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<br />. 7) Raw Water Storage <br /> <br />As mentioned earlier, the reservoir designated in the Planning Document as . <br />"Crow Lane #1" with a 35' high dam was the preferred Alternate chosen by <br />the Board of the Pinewood Springs Water District. It is located in the NE <br />1/4 of the NE 1/4 of Section 32-Township4N-Range 71W, and between <br />Highway 36 and Crow Lane, as shown in Exhibit "C", whic~ also indicates <br />the other locations of the other Alternate reservoir sites 'considered in the <br />Planning Document. <br /> <br />It will be created by a 35' high dam constructed across a natural swale at <br />that location, with plans to use native on site material. It will have a storage. <br />capacity of approximately 51 acre/feet, and will "receive as its primary <br />source of supply raw water from the Little Thompson River via the trans- <br />mission system described above. A considerably smaller source will be the <br />run-off it receives' from a natural drainage basin directly above the site, hav- <br />ing a surface area of approxiinately 1/2 of a square mile. . <br /> <br />i'..(~::;:" <br />'- "'\' <br /> <br />Because of its height, it .is considered a "Jurisdictional" dam, andits design <br />and construction- must be done in accordance with the requirements of the <br />State Engineer's office. It will include an outlet works, drain, and emer- <br />gency spillway.' , <br /> <br />8) Hvdraulic Calculations' <br /> <br />.Raw Water TransmissionSvstem <br /> <br />From a field survey done by District personnel at the site of the water treat- <br />ment plant, it was estimated that the low water level in the raw water pump <br />station would be atappro~ately elevation 6400, and the proposed operat- <br />. ing level of the Crow Lane # 1 reservoir would be at approximately eleva- <br />tion 6600, resulting in a static lift of200'. <br /> <br />. Using a head loss of 6.6' per 1000 foot of 4" PVC pipe @IOOgpm (C-:-140) <br />for a length of 6000' results in a total loss of 39.6', or say 50'. (to cover <br />additional miscellaneous internal station losses), and when added to the <br />static lift of200'means that a typical pump should be able to deliver: <br /> <br />. <br /> <br />-100 gpm against a Total Dvnamic Head (mID of250' <br /> <br />34 <br />