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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />'I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />b. Gurlev Reservoir. Key to the Gurley system is <br />Gurley Reservoir. The reservoir was initially <br />constructed in the early 1900's and has received <br />many improvements since then, including: a) raising <br />the dam height in the 1950's, and b) new outlet <br />works and leakage mitigation in 1988. The reservoir <br />is located at the upper (south) end of the Maverick <br />Draw (Gurley canyon) drainage area just below a flat <br />divide known as Goshorn Flats; capacity is <br />approximately 11,432 acre feet. The reservoir water <br />surface, per a U.S.G.S, map, is at an elevation of <br />8264 feet, which is considerably higher than the <br />present service area. Water quality (color and <br />turbidity) of both inflows and outflows to and from <br />the reservoir is often poor. Inflow turbidity is <br />due to sediments obtained from Gurley Ditch in the <br />Goshorn Flats area; the outlet pipe is near the <br />bottom and picks up any settled material. <br /> <br />c. Gurlev Ditch. The Gurley Ditch consists of an upper <br />and lower ditch. The upper segment, which is <br />entirely a constructed ditch, conveys water from <br />Beaver Creek and tributaries to Gurley Reservoir. <br />This segment is not used directly by the Norwood- <br />Wrights Mesa system. <br /> <br />Below Gurley Reservoir, the lower segment of Gurley <br />Ditch conveys reservoir release and overflow water <br />north to the service area to shareholders, including <br />the Norwood water system diversion. This lower <br />segment of Gurley Ditch, up to the Town's diversion, <br />follows the natural Maverick Draw or Gurley Canyon, <br />and is similar in appearance to small, high <br />elevation mountain streams. Below this, the Gurley <br />ditch is a combination of natural and constructed <br />drainages. <br /> <br />d. Operation of Gurlev System. The Gurley system was <br />developed to deliver irrigation water and its bylaws <br />have certain restrictions when water would be <br />available. A review of the annual cycle for inflow <br />and release on Gurley Reservoir is important in <br />order to understand the feasibility of using this <br />water for the Town's system. (See also section C2.) <br /> <br />According to information provided by the company's <br />ditch rider, direct flow water starts within two <br />weeks of May 1st and ends between June 1 and July <br />1st. The outlet works is closed by law on October <br />1st. Thus, water in Gurley Ditch is available for a <br />period ranging from April 15th/May 1st to October 1, <br />or 20 to 22 weeks during the year. The earliest <br />closing of the headgate at Gurley Reservoir occurred <br />on July 25, 1990, when the reservoir emptied. The <br /> <br />IV-10 <br />