09/05/2007 Council Packet - Laserfiche WebLink

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DRAFT 8 -17 -07 III. FUTURE WATER DEMANDS FOR LINO LAKES As the seven county metro area continues to add households and increase in population, the ability of ground water aquifers to supply and meet the future water demands of the area at the current rate of water use (gallons per person) is a major concern. The Department of Natural Resources (DNR) and the Metropolitan Council are both currently looking at the future water demand of the metro area and how best to serve the projected demands. Water conservation and wise use of the available water resources will provide considerable benefit to the growing communities and the region in future years. Every ten years, all metro communities must complete and submit their Water Emergency and Conservation plans to the DNR and the Metropolitan Council for approval. Permits by the DNR for increases in water appropriations and for new wells will require that the communities meet specific benchmarks and conservation measures regarding water use in their service area. These conservation measures will allow our existing ground water supplies to serve a larger regional population. These DNR required benchmarks and conservation measures were used in projecting the future water demands for the City of Lino Lakes. As a result, the future water demand projections used in this study are Tess than water demands used in prior studies. The ultimate population, used in this study, for the City of Lino Lakes is estimated to be 43,000 people of whom 42,000 people will be served by the City water system. The rest of the population will continue to be served by private wells. Currently the City has an average residential gallons per capita per day (gpcd) water use of 86 gallons and a total per capita per day water use of 102 gallons which includes the commercial, industrial and institutional water uses. The current maximum day to average day ratio is 3.4 to 1. By using the ultimate served population, current water use and future water use estimates, one can estimate the future ultimate water demands for the City. Using the recent 5 -year average of 102 gpcd, the future average daily water demand will be 4.3 MGD (million gallons per day). Then by applying the DNR Benchmark for the maximum day to average day ratio of 2.6 to 1, the future maximum day demand will be 11.1 MGD for the City system. Water Treatment Plant Study 4 13843.000