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<br />~ <br />00 <br />- <br /> <br />Example: Suppose you want to develop a water supply for the town <br /> <br />of Cornforth from a high mountain stream called Bill <br /> <br />Raley Creek, but had no stream flow records. <br /> <br />Solution: From a map you could determine the size of drainage area <br />, <br /> <br />in square miles and the weighted elevation. Assuming <br /> <br />we found the drainage area to be 10 square miles ,and the <br /> <br />weighted elevation to be 9,500 feet. <br /> <br />Using the graph of weighted elevation vs. mean runoff (Plate 1): <br /> <br />Average runoff = 442 AF/Sq.Mi. x 10 Sq. Mi. <br /> <br />'" 4,420 AF/Year <br /> <br />This procedure was used to estimate runoff from mountain streams in the <br /> <br />San Miguel Drainage Basin. <br /> <br />A map (Plate '2) has been prepared showing areas of potential water supply <br /> <br />from some of the high elevation streams in the SanMiguel Project area. <br /> <br />, <br />;., <br /> <br />Many of these areas are presently being tapped for water supply to some <br /> <br />degree. <br /> <br />i" <br />) <br /> <br />The average runoff estimated from these areas is tabulated below: <br /> <br />Water Supply (Acre-Feet) 1/ <br /> <br />, <br />iF: <br />;~. <br /> <br /> Acres <br /> Presently Average Currently Remaining <br /> System Served 11 Runoff Developed Runoff <br />Gurley Canal 10,780 Y 24,000 22,000 2,000 <br />Cone Canal 5,300 2,200 3,100 <br />Hughes Canal 1,000 17,900 4,000 13,900 <br />Lilylands Canal 500 6,600 2,000 4,600 <br />11 Estimated <br />Y Lands under Gurley and Cone system have been combined <br /> 2 <br /> <br />> <br />7'~ <br />:,.,:' <br />~{ <br />:.~ <br /> <br />;'.' <br /> <br />-.; <br /> <br />i~.; <br /> <br />.; I <br />