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<br />. <br /> <br />. <br /> <br />. <br /> <br />RUNOFF ESTIMATES <br />Runoff estimates were obtained for various streams using indirect flow measurement techniques, <br />Channel cross-sections were obtained by using a hand level, survey rod, and a 100' tape, High <br />water marks were good to excellent in all locations, Normal depth calculations were done using <br />Manning's equation, Channel slopes were obtained from USGS Quad maps, and "n" values <br />were estimated in the field, A range of flow values is presented to account for various <br />uncertainties in estimating the peak flows. <br /> <br /> Est. Peak flow Est. Flow <br />Location (cfs) Frequencv* <br />N, Fork Frenchman Creek near Hwy 6, just west of 250 to 350 N/A <br />Paoli <br />N, Fork Frenchman Creek dls ofRd 37,just west of 1,600 to 2,000 lO-year <br />Holyoke <br />S, Fork Frenchman Creek near Rd 33, 3 mi west of 1,800 to 2,200 25-year <br />Holvoke <br />S, Fork Frenchman Creek near Rd 35, 2 mi west of 1,800 to 2,200 25- year <br />Holvoke <br />Frenchman Creek dls of Hwy 6 in Holyoke 3,600 to 4,000 25-year <br />Frenchman Creek at golf course in Holyoke 3,600 to 4,000 25-year <br />Left bank trib to Frenchman Creek 1,5 mi northeast of 600 to 800 50-100-year <br />Holyoke, near Hwy 23 and Rd 41 <br />Left Bank trib to Wildhorse Creek at Amherst, near 1,800 to 2,200 lOO-year <br />Hwv 23 and Rd 51. <br /> <br />* Based on hydrology values published in "Floodplain Information Report, Frenchman <br />Creek, Holyoke, Colorado" (June 1980) where available, Other frequency estimates based on <br />regional regression equations for the Republican River basin, <br /> <br />2 <br />