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EXHIBIT 7, ITEM 23, PART L <br />Wilson Storage Pond <br />Near the beginning of construction for the Collom area, a temporary water storage pond will be <br />built to store water needed for the construction of the Collom Haul Road and other related uses. <br />Water will be pumped from a Colowyo held water right on Wilson Creek (please see Map 1013) <br />up to the Wilson Storage pond through a pipe lying on the ground to fill the Wilson Storage <br />Pond. <br />To store this water, the Wilson Storage Pond will be built to hold approximately 17 acre feet. <br />This quantity is estimated to provide the estimated need for one week of construction operations. <br />The pond is located in the SE/4 of Section 16, T4N, R93 W. This partially subgrade structure is <br />temporary in nature and is expected to be in place for a 1 to 4 year time period. <br />The pond has been designed with 3H:1 V side slopes, a 30 foot wide embankment crest, and an <br />open channel emergency spillway 20 feet in width with 3H:1 V sideslopes. Total depth of the <br />pond is less than 10 feet. Exhibit 7-23, Figure L1 shows the location of the structure, cross- <br />sections, and other design information. <br />No surface water inflow is anticipated, so no SEDCAD modeling has been provided. <br />Exh. 7-23L-1 Revision Date: 3/3/17 <br />Revision No.: TR -108 <br />