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. I dam (Leyden, WD 7) have been temporarily <br />set aside pending design of an altemative to <br />retain the dam as a flood control structure. Staff <br />continues to perform design review activities as <br />time peomits. <br />In earfy May, steady and cantinued rainfaA, nine <br />inches sn ten days, created flood condition.s that <br />eventually resulted in the failure of a non- <br />jurisdic$ional dam on Crow Creek near <br />Briggsda(e. The tributary drainage basin for this <br />dam extended into the mountains west of <br />Cheyenne, Wyoming. <br />Construction of a stability beRn for Woodland <br />Park Dam was completed, and the existing <br />storage restriction removed to allow the <br />resenroir to fill. Prior to achieving a full storage <br />condifiion, seepage appeared on the s@ope of <br />the new benn. Increased monitoring and <br />evaluation of this condition has continued whiie <br />the lake has been kept at a lowered eievation. <br />At Elder Dam, water district 3, sinkholes <br />developed on either side of the outlet conduit. <br />Investigations found larger cavities alang the <br />outlet conduit The owners are planning to <br />replace the outlet for Elder, and other dams <br />which were constructed in the same time frame <br />using similar techniques. <br />-- <br />'??, <br />In response to recommendations deve(oped <br />through a legislative audit, dam safety <br />personnel have discontinued inspections of <br />dams owned by the Corps of Engineers, the US <br />3 <br />Sinkho/e As Exposed Atter Truck Drove Over It <br />Inspection of Sinkhole AJter Opened Up Bv Backhoe