HomeMy WebLinkAboutDRAFT Water Impact Fee CIP
Project Name:
22MG Membrane Water Treatment Plant
Estimated Cost:
$40.2 Million Total
Water Plant – W07 FY08-FY12
Project Number: Date
Scheduled:
Purpose: New Replacement Facility Equipment
Project This new Membrane Filter Treatment Plant is the preferred water treatment
alternative identified in the adopted Water Facility Plan. It is recommended
Description:
to be built with an initial configuration providing 22MGD of water treatment
capacity, with future expansion capability to 36MGD. This addresses both
the 10- and 20- year capacity requirement forecast for the City’s water
treatment system.
The current 15MGD WTP equipment is nearing the end of its useful life;
the plant’s direct filtration treatment process, while effective most of the
year, becomes only marginally effective during spring runoff or flash
thunderstorms in the watershed, dropping plant efficiency as low as 70%;
and, rapid population growth and expansion of city water services is
increasing demand for water. The current plant capacity may be exceeded
in as few as five years.
The New Plant will be sited at the existing WTP site in an 18,800 sf
building located directly north of the existing plant. It will include gravity
thickeners, a drying bed building with dual vacuum-assisted beds, triplex
micro strainers and sludge pumps. All these new facilities will easily fit on
the approximately 33-acre parcel of City-owned property on the site.
A 12-month pilot testing phase will need to be completed prior to design
finalization. We are required to have the new plant online by October 2013.
Extensions of that deadline are possible, but we are not relying on the
assumption that they would be granted.
Alternatives
The Water Facility Plan considered numerous alternatives for water
treatment. This was identified as the preferred alternative in the adopted
Considered:
plan.
Advantages of Planning for increased water supply to meet growing demands and to
replace existing equipment that is at the end of its useful life.
Approving this
Project:
Estimated New This plant is estimated to require two new operators, in addition to existing
plant staff. Annual O&M costs = est. $1,735,901 (including existing staff
Recurring
plus new plant expenses).
Costs:
Funding FY08 Pilot Testing = $200,000 Total
67% Water Utility Fund = $133,000
Sources:
33% Water Impact Fees = $67,000
FY09 & FY10 Design = $3,000,000 Total
67% Water Utility Fund = $2,000,000
33% Water Impact Fees = $1,000,000
FY11 & 12 Construction = $37,000,000 Total
67% Water Utility Fund = $24,700,000
33% Water Impact Fees = $12,300,000
City of Bozeman Capital Improvements Plan FY11-15
Project Name:
Sourdough Creek (Mystic Lake) Dam
Estimated Cost:
$20 Million Total; $200,000 FY11 Begin Design
Water Impact Fees – FY08 – Prelim
Project Number: Date
WIF01Scheduled: Design Consult
FY11 – Begin
Design
Unscheduled -
Construction
Purpose: New Replacement Facility Equipment
Project
The City currently has storage rights to approximately 1,955 Million
Gallons per Year, with a reservation for an additional 931 MGY, worth of
Description:
storage rights on Sourdough Creek. These rights were historically
allocated based on available storage in Mystic Lake. The Mystic Lake
Dam, however, has been breached, rendering these storage rights
essentially useless until a new dam is constructed on Sourdough Creek to
replace the Mystic Lake Dam.
Because this volume of storage right is very significant, the City intends to
utilize these rights to meet future water needs.
This option is suggested in addition to continued water conservation efforts
throughout the City.
Alternatives The Facility Plan explores many options for additional future water in
Section 3.C.
Considered:
Advantages of Additional water is secured to meet future resident needs.
Approving this
Project:
Estimated New
Unknown at this time.
Recurring
Costs:
Funding 100% Water Impact Fees
Sources:
City of Bozeman Capital Improvements Plan FY11-15
Project Name:
5.3MG Concrete Water Storage Reservoir
Estimated Cost:
$5,300,000
Water Impact Fees – Unscheduled
Project Number: Date
WIF03Scheduled: (Online by 2017)
Purpose: New Replacement Facility Equipment
Project A new 5.3MB partially buried concrete water storage reservoir is to be
constructed by 2017. The proposed location of the reservoir is on City
Description:
property adjacent (to the North) of the proposed new Hyalite/Sourdough
water treatment plant.
By the year 2017, current available storage will be inadequate to meet the
City’s needs according to MDEQ minimum system storage requirements.
This reservoir is sized to meet the City’s storage needs up to 2025,
assuming a 5% annual growth rate.
Locating the storage reservoir at the recommended site will raise the
hydraulic grade line in the City’s water system, which will increase
pressure for the southern part of the City and will allow future development
to occur in the south on a gravity system.
Alternatives
The water facility plan reviewed numerous options. This is the preferred
alternative of the adopted plan.
Considered:
Advantages of Increased water storage to meet the needs of our growth community, and
the requirement of MDEQ. Increased system water pressure in the
Approving this
southern part of the City.
Project:
Estimated New
Requires minimal operation and maintenance. Checking of valves, level
sensors and vents on an annual basis and diver inspection and vacuuming
Future
every five years. Estimated at $4,000 annually.
Recurring
Costs:
Funding
100% Water Impact Fees
Sources:
City of Bozeman Capital Improvements Plan FY11-15
Project
New Transmission Main from Water Treatment Plant (System
Name:
Redundancy/Capacity Expansion)
Estimated
$21,682,548 Total
Cost:
ProjectWater Impact Fees– WIF05 Date Scheduled: Unscheduled
Number:
Purpose: New Replacement Facility Equipment
Project The Water Facility Plan identifies this project as the most critical redundancy issue in the City’s
water distribution system. The City receives the majority of its water from the Water Treatment
Description:
Plant through an existing 30 inch concrete transmission main. If this main is off-line for any
reason, the City will need to rely on storage from its three reservoirs. At 2005 water demand
levels, storage reserves would be depleted in three days during the average day demand, and in
24 hours during the maximum day demand.
Not only will a second transmission main provide the security of redundancy if the existing 30-
inch main is removed from service, but the existing 30-inch main is expected to reach capacity by
the year 2020.
Redundancy Area: Water Treatment Plant
New Size Description of Estimated Footage (ft)
Old Size Construction Cost
4,525 N/A 12" Install New 12" $ 911,335
2,636 N/A 24" Install New 24" $ 1,101,716
5,154 N/A 36" Install New 36" $ 3,481,785
17,093 N/A 48" Install New 48" $16,187,712
Total Project Cost $21,682,548
The precise location of the required mains is somewhat flexible, but in general will be from
thrd
Wagonwheel road (extended) in S. 19 to Goldenstein to South 3 to Nash Road (see exhibit
5.B.3 of the facility plan).
Given the priority of the Water Treatment Plant project, the City is not currently planning
to complete these projects.
Alternatives Do not build redundant transmission main.
Considered:
Advantages The city will be assured that water can be supplied even if one transmission main sustains
damage and is offline for a number of days.
of Approving
this Project:
Estimated Annual Operating & Maintenance Costs: Impact Fees can not be spent on annual operations and
maintenance costs. The Water Utility will see incremental increases in general maintenance
New Future
costs. Current cost estimate of $12,500 per water-main mile maintained annually.
Recurring
Costs:
Funding Impact Fee eligible portions are related to improvement costs beyond an 8” line capacity. At this
point in time, it is estimated that the 12” and 24” lines are most likely to be built within the next 5
Sources:
years; the cost of over-sizing those lines would be eligible for impact fees and is estimated to total
$1,874,886. Given the priority of the Water Treatment Plant project, it’s relative size and scope,
these improvements have been moved to “unscheduled.”
City of Bozeman Capital Improvements Plan FY11-15
Exhibit #1 –
New
Transmission
Main Map
City of Bozeman Capital Improvements Plan FY11-15
Project Name:
Graf Street Extension/Connection
Estimated Cost:
$150,000
Water Impact Fees – WIF Unscheduled
Project Number: Date
07Scheduled:
Purpose: New Replacement Facility Equipment
Project This project is to extend Water Mains below Graf Street approximately ¼
th
mile in order to connect infrastructure east from 19 Avenue.
Description:
This is an important connection for public safety purposes – allowing fire
service to meet their response time requirements in areas where they
currently cannot. The Water infrastructure should be installed at the same
time the street connection is made.
Alternatives Do nothing and wait for development to connect the infrastructure.
Considered:
Advantages of
Improved traffic flow and better emergency response to the local area.
Approving this
Project:
Estimated New Annual Operating & Maintenance Costs:
Future
Recurring
Costs:
Funding 100% Water Impact Fee – to be recovered by developer payback.
Sources:
City of Bozeman Capital Improvements Plan FY11-15
Project
Water Treatment Plant – Debt Service
Name:
Estimated
$5,000,000 Principal, plus accrued interest
Cost:
Water Impact Fees – WIF08 FY14-
ProjectDate
unknown
Number:Scheduled:
Purpose: New Replacement Facility Equipment
Project Total adjusted project price for the Water Treatment Plant (WTP) construction of
phase one is estimated at $40 Million.
Description:
Of that amount, $13.3 Million is for capacity expanding costs of construction.
The impact fee account will not have enough cash on hand to pay the costs of
construction when the facility is built. As such, impact fee revenues will be
dedicated to pay the outstanding debt in future years, as fee revenues are
collected.
At this point, approximately $5 Million of impact fee eligible costs will be paid
with a long-term loan (20 years, 4%) through the State’s Revolving Loan Fund.
A debt schedule will be updated semi-annually with the amount of impact fee
dollars that have been dedicated to debt payments until the full amount owed is
paid.
Alternatives
Considered:
Advantages Major capital expansion of the Bozeman WRF will enable the City to meet its
ever growing demand for wastewater services and still produce a high quality
of
effluent that is in full compliance with the City’s MPDES discharge permit.
Approving
Expansion of the Bozeman WRF is consistent with the City’s long-term need to
this Project:
accommodate rapid growth and economic development in the Gallatin Valley.
Estimated Annual Operating & Maintenance Costs:
Future
Recurring
Costs:
Funding FY08 Pilot Testing = $200,000 Total
67% Water Utility Fund = $133,000
Sources:
33% Water Impact Fees = $67,000
FY09 & FY10 Design = $3,000,000 Total
67% Water Utility Fund = $2,000,000
33% Water Impact Fees = $1,000,000
FY11 & 12 Construction = $37,000,000 Total
67% Water Utility Fund = $24,700,000
33% Water Impact Fees = $12,300,000
*We anticipate having a minimum of $8.3 Million available from Impact Fees
through the end of the construction period. Impact fee collections during the
construction period will be dedicated to the project. The remainder of eligible
construction costs would be dedicated to debt service on the Utility Revenue
Bonds, as it is collected in the Impact Fee Fund.
City of Bozeman Capital Improvements Plan FY11-15
City of Bozeman Capital Improvements Plan FY11-15