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<br />. <br /> <br />. <br /> <br />CAMP DRESSER & McKEE INC, <br /> <br />Dr. John Liou <br />Page 2 <br />August 10. 1981 <br /> <br />Templeton <br />Basin <br /> <br />- The Templeton Gap Basin is presently fully developed. <br />All basin characteristics at selected points were <br />obtained from the 1977. "North Shooks Run - Templeton <br />Gap Drainage Basin Study." by Lincoln DeVore. <br /> <br />~ Basin charact,eristics were obtained from the March. <br />1973. "Rockrimmon North Drainage Basin Hydrologic' <br />Study." by United Western Engineering. The 100-year <br />discharge for this study was determined by using a <br />one"hour storm 'and therefore the fl ows were re-deter- <br />mined by COM for future development conditions. All <br />other basin characteristics were evaluated and deter- <br />mined to be valid. The development in the Rockrimmon <br />Basin is reaching full development. with only the <br />most southern portion being undeveloped. The 100-year <br />discharge for existing conditions was determined by <br />re-calculating the curve numbers for the southern sub- <br />basins. <br /> <br />Rockrimmon <br />Basin <br /> <br />Presented below is a table of discharges at the outfall of each basin <br />comparing the 100-year flow for existing and future development conditions. <br /> <br />100-YEAR DISCHARGE <br /> <br /> Area(sq. mi.) (CFS) <br />Basin Future Conditions Existing Conditions <br />Douglas 6.22 4560 1"1'> 4040 <br /> .,,'l- <br />Mesa 2.18 2250 \0 2050 <br /> lo" 7 <br />Templeton 9.56 10.220 \0 \ 10,220 <br />Gap / <br /> ,p':> <br />Rockrimmon 1.90 2480 \ 2220 <br /> <br />The development in each of the basins is continuing at a constant rate <br />arid therefore will be near full development at the time of completion <br />of the Flood Insurance Study. It is COM's recommendation that future <br />development conditions be used for the Flood Insurance Study hydrologic <br />analysis for Colorado Springs. <br /> <br />, ',U0 <br /> <br />'i-' <br />".G <br /> <br />G>v <br />'" <br /> <br />'I s'ec~ <br />(!> ~ G-[J\f.-</ <br /> \ <br /> ~v. <br />" <br /> ... <br /> ~ <br /> 10 <br /> <br />" <br /> <br />_.{: 1"'-"'-' <br /> <br />'- \} <br />'Q, <br /> <br />OJ <br />U <br /> <br />~ 6 ~~ <br /> <br />\ <br />o 5" <br /> <br />O. A. <br /> <br />1'\ <br /> <br />r-- <br />'J"'" <br /> <br />% Change <br />11% <br />9% <br /> <br />0" <br />" <br /> <br />10% <br /> <br />.(\ <br />c)) , , <br />(0'" <br />