USGS Water-Year Summary 2019
09021000 WILLOW CREEK BELOW WILLOW CREEK RESERVOIR, CO.
LOCATION - Lat 40°08'45", long 105°56'22" referenced to North American Datum of 1927, Grand County, CO, Hydrologic Unit 14010001, on left bank 788 ft ds of outlet to Willow Creek Reservoir, 0.3 miles east of County Road 40, 2.8 mi north of Highway 34, and 4.2 mi north of Granby.
DRAINAGE AREA - 134 mi².
PERIOD OF RECORD - August 1953 to September 1982, March 2018 to September 2018. Provisional data available upon request from Colorado Division of Water Resources for the years not published by the Geological Survey (Reference: WILWCRCO).
GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 8,023.64 ft above NGVD of 1929 (levels by U.S. Bureau of Reclamation).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 235 ft³/s, May 10, 2018, gage height, 4.24 ft.