City of Polson
April 16, 2012
PUBLIC HEARING
Water System Improvements
PRESENTATION OF
2012 PRELIMINARY
ENGINEERING REPORT
Project Scope
 Revise/Update 2010 Preliminary Engineering
Report (PER)
 Incorporate Results from Hydraulic Modeling
Performed by TD&H in 2010.
 Identify short and long-term water system
problems, evaluate alternatives.
 Develop & prioritize solutions (projects).
 Pursue Financial Assistance (TSEP)
 Evaluate Environmental Impacts –
Environmental Assessment.
 Keep the Public Informed
Water System Evaluation and
Problem Resolution
 Supply
 Storage
 Distribution – Water Mains, Valves
and Hydrants
 Funding
PER Considers Next 20 Years:
Census Date
Polson
Population
1960
1970
1980
1990
2000
2010
2,314
2,464
2,798
3,291
4,041
4,488
Ten-Year
Percent Increase
----6.5%
13.6%
17.6%
18.6%
11.1%
Polson
Annual Increase
0.63%
1.28%
1.63%
1.72%
1.06%
Other Considerations on Population Projections:
 2006 Polson Growth Policy: 1.4% annual growth strictly
based on birth/death (no annexation)
 2011 Polson Transportation Policy: 1.4% annual growth,
likely repressed by economy and limitations on
developable land. “Data suggests that growth could be
higher with annexation”.
 If possible, it is wise to plan beyond 20-years with
buried/permanent infrastructure
PER Growth Rate:
With the previously-mentioned Considerations,
the PER presumes an annual growth rate of 3%.
 Indications of recovering economy and
community growth.
 Over 1,500 people live outside City boundary,
expected to grow to 2,260 by 2030.
 Approximately 1.3 miles² of developable land
recently serviced by water and/or sewer
Project Design Criteria
Table III-1 2012 Water System PER – PROJECT DESIGN CRITERIA
City of Polson
Existing and Projected Water Use
ADD (Average Daily Demand in GPD)
ADD (GPM)
Estimated Population*
GPCD (ADD/Population)
Population/2.25 Household = EDU
Est. Commercial/Inst. EDU's
Total EDUs
Use/EDU (GPCD)
ADD with 10% Reserve Capacity (GPM)
MDD (Max. Daily Demand) = ADD X 2.2 = GPD
MDD (GPM)
PHD (Peak Hourly Demand)= 2.5 X MDD = GPM
Pump Capacity* (GPM)
Pump Capacity w largest Pump out of Service
* Utilized 3% annual growth rate
Existing
Projected*
2007
2008
2009
2010
2011
2012
2022
2032
652,350
431.8
4,349
150
1,932
527
2,459
265.3
670,553
466
4,395
153
1,953
543
2,496
268.6
727,927
506
4,441
164
1,973
559
2,532
287.5
760,194
528
4,488
169
1,995
568
2,563
296.6
706,740
491
4,622
153
2,054
572
2,626
269.1
700,000
486
4,761
147
2,116
576
3,187
260
535
927,855
622.1
6,399
145
2,844
774
3,618
261.7
797
1,247,000
866.0
8,600
145
3,822
1041
4,863
256.4
1071
1,540,000
1,069
2,674
1,870
1,370
2,041,280
1,418
3,544
1,870
1,370
2,743,400
1,905
4,762
1,870
1,370
1,435,170 1,475,217 1,601,440 1,672,427 1,554,828
997
1,024
1,112
1,161
1,079
2,493
2,561
2,780
2,904
2,700
1,870
1,870
1,870
1,870
1,870
1,370
1,370
1,370
1,370
1,370
Supply Issues
City of Polson
Water Demand and Supply
2012
2022
2032
ADD with 10% Reserve Capacity
MDD (GPM)
Current Pump Capacity (GPM)
Pump Capacity* (GPM)
535
1,069
1,870
1,370
797
1,418
1,870
1,370
1,071
1,905
1,870
1,370
*with largest well out of service
Supply Issues
Supply Solutions:
 Obtain New Sources of Groundwater (Top
Priority)
 Continue to address UAW
 Remain Involve in All Water Rights
Negotiations, Further Investigate Existing
Rights
Potential New
Well Site
Hydraulic Modeling:
 Computer model utilized to evaluate distribution
system and storage.
 System subjected to ordinary and extreme
demand conditions (fire flows, etc.)
 Model predicts behavior of wells, booster
stations, storage tanks, watermains, PRV’s.
 Identifies areas of low pressure, insufficient
storage, etc.
 Results used to identify priority projects.
Storage Solutions:
 Two Tanks Completed 2011
 Renovate Interior Tank Coating on Skyline steel
(in progress)
 Plan for Future Storage near Woodbine Tank
Distribution System Solutions:
 Downtown Water Main Improvements
(Top Priority)
 Install East-West Transfer Main –
Skyline to Woodbine (In progress)
 Hydraulic Restrictions (6-8 blocks)
 Water Main Looping
Downtown – low
pressures (high
priority)
Hydraulic Restrictions
Summary of (Remaining)
High Priority Needs
 Supply
 Construct New Well on East Side
 Distribution
 Downtown Main Upsizing
Cost Summary
 New Well - $231,945
 Downtown Improvements - $1,177,700
Total High Priority Needs
Total Construction Cost
$ 1,000,000
Contingency
$
180,000
Engineering
$
200,000
Legal, Administration
$
100,620
TOTAL PROJECT COST
$
1,480,620
Financial Assistance
 Treasure State Endowment Program: up to
$625,000 grant (Applied 2010 – not awarded)
 DNRC Renewable Resources Grant: up to
$100,000 grant (Applied 2010 – awarded)
 Montana State Revolving Loan Fund: 2.75%
and 3.75% loans
“Funding based on affordability”
Existing Rates for
Water and Sewer Service
Current “Typical” Water Rate
Current “Typical” Sewer Rate
Combined Rate
$22.30
$28.75
$51.05
“Target Rate*” Used for Funding = $ 41.92
* - Target Rate = 2.3% of MHI
Polson is eligible for TSEP funding
Cost for Ratepayers
Assumptions- No Local Funds, Use SRF Loan
Funds @ 3.75% for 20 Years
Debt Amount
# EDU’s
Debt Cost - $/user·mo.
Coverage (25%) – $/user·mo.
O&M - $/user·mo
Cost per User
$
$
$
$
$
No Grant
1,480,620
1966
4.62
1.15
0.64
6.41
50% Grant Funding
$
755,620
1966
$
2.36
$
0.59
$
0.64
$
3.58
Potential Project Schedule
 Grant Applications due May of 2012
 Grant Funds Available in Summer 2013
 Design 2013
 Bid/Construct 2014
Environmental Assessment:
 The PER includes an Environmental
Assessment – available for public review.
 Short-Term Impacts:
 Construction-related: noise, dust, heavy
equipment.
 Traffic disruption, public safety.
 Long-Term Impacts:
 Localized groundwater impacts. Expected
to be marginal given the porous nature of
the aquifer. (Applied Water
QUESTIONS?
Contacts:
Paul Montgomery, P.E. – 449-3303
or
Tony Porrazzo – 883-8215
THANK YOU!!
2012 Project Budget
City of Polson
ADMIN/FINANCIAL COSTS
Personnel Costs
Office Costs
Professional Services
Legal Costs
Audit Fees
Travel & Training
Loan Fees
Loan Reserves
Interim Interest
Bond Cost
CIP Preparation
SOURCE
RRGL
$0
$0
$12,000
$0
$0
$0
$0
$0
$0
$0
$0
SOURCE
TSEP
$0
$0
$6,000
$1,000
$0
$0
$0
$0
$0
$0
$0
SOURCE
SRF
$3,000
$0
$4,000
$0
$2,000
$0
$2,000
$55,620
$0
$15,000
$0
SOURCE
Local Res.
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
$0
TOTAL ADMIN/FIN. COSTS
$12,000
$7,000
$81,620
$0
RRGL
$0
$0
$50,000
$0
$38,000
$0
TSEP
$0
$0
$50,000
$50,000
$518,000
$0
SRF
$0
$0
$0
$50,000
$444,000
$180,000
Local Res.
$0
$0
$0
$0
$0
$0
TOTAL ACTIVITY COSTS
$88,000
$618,000
$674,000
$0
TOTAL PROJECT COSTS
Percentage of TPC
$100,000
7%
$625,000
42%
ACTIVITY COSTS:
ROW - Easements
Preliminary Engineering
Final Engineering Design
Construction Inspection
Construction
Contingency
% Grant Funding
49.0%
EDU's:1966
TPC/2 =$740,310
-$115,310
$633,310
TSEP Amount
$755,620
$0
51%
O&M Impact
$15,000.00
$7.63
$0.64O&M/month
April-12
TOTAL
$3,000
$0
$22,000
$1,000
$2,000
$0
$2,000
$55,620
$0
$15,000
$0
$100,620
6.8%
TOTAL
$0
$0
$100,000
$100,000
$1,000,000
$180,000
$1,380,000
93.2%
$1,480,620
Debt
Service
20-year SRF loan
$755,620
4% I=0.0736
$55,613.63
1966EDU's
$28.29
12months
$2.36Debt Svc.
$0.5925% Coverage
$2.95
$3.58
Total Debt Service
User Rate Increase
2010 Project Design Criteria
2010 Water System PER
City of Polson
Existing and Projected Water Use
ADD (Average Daily Demand in GPD)
ADD (GPM)
Estimated Population*
GPCD (ADD/Population)
Population/2.32 Household = EDU
Est. Commercial/Inst. EDU's
Total EDUs
Use/EDU (GPD)
2005
765831
531.8
4,849
158
2090
497
2587
296.0
Existing
2006
2007
2008
2009
817957 760813 718456 749012
568.0 528.3 498.9 520.1
4,985 5,089 5,228 5,385
164
150
137
139
2149
2194
2253
2321
512
527
543
559
2661
2721
2796
2880
307.4 279.7 256.9 260.1
ADD with 10% Reserve Capacity (GPM)
MDD (Max. Daily Demand) = ADD X 2.2 =
GPD
MDD (GPM)
PHD (Peak Hourly Demand)= 2.5 X MDD =
GPM
2010
Projected
2020
2030
776440
539.2
5,546
140
2391
576
2967
261.7
593.1
1043560
724.7
7,454
140
3213
774
3987
261.7
797.2
1402380
973.9
10,017
140
4318
1041
5359
261.7
1071.3
1878985
1305
2525415
1754
3393760
2357
Pump Capacity* (GPM)
2120
2120
2120
2120
2120
3262
2120
4384
2120
5892
2120
Pump Capacity w largest Pump out of
Service
1600
1600
1600
1600
1600
1600
1600
1600
* Utilized 3% annual growth rate