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HomeMy WebLinkAbout2014-8-6 City Council Presentation MWF Water Facilities Planning Study August 6, 2014 1 Water Facilities Planning Study Key Elements Existing facilities evaluation Production Storage Pumping capacity Distribution Population & Demand projections Capital Improvement Plan City of Rexburg WFPS 2 Population & Demand Projections Population 2010 Census 25,484 people Projected populations Provided by the City Max growth rate of 6.8% Influenced by BYU-I growth 2023: 44,671 people 2033: 54,451 people 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 3 Production Capability 8 wells supply water the City 1,400 gpm of new supply is needed for every additional 5,000 people Firm capacity = maximum pumping capacity with the largest well off-line City of Rexburg WFPS 4 Storage Capacity Components: Equalization, Fire Suppression, Standby, Operational, Dead Evaluated separately for each of the three pressure zones: upper, middle and lower Plan on 1 MG of storage for every 12,500 additional people City of Rexburg WFPS 5 Delivery Capacity Capacity of wells, boosters, PRVs, and tanks to supply water to the system Evaluated separately for each of the three pressure zones Available Capacity is the Firm Capacity with the largest pump offline City of Rexburg WFPS 6 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 7 Capital Improvement Plan Priority 1.1 Improvements – High Priority Improvements completed within next 5 years Priority 1.2 Improvements – Designed by City within next 5-10 years Priority 1.3 Improvements – Funded by Developers Priority 2 Improvements – Future Growth Expansion by 2040 City of Rexburg WFPS Figure 8.1 Figure 8.2 8 Rate Impacts Priority 1.1 Improvements $6.7 million in total estimated project costs (construction, engineering, contingency) DEQ offered a loan for $9.5 million 30 year loan at 1.75% interest $770,894 of principal forgiveness Annual Increase in System Costs - $706,500 Annual increase includes: IDEQ annual payment, equipment reserve, O&M costs for new equipment and increase in existing O&M replacement funds User rate increase of $7.50 to $8.75 depending on funding scenario Total Monthly Base User Rate of $23.45 to $24.60 City of Rexburg WFPS 9