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<br /> Table l. Summary of Discharges <br /> Drainage Area Peak Discharges (Cubic Feet per Second) <br /> Flooding Source and Location (Square Miles) 10-Year 50-Year 100-Year 500-Year <br /> Colorado River <br /> At Rifle 6,930 23,900 37,900 45,000 65,000 <br /> Helmer Gulch <br /> At Canyon Mouth 6.2 250 430 760 1,340 <br /> Ramsey Gulch <br /> A t Canyon Mouth 4.9 220 380 670 1,170 <br /> Rifle Creek <br /> Below Confluence With Hubbard <br /> Gulch 201 1,590 2,410 3,920 6,690 <br /> Below Confluence With Government <br />OJ Creek 193 1,490 2,230 3,610 6,150 <br /> Above Confluence With Government <br /> Creek 150 990 1,350 2,070 3,430 <br /> Rifle Creek splitflow <br /> At 30th Street N/A 455 702 1,227 2,283 <br /> Hubbard Gulch <br /> At Confluence with Rifle Creek 8 290 500 880 1,550 <br /> Government Creek <br /> At Confluence with Rifle Creek 43 760 1,330 2,340 4,110 <br />