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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 />1 <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />A. <br /> <br />CHAPTER III <br /> <br />EXISTING WATER SUPPLY FACILITIES <br /> <br />RAW WATER SYSTEM <br /> <br />1. Diversion and Collection Systems. <br /> <br />The major source of water is from Gurley Reservoir; <br />however, Norwood has other water rights which allow <br />diversion of runoff and seepage water from the <br />drainage area around Gurley Canyon (upper Maverick <br />Draw), All of the diversion facilities are located <br />nearly 4 miles southeast of Norwood adjacent to <br />Gurley Ditch and include the following (Figure IlI- <br />A) : <br /> <br />a. Diversion Dam. Headqate and Pipeline on Gurlev <br />Ditch. The primary surface diversion structure <br />(hereafter referred to as the Town headgate) <br />which provides water to the Norwood system is on <br />the Gurley Ditch, about 300 yards upstream of <br />Gardner Spring and downstream of Gurley <br />Reservoir. The headgate structure is a low <br />concrete dam with a central overflow weir; a <br />sliding headgate is located on one of the wing <br />walls. The headgate is facing diagonally <br />upstream in the ditch; this orientation is more <br />inclined to clog with debris than if it were <br />perpendicular to flow. A Parshall flume is <br />located downstream from the diversion, ~ut is <br />probably inaccurate due to its poor condition. <br />A 10 inch solid (non-perforated) pipeline <br />carries water from the headgate on Gurley Ditch <br />directly into the Town Reservoir. This pipeline <br />also has 2 to 4 side delivery pipes located in <br />the field below the headgate, which can divert <br />water into several infiltration ponds. <br /> <br />b. Infiltration Pipe Below Infiltration Ponds. <br />This is a buried pipeline in the alluvial bed of <br />Gurley Canyon below the headgate and consists of <br />two segments. The upper segment, installed in <br />1963, is 10 inch dia. perforated clay pipe and <br />underlies the infiltration ponds discussed <br />above. The lower pipeline is solid 6 inch PVC <br />and carries water around the raw water reservoir <br />directly to the water plant. The headgate <br />pipeline and infiltration pipelines are not <br />connected. The 6 inch PVC was installed in 1983 <br />and 1984 to replace a corroded 10 inch steel <br />pipe. <br /> <br />III-1 <br />