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<br />O~""!3 <br />~ J ".4 (, _:_ --..;: <br /> <br />snowfall year, a substantial amount ot water could be needed <br />although all (wCB instream flow requiranents will be met. <br /> <br />In the water use plan of <br />acre-feet are estimated <br />November and December) <br />streamflow. <br /> <br />augmentation, snowmaking demands in <br />to be 52 acre-feet per year (in <br />with 42 acre-feet returning as <br /> <br />Water and sewer for mountain buildings will be provided by <br />on-site services consistent with the state of Colorado <br />staroards and reguiranents. Specific designs will not be <br />available until the Master Development Plan stage; but based <br />on ski industry averages of metered flows from other <br />comparable ski resorts in COlorado, the follCtNing water use <br />amounts are estiIPated at each of the restaurant sites for <br />water and sewer services: <br /> <br />~ <br /> <br />Skiers <br /> <br />GalR./Ca~.Dav r~ls.lDqy <br /> <br />1. Mountain Restaurant <br />2. loDuntain Restaurant <br />3. Mountain Restaurant <br /> <br />2500 <br />2500 <br />200 <br /> <br />@ <br />@ <br />@ <br /> <br />20 <br />20 <br />20 <br /> <br />= 50,000 <br />= 50,000 <br />= 4,000 <br /> <br />c. water 011.1=11 ity <br /> <br />(1) Alternative One <br /> <br />Non-point source impacts from developnent on private land <br />were estimated using data developed from the Nationwide Urban <br />Runoff Program. 11 Water quality characteristics of urban <br />runoff are summarized in Table IV-4. The values in Table <br />IV-4 are recanmended for planning level purposes as the "best <br />description of the characteristics of urban runoff. "As <br />verified by personal canmunications with Mr. Bruce Zander, <br />U.S. Envirollnental Protection Agency, Denver, Colorado, <br />annual loading of the constituents sUImlarized in Table IV-5 <br />is obtained by multiplying the event mean concentrations <br />times the total number of "events" per year from rainfall and <br />snowmelt. <br /> <br />The number of events per year was determined by simulating a <br />water balance using the Subalpine Water Balance ~lodel Y. <br /> <br />Jj U.S. Envirornental Protection Agency. 1983 Results of <br />the Nationwide Urban Runoff Program: VOl.-I, Final <br />Report. WH-554, Water Planning Div. Washington, D.C. <br /> <br />2/ Leaf, Charles F. and Glen E. Brink. 1973. Hydrologic <br />SillUllation Model of Colorado Subalpine Forest. USDA <br />For. Ser. Res. Pap. RMl07, Rocky Mtn. For. & Range Exp. <br />Stn. Ft. Collins, 00. <br /> <br />169 <br />