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<br />III-3 <br /> <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 />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />2. Town Raw Water Reservoir. <br /> <br />construction Features. The Town reservoir was <br />constructed in 1978-79 along with the current <br />Norwood-Wrights Mesa watet distribution system. The <br />reservoir is entirely offfstream and has no natural <br />inflow. It was construct$d using a cut and fill <br />procedure. According to design drawings, the <br />original capacity of the reservoir was to be <br />10,000,000 gallons with water surface at elevation <br />7434 feet. Construction excavation encountered <br />bedrock, particularly at the southwest portion of <br />the reservoir. Bentoniteiclay was imported and <br />placed over exposed rock ~o help seal the reservoir <br />bottom. <br /> <br />Pipe Svstem. The reservoir has the following inlet <br />and outlet pipes: <br /> <br />1.) Inlet Pipe. This is part of the 10 inch pipe <br />which carries water f~om the headgate. It enters <br />the reservoir on the north end, near the bottom <br />and extends part way into the reservoir. <br /> <br />2.) Reservoir Outlet Pipe, A 10 inch outlet pipe <br />has been placed through the north embankment. <br />The outlet pipe is cOnnected to a flexible 6 <br />inch pipe in the rese~voir. The height of the <br />flexible 6 inch pipe qan be adjusted by walking <br />out on a catwalk (whiqh is in very poor <br />condition). The 6 inoh pipe has a screen which <br />frequently clogs withimoss. <br /> <br />3.) Overflow pipes or spillway. These consist of <br />two 10 inch pipes located 4 feet below the dam <br />crest (Assumed to be at elevation 7432 feet). <br />They are placed in the embankment along the west <br />side. <br /> <br />There are design drawings; but no -as-built' <br />drawings of the pipes; supplemental descriptions are <br />based upon observations by Town personnel. <br /> <br />Reaulatorv Problems. The spillway of the dam was <br />initially greater than 10 feet high above the toe at <br />the outlet, and therefore was included under the <br />jurisdiction of the Office of the state Engineer. <br />However, the reservoir was designed and constructed <br />without state Engineer re~iew or approval. <br /> <br />Several problems were noted during a 1982 inspection <br />by the State Engineer's dam inspector. These <br />included: 1) seepage areas on the berm. This was <br />deemed an unsafe condition, particularly considering <br />