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<br /> Table 1. Summary of Discharges <br /> Drainage Area Peak Discharges (cfs) <br /> Flooding SOurce and Location (Square Miles) 10-Year 50-Year 100-Year 500-Year <br /> Plum Creek <br /> Downstream Limit of <br /> Detailed Study 319 14,130 28,520 38,300 57,410 <br /> At Titan Road 314 14,190 28,730 38,590 61,850 <br /> At West Louviers Avenue 302 14,150 28,800 38,710 65,710 <br /> At Confluence With Indian <br /> Creek 300 14,430 29,130 39.100 66,300 <br /> At UMilIaed Road (Station 37,400) 278 13,970 28,350 38,120 64,930 <br /> At West Rio Grande Avenue 273 14,710 28,750 38, 720 66,220 <br /> At Confluence With West Plum <br /> Creek 266 14,480 29,260 39,340 67,090 <br />N <br />0 East P1l111l Creek <br /> At Cross Section E 129 6,020 12,460 16,650 27,730 <br /> At Confluence With Hangmans <br /> Gulch 106.1 5,780 11,910 15.950 26,600 <br /> At Interstate Highway 25 Bridge, <br /> In Castle Rock 85.6 5,740 11,830 15,840 26,430 <br /> At Upstream Corporate Limi ts <br /> of Castle Rock 84.7 5,190 10,600 14,120 23,640 <br /> At Interstate Highway 25, <br /> in Larkspur 61.6 5,300 11.000 14 , 800 24,800 <br /> At County Road 18 61.2 5,340 11.100 14 , 900 25,000 <br /> At Perry Park Avenue 57.2 5,670 11 , 600 15,400 25,600 <br /> At Spruce Mountain Road 29.1 3,100 6,480 8,660 14,550 <br />