG School Population Study which estimated 98,000 for the
same area.
SEWAGE FLOW CALCULATIONS
Sewerage flows were estimated for each type of land use. Where
possible, actual water meter readings were used, otherwise
interpretations of meter readings were used.
Assumptions: 1 person (residential) = 100 gallons per day.
1 acre industrial (PI) = 1,200 gallons per day.
1 acre commercial (C) = 1,000 gallons per day.
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Detailed formula to determine amount of sewage produced by
various land uses appears as Table 1 on page 2-2 of the Sewer
Master Plan Report by Neste, Brudin & Stone dated June, 1984 and
is attached as part of Exhibit "A".
SEWER TRUNK LINE AND PUMP SIZING
Future sewer flows were established from the above data for each
local drainage basin in the city based on land use analysis.
Trunk lines and pump stations were located to maximize gravity
flow and were sized to accomodate flows.
These calculations are presented in detail in Table 3 of the
Neste, Brudin & Stone report and are shown graphically in that
report on Map 1: Master Map. Exhibit C, attached, shows major
trunk lines.
COST ESTIMATE
Based on the 1984 Construction Cost Index, the Sewer Master Plan
report estimates the following costs to build the proposed sewer
system:
Treatment Plants $18 million
Encina - $13 million
Calavera - $5 million
Pipelines and Pumping $21 million -
TOTAL $39 million
RESPONSIBILITY DETERMINATION (WHO PAYS)
The current policy is that the City will pay for:
Treatment plant expansion.
Facilities built jointly with other sewer agencies.
Replacement and upsizing of existing lines and pumps.
New sewer lines within dev.elopments will be paid for by the
developers.
Based on these policies, the cost of sewer facilities will be
allocated as follows:
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CITY PROJECTS:
Encina & Calavera Treatment
Trunk upgrading
Pump Station upgrading
Joint agency facilities
Cannon Road trunk
SUBTOTAL
DEVELOPER PROJECTS:
Trunk sewers
Pump Stations
SUBTOTAL
TOTAL COST
$18 million
$ 1 million
$ 2 million
$ 6 million $3 million
$30 million
$ 8 million $2 million
$ 9 million
$39 million
REVENUE ANALYSIS
Future sewer connection fees ($1,000 per EDU) will generate $33
million which is sufficient to cover the City's estimated $30
million cost.
At buildout, the City will have 53,000 EDU's or 13 million
gallons per day of sewage flow. Current flow at Encina is 17,000
EDU's or 4 million gallons per day.
53,000 EDU Buildout Flow
-17,000 EDU Current Flow
36,000 EDU Future Flow
36,000 X $I,OOO/EDU = $36 million
Less Calavera Credit -$ 3 million
Future Revenue $33 million
SEWER MASTER PLAN
INTRODUCTION
In August, 1983, the City Council awarded a contract to the firm
of Neste, Erudin and Stone, Inc. to prepare a sewer master plan
for the City sewer service area.
There were several reasons why a new master plan was needed.
Since the Brown and Caldwell plan of 1976 was written, the
concept of satellite sewer plants was developed and the Calavera
Hills plant was built. The service area of this plant has
undergone changes and it appeared that the eastern portion could
better be served by Encina. Finally, development was now much
better known and more specific sewer system data was needed. .-
Neste, Erudin and Stone, Inc. completed a Sewer Master Plan
report, a trunk sewer system map and a computer model in June,
1984. The report is a technical explanation of the procedures
used in developing the master plan. A summary of the report is
presented here. The full report is on file in the City Clerk's
Office and the Engineering Department.
The Engineering Department prepared a financial analysis of the
master plan. This analysis compared anticipated revenues with
estimated construction costs. The analysis and recommendations
are contained in this report.
Adoption of the Sewer Master Plan, Council Policy Statement and
recommendations contained in this report will provide the frame
work necessary to ensure an adequate sewer system will be planned
for and financed from now through buildout of the City.
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SEWER MASTER PLAN
PART ONE: SEWER TRUNK sYsTEn
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PURPOSE
1. To evaluate several different alternatives on how to provide
sewer within the City’s service area.
2. To choose the best alternative and adopt a master plan.
3. To develop a computer model so that the master plan could be
easily updated to reflect actual development or as land use
changes occur.
.- 4. To determine the capital costs of the trunk lines as a basis
for the financial study.
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ALTERNATIVES
In setting up the Master Plan and alternatives, the City sewer
service area was divided into seven drainage areas. EXHIBIT B
lists the major trunk lines in each area and EXHIBIT C is a map
showing these drainage areas. The alternatives primarily revolve
around how to sewer Areas 3 (Calavera Hillsland 5 (South Aqua
Hedionda).
1. Major flows from Areas 3 and 5 to North Aqua Hedionda
(Kelly/Park Drive Line). Calavera Hills Plant not used.
2. Major flows from Areas 3 and 5 routed to South Aqua Hedionda
(Cannon Road Line). Calavera Hills Plant not used.
3. Flows to Calavera Hills Plant from Calavera Master Plan Area
and from northeast portion of Area 5.
4. Flows to Calavera Hills Plant from Calavera Master Plan area
only; 911 of Area 5 to Cannon Road Line.
5. Flows from entire Palomar Airport Basin go to Palomar Sewer
Plant. This basin consists primarily of the central portion
of Area 5 and the portion of Area 6 north of Palomar Airport
Road.
6. Flows from Palomar Airport Basin, except the portion within
Area 5 east of El Camino Real, go to Palomar Sewer Plant.
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Alternative No. 4 was selected because it is the most economical
from both a capital cost and a maintenance and operation point of
view. This alternative is consistent with recommendations made
in the Brown and Caldwell report of 1976. The area within the
Calavera Hills Basin will be reduced so that flows remain within
the plant's capacity. Flows from the remaining area in that
basin and along the south shore of the Aqua Hedionda Lagoon will
go into the Cannon Road Sewer Line. Flows from the portion of
Area 5 east of El Camino Real had been projected to go into the
Palomar Joint Line requiring the City to have a maximum capacity
of 20.34 MGD in the Palomar Line. With this alternative, the
City's requirement in Area 6 is only 14.76 MGD, with 3.0 MGD flow
projected to go in the existing Buena Line and 11.76 MGD in the
new Palomar Joint Line.
Certain assumptions were made in developing this Master Plan and
in selecting Alternative No. 4. These assumptions are listed in
EXHIBIT A.
COSTS
Overall costs for all new lines and all line upgrades were
estimated. These estimates are preliminary and intended only for
use in analyzing Sewer Master Plan alternatives and developing a
financial plan. Exact costs will require a detailed design of
each line to provide the exact pipe size and slope (affected by
Developers' grading) and to determine whether an existing
pipeline should have a new line parallel to it or be entirely
replaced by a larger line.
A policy decision must be made to determine which, if any, lines
should be Capital Projects constructed by the City. Those that
are not will be the responsibility of the Developer.
Recommendations are made in Part Two of this Report, Financial
Analysis.
PHASING
A phasing plan has been included in the report by the Consultant.
This phasing was done solely to get some idea of the long-term
capital cash flow required. Actual phasing will depend on
development activity which is in a constant state of change. The
usefulness of the Master Plan is that when a Developer wishes to
proceed, he can see the extent of the line that must be
constructed and the area it will serve. This latter information
will be very useful in setting up assessment districts.
The phasing used in the report does not reflect - or even affect - developer's phasing. No harm is done to the master Plan if
developer's phasing is different as long as the proper pipe sizes
are used.
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COMPUTER MODEL
Included in the Sewer Master Plan is a computer program and all
the data used to generate the alternatives. These are capable of
being run on the City's Hewlett Packard 3000 computer. Once the
program is put on the computer and staff becomes familiar with
it, City Staff will be able to easily make changes in
assumptions, land use, or the sewer sytem and quickly determine
the effects on the Sewer Master Plan. In this manner, the Sewer
Master Plan can be constantly updated and "what-if" runs can be
made to determine the effect of a proposed land-use change on the
system prior to any discretionary action.
SUMMARY
The Sewer Master Plan should be viewed as the general plan of the
sewer sytem. It is a very useful tool to be used by both City
staff and private engineers to develop more specific plans.
ACTION REQUIRED
It is recommended that the City Council accept the Sewer Master
Plan by Minute Motion as the working document for the City's
sewer system. It is also recommended that a resolution be
adopted to formally revise the Calavera Hills' Drainage Basin.
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SEWER MASTER PLAN
PART TWO: FINANCIAL ANALYSIS
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NOTE:
A. This is an estimate of what it will take to construct
all additions to trunk lines, pump stations and
treatment plants for the City sewer service area at
General Plan buildout. Excluded are new sewer lines
(other than trunk lines) in new developments.
8. Costs assume Alternative 4 of the Sewer Master Plan is
used.
C. Each cost figure includes all of the following:
Design
Construction
Contract Administration
Inspection
Contingencies at 10%
D. All costs are stated in July, 1984, dollars. Where
costs in this report differ from the source reports
listed in EXHIBIT T, it is because the dollars have
been adjusted for inflation into current dollars.
The Engineering News Record Construction Cost Index
for Los Angeles was used to adjust for inflation. The
Engineering News Record index for Los Angeles for
July, 1984, is 5050.
CAPITAL COSTS
A. ENCINA TREATMENT PLANT:
1. Primary Treatment (assumes secondary waiver is
approved)
Phase IV & V
(Carlsbad's share) $ 6,680,000(*)*
Subtotal $ 6,680,000
* Number in parenthesis refers to source document listed in the
Bibliography found in EXHIBIT F.
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2. Primary and Secondary Treatment
Phases IV & V
(Carlsbad's share) $1 3,070,000(
Subtotal $1 3,070,000
3)
B. CALAVERA HILLS PLANT
1. Effluent disposal line (EDL) $ 760,000
2. Reclamation treatment $ 1,960,000
3. Reclamation Storage &
Distribution $ 2,520,000
Subtotal $ 5,240,000 (4)
C. PALOMAR TREATMENT PLANT
(Assume that all flow to Encina; this plant not
needed.
D. TRUNK SEWER LINES AND PUMP STATIONS
(See EXHIBIT E for detailed break down by drainage
area.)
1. Trunk sewer lines $ 9,140,000
2. Pump stations $ 5,030,000
3. Carlsbad's share of joint
facilities $ 5,900,000
Subtot a1 $20, 070,00d6)
E. TOTAL CAPITAL COSTS
(ENR Construction Cost Index for L.A. = 5050)
1. For Primary Treatment $31,990,000
Only at Encinas
(Sum of A.l, B & D)
2. For Primary and Secondary $2.3 8 0.00-g
Treatment at Encinas
(Sum of A.2, B & 0)
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c ESTIMATED REVENUE
A. SEWER CONNECTION FEE -
1. Ultimate capacity
Encina plant (Carlsbad's share) 11.8 MGD
(45 MGD total - Carlsbad 26.2%)
Calavera Hills plant 1.2 MGD
Total 13.0 MGD
13 MGD = 53,000 EDU's at buildout at 246
Gal/Day/EDU.
The population projection for buildout within the
Carlsbad sewer service area is 98,000 (this figure
is from the Public School Population Forecast done
by SANDAG for the City).
2. Existing Flow
Currently paid for connections = 17,000 EDU's (this
information is from the Utilities/Maintenance
Director).
3. Future Fees
53,000 buildout EDU
(17,000) existing EDU (as of June 30, 1984)
( 2,560) EDU Calavera Hills Credits (as of June 30,
1984)
33,440 future EDU's
At the current $1,000 fee per EDU, future available
funds are $33,440,000.
B. GROVE SUIT CREDITS (as of June 30, 1984)
1. 876 EDU at $1,000 Current $ 876,000
Price
2. Less Grove suit price 8 (236,000)
3. Credit to Grove $ 640,000
C. CURRENT SEWER CONSTRUCTION FUND BALANCE
Unencumbered (as of June 30, 1984) $ 1,700,000
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D. TOTAL REVENUE
1. Future Connection Fees $33,440,000
2. Grove Credits $( 640,000)
3. Current Fund Balance $ 1,700,000
TOTAL PROJECTED REVENUE $&500.000,
REVENUE VS. COST ANALYSIS
A. PRIMARY TREATMENT ONLY AT ENCINA
This scenario assumes the secondary waiver at Encina
will be approved and be permanent. Currently, approval
has not been granted and if it is, it will initially be
only for a five year period.
1. REVENUE (from above) $ 34,500,000
2. CAPITAL COSTS (from page 5)
3. BALANCE
$(31,990,000)
$ 2,510,000
surplus.
The conclusion is that, under this assumption all plant
facilities and all sewer trunk lines and pump stations
identified in the Sewer Master Plan can be paid for
from the sewer connection fee if the fee is adjusted
for inflation.
8. PRIMARY AND SECONDARY TREATMENT AT ENCINA
This scenario assumes that secondary treatment in
addition to primary treatment will be required at
Encina.
1. REVENUE $ 34,500,000
2. CAPITAL COSTS (from page 5)
3. BALANCE
COST AND REVENUE CONSISTENCY
$(38,380,000)
$ (3,880,000)
short fall.
All costs have been stated in July, 1984 dollars using an
ENR index for Los Angeles of 5050. In order to ensure that
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revenue projections stay consistent with construction
costs, the sewer connection fee should be adjusted annually
based on the ENR construction costs index.
CONCLUSIONS
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Due to the difficulty of estimating future costs and the
uncertainties in predicting the future actions of others
(for example, will the secondary waiver be approved by the EPA?), a conservative approach is recommended.
The assumption that the secondary waiver will not be
granted should be used. This may require reconsideration
if a permanent waiver is granted. Also a requirement that
developers complete portions of specified new trunk lines
should be formalized as a City Council policy.
RECOMMENDATIONS
It
1.
2.
3.
4.
5.
is recommended that the City pay for:
COST - ITEM -
Encina Phase IV and V treatment plant $18,310,000
expansion and EDL line and reclamation
at Calavera Hills
All sewer trunk lines identified in
the Sewer Master Plan to be upgraded
or replaced.
All pump stations identified in the
Sewer Master Plan to be upgraded or
replaced.
All upgrades or new trunk lines and
pump stations which are joint
facilities with other agencies.
New South Agua Hedionda (Cannon Road)
trunk line from Vista-Carlsbad l.ine
east to (and including) pump station.
TOTAL CITY PROJECTS:
$ 1,430,000
$ 1,500,000
$ 5,900,000
$ 2,420,000
$29.540 .oo_O_
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The above recommendations form a policy that the City will
generally pay for treatment plant expansions, all joint agency facilities, and all replacement and upsiring of
lines and pumps. All new sewer lines within developments will be paid for by the developers.
The South Aqua Hedionda line up to and including the pump
station is not within any development. This line has been
planned as a trunk line for some time - originally being
recommended in the 1976 Brown & Caldwell report. It will
serve a much greater area than a single developer or master
plan area, it serves the City's Macario Canyon Park and has no other adjacent land which could be developed and
contribute.
RECAP
Total Revenue
City Projects
Reserve Fund
Total Capital Sewer Projects
City Projects
Developer Projects
$ 34,500,000
$ 38,380,000
NOTE: The reserve fund may be used to even out potential cash flow
imbalances and provide for future unforeseen sewer line or
pump s t a t ion rep 1 acemen t s .
ASSUMPTIONS
A. No projections for future costs (as affected by
inflation) have been made. Interest on capital funds
on hand and adjustments in the sewer connection fee
will offset inflationary increases in capital construction costs.
6. Secondary treatment will be required at Encina, if not - now then in five years.
C. Carlsbad's ultimate share of the Encina Plant will be
11.8 MGD and that will be sufficient capacity at buildout.
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D. The Calavera Hills plant will be in operation with a
capacity of 1.2 MGD and will provide reclaimed water.
Also included in the cost estimate for this project is
$2,520,000 for storage and distribution of the
reclaimed water (ref. No. 4 - Reiterl.
E. The Palomar Treatment Plant will never be needed nor
built. In the event this assumption changes, the sewer
connection charge and recommendations should be
reviewed immediately as the costs of this plant are
likely to be significantly higher per EDU than those at
Encina.
F. The capacities required and the revenue generated are
based on buildout conditions under the current General
Plan and building within the middle of the density
ranges .
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SEWER MASTER PLAN
PART THREE: RECOHUENOATIONS
1. Adopt the "Sewer Master Plan" report and the 'IInterceptor
and Trunk Sewer System Master Map" both prepared by Neste,
Brudin and Stone Inc., dated June, 1984 as the working
sewer plan for the City of Carlsbad sewer service area.
2. Adopt a Council Policy Statement entitled Sewer Master
Plan: Financing and Construction of Facilities which sets
forth the policy on which facilities will be paid for by
the City from the sewer connection charge.
3. Adopt an Ordinance to provide for annual adjustments in the
sewer connection fee based on the Engineering News Record
Cost Index for Los Angeles.
4. Adopt a resolution to revise the Calavera Hills drainage
basin to match the Sewer Master Plan recommendation.
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4.
5.
6.
7.
8.
9.
EXHIBIT A
SEWER MASTER PLAN
ASSUUPTIONS
System design for buildout development according to General
Plan Land Use as of late 1981.
Residential development will average midpoint in the density
range. (For 10-20 d.u. per acre, 15 units were used.)
A peaking factor of 2.5 times average dry-weather flow was
used for trunk line capacity calculations.
New pipes follow existing ground contours 7 feet deep.
(Major grading may change pipe slopes and sizes.)
New pipes flow 75% full maximum.
Existing pipes flow 100% full maximum.
Existing pipes shown over capacity are indicated to be
replaced (rather than one added in parallel) with new pipe
flowing 75% full maximum.
Flows in jointly owned pipes from other agencies are
according to existing agreements.
Flow rates by type of land use are shown on the chart on the
next page.
- 12 -
c
EXHIBIT A
SEWER MASTER PLAN
ASSUUPTIONS (continued)
Standard Unit Flows
Sewer Generation Per Land Use
Land Use
Land Use Abbrev.
Residential - Low Density 0-1.5 D.U./Acre RL*
- Low Medium Density 0-4 D.U./Acre RLM*
- Medium Density 4-10 D.U./Acre RM*
- Medium High Density 10-20 D.U./Acre RMH*
- High Density 20-30 D.U./Acre RH*
Probable Density 1
Probable Density 3
Probable Density 7
Probable Density 15
Probable Density 25
Commercial - Intensive Regional Retail - Extensive Regional Retail - Regional Service - Community Commercial - Neighborhood Commercial - Travel Services Commercial - Recreation Commercial - Central Business District - Professional and Related - Planned Industrial - Governmental Facilities - Public Utilities
RRI*
RRE*
RS
C
N
TS*
RC
CBD
0 PI* G*
U Sewer"
U SDG&E*
1 Sewage Per
Ac r e/D ay
246 gal
738 gal
1,400 gal
3,300 gal
5,500 gal
1,000 gal
900 gal
1,000 gal
1,000 gal
750 gal
2,500 gal
1,600 gal
1,000 gal
1,000 gal
1,600 gal
1,200 gal
1,200 gal
200 gal
Schools - Elementary E* 500 gal - Junior High J* 1,100 gal
H* 1,300 gal
HC* 1,100 gal
- High School - Continuation - Private P* 1,350 gal
- Non-residential Reserve (varies) NRR Varies with
- Open Space os 0
-- probable use -
These figures developed for gross land area. If used for net land area, additional amount should be added consistent with
method of defining net area.
* Based on water meter readings. Other values based on
interpretation with use of meter readings. All values are of
average flow, For peak wet weather flow, multiply by 2.5.
- 13 -
EXHIBIT 6
SEWER WASTER PLAN
MAJOR TRUNK LINES
NOTE: See EXHItlITS C and 0 for maps.
AREA 1.
AREA 2.
AREA 3.
AREA 4.
AREA 5.
BUENA VISTA
Trunk Line: Vista-Carlsbad - joint with Vista
Status: Existing - will require upgrading for
entire length.
NORTHWEST CITY
Trunk Line: Vista-Carlsbad and other minor lines.
Status: Existing - several will require
upgrading.
CALAVERA HILLS
Trunk Line: Calavera Hills Master Plan
Status: New - not constructed. Current flows go
to Encina Plant. Future - all flows
will go to Calavera Hills plant.
NORTH AGUA HEDIONDA
Trunk Line: Kelly and Park Drive
Status: Existing - requires pump upgrading and
minor line upgrading.
SOUTH AGUA HEDIONDA
Trunk Line: Cannon Road and Sunny Creek Road
Status: New - not constructed.
- 14 -
-
AREA 6,
AREA 7.
PALOMAR AIRPORT
Trunk Line: A. Buena Line
Status: Existing
Trunk Line: 6. Palomar Jo
Vista.
.-
joint with
nu Line - jo
Buena and
nt wi,h San
Marcos, Vista, and Buena.
Status: New - currently under construction.
Trunk Line: C. Rancho Carrillo Line.
Status: New - not constructed.
NORTH BATIQUITOS
Trunk Line: “A y res -0c c i dent a1 ‘I
Status: Existing - requires pump station and
force main upgrading.
- 15 -
EXHIBIT C
SEWER MASTER PLAN
MAJOR TRUNK LINE HAP
EXHIBIT E
SEWER MASTER PLAN
DETAILED COST BREAKDOWN OF TRUNK
SEWER LINES, PUUP STATIONS AND JOINT FACILITIES
TABLE 1. BY CITY OF CARLSBAD
NOTE: Costs have been increased 15% from Neste, Brudin E, Stone
report to include design, contract administration and
inspection costs.
DRAINAGE AREA
Trunk Sewers:
1
2
PIPE NUMBER
' 547
45
52
67
118
142
143
622
623
624
671 - 674
N-800 ------
305
308
310
312
31 3
314
317
321
322
509
COST
22,924.00
90,790.00
144,706.00
18,293.00
36,751.00
38,334.00
14,654.00
69,914.00
69,458.00
74,316.00
166,747.00
85,750.00
14,959 .OO
16,967 .OO
42,166.00
32,814.00
17,570.00
19,427 .OO
6,826 .OO
43,347.00
21,211.00
374,728.00
------
- 18 -
EXHIBIT E
TABLE 1. BY CITY OF CARLSBAD
(CONTINUED)
NOTE: Costs have been increased 15% from Neste, Brudin & Stone
report to include design, contract administration and
inspection costs.
7
DRAINAGE AREA
Trunk Sewers
‘5
6
7
Pump Stat ions:
1
2
3
4 5
SUBTOTAL T
6
7
SUBTOTAL P
Joint Facilities:
1
2
PIPE NUMBER
335
336
337
342
343
P-350
P-351
------
UNK SEWERS
------
671
509 P.S. 85
337 P.S. #7
P-351 P.S.
------
------
e-----
MP STATIONS
591
592
593
594
595
596
597
598
599 P.S. 512
- 19 -
COST
109,183.00
74,929 .OO
7,769.00
135,515.00
18,500 .OO
101,930.00
523,627.00
$2.394-1 05.00
------
434,700.00
765,900.00
300,150.00
1,449,000.00
------
$2,949,750.00 -
------
4,682.00
4,966.00
2,387.00 17,055.00
110,453.00
208,656 .OO
292.854.00
EXHIBIT E
TABLE 1. BY CITY OF CARLSBAD
(CONTINUED)
NOTE: Costs have been increased 15% from Neste, Brudin E Stone
report to include design, contract administration and
inspect ion cost s .
DRAINAGE AREA
Joint Facilities:
2
3
4
5
6
7
SUBTOTAL -3
PIPE NUMBER
599/600
601
602
603
604
605
606
608
x45 ------ ------
608 P.S.
609
PSM-1 ------
INT FACILITIES
TOTAL BY CITY --r-
COST
79,624 .OO
8,562.00
33,137.00
55,674.00
36,105.00
71,976.00
280,039.00
557,794.00
774,483.00
e----- ------
1,379,241 .OO
1,850,199.00
135,448.00
$5,903,335.00
------
$11,247,145.00
- 20 -
EXHIBIT E
SEWER MASTER PLAN
DETAILED COST BREAKDOWN OF TRUNK
SEWER LINES AND PUMP STATIONS
TABLE 2. BY DEVELOPER
NOTE: Costs have been increased 15% from Neste, Brudin E. Stone
report to include design, contract administration and
inspection costs.
PIPE NUMBER 1 1 COST
P-590 ------
LCH-2
LCH-3
LCH-4
LCH-5
LCH-6
LCH-7
P-365
P-366
P-367
P-368
P-590-C
P-591 ------
P-352
P-353
P-354
P-355
P-356
P-358
P-359
P-360
113,712.00
26,058.00
22,742.00
139,012 .OO
56,856.00
34,114.00
28,060.00
90,970.00
43,299.00
79,598.00
184,782.00
125,111.00
79,598.00
66,700.00
120,474.00
146,740.00
65,384.00
61 3,640.00
85,284.00
130,289.00 39.799 L 00
------
------
- 21 -
EXHIBIT E
.-
TABLE 2. BY DEVELOPER
(CONTINUED)
NOTE: Costs have been increased 15% from Neste, Brudin E Stone
report to include design, contract administration and
inspection costs.
-
DRAINAGE AREA
Trunk Sewers:
5
6
--
PIPE NUMBER
P-361
P-362
P-363
P-364
P-369
P-370
P-371
P-372
P-373
P-374
P-375
P-376
P-377
P-378
P-379
P-380
P-381
P-382
P-250
P-252
P-253
P-255
P-257
P-259
P-260
P-261
P-262
P-263
P-264
P-265
COST
28,060.00
34,114.00
51,170.00
76,756.00
373,520.00
213,440.00
93,840.00
56,856.00
54,013.00
190,270.00
265,019.00
77,280 .OO
56,856.00
91,195.00
56,856.00
84,180 .OO
42,642 .OO
62,542.00
38,378.00
63,283.00
62,542 .OO
62,542.00
63,283.00
95,135.00
95,135.00
122,316.00
34,114.00
54,363.00
79,598.00
115.920.00
- 22 -
EXHIBIT E
GRAND TOTAL (CITY/DEVELOPER) -
TABLE 2. BY DEVELOPER
(CONTINUED)
$20,063,994.00
NOTE: Costs have been increased 15% from Neste, Brudin E Stone
report to include design, contract administration and
inspection costs.
I I COST I NUMBER I DRAINAGE AREA
I I
Trunk Sewers:
6
7
SUBTOTAL T
Pump St at ions
1
2
3
4
5
6
7 s u B T o T
P-266
P-267
P-268
P-269
P-270
P-271
P-272
P-275
P-707
P-707/708
P-720 .
P-721
P-722
P-723
lUNK SEWERS
39,799.00
63,283.00
42,642.00
59,699 .OO
115,748.00
42,642.00
71,070.00
587,259.00
817,650.00
201,239.00
93,812.00
85,284.00
156,354.00
99,498.00
$7,563,349.00
------ I ------
299,000.00
230,000.00 ------
e-----
724,500.00
$1,253,500.00-- -- ------
TOTAL BY DEVELOPER I $8,816,849.00
- 23 -
EXHIBIT F
SEWER MASTER PLAN
BIBLIOGRAPHY
1. Brown and Caldwell, SEWERAGE SYSTEM IMPROVEMENT PROGRAM,
November, 1976
2. Engineering Science, ENCINA REPORT, December, 1981
3. Lester G. Evans, ACTION PLAN FOR SEWERAGE AND RECLAIMED
WATER FACILITIES, May 1981
4. Glen Reiter, CAL-AVERA HILLS REPORT, 1982
5. Robert Wojcik, PROCEDURE IN PREPARATION OF MASTER SEWERAGE
SYSTEM PLAN, tebruary, 1982
6. Neste, Brudin br Stone, SEWER MASTER PLAN, June, 1984
This Report Prepared By
RICHARD 'H. ALLEN, JR., P.E.
Principal Civil Engineer
Engineering Department
- 24 -