Zone 2 Water Pressure Improvements_Sky Blue, Alpine Estates, Eagle Ridge Subdivisions Copyrighted
June 19, 2017
City of Dubuque Action Items # 4.
ITEM TITLE: Zone 2 Water Pressure Improvements
SUMMARY: City Manager recommending authorization to begin the
process to build a water tower off Roosevelt Road in Water
Pressure Zone #2, which encompasses the area in and
around Roosevelt Road and Peru Road, including the Sky
Blue Estates subdivision, the existing Alpine Park
development and Eagle Valley subdivision.
SUGGESTED DISPOSITION: Suggested Disposition: Receive and File; Approve
ATTACHMENTS:
Description Type
Zone 2 Water Pressure Improements-MVM Memo City Manager Memo
Staff Memo Staff Memo
Pressure Zones and Mains Supporting Documentation
IW Memo Supporting Documentation
THE CITY OF Dubuque
fta B E I 11p y
Masterpiece 012 the Mississippi 2007.2012«2013
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: Water Distribution System Pressure Zone 2 Improvements
DATE: June 15, 2017
The City of Dubuque has a compelling project for a potential federal infrastructure
funding program that City staff would like to make shovel ready to create a competitive
application for funding. Water Department Manager Denise Ihrig is recommending
authorization to begin the process to build a water tower off Roosevelt Road in Water
Pressure Zone #2, which encompasses the area in and around Roosevelt Road and
Peru Road, including the Sky Blue Estates subdivision, the existing Alpine Park
development and Eagle Valley subdivision. This is an area that experiences low water
pressure.
The City has studied this pressure zone and developed two options to increase the
water pressure. One would be this water tower solution and the other was installing a
pump station now and delaying the water tower. Previously I had recommended the
pump station and that is currently in the City budget. However, with further study, the
$4,125,500 water tower is a better option, and even if the City does not receive a
federal infrastructure grant, would be affordable without a water rate increase because
of some planned Water Department operational efficiencies and the use of Iowa
Finance Authority State Revolving Loan Fund low interest borrowing.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
VW4
Mic ael C. Van Milligen
MCVM:jh
Attachment
cc: Crenna Brumwell, City Attorney
Teri Goodmann, Assistant City Manager
Denise Ihrig, Water Department Manager
Jennifer Larson, Budget Director
Alexis Steger, Senior Budget Analyst
2
THE CITY OF Dubuque
D
UB3 &kE 111-America Ci i
1111.
Masterpiece on the Mississippi 2007-2012-2013
TO: Michael C. Van Milligen, City Manager
FROM: Denise Ihrig, Water Department Manager
SUBJECT: Water Distribution System Pressure Zone 2 Improvements
DATE: June 13, 2017
PURPOSE
The purpose of this memorandum is to provide information and supporting data to authorize an
engineered solution to resolve low pressures experienced in the City of Dubuque's second
pressure zone for the City's water distribution system. The second pressure zone or Zone 2
encompasses the area in and around Roosevelt Street and Peru Road including the Sky Blue
Estates subdivision currently under development and the existing Alpine Park development and
Eagle Valley Subdivision. Attached is a map of the water pressure zones and an engineering
preliminary cost estimate.
BACKGROUND
The City of Dubuque is responsible for providing a safe and reliable water supply meeting the
requirements established by state and federal government agencies. The City of Dubuque
treats and distributes an average of 7.2 million gallons per day to over 23,500 customers
through more than 320 miles of water main piping.
Standards
The U.S. Environmental Protection Agency establishes the treatment or water quality
parameters, which in the State of Iowa are administered through the Iowa Department of
Natural Resources and managed through the City's water supply operating permit. The design,
permitting and operation, including pressure and flow characteristics of the distribution system,
are also administered by the Iowa Department of Natural Resources based upon the
Recommended Standards for Water Works, commonly known as the Ten States Standards.
According to the Ten State Standards, "Water distribution systems shall be designed to maintain
treated water quality. Special consideration should be given to distribution main sizing, providing
for design of multidirectional flow, adequate valving for distribution system control, and
provisions for adequate flushing. Systems should be designed to maximize turnover and to
minimize residence times while delivering acceptable pressures and flows."
The City of Dubuque's water distribution system covers several square miles of varying
elevations. In areas without pumping stations, elevated towers, or distribution system valving,
the resulting water pressures can range from below 35 pounds per square inch (psi) to over 100
psi. Therefore, it is necessary to either boost the water to increase the pressure or to reduce the
pressure to prevent damage to pipelines.
In accordance with the Ten State Standards, "The system shall be designed to maintain a
minimum pressure of 20 psi (140 kPa) at ground level at all points in the distribution system
under all conditions of flow. The normal working pressure in the distribution system shall be at
least 35 psi (240 kPa) and should be approximately 60 to 80 psi (410 - 550 kPa) and not less
than 35 psi." Lower pressures may be experienced in some areas due to the challenges
associated with the natural topography, pressure losses associated with water main lengths, or
economic feasibility.
Water Pressure Zones
The water pressure areas or zones identified as either being boosted or reduced typically follow
the natural topography within the City. There are currently six water pressure zones, they are
known as Zones 1 through 6, see the attached map showing each of the six zones. A seventh
and eighth pressure zone will result from the connection of the City's water supply to Barrington
Lakes and former Vernon water systems. Please refer to the attached water pressure zones
location map. The City continues to look at methods to evaluate the pressures and flows within
the distribution system identifying areas where water pressures and flows need to be improved.
Zone 2 Issues
During an evaluation of the City's distribution system in 1992 by Clapsaddle-Garber Associates
of Ames, Iowa, several issues were identified in Zone 2 as needing attention including low
pressure and flows.
In addition to working with Clapsaddle —Garber Associates, the City has also been assisted by
Strand Associates, Inc. of Madison, Wisconsin and IIW, P.C. of Dubuque, Iowa and has
progressed toward finding efficient and economic solutions to manage the low-pressure issues
experienced in Zone 2, along with a need to provide improved flows during fire flow conditions.
Over a twenty-year period, the area has experienced residential development growth, and
during this time, IIW has performed several distribution system analyses to assist the City with
direction on how to better serve new development and existing property owners.
DISCUSSION
Zone 2 pressures are provided by the Eagle Point Park elevated water tower. It has a volume of
500,000 gallons with an overflow elevation of 935 feet above mean sea level. Water is pumped
into the second pressure zone from two locations, the water treatment plant and the Stafford
Street booster station.
Zone 2 Reports
An engineering report prepared by IIW in 2002 titled 'Intermediate Pressure Zone: Replacement
Water Tower Site Evaluation' evaluates the second pressure zone and specifically identifies
where and how the pressures can be improved. The report identifies the elevation of the
overflow at the Eagle Point Park tower as limiting the available water pressure in the zone; most
notably the pressure at the highest point along Roosevelt Road is recorded between 20 and
25psi. This is problematic when looking to achieve system pressures of 60 to 80 psi with a
minimum working pressure of 35psi to serve current, new, and future developments.
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Following the siting evaluation, the City was presented with an opportunity to purchase land
along Roosevelt. In 2010, the City purchased an approximate 1.3 acre parcel located at 3301
Roosevelt Street for the proposed construction of a water tower.
A 2008 report also by IIW, evaluates all of the pressure zones including Zone 2 and looks at the
water storage and pressure availability City-wide. Again, the 2008 report identifies the pressure
issues in Zone 2. More importantly, the 2008 study demonstrates the pressure relationship and
connection between the zones and that each zone does not function independently.
Zone 2 and 3 Analysis
Reviewing the analysis of Zone 2, the relationship with pressure Zone 3, which encompasses
the majority of the area on the bluff to the west and to the south, is highlighted and should be
taken into consideration when developing the strategy and solutions for Zone 2 pressures and
flows.
The most recent analyses completed by IIW, includes reports dated 2013 and 2014 which
demonstrate two options that can assist with improving water pressures in Zone 2. The 2013
report provides for an elevated water storage tower and the 2014 reports targets a stand-alone
booster pump station, with an elevated water storage tower to be installed at a later date.
The 2013 IIW report titled Roosevelt Street Water Tower, Implementation Planning Report,
provides a systematic review of the City of Dubuque's pressures zones. The report also
references the previous studies including the 2002 water tower site evaluation and the 2008
study.
The 2013 report goes further and describes not only present solutions to address low pressure
and fire suppression in Zone 2, but also provides a preliminary examination of Zone 3 currently
served by the College Street elevated tower, Asbury standpipe and Pennsylvania Standpipe. In
all three reports, the solution presented to addressing low pressure, fire suppression,
preparation for growth, and enhancing Zone 3, is the installation of an elevated water tower.
Zone 2 and Zone 3 Benefits
The distribution system analysis in each of the reports, focuses on site selection, tower sizing,
overflow elevation, and fire suppression needs. The Roosevelt Street location in Zone 2 was
selected due its proximity to two 12-inch diameter mains, land and site access availability, the
overall site elevation, and its proximity to drainage facilities in the event of an overflow and
drainage associated with tank maintenance. Sizing of the tower has varied between 750,000
gallons and 1.25 million gallons.
Using a sizing estimation of 1.25 million gallons (the final capacity and overflow and operational
range elevations vary and are subject to final engineering and distribution network analysis or
modelling) would replace the functionally obsolete 0.5 million-gallon Eagle Point Park Elevated
Tower and the Stafford Street booster pump station and provide maximum fire flows and normal
usage during a major fire and accommodation of service area expansion.
In addition, Zone 2 could be connected to Olympic Heights subdivision (Zone 5) and the
Olympic Heights booster pump station could be taken out of service reducing energy, operation
and maintenance costs and a pressure zone. The Olympic Heights pump station is required to
run 24 hours per day to provide daily usage.
3
If Zones 2 and 3 were to be combined, water fed from the north with a 1.25 million gallon tank
would improve flow rates and reliability into Zone 3. The overflow elevation of a proposed
Roosevelt Tower is discussed as matching the overflow elevations of Zone 3 storage facilities,
including College Street tower. Should a connection between Zone 2 and Zone 3 be
established, the overflow elevations would require analysis of not only Zones 2 and 3, but also
Zone 1 located east of the bluff and served by the West 3'' Street in ground reservoir and Park
Hill Standpipe.
As Zone 1 and Zone 2 could both provide water supply and pressure to Zone 3, an analysis of
how these zones can work together will enable to the City to make effective and economical
water storage improvements in the future. Such storage improvements would include water
storage tank coating maintenance and eliminating water storage deficiencies present in Zone 3.
The DNR regulations require water storage must be equal to the average daily use and/or the
recommended fire protection volume. While excess storage is discouraged due to water quality
issues that may arise, insufficient storage is equally as important.
In 2013, the City was prepared to move forward with the installation of an elevated water tower
on Roosevelt Street located on the site purchased in 2010, however following further
consideration of the budget and user rates, the tower project was delayed. The City approached
IIW to assist in the development of an interim solution. The January 2014 IIW report titled
Intermediate Water Service Zone, Interim Pressure Modifications Options was prepared. The
interim solution of a booster pump station, would provide increased pressure to the existing
development and areas currently in the development phase adjacent to the booster pump
station site. The booster pump station would not provide for increased pressures elsewhere in
Zone 2 and would not improve the storage deficiencies identified in Zone 3.
During a 2017 water department review of the booster pump station and acknowledgment of the
limited benefits of the project to the pressure zone and the surrounding areas, the current
recommendation is to place the booster pump station project on hold to pursue the Roosevelt
Street Elevated Water Tower project in two phases. Phase 1 will address the increase in
pressures throughout Zone 2, and Phase 2 which will connect Zone 2 to Zone 3, thereby
eliminating the storage deficiencies in Zone 3 and removing the need to operate and maintain a
pumping station in the Olympic Heights subdivision known as pressure Zone 5.
Future Savings
In addition, to the widespread pressure and fire suppression benefits of installing an elevated
tower on Roosevelt Street in Zone 2, with eventual connection to Zone 3, there are multiple cost
savings. In 2010 and 2015, KLM Engineering Incorporated of Minnesota, conducted an
inspection of all City owned water storage facilities. The reports indicate needed maintenance
and improvements to several of the City of Dubuque's water storage tanks and reservoirs.
In Zone 2, the 500,000 gallon Eagle Point Park water tower was identified as needing new
internal and external tank coatings along with several structural repairs estimated at
$692,000.00. In Zone 3, the 750,000 gallon College Street water tower was identified as
requiring structural repairs and interior and external protective coatings estimated at
$929,000.00. These projects have not yet been budgeted.
The Eagle Point Park water tower project will no longer be required with installation of a new
Roosevelt Street tower. The improvements to College Street tower will be placed on hold until
4
further analysis of the storage and distribution system have been conducted under the PER
process to determine if alternative storage is available and the tank can possibly be taken out of
service.
As part of the Phase 1 project, Stafford Street pump station will no longer be needed saving
approximately $2,200 per year in operational expenses. Olympic Heights pumping station will
no longer be required following installation of the water tower and connection of Zone 2 to Zone
3, saving approximately $7,800 per year in operational expenses.
The estimated short term savings associated with completing Phase 1, include no longer
performing maintenance and repairs to the Eagle Point Water tower and the Stafford Street
pump station and are estimated to be $695,000.00.
BUDGET
The State Revolving Loan program along with Water Department cost savings are available to
fund the Roosevelt Street tower project. Working with IIW, P.C., the 2013 cost estimates have
been adjusted for inflation for a 2018 or 2019 bid letting schedule. Please see the attached
revised cost estimates from IIW, dated June 1, 2017.
The estimated total project cost including, engineering, construction, inspection, and
contingency is $5,556,500.00. The project is being presented in two phases, where phase one
would address the pressure and flows in Zone 2 with an elevated water tower; and phase two
includes the connection to Zone 3 and the elimination of Zone 5 (Olympic Heights).
The Phase 1 cost estimate totals $4,125,500.00, for a 1.25 million gallon (MG) elevated tower
including water distribution improvements. The preliminary engineering report will require a
hydraulic distribution network model be built to identify the final tank size. The IIW revised cost
estimate also identifies that some or part of the project may not be SRF eligible and other
funding sources such as local construction funds will be necessary to cover a possible
$1,000,000 for those project costs, funding sources are described below. The Phase 2 project
to connect Zone 2 to Zone 3 and eliminating Zone 5 including engineering design is estimated
to be $1,431,000.00, and will be programmed at a later date.
Design and Engineering
While there have been several engineering studies completed identifying areas of low pressure,
the necessary steps to develop a final design for an elevated tower in Zone 2 have not. Using
the State of Iowa Revolving Fund (SRF) program, the project would qualify for a Planning and
Design Loan. Per the SRF program, Planning & Design Loans cover costs incurred in the
planning and design phase of a water infrastructure project. These loans have 0 percent interest
for up to three years and require no initiation or servicing fees. In addition, there is no minimum
or maximum loan amount and no principle payments are due for three years or until the
construction project commences, whichever comes first. Eligible costs include engineering fees,
archaeological surveys, environmental or geological studies, and costs related to project plan
preparation. The loans may be rolled into a State Revolving Fund (SRF) construction loan or
can be repaid when permanent financing is committed.
The use of State of Iowa Revolving Loan funds would require development of a Preliminary
Engineering Report (PER), completion of an Intended Use Plan (IUP), an archeological
research report, and an environmental study. The cost estimate to prepare the documents is
5
$150,000.00. The final design, plan and specification preparation is estimated to be $325,000
for Phase1. The total estimate for preliminary and final design engineering for Phase 1 is
$475,000.00
Construction
Phase 1 of construction would include the installation of a composite style water tower, the
estimated size prior to a hydraulic analysis is 1.25 million gallons, and is estimated to be
$2,935,000.00. The associated water main improvements, pressure reducing stations, pump
replacements, abandonment of Stafford Street pump station and the demolition of Eagle Point
Park water tower, to support the project are estimated at $653,500.00. Construction inspection
will also be required and is estimated at $62,000.00. The estimated total construction cost for
Phase 1 is $3,650,500.00.
Following the submittal of a Preliminary Engineering Report and Intended Use Plan to the State
of Iowa Revolving Fund program, the project will be reviewed to determine construction costs
that are eligible for SRF monies and construction costs that are ineligible. The recommendation
from IIW, P.C. is that based on a preliminary review of costs, a Phase 1 estimate of $3,650,500
approximately $1,000,000.00 of the total construction costs could be required to come from
other funding sources other than the SRF program, such as local funds. The final sizing and
storage capacity of the tower may differ from the requirements of SRF program, and may be
larger based on the future needs and growth of the community serviced by the proposed tower.
These increased costs may not be eligible for reimbursement and are not included in this
budget proposal as it is unclear as to if the final tower size will change.
Funding
The cost of the Roosevelt Street Water Tower project includes $475,000 in engineering and
design and $3,650,500 in construction plus construction observation.
The following projects have bond proceeds from previously issued debt that will be used to fund
a portion of the Roosevelt Street Water Tower project:
Project Amount
Main Extension Annexation $421,700
Roosevelt Road Main Extension $546,600
Generator Savings $100,000
Total $1,068,300
The remainder of the Roosevelt Water Tower project will be funded through an Iowa Finance
Authority State Revolving Fund loan. A planning and design loan in the amount of $475,000 will
be requested in July 2017, which has a 0% interest loan that will roll into the construction loan.
An Iowa Finance Authority State Revolving Fund construction loan in the amount of$2,582,200
will be requested in August 2018, which has a 2% interest rate. The total amount of debt being
issued is $3,057,200 which will not count against the City's statutory debt limit because it is
revenue debt.
It is possible to issue $3,057,200 in debt without increasing Water rates for several reasons.
First, the Water Plant Manager position is currently frozen in Fiscal Year 2017 and 2018 and will
6
be eliminated, which is a savings of$109,459. There is also a vacant Plant Operator position
that will be eliminated for a savings of $75,437. Electricity savings of$2,200 will be realized
annually from the Stafford Pump Station. In addition, there are two existing State Revolving
Fund loans that will be refinanced from a 3.25% interest rate to a 2.00% interest rate, which will
save the Water fund approximately $216,000 over the remainder of the loans. The savings by
year is as follows:
Clear Well Meters Total
2018 $(4,282.50) $- $(4,282.50)
2019 $(6,447.08) $- $(6,447.08)
2020 $(5,987.17) $- $(5,987.17)
2021 $(5,482.43) $(25,701.10) $(31,183.53)
2022 $(4,965.75) $(23,983.11) $(28,948.86)
2023 $(4,405.02) $(22,201.19) $(26,606.21)
2024 $(3,800.70) $(20,291.67) $(24,092.37)
2025 $(3,185.70) $(18,288.39) $(21,474.09)
2026 $(2,527.95) $(16,192.76) $(18,720.71)
2027 $(1,827.91) $(13,973.66) $(15,801.57)
2028 $(1,086.03) $(11,632.55) $(12,718.58)
2029 $(9,170.89) $(9,170.89)
2030 $(6,590.16) $(6,590.16)
2031 $(3,859.50) $(3,859.50)
Total $(43,998.24) $(171,884.98) $(215,883.22)
In summary, the Roosevelt Water Tower Project is funded as follows:
Main Extension Annexation CIP $421,700
Roosevelt Road Main Extension CIP $546,600
Generator CIP $100,000
IFAState Revolving Fund Loan $3,057,200
Total Funding $4,125,500
7
TENTATIVE SCHEDULE
Planning and Design Loan Request to the State of
Iowa Revolving Loan Fund program July 1, 2017
Phase 1 Preliminary Engineering and Intended Use Plan Submittal March 1, 2018
Phase 1 Final Engineering Design, Bid and Award August 2018
Phase 1 Loan Application Submittal and Award August 2018
Phase 1 Construction Start September 2018
Phase 1 Construction Completion June 2020
REQUESTED ACTION
I respectfully request consideration of improvements to the water pressure and fire flow
suppression in pressure Zone 2 located in the northern section of the City of Dubuque in and
around Roosevelt Street and Peru Road with the installation of an elevated water tower. The
improvements shall be funded through the State of Iowa Revolving Fund (SRF) program and
the use of local water construction funds; and the project shall be phased as described above. I
request permission to apply for a State of Iowa Planning and Design Loan through SRF in an
amount not to exceed $475,000.00 to fund the development of the preliminary engineering
report, the intended use plan and final design and engineering associated with Phase 1.
Actions required to initiate Phase 2 shall be determined at a later date.
8
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Pressure zones DISCLAIMER:This information was compiled
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Dubuque and Dubuque County.It is understood that,while Q
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www.iiwengr.com
4155 Pennsylvania Avenue 1151 Badger Road 101 Seventh Ave.South, Ste 200 127 A West 76th St.
Dubuque, IA 52002-2628 Hazel Green,WI 53811 St.Cloud, MN 56301 Davenport, IA 52806
(563)556-2464 1(800)556-4491 (Voice) (608)748-4308(Voice) (320)230-0840 1(800)556-4491 (Voice) (563)823-0192(Voice)
(563)556-7811 (Fax) (563)556-7811 (Fax) (320)529-8989(Fax) (563)823-0195(Fax)
MEMORANDUM.
To: Denise Ihrig, P.E.
From: Marc Ruden, P.E.
Date: 06/01/2017
Subject: Roosevelt Street Water Tower 2018 Project—City of Dubuque, Iowa
IIW Project No.: 17127
The purpose of this memo is to provide updated construction estimates, to demonstrate the need for the Roosevelt Street
Water Tower and required supporting infrastructure improvements project and to provide discussion on SRF funding
resources to be utilized for the project. Estimates are provided assuming FY 2018 Design and FY 2019 Construction.
Discussion of Need for Storage
The need for a larger and higher water tower in the intermediate or 2nd service zone was identified several years ago in a 1992
Water Distribution System Analysis and has been brought back to the table in subsequent analyses throughout the years.
The larger higher water tower in the intermediate 2nd service zone would allow the City to address a storage deficiency in the
high or 3rd service zone.A connecting water main would be required. The connection would also provide for better pumping
reliability in both the intermediate 2nd service and high 3rd service zones.
The higher water storage is needed to provide adequate pressures at higher elevations in the intermediate service zone to
allow for development and provide proper fire protection. The larger storage volume is needed for both the existing storage
deficiency and continuing growth in the area. Recent property development at higher elevations in the district has made the
need for the water tower more urgent.
A larger and higher water tower will help the City prepare for service extensions to areas that have been considered for
annexation. The proposed water tower will allow the City to provide water to users outside the City if so desired.
Furthermore, the recommended improvements would allow the City to decommission the costly and unsafe Olympic Heights
and Stafford Street Booster Stations.
Discussion of Changing Conditions and Operational Parameters and Effect on Storage Needs
Studies for water storage needs are typically accurate for the snapshot in time that they are produced. They incorporate
various assumptions based on known and projected information available at the time they are conducted. Three evaluations or
studies have been conducted in the past by IIW that address water storage relative to water storage needs in the 2nd and 3,d
service zones. The studies were conducted in 2002, 2008 and 2013—in reviewing these studies and the associated
recommendations, community needs and operating parameters change over the years. Needs and operating parameters have
continued to change since the last study and it is very important to incorporate the current City needs and operating
parameters into the Preliminary Engineering Report that is required to be provided by the Iowa DNR for all SRF Funded
projects. This report will:
• Update and illustrate current storage deficiencies based on known operating parameters in place now—a key
example of this is the Eagle Point Water Tower that has been included in previous studies to provide an effective
storage to Zone 2 of 500,000 gallons. This storage facility in reality is only providing storage over a less than 5 foot
operational range just a fraction of the available storage. This is being done wisely by water department staff to
ensure that residents at higher elevations in the zone do not experience pressures that are below the minimum DNR
parameters. Items like this will help to justify the project for SRF financing as they will fund existing deficiencies but
not future projections.
• Inform the City as to further justification of the need for the water storage as it relates to current and future conditions
as they are now projected.
• Provide guidance for comprehensive planning of Water Supply and Storage needs.
• Provide water distribution modeling results that illustrate very clearly current system deficiencies and sheds light on
the best direction for the City to take regarding capital expenditures on the water system to remedy deficiencies.
Modeling is critical for future planning in the City's complex array of pressure zones and their inter-relationships with
each-other.
• Address aging infrastructure and help the City prioritize how to best serve the residents of Dubuque.
• Provide analysis and guidance as to where water storage should be strategically placed in the future and discuss the
merit of whether or not to continuing to maintain existing storage facilities that require costly maintenance such as the
College Street Water Tower(nearly$1,000,000 of maintenance required)and the Eagle Point Water Tower(nearly
$700,000 of maintenance required).
Phased Approach to Achieve Project Objectives
The City could take a phased approach to accomplishing their goals related to this project. Phase 1 would focus on getting the
Water Tower online and include the associated elements that would bring Zone 2 online with the Tower. Phase 2 would
include the Zone 3 and Olympic Heights connections. The project would be broken down into two phases as outlined below in
the estimate of costs for budgeting purposes:
Estimate of Costs for Budgeting Purposes—Phase 1
The recommended Phase 1 improvements include the following:
Preliminary Engineering Report w/Distribution
Modeling (SRF Funding Requirement):
Report $150,000.00
Composite Style Water Tower 1,250,000 Gallons:
Construction $2,650,000.00
Contingency $265,000.00
Engineering and Observation/Testing $255,000.00
Miscellaneous $45,000.00
$3,215,000.00
Delicia Water Main Connection:
Construction $135,000.00
Contingency $13,500.00
Engineering and Observation $27,000.00
Miscellaneous $7,000.00
$182,500.00
Water Plant Pumps#'s 6 and 7 Replace and Add VFD's:
Construction $51,000.00
Contingency $5,000.00
Engineering $5,000.00
Miscellaneous $2,000.00
$63,000.00
Pressure Reducing Valve Stations:
Construction $355,000.00
Contingency $35,500.00
Engineering and Observation $65,000.00
Miscellaneous $7,000.00
$452,500.00
Eagle Point Water Tower Demolition:
Demolition $46,000.00
Contingency $4,500.00
Engineering $10,000.00
Miscellaneous $2,000.00
$62,500.00
The above Phase 1 project recommendation estimates total $4,125,500. The City of Dubuque should budget for a-10%to
+10% variation from this estimate based on a number of variables equating to the range of$3,700,000 to$4,540,000
assuming a FY 2019 construction time frame.
Estimate of Costs for Budgeting Purposes—Phase 2
The recommended Phase 2 improvements include the following:
32nd/Saunders/Stoltz Water Main Connection:
Construction $625,000.00
Contingency $62,500.00
Engineering and Observation $95,000.00
Miscellaneous $12,500.00
$795,000.00
Olympic Heights Water Main Connection:
Construction $500,000.00
Contingency $50,000.00
Engineering and Observation $75,000.00
Miscellaneous $11,000.00
$636,000.00
The above Phase 2 project recommendation estimates total $1,431,000. The City of Dubuque should budget for a-10%to
+10% variation from this estimate based on a number of variables equating to the range of$1,290,000 to$1,580,000
assuming a FY 2019 construction time frame. If this project is moved into future years the estimates should be adjusted
accordingly.
Discussion of SRF Financing Regarding the Phase 1 Project
A discussion with Taroon Bidar, the Senior Environmental Engineer with the Water Supply Staff verified that the majority of the
improvements would be SRF Funding eligible. Taroon confirmed that the SRF Funding mechanism is able to be used for
storage and supporting infrastructure improvement projects that resolve existing system storage and infrastructure
deficiencies. Additionally, the program allows for the normal projection of growth of the existing population served to the 20
year design period to be included in the improvements. As the City does have current storage deficiencies in the 3rd Service
Zone this project would be mostly eligible.
The City would likely be required to bid 2 options when the project is let(Utilizing SRF Funding). One option would be the
100%SRF eligible project while the other would include the City's preference for sizing based on anticipated annexations or
industrial growth over and above the allowable 20 year projection eligible for funding. Further analysis would be conducted in
the preparation of the Preliminary Engineering Report to determine what the differences are likely to be.
For budget purposes, a conservative planning estimate might be to presume the SRF project would cover the construction of a
750,000 gallon water tower as opposed to the 1,250,000 gallon recommended size. If that is the case, and assuming a$2.10/
gallon cost for storage the City may be required to fund$1,000,000 to$1,200,000 out of other resources other than the SRF
Funding mechanism for the 500,000 gallon difference and possible required downsizing of supporting infrastructure.
In summary, of the$3,700,000 to$4,540,000 base project estimate,for planning purposes the City should assume that
$1,000,000 to$1,200,000 could be required from resources other than the SRF Program.