HomeMy WebLinkAbout2019-09-17; City Council; ; 2019 Potable Water, Recycled Water, and Sewer Master Plan Updates.JOINT CITY COUNCIL AND
CARLSBAD MUNICIPAL WATER DISTRICT
Staff Report
Meeting Date: Sept. 17, 2019
To:
From:
Mayor/President and City Council/Board of Directors
Scott Chadwick, City Manager/Executive Manager
CARevie~
Staff Contact: Ken Knatz, Utilities Engineering Manager/District Engineer
ken.knatz@carlsbadca.gov or 760-603-7354
Subject:
Vicki Quiram, Utilities Director/General Manager
vicki.quiram@carlsbadca.gov or 760-438-2722
2019 Potable Water, Recycled Water, and Sewer Master Plan Updates.
Recommended Action
1. · Adopt a Resolution of the City Council of the City of Carlsbad approving the 2019 Sewer
Master Plan Update, Capital Improvement Program (CIP) Project No. 5543-1.
2. Adopt a Resolution of the Board of Directors of the Carlsbad Municipal Water District
approving the 2019 Potable and Recycled Water Master Plan Updates, CIP Project Nos.
5543-2 and 5543-3.
Executive Summary
On Jan. 24, 2017, the City Council approved Resolution No. 2017-020 authorizing execution of a
professional services agreement with H~R Inc. for completion of the Potable Water, Recycled
Water, and Sewer Master Plan Updates. That same evening, the Board of Directors of the
Carlsbad Municipal Water District (CMWD Board) adopted Resolution No. 1558 approving the
same action.
The 2019 Potable Water, Recycled Water, and Sewer Master Plan Updates (Master Plans) have
been completed and present prioritized infrastructure improvement recommendations that will
provide for continued delivery of vital utility services to homes and businesses now and in the
future. The capital plans recommended in the Master Plans were developed with unique
system models that apply water demands and sewer generation rates based on land uses and
population forecasts. The system modeling considered growth projections from the 2015
General Plan, Growth Management Plan and annual Growth Management Plan Monitoring
Reports, and the San Diego Council of Governments (SAN DAG) Series 13 projections. In
addition, water usage and sewer generation values were adjusted based on water conservation
trends. The system models are scalable and baseline assumptions can be easily adjusted to
update as development in the city ebbs and flows in the future. The previous master plans were
last updated in 2012.
These Master Plans are before the City Council and CMWD Board for approval as they provide
direction to staff for implementation of the phased and orderly management of the potable
water, recycled water and sewer systems that are vital to the health and safety of the
September 17, 2019 Item #12 Page 1 of 21
community they serve. The Master Plans support the 2007 Community Values identified in the
Carlsbad Community Vision including water con~ervation, recycling and desalination, water
quality and greenhouse gas reduction. The Master Plans also support the 2007 City Council
approved sustainability guiding principle for a diverse and drought resistant water supply.
Discussion
Reliable and sustainable utility services are vital to the community in which we live and to the
environment we protect. Carlsbad Municipal Water District (CMWD) provides reliable, safe
drinking (potable) and recycled water to homes and businesses within the CMWD service area
through two intricate infrastructure systems. The City of Carlsbad operates a third
infrastructure system that collects wastewater within its service area and safely conveys it from
homes and businesses to the Encina Water Pollution Control Facility (EWPCF). A portion of the
water from EWPCF is further treated at the Carlsbad Water Reclamation Facility (CWRF) and is
redelivered to customers through the recycled water system for landscape irrigation and other
industrial-type usesthat require process water.
Over the last six years, the economic recession combined with a multiyear drought and water
conservation efforts, have resulted in significantly reduced potable and recycled water
demands and sewer flows. As the economy rebounded and extreme drought conditions
receded, the 2012 Master Plans needed to be adjusted to reflect a "new normal" in water use
behaviors and to correspond with the 2015 General Plan and the Growth Management Plan.
The result is a reduction in the total demand of water and sewer flow projections. Thus, the
capacity of these systems is becoming less of a driver for capital improvements. In contrast, the
condition of the systems has become more of a driver, as presented in the 2019 Asset
Management Master Plan, which is a separate, companion City Council agenda item. The
Master Plans provide system evaluations that assist with continued reliable wastewater,
potable water and recycled water service through build-out conditions, which are projected to
occur by 2040.
The Master Plans address the future hydraulic capacity of the systems with the following
objectives:
• Incorporate updated land uses and population forecasts using the city's General Plan,
Growth Management Plan and annual Growth Management Plan Monitoring Reports and
the SANDAG Series 13 projections
• Update and incorporate recent trends in water use and sewer generation rates
• Incorporate new water supply reliability projects including a new and closer connection to
the Claude "Bud" Lewis Carlsbad Desalination Plant and expanded recycled water service
• Develop capital improvement recommendations to maintain the city's high level of service
to its customers
Potable Water Master Plan Update
CMWD is a subsidiary district of the City of Carlsbad and provides potable and recycled water
services. CMWD's service area covers approximately 82% of the area within the city's
boundaries. Currently, CMWD purchases 100% of its potable water supply from the San Diego
September 17, 2019 Item #12 Page 2 of 21
County Water Authority (SDCWA), including approximately 17% from local desalinated water.
Current CMWD water demand is estimated at 16,900-acre feet per year (AFY), down from an
estimated 21,400 AFY in the 2012 Master Plan. By 2040, the demand for potable water is
expected to reach 20,700 AFY. This is based on an estimated increase in population of close to
10,000 people and planned commercial/industrial development in the CMWD's service area.
A total of 17 CIP projects for needed capacity increases have been recommended for the
potable water system. Improvements include the addition of new system interconnect
pipelines, storage and appurtenance improvements and upsizing of pipelines to meet fire flow
requirements. The ·estimated total for implementing all of the recommendations is $32.2
million. The recommended projects have been broken into immediate, mid-and long-term
scheduled horizons. Funds for these projects have been included in the FY 2019-20 CIP 15-year
forecast based on a recommended implementation schedule.
Recycled Water Master Plan Update
CMWD began its recycled water program in 1990 with the preparation of its first Recycled
Water Master Plan and now is a leader in the business with over 940 recycled water
connections, more than any other water district in San Diego County. One-third of the city's
water supply will be recycled water by 2021.
CMWD began Phase I of the recycled water system by building pipelines that carried recycled
water purchased from neighboring agencies, Vallecitos Water District and Leucadia Wastewater
District. Phase I was completed in 1995. Phase II included construction of the 4 MGD (million
gallons per day) CWRF, increased supply from the· Meadowlark Water Reclamation Facility
(Vallecitos) and other system improvements, including 24 miles of additional recycled water
pipeline. Phase II was completed in 2008. In recognition of the value of the program in terms of
potable water conservation and as a reliable drought-resilient local source of water for CMWD
customers, the state has provided CMWD with over $1 million in grant funding to implement its
recycled water system.
Phase Ill was started in 2012 and included a 3 MGD expansion of CWRF and 11 miles of
additional recycled water pipeline. It was anticipated that Phase Ill would increase demand for
recycled water to 7,100 AFY, but due to the drought and economic downturn, demand has
been lower than expected. Phase Ill is nearing completion with the final phases of planned
pipeline and reservoir construction scheduled for completion in the next fiscal year. This project
will continue CMWD's effort to reduce potable water demand by many of the large irrigation
water customers adjacent to the build-out of the system that will be converted to recycled
water.
The Recycled Water Master Plan Update recommends an estimated capital cost of $28.6 million
to build-out the remaining segments of the recycled water distribution system in the city and
prepare for potential extensions into the City of Oceanside, Vista Irrigation District and
Vallecitos Water District. Over the years, these agencies have approached CMWD multiple
times to discuss extending the CMWD recycled water system into their areas. The plan
recommends that CMWD target four potential golf courses that are just outside the CMWD
service area and within the agency districts mentioned above. Before moving ahead, staff will
September 17, 2019 Item #12 Page 3 of 21
conduct a preliminary evaluation of these projects to determine project feasibility including
benefit/cost ratio analysis and then return to the CMWD Board for policy direction.
Sewer Master Plan Update
The City of Carlsbad provides wastewater collections services to approximately 74% of the area
within city limits. All wastewater flows are conveyed to the EWPCF for treatment and then
delivered to the adjacent CWRF for reuse or disposed of through an ocean outfall. The existing
average dry weather flows for the Carlsbad Sewer Service Area total approximately 6.24 MGD,
down from 7.9 MGD in the 2012 Sewer Master Plan.
Growth management data from the 2015 General Plan projects that approximately 10,000
people will be added to the Carlsbad Sewer Service Area at bu ildout, with most of the growth
due to single family residential customers. Future average daily wastewater flows are projected
to increase by approximately 2 MGD for a total of 8.31 MGD, which is 1.69 MGD less than
projected in the 2012 Master Plan, primarily due to water conservation.
Five collector system projects for increased capacity have been identified based on model
results for peak wet weather flows. The total estimated cost for these projects is $970,000.
Funds have been included in the FY 2019-20 CIP 15-year capital forecast for these projects. It is
important to note that these capacity improvements are being recommended due to
exceedance of system design criteria and not due to an impending sanitary sewer overflow
under the build-out modeling scenario. Therefore, additional flow monitoring and analyses will
be completed to confirm peak wet weather flows and capacity at specified locations prior to
initiating each project.
The city is a member of the joint powers authority for the Encina Wastewater Authority
(Encina). The total estimated cost for the five sewer collector system projects shown above
does not include the city's share of Encina's capital outlay plan, estimated at $95 million over
the next 10 years. However, these costs are reflected in the city's FY 2019-20 CIP 15-year capital
forecast and are also incorporated into staff's cost of service study and financing strategy.
Encina's capital plan impacts wastewater rates.
Fiscal Analysis
The three utilities divisions (potable water, recycled water and wastewater) each have their
own separate dedicated budgets, known as "enterprise funds." Enterprise funds exist to
provide a specific service, and they are funded by ratepayers (customers) and user fees. The
enterprise fund establishes a separate accounting and financial reporting mechanism for
municipal services for which a fee is charged in exchange for those services. The monies
collected for providing the specific services cannot be used for anything else. The ratepayers
also own all of the infrastructure associated with the service being provided. For example,
wastewater is a service the city provides its customers. The wastewater ratepayers own all of
the wastewater infrastructure, rather than the city. The city is responsible for managing the
enterprise fund and providing the service.
September 17, 2019 Item #12 Page 4 of 21
The costs associated with recommended projects in the Master Plans are included in the FY
2019-20 CIP 15-year capital forecast and have been incorporated into the 2019 Cost of Service
Study, which is on the same City Council agenda as this report.
During the recent Master Plan Updates, staff analyzed the resources needed for future master
plan implementation. The water, recycled water and wastewater programs are three separate
enterprise fonds with a total operating budget of approximately $74.5 million and an annual CIP
budget of $22 million. A senior management analyst will be needed in FY 2021 to assist with
plan implementation and billing, budget, cost of service studies and rate analysis duties
resulting from the redistribution of workload between the finance and utilities departments.
Staff will request one new position as part of the FY 2020-21 budget cycle. This is provided for
information only at this time.
Next Steps
If approved, staff will begin to implement the Master Plans.
Environmental Evaluation (CEQA)
The city and CMWD are proposing an update to the existing Master Plans. The existing Master
Plans, adopted in November 2012, were evaluated in a program environmental impact report
(PEIR 12-01) prepared and certified by the city. At that time, the PEIR considered and analyzed
CIP projects proposed as part of an update to the city's Water Master Plan and Sewer Master
Plan (2003) and Water Reclamation Master Plan (1992).
The city and CMWD are proposing additional CIP projects be added to the existing Master Plans,
in addition to some updates and revisions to the CIP projects considered in the 2012 PEIR. An
addendum was prepared in accordance with the California Environmental Quality Act (CEQA)
(Public Resources Code § 21000, et. seq.) and the CEQA Guidelines, as amended (California
Administrative Code, Title 14, § 15000, et. seq.).
The city planner has reviewed the project changes, and the revised Master Plans' PEIR addendum
prepared by HDR and found that none of the requirements in CEQA Guidelines Sections 15162
and 15163 for a subsequent or supplement EIR have been triggered, as the addendum explains.
Therefore, the revised project is within the scope of the adopted PEIR and use of an addendum
to document the project changes is appropriate. CEQA Guideline Section 15164 also notes an
addendum need not be circulated for public review but may simply be attached to the PEIR.
Public Notification and Outreach
This item was noticed in accordance with the Ralph M. Brown Act and was available for public
viewing and review at least 72 hours prior to the scheduled meeting date. Copies of the 2019
Master Plans are available for review in the office of the city clerk.
Exhibits
1. City Council Resolution.
2. CMWD Board Resolution.
3. 2019 Utilities Master Plan Executive Summary.
4. Copies of the Master Plans are on file in the office of the city clerk.
September 17, 2019 Item #12 Page 5 of 21
RESOLUTION NO. 2019-183
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF CARLSBAD,
CALIFORNIA, APPROVING THE 2019 SEWER MASTER PLAN UPDATE, CAPITAL
IMPROVEMENT PROGRAM (CIP) PROJECT NO. 5543-1.
WHEREAS, the City Council of the City of Carlsbad, California has determined it necessary,
desirable and in the public interest to update the Sewer Master Plan; and
WHEREAS, the last update to the Sewer Master Plan was completed in 2012 based on 2010
data; and
WHEREAS, on Jan. 24, 2017, the City Council approved Resolution No. 2017-020 approving
execution of a professional services agreement with HDR Inc. for completion of the Sewer Master Plan
Update; and
WHEREAS, the 2019 Sewer Master Plan Update was completed by HDR Inc. in accordance with
the tasks outlined in their professional services agreement; and
WHEREAS, the 2019 Sewer Master Plan Update represents a comprehensive program for the
phased and orderly management of facilities to accommodate capacity and other improvement needs;
and
WHEREAS, the city planner has reviewed the project changes, and the revised Master Plans PEIR
addendum prepared by HDR, and found that none of the requirements in CEQA Guidelines Sections
15162 and 15163 for a subsequent or supplement EIR have been triggered; and
WHEREAS, the revised project is within the scope of the adopted PEIR and use of an addendum
to document the project changes is appropriate; and
WHEREAS, Guideline Section 15164 notes an addendum need not be circulated for public
review but may simply be attached to the PEIR; and
WHEREAS, staff recommends that the City Council approve the 2019 Sewer Master Plan
Update.
NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Carlsbad, California, as
follows:
1. That the above recitations are true and correct.
2. That the City Council of the City of Carlsbad hereby approves the 2019 Sewer Master
Plan Update, a copy of which is on file in the office of the city clerk.
September 17, 2019 Item #12 Page 6 of 21
PASSED, APPROVED AND ADOPTED at a Joint Special Meeting of the City Council of the City of
Carlsbad, California and the Board of Directors of the Carlsbad Municipal Water District of the City of
Carlsbad, California on the 17th day of September 2019, by the following vote, to wit:
AYES: Hall, Blackburn, Bhat-Patel, Schumacher, Hamilton.
NAYS: None.
ABSENT: None.
MMif
r ~lkc-1111 &Pmez//Dtpu+j
i~( BARBARA ENGLESON, City Clerk Ci 'tJ
CJerJt
(SEAL)
September 17, 2019 Item #12 Page 7 of 21
RESOLUTION NO. 1620
A RESOLUTION OF THE BOARD OF DIRECTORS OF THE CARLSBAD
MUNICIPAL WATER DISTRICT OF THE CITY OF CARLSBAD, CALIFORNIA,
APPROVING THE 2019 POTABLE WATER AND RECYCLED WATER MASTER
PLAN UPDATES, CAPITAL IMPROVEMENT PROGRAM (CIP) PROJECT NOS.
5543-2 AND 5543-3.
WHEREAS, the Board of Directors of the Carlsbad Municipal Water District (CMWD Board) of
the City of Carlsbad, California has determined it necessary and in the public interest to update the
Potable Water and Recycled Water Master Plans; and
WHEREAS, the last update to the Potable Water and Recycled Water Master Plans was
completed in 2012 based on 2010 data; and
WHEREAS, on Jan. 24, 2017, the CMWD Board adopted Resolution No. 1558 and entered into
an agreement with HOR Inc. to update the Potable Water and Recycled Water Master Plans; and
WHEREAS, the 2019 Potable Water Master Plan Update and 2019 Recycled Water Master Plan
Update were completed by HOR Inc. in accordance with the tasks outlined in their Professional Services
Agreement; and
WHEREAS, the 2019 Potable Water Master Plan Update and 2019 Recycled Water Master Plan
Update represent comprehensive programs for the phased and orderly management of facilities to
accommodate capacity and other improvement needs; and
WHEREAS, the city planner has reviewed the project changes, and the revised Master Plans'
PEIR addendum prepared by HOR, and found that none of the requirements in CEQA Guidelines
Sections 15162 and 15163 for a subsequent or supplement EIR have been triggered; and
WHEREAS, the revised project is within the scope of the adopted PEIR and use of an addendum
to document the project changes is appropriate; and
WHEREAS, Guideline Section 15164 notes an addendum need not be circulated for public
review but may simply be attached to the PEIR; and
WHEREAS, staff recommends that the CMWD Board approve the 2019 Potable Water Master
Plan Update and the 2019 Recycled Water Master Plan Update.
September 17, 2019 Item #12 Page 8 of 21
NOW, THEREFORE, BE IT RESOLVED by the Board of Directors of the Carlsbad Municipal Water
District of the City of Carlsbad, California, as follows:
1. That the above recitations are true and correct.
2. That the CMWD Board approves the 2019 Potable Water Master Plan Update and the
2019 Recycled Water Master Plan Update, copies of which are on file in the office of the city clerk.
PASSED, APPROVED AND ADOPTED at a Joint Special Meeting of the Board of Directors of the
Carlsbad Municipal Water District of the City of Carlsbad, California and the City of Carlsbad,
California on the 17th day of September 2019, by the following vote, to wit:
AYES: Hall, Blackburn, Bhat-Patel, Schumacher, Hamilton.
NAYS: None.
ABSENT: None.
r ~!-leclt,r GtJmez
70( BARBARA ENGLESON, SECRETARY Dep~!j 1
(SEAL) C17j
Cler✓
September 17, 2019 Item #12 Page 9 of 21
UTILITIE-S IN ACTION .
· Providing Integrated Planning
for a Sustainable Future
2 019 Utilities Master Plan Executive Summary ( City of
Carlsbad September 17, 2019 Item #12 Page 10 of 21
TABLE OF CONTENTS
. SE~T1QN1i
WHO WE ARE
SECTION Ill
FORCASTING FUTURE
SECTION IV
WORKING TO PREPARING NOW
FOR A SUSTAINABLE
FUTURE
WATER DEMAND AND DEVELOP SMART
SEWER FLOWS INFRASTRUCTURE
SECTION I
PREPARING NOW FOR A
SUSTAINABLE FUTURE
Reliable, sustainable utility services are vital to
the community in which we live and to the
environment we aim to protect. Our utility
infrastructure connects our community, ~,t.
drives our economy, and keeps us ~'ti __ _
healthy and safe. With low failure b
rates, the City of Carlsbad is -:JP
successfully and effectively ~
managing its water and sewer (J
infrastructure. The City did not /P
experience any structural
condition-caused sewer
system overflows in 2018, and
the system-wide break rate for
the City's potable and recycled
water pipelines is six times
better than the regional
average.
The Master Plan process identifies
the infrastructure improvements
necessary to continue to deliver
these vital services. The City's past
master plans were developed between
2009 and 2011, prior to the economic
General
Plan
Update
recession and extended drought conditions that
have changed our water consumption behaviors.
Integrated Uti I ity
Master Planning
Hydraulic
Modeling
to validate
capacity
needs
Asset
Sewer
Phased and
prioritized CIP
September 17, 2019 Item #12 Page 11 of 21
Key Objectives
The key objectives addressed in the 2019 Integrated Facilities Master Plan update include:
~T,
1 0 IA\
\ LJ I 1.nI I
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....0...
B-
B-B-
Incorporating updated land uses and population forecasts,
using the Carlsbad 2015 General Plan, the Carlsbad
Growth Management Plan and Growth Management Plan
Monitoring Reports, and the San Diego Association of
Governments Series 13 projections through 2050.
Documenting recent trends in water use and sewer
generation rates.
Incorporating new water supply reliability projects including
a new and closer connection to the Claude "Bud" Lewis
Carlsbad Desa lination Plant and expanded recycled water
service .
Developing capital improvement recommendations to
maintain Carlsbad 's high level of service to its customers.
Recommending a performance-based asset management
approach to extend the useful life of utility assets as well as
make sound repair and replacement investments.
September 17, 2019 Item #12 Page 12 of 21
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,I
WHO WEARE
City Boundaries
!..-_-J Sewer Service Area ·
c::::J Water & Recycled
Water Service Area
Carlsbad is a predominantly residential community located 30 miles north of downtown San
Diego with an estimated population of 115,000 in 2019. Water and recycled water services to
82% of the City are provided by Carlsbad Municipal Water District, a subsidiary district of the
City of Carlsbad. Sewer service to 74% of the City is provided by the City of Carlsbad.
The City of Carlsbad owns a combined
value of $2.1 billion in water, sewer and
recycled water infrastructure.
September 17, 2019 Item #12 Page 13 of 21
Water and Recycled Water Infrastructure
r:;;::;J squ~re miles EJ service area e ofcity
boundary
• active potable
service connections
miles of water mains
water storage tanks
47.5 Million Gallons (MG)
~ pressure zones
Sewer Infrastructure
r:;;:;"J squ~re miles EJ service area a of city
boundary
• active recycled
service connections
miles of recycled water mains
reclamation plant
expanded to 7 MG per Day (MGD) in 2016
& pressure zones
lift stations
miles of sewer
September 17, 2019 Item #12 Page 14 of 21
FORECASTING FUTURE WATER
DEMAND AND SEWER FLOWS
The median water demand forecast of 20,700 acre feet per year (AFY) or 18.5 million gallons per
day (MGD) at buildout in 2035 was determined to be the basis for the Master Plan and capacity
analysis of the water distribution system and supply system. This projection is lower than the
forecast in the 2012 Water Master Plan, but in line with the projections in the 2015 Carlsbad
Urban Water Management Plan.
Although the water and sewer service areas do not exactly align, approximately 45 percent of
the City's water use returns to the sewer system. The City has the capacity to divert and recycle
up to seven MGD of treated sewage from the Encina Wastewater Treatment Plant for use in the
City's recycled water system.
Water, Recycled Water & Sewer Forecasts
25 -,-----,-------,---~---r------.---~--~--~~-~
-+------+------+------+--------+---+
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_ __5_ewer:..En.ws. ,-1 i 1 1'-'-.-.-•-•-••••• I ~ I j 1 j -•••~••••••••••••-,. 5 -+---1='~-=-,,___--+-----+---+-----+----~=-ah ..... L!e..!::.=.+'-'-----!----------' ,__,,.,., --I -_l -• • • • -
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i
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1990 1995 2000 2005 2010 2015 2020 2025 2030 2035
YEAR
-Historical ,;, ■ ■ ■ ■ Projected
September 17, 2019 Item #12 Page 15 of 21
WORKING TO DEVELOP
SMART INFRASTRUCTURE
As water conservation efforts have been successful, and buildout of the City comes to
completion, the capacity of the water and sewer systems is largely capable of accommodating
projected growth. In the Sewer, Water and Recycled Water Master Plans, only a ~andful of
capital improvement projects were identified for near term improvements. Those
recommended improvements are shown in the maps below.
However, part of the City's infrastructure is now exceeding 50 years old. As the system
continues to age and deteriorate, the City seeks to sustain high levels of service at acceptable
levels of risk, while minimizing cost. To do this, the City will need to increase investments in
condition-related capital improvements and continue to implement asset management
strategies to proactively maintain high levels of service to its customers.
Because of this, an Asset Management Master Plan was developed for the first time. Asset
Management driven projects to address aging infrastructure are in the prioritization and
assessment phase and are not showri on the maps. We will continue to use smart modelling
and data analysis tools to make good utility investment decisions.
Capital Improvement Projects (CIP)
Potable Water CIP
City Boundaries
CIP
EEH3 Existing System
Tank
~ Reservoir
September 17, 2019 Item #12 Page 16 of 21
Recycled Water CIP
Sewer System CIP
City Boundaries
CIP
■■■■ Under Design/
Construction
EHE Existing System
• Tank
City Boundaries
-CIP
EHE Existing System
September 17, 2019 Item #12 Page 17 of 21
Industry and City staff experience informs us that age alone is not a good predictor of condition
or system investment need. Continued investment in the asset management program is
expected to result in lower infrastructure renewal costs than would be required through
age-based forecasts.
Significant potential savings have been identified through the City's asset management
programs including the following:
• The cost to replace sewer pipes with moderate sags is approximately $4 million in capital
investment. Eventually these pipes will neE?d to be replaced, but using a more frequent
cleaning maintenance strategy to manage minor issues is extending the useful life of sewer
pipes. This results in lower costs to ratepayers and fewer construction impacts to the
community.
• Over the next five years, a condition and performance-based asset management approach
saves the City approximately $2.6 million per year when compared to the age-based forecast
for gravity sewer and manhole renewal.
• Over the next 50 years, a condition and performance-based asset management approach
saves the City approximately $665 million dollars in unnecessary potable water and recycled
water pipeline, valve and service replacement (an average of $13.3 million per year). The water
renewal cost forecast is based on break rate and deterioration curves from regional utilities
with similar water main infrastructure.
September 17, 2019 Item #12 Page 18 of 21
Gravity Sewer Renewal Cost Forecast
6.0
5.0
I
Ag~-based
~ 4.0
V'I
C:
0
~ 3.0
+.J V'I
0 u 2.0
1.0
\
\ co
. ~2.6+ saving~ per yea,1 from
1d1t1on-ljased vs. age-based appro, ch I ; I !
\
' ~1 Conditic'>n-basea
0 I : i I I I I I
2020 2022 2024 2026 2028 2030
YEAR
As condition assessments are done each year and the data is analyzed, the condition-based
forecast will be extended beyond 2024.
Water & Recycled Water Renewal Cost Forecast
$25 ~---~~---~----~---~---~
-+----~----... ----+-----.---......i••······ Age-based
c 0 ·.;:::;
IO c.:: C:
$20-+-------1-----+-----+-------+--------,
l Cumulat ive
Performance-based
·; $15 -+-----t-=------~~~'+-------+----------1
c: ...... Condition Assessment
'o :::, ···· ··· Cathodic Protection
] ·· ... ·· .. Valves
Q.J
c: Limited Access
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~
+.J V'I 0 u
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2020 2030 2040 2050 2060 2070
YEAR
September 17, 2019 Item #12 Page 19 of 21
The City of Carlsbad's Capital Improvement Program is the foundation of our long-range capital
investment for reliable and sustainable infrastructure. It is the planning tool that allows us to
schedule and budget funding for projects over time. In any given year, projects could be
"added" to the CIP, but may not be scheduled to be funded for several years. Projects get added
to the CIP based on criteria that include condition assessments, public health and safety
regulations, supporting the community's vision and City Council goals.
The CIP project recommendations developed as part of the Master Plan process provide
planning information that identifies where system vulnerabilities exist. Through the Master Plan
process, we have determined that the proposed CIP projects would not result in any
environmental impacts that have not already been addressed in the prior Program
Environmental Impact Report, and no new mitigation measures are required.
We are committed to continuing to operate and maintain high performing water, recycled water
and sewer systems, and ensuring that critical facilities are properly financed to support the
health and safety of our community.
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