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• POND 007 AS BUILT <br />Pond 007 is a totally incised pond and is designed to safely handle the runoff and <br />sediment load from a 10year-24hour and 25year-24hour precipitation event. Pond <br />007's watershed and the worse case hydrologic scenario land use is shown in Exhibit <br />2.05.3(3)-1. As can be seen on Exhibit 2.05.3(3)-1, the watershed includes all of the <br />original Pond 007's watershed plus the adjoining land tracts of Mr. Garvey, and Mr. <br />Burbridge to the west and Mr. Benson to the northwest. The original dam, primary <br />spillway, and emergency spillway were retained and used. <br />WFC has reconstructing 5th Road through the middle of the present Pond 007. 5th <br />Road in turn, acts like a baffle structure within Pond 007 and creates a longer path for <br />the inflow water to travel before it exits the pond through the 18 inch weep hole in the <br />primary spillway. A longer flow path gives any sediment ladden water the necessary <br />time to drop its load before being discharged through the primary spillway. The water <br />from both sides of 5th Road will be allowed to pass back and forth from the north side <br />to the south side via Culvert C-113A and C-1136. C-113A and C-1136 will be outlet <br />controlled, 42 and 48 inch by 120 foot CMP respectfully, and were designed to pass a <br />25year - 24 hour event. Attachment 2.05.3(3)-3 contains the design of C-113A and C- <br />113B. <br />Water quality being discharged to Calamity Draw has met effluent levels set by the <br />Colorado Department of Health in WFC's NPDES permit since final construction. The <br />As-Build SEDCAD runs for the 10year and 25 year - 24 hour events are in the following <br />Attachments to verifies the actual results. Pond 007 water level will be allowed to rise <br />up to and flow through an 18 inch weep hole that was created at the base of the <br />primeary outlet riser. This 18 inch weephole is in place and is incorporated in the <br />SEDCAD mode( of Pond 007. <br />As required by the State Engineer, Pond 007 must have the ability to retain 5.45 acre <br />feet of water. This water will be retained for possible use if the downstream water rights <br />are impacted. If a water call is issued, WFC will be required to pump this water out of <br />the pond and into Calamity Draw using a mobile pump system. <br />• <br />(REVISED 12700) Attachment 2.05.3(3)-7- 7 <br />