24-Deliberate on the Lake Pat Mayse Water Study Committee recommendations

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HDR-00085438-001 Executive Summa water. 1 acre-foot equals 325,840 gallons. The abbreviation for acre-feet used throughout this report is "acft" and the abbreviation for acre-feet of water per year is "acft/yr". • Million Gallons per Day - This is a conunon measurement of a rate of water. One Million Gallons per Day is the quantity of water pumped or supplied equal to 1,000,000 gallons over a day's time (24 hours). The abbreviation for Million Gallons per Day is MGD. A flow of 1 MGD will deliver 3.07 acft/day or 1,120 acft/yr. • Finn Yield - the amount of water that can be diverted from a reservoir each year through a repeat of the historical drought of record such that all reservoir conservation storage is diverted with no shortages. ES.2 Estimated 2060 Population and Water Demands The City supplies raw and treated water from Pat Mayse Lake and Lake Crook to its residents and custoiiiers. Eaisting customers include: Lamar County Water Supply District (LCWSD), Campbell Soup Corporation (Soup), Lamar Power Partners (LPP), and Direct Energy (DE). Table ES-l shows year 2060 population estimates for the City and LCWSD as prepared by the Texas Water Development Board (TWDB), and as modified by the Conunittee and HDR. Figure ES-1 compares the TWDB's projections from the 2007 State Water Plan (refen•ed to as TWDB Future Population Projections) and the TWDB modified population projections for the City and LCWSD. TWDB population projections available for LCWSD were also modified by HDR based on infonnation provided by LCWSD taken from their master plan regarding nui7iber of future coimections (meters) and deinand. HDR utilized this infonnation to develop a modified population projection for the LCWSD service area. Figure ES-2 shows the comparison of the original TWDB population estimates and the HDR modified values based on the infornlation provided by the LCWSD. The figure shows that the 2060 population estimates derived from the LCWSD inforniation are significantly higher than the TWDB original estimates. For example the 2060 population estimate based on the LCWSD information is 63,427 which is 25,053 residents or 64 percent higher than the TWDB's estimates. Tlle estimates of population developed using LCWSD information are believed to be conservatively on the high side. Estimates of future Ciry of Paris - Pat Muyse Lake Study ES-2 tul January 2009 - Draft ,'21 t..~ ~1 Es 6 J