Laserfiche WebLink
<br />I <br />I <br />I <br />I <br />. <br />. <br />I <br />I <br />I <br />I <br />. <br />I <br />I <br />I <br />. <br />I <br />. <br />. <br />I <br /> <br />11-5 <br /> <br />the lowest point in the dam, the whole lake will revert into nothing <br />but a mud flat. The lake is only six feet deep". Copies of these <br />two letters are included in Appendix A of the Phase A report. <br />In conversation with several of the homeowners along the south <br />shore area, the Hydro-Triad, Ltd. staff has determined the normal <br />water surface of Hidden Lake is maintained at a level approximately <br />one foot below the crest of the spillway. The exact mechanism or <br />operation of the outlet to maintain this water surface level has not <br />been established, but observations at various times during the course <br />of the study have verified this nominal water surface level. The <br />filling of the outlet pipe with concrete during the winter months of <br />1974-1975 may affect the regulation of the water surface. <br />Bates Lake was an irrigation storage reservoir prior to urbani- <br />zation in the area. The City of Arvada acquired the land on which th~ <br />lake was located and has modified the lake such that normally the area <br />can be used as a park. The pond configuration has been maintained <br />within the park and the pond coupled with the inlet and outlet <br />facilities, as constructed, operates quite well as a storm water <br />detention facility. <br />C. Topographic and Geologic Features <br />The relief in the upper portion of the Hidden Lake Planning Basin <br />is relatively severe with slopes ranging from 10 to 15 percent down <br />to 0.5 percent near Sheridan Blvd. The highest point is approximately <br />elevation 5640 feet. The nominal water surface for Hidden Lake is <br />elevation 5280 feet and the invert of Clear Creek at the discharge <br />