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installed meters on the irrigation water line for every individual residential lot in Wadley <br />Farms No. 3. The meters are read monthly during the irrigation season. The readings are <br />reported to the homeowner, along with information on how much of the homeowner's <br />annual water allocation has been used to that point. The HOA has the authority under the <br />Wadley Farms No. 3 Bylaws and Covenants (included in Appendix B) to fine <br />homeowners who use more than their allocation and to lock the meters for homeowners <br />who do not comply with water use restrictions. <br />The irrigation water demand for bluegrass lawns in the northern Colorado Front Range <br />has been evaluated by the Northern Colorado Water Conservancy District. (See Appendix <br />E.) The analysis determined that the irrigation water requirement for a low maintenance <br />lawn averaged 23.0 inches (14.3 gallons /sq.ft.) per year and for a traditional lawn <br />averaged 26.9 inches ( 16.7 gallons /sq.ft.) per year when an irrigation efficiency of 80% <br />is assumed. Wadley Farms No. 3 homeowners are limited by the neighborhood <br />covenants to an irrigated area of no more than 8000 square feet per lot. The typical lawn <br />within the subdivision is somewhere between a traditional lawn and a low maintenance <br />lawn and, therefore, might have an annual irrigation water requirement of 25.3 inches <br />(15.75 gallons /sq.ft.) If all 109 residential lots in Wadley Farms No. 3 were to irrigate <br />the full allowed area of 8000 square feet, it would equal 20.0 irrigated acres. Therefore, <br />the average annual irrigation water delivery requirement for the subdivision is 42.2 <br />at This corresponds with the typical annual water allocation of 126,000 gallons (0.39 <br />acre -feet) given for each lot for the period from mid -May to October, which equates to <br />42.15 acre -feet if all 109 lots were to fully irrigate 8000 square feet. <br />In most years since metering began in 2003, almost three- quarters of the Wadley Farms <br />No. 3 homeowners have used less than their allocation. Therefore, the total annual water <br />use for the subdivision has historically been less than 42.2 acre -feet. In a very hot, dry <br />year when irrigation use is not restricted, the annual irrigation requirement might be as <br />much as 42.4 inches (26.4 gallons /sq.ft.) or 70.7 acre -feet. In dry years with limited <br />water availability, the HOA board of directors has the authority to limit use of the <br />irrigation supply to less than this amount. Therefore, even in hot dry years. the HOA has <br />the means to limit water use in the event that water supplies are also limited clue to <br />drought. <br />Losses for evaporation from the surface of the reservoirs must also be included in the <br />annual demand. The total surface area of the three Wadley Reservoirs is about 24 acres. <br />Using evaporation factors for the northern Colorado Front Range from the NOAA <br />Evaporation Atlas, the net evaporation loss from the three reservoirs every year averages <br />26.4 inches per year or 52.8 acre -feet. Net evaporation losses will increase in hot, dry <br />years and decrease in wetter, cooler years. In dry years, net evaporation loss might reach <br />39.4 inches or 78.8 acre -feet from the three reservoirs. <br />The total amount of water needed by Wadley Farms No. 3 in an average year for <br />irrigation and reservoir evaporation is 95.0 acre -feet (42.2 + 52.8). In a dry year, if no <br />water use restrictions were put in place, water demand could be as much as 149.5 acre - <br />feet (70.7 +78.8). In a drought year with limited water supplies, the HOA could restrict <br />Wadley Farms No. 3 Water Supply CWCB Loan Feasibility Study Page 18 <br />