Rockville Water Forum Water Master Plan Report Water Master Plan - PowerPoint PPT Presentation

August 20, 2015 Rockville Water Forum Water Master Plan Report

Water Master Plan Overview • User Analysis  Historic Growth Rate  Connections / Equivalent Residential Units (ERUs)  Planning Period / Projected Growth  Historic Water Usage • 5 Point System Analysis  Water Rights  Water Source Capacity  Water Storage Capacity  Water Treatment  Water Distribution

User Analysis • Historic Growth  Used 2010 Census Number as Population Basis • Existing Connections / ERUs Active Inactive Other Total ERU's Year Residential Residential Connections Connections Connections 2011 135 17 0 152 2012 132 20 0 152 2013 132 20 0 152 2014 129 23 0 152

User Analysis • Planning Period  20 – Years for Water Infrastructure  40 – Years for Water Rights • Projected Growth  Assumed to Follow Historic Growth at 1.5%  Assumes no Major Developments • 2034 Population = 342 • 2034 ERUs = 207 • 2054 Population = 461 • 2054 ERUs = 279

User Analysis • Historic Water Usage  Average Daily Usage = 250 gpd/connection  Based on the Number of Active Connections  Much Lower than State Guideline of 400 gpd/conn

5-Point Water System Analysis Water Rights • Rockville Pipeline Company Water Rights  Max Flow Rate = 67.3 gpm  Total Annual Right = 113.4 Acre-Feet • State of Utah Requirements (Average Day)  Supply each ERU with 400 gpd Indoor + Outdoor Usage or Use Historic Average Day Usage (250 gpd)

5-Point Water System Analysis Water Rights • Existing Required Water Right • Projected Required Water Right (40-Year)  Projected Surplus of 35 Acre-Feet

5-Point Water System Analysis Water Source Capacity • Existing Water Source Capacity  Max Pump Capacity = 40 gpm  Sustainable Capacity = 21 gpm • Considers Pumping & Recharge Time • State of Utah Requirements (Peak Day)  Supply each ERU with 800 gpd Indoor + Outdoor Usage or Use 2 x Historic Average Day Usage (500 gpd)

5-Point Water System Analysis Water Source Capacity

5-Point Water System Analysis Water Source Capacity • Existing Required Source Capacity • Projected Required Source Capacity (20-Year)  Projected Deficit of 51 Acre-Feet

5-Point Water System Analysis Water Storage Capacity • Existing Water Storage Capacity  Total Storage Capacity = 400,000 gallons • State of Utah Requirements (Average Day + Fire)  Supply each ERU with 400 gpd Indoor + Outdoor Usage or Use Historic Average Day Usage (250 gpd)  Fire Demand = 1,000 gpm for 2 hrs = 120,000 gallons

5-Point Water System Analysis Water Storage Capacity

5-Point Water System Analysis Water Storage Capacity • Existing Required Storage Capacity • Projected Required Storage Capacity (20-Year)  Projected Surplus of 228,292 gallons

5-Point Water System Analysis Water Treatment • Rockville Pipeline Company - Treatment  Continuous Disinfection • State of Utah Requirements for Groundwater Sources not under the Influence of Surface Water  Continuous Disinfection (Recommended)  Maximum Contaminant Levels (MCLs) – R309-200

5-Point Water System Analysis Water Treatment

5-Point Water System Analysis Water Treatment • Radium 228 – Prior exceedance of 5 pCi/L MCL  Back below MCL, but required to have a plan in place in case of future exceedance.

5-Point Water System Analysis Water Distribution • State of Utah Requirements  40 psi – Peak Day Demand  30 psi – Peak Instantaneous Demand  20 psi – Peak Day & Fire Demands • See Peak Day with Fire Exhibit

Questions?