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I I I I I I I I I I L/'''IIUI \. VIl-C; - L..'Cld..'C1 - n. 1"1. V'lllt:'t:It:1 a t'\;).:)Vl".lal,.C;)t J.III.... \.A.II "'~....- w. W. WHEELER AND ASSOCIATES. INC. CONSULTING I!:NOINEERB SUIT!': 201 770 WEST HAMPDEN AVENUE ENGLEWOOD, COLORAOO 80110 PHONE 761~4131 October 17. 1979 Mr. Davi d Bu rke Professional Design Services, Inc. 1024 Eighth Street Greeley, Colorado 80631 Re: #568 I I I I I I I I I Dear Mr. Burke: As requested in your letter of October 11, 1979, we have pre- pared some information concerning water supply for the Parkville Water District, The enclosed table contains estimates of the dry year flow from Big Evans Gulch and Iowa Gulch, diversions from those sourceS of water supply, and annual water requirements by the District. As shown in the table, diversions during the period of May through July are generally limited by the capacity of the treatment or diver- sion facilities or by the District's water requirements, Diversions from August to April in a dry year may be limited by the physical supply in Big Evans and Iowa gulches, Supplemental water during these periods of shortage is obtained from several groundwater sources, These sources are also generally limited during the winter months and entail a considerable pumping expense. Therefore, the existing practice of the District is to maximize use of the surface water supplies. The District is planning to construct new treatment facilities for the Big Evans Gulch supply and probably also for the Iowa Gulch supply, These facilities will not substantially alter the District's water diversion capaci ty. The estimated population presently being served by, the District is about 7,000, Included in the table are estimates of water require- ments for larger populations that may be served in the future, Our concerns regarding future human development in Big Evans Gulch and Iowa Gulch are twofold, First, any diversion of water that A - 2