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<br />11-6 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />. <br />. <br />. <br />I <br />. <br />. <br />I <br />I <br />I <br />. <br />I <br />. <br />I <br /> <br />point near Federal Blvd. is approximately elevation 5195 feet. The <br />total length of the Hidden Lake Planning Basin from the highest point <br />on the basin boundary to Clear Creek is approximately 4.5 miles. <br />The highest point on the boundary of the Bates Lake Planning Basin <br />is approximately elevation 5425 feet. The invert of Clear Creek near <br />Sheridan Blvd. where the Bates Lake basin flows (and Ralston Creek) <br />join Clear Creek is at elevation 5242 feet. The total length of the <br />Bates Lake Planning Basin is approximately 1.9 miles. <br />Geological influences upon the surface drainage conditions are <br />very muted. The only location within the two planning basins that <br />geological factors have affected the surface drainage is on the Clear <br />Creek alluvial terrace where large areas have been excavated to obtain <br />sand and gravel. These ponds do create a routing effect upon the <br />storm water runoff passing through these ponds. <br />The ponds located in the isolated sub-basins oft~ossess <br />sufficient surcharge storage capacity to retain the complete 100 year <br />storm runoff from the sub-basin. The surcharged storm water percolates <br />into the Clear Creek alluvial aquifer and thusly recharges the ground <br />water basin. <br />D. Present Land Use <br />The majority of the land in the upper portion of the Hidden Lake <br />Planning Basin is presently developed to residential use. There is <br />a large block of land on the north side of the basin, west of Sheridan <br />(within Westminster) that is currently undeveloped, but plans have <br />been submitted to Westminster for PUD type projects in this area. The <br />existing development is shown on Figure 11-3. <br />