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Loveland) were provided by the u.s. Army Corps of Eng'neers in their Flood Plain Information report in December 1971 (Refe ence 11). These elevations were modified by hand calculations were required due to channel modifications and new construction. Cross sections for Buckhorn Creek and Redstone Creek topographic maps at a scale of 1:2400 with a contour 'nterval of 2 feet (Reference 23). Bridges were measured to determ'ne size and structural geometry. Roughness coefficients were est'mated by field inspection. The channel value for both streams was 0.035, and the overbank values ranged from 0.045 to 0.100. Water-su face elevations were computed using the u.s. Army Corps of Engineers EC-2 computer program (Reference 22). Cross section data for Box Elder Creek were taken fro topographic maps at a scale of 1:2400 with a contour interval of 2 feet (Refer- ence 24). Bridges and culverts were measured to obta'n elevation data and structural geometry. Roughness coefficients ere estimated by field inspection. The channel value used in this eport was 0.035, and the overbank values ranged from 0.030 to 0.040. Water- surface elevations were computed using the u.s. Army orps of Engineers HEC-2 computer program (Reference 22). Cross sections on Dry Creek were taken from topograph'c maps at a scale of 1:6000 with a contour interval of 4 feet (Re erence 25), and topographic maps at a scale of 1:2400 with a cont r interval of 2 feet (Reference 26). Roughness coefficients were es imated by field inspection. Channel values ranged from 0.03 to 0.06, and overbank values ranged from 0.03 to 0.06. Water-surfa e profiles were computed using the u.s. Army Corps of Engineers H C-2 computer program (Reference 22). Cross section data for Fish Creek and Fall River were topographic maps at a scale of 1:1200 with a contour i feet (Reference 27) and were supplemented with field-s sections. Roughness coefficients were estimated by fi The channel value was 0.04, and the overbank values ra to 0.08. Water-surface profiles were computed using t Corps of Engineers HEC-2 computer program (Reference 2 aken from terval of 2 rveyed cross ld inspection. ged from 0.03 e u.s. Army ) . Cross section for the Cache La Poudre River were field ,surveyed by the u.s. Army Corps of Engineers, Omaha District (Refe ence 5). Roughness coefficients were estimated by field inspect'on. Channel values ranged from 0.035 to 0.045, and overbank values ranged from 0.045 to 0.080. Flood elevations for the 10-, 50-, and 100-year floods La Poudre River were computed by the u.s. Army Corps 0 Omaha District (Reference 5). Water-surface elevation year flood were estimated based on rating curves prepa cross section using the u.s. Army Corps of Engineers i 16 on the Cache Engineers, for the 500- ed for each formation. ~