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<br />Table 3 <br />Cache La Poudre River <br />Mountain Area <br />Discharge-Probability Relationships <br /> <br />. <br /> <br />Station <br /> <br />Contributing <br />Drainage <br />Area <br />(sq. mi.) <br /> <br />10-Yr <br />(c.Ls.) <br /> <br />50-Yr <br />(c.Ls.) <br /> <br />Flood <br />100-Yr <br />(c.f.s.) <br /> <br />500-Yr <br />(c.Ls.) <br /> <br />U/s!/ from Hewlett Gulch & <br />FaHs Gulch 385 4,960 11,590 16,300 31,870 <br />D/'i'F from Hewlett Gulch & <br />Falls Gulch 409 5,170 12,280 17,320 36,220 <br />U/S from Hill Gulch 409 5,170 12,280 17,320 36,220 <br />D/S from Hill Gulch 415 5,220 12,460 17,580 36,820 <br />U/S from Confluence with <br />North F"rk 422 5,230 12,520 17,700 37,040 <br />Y U/S - Upstream <br />Y D/S - 1Jownstream <br /> <br />NORTH FORK CACHE LA POUDRE RIVER <br /> <br />Two storms were used to generate the North Fork Cache la Poudre <br /> <br /> <br />River discharges given in table 4. A storm over the 354-square-mile <br /> <br /> <br />drainage area upstream from Halligan Reservoir produced the greatest <br /> <br /> <br />discharges from Halligan Reservoir to upstream from Stonewall Creek. <br /> <br /> <br />Stonewall Creek enters the North Fork Cache la Poudre River from the <br /> <br /> <br />left about one-half mile upstream from Lone Pine Creek. Rabbit Creek, <br /> <br /> <br />also listed in table 4, enters che main river from the right about 1 <br /> <br /> <br />mile upstream from Lone Pine Creek. Downstream from Stonewall Creek to <br /> <br /> <br />the mouth of the North Fork Cache la Poudre River, a storm over the <br /> <br />entire 566-square-mile area of th~ North Fork Cache la Poudre River was <br /> <br /> <br />the most critical. A 30o-c.f.s. base flow was added to the North Fork <br /> <br /> <br />Cache la Poudre River discharges. <br /> <br />16 <br /> <br />. <br />