HomeMy WebLinkAbout2015-2-4 City Council Presentation.pptx
Water Facilities Planning Study
February 4, 2015
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Water Facilities Planning Study
Purpose of the Public Hearing
Present the Findings of the Facilities Planning Study
Alternatives considered
Potential environmental impacts
Funding options
User rate impacts
Receive Public Comment
Select Alternatives
City of Rexburg WFPS Slide 2
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Water Facilities Planning Study
Progress Since August 2014
Identify Additional Distribution System Areas
Old and undersized waterlines
Maintenance problems
Prepare cost estimates
Update Capital Improvement Plan/user rate impacts
Environmental Impacts
Received technical approval of the planning document
Opened public comment period January 15, 2015
City of Rexburg WFPS Slide 3
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Water Facilities Planning Study
Key Elements
Existing facilities evaluation
Production
Storage
Pumping capacity
Distribution
Population & Demand projections
Capital Improvement Plan
Environmental Information Document
City of Rexburg WFPS Slide 4
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Population & Demand Projections
Population
Demand
1Average Summer demand is Jul- Aug
2Average Winter demand is Nov-Mar
3Max day was in July 2012
4Peak hour was taken to be 1.64 X Max day based on a composite of
July 1 - July 4, 2012 hourly demands
5Population estimate interpolated from City projections
City of Rexburg WFPS Slide 5
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Production Capacity
8 wells supply water to the City
1,400 gpm of new supply is needed for every additional 5,000 people
Firm capacity = pumping capacity with the largest well off-line
City of Rexburg WFPS Slide 6
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Storage Capacity
Components: Equalization, Fire Suppression, Standby, Operational, Dead
Each pressure zone evaluated separately
Plan on 1 MG of storage for every 12,500 additional people
City of Rexburg WFPS Slide 7
Zone 1
Zone 2
Zone 3
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Delivery Capacity
Capacity of wells, boosters, PRVs, and tanks to deliver water to the system
Three pressure zones evaluated separately
Available Capacity is capacity with the largest pump offline
City of Rexburg WFPS Slide 8
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Distribution System
Evaluated for:
MDD + Fire Flow
PHD
Low Demand/High Pressures
Improvements to address fire flow failures, low pressures during PHD scenario, and high pressures during low demand scenarios
City of Rexburg WFPS Slide 9
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Capital Improvement Plan
Priority 1.1 Improvements – High Priority Improvements completed within next 5 years
Priority 1.2 Improvements – City projects during the next 5-10 years
Priority 1.3 Improvements – Privately Funded
Priority 2 Improvements – Future Development
Figure 8.1
Figure 8.2
City of Rexburg WFPS Slide 10
All costs in 2014 Dollars. Costs include engineering and planning contingencies.
CIP Summary
Figure 8.1a
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Rexburg Priority 1.1 Improvements
New Blackfoot Booster Pump Station
and 2.2 Million Gallon Tank
New well by North Well at 1,600 gpm
New high school well at 2,000+ gpm
2.5 million gallon storage tank
1,600 gpm booster pump at North Well Booster Station
3 booster pumps at 1,200 gpm each at new high school well
Control system improvements
45,000 feet of pipeline
City of Rexburg WFPS Slide 11
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Rate Impacts
Priority 1.1 & 1.2 Improvements
$11.1 million in total estimated project costs
(construction, engineering, contingency)
If DEQ loan offer is increased to $11.1 million:
30 year loan at 1.75% interest
$900,210 of principal forgiveness (8.1% of loan)
Annual Increase in System Costs - $523,707
Loan repayment and debt reserve - $483,907
O&M Increase - $39,800
Changes to Typical User Rate:
User rate increase of $6.49 per month
New Total Monthly Base User Rate of $22.36 per month
City of Rexburg WFPS Slide 12
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Environmental Impacts
City of Rexburg WFPS Slide 13
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Environmental Impacts – Well Sites
City of Rexburg WFPS Slide 14
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Environmental Impacts
City of Rexburg WFPS Slide 15
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Water Facilities Planning Study
Next Steps
Select Alternatives
Agency Consultation
Finalize Environmental Information Document
Authorization to Bond
Secure Funding
Design Improvements
City of Rexburg WFPS Slide 16
Questions?
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