USGS Water-Year Summary 2021
09147000 DALLAS CREEK NEAR RIDGWAY, CO
LOCATION - Lat 38°10'40", long 107°45'28" referenced to North American Datum of 1927, in sec.04, T.45 N., R.8 W., Ouray County, CO, Hydrologic Unit 14020006, on right bank 20 ft downstream from county road bridge, 1.5 mi upstream from mouth, and 1.5 mi northwest of Ridgway.
DRAINAGE AREA - 97.2 mi².
- WSP 1924: 1960. WDR CO-88-2: Drainage area.
PERIOD OF RECORD - March 1922 to October 1927, October 1955 to September 1971, October 1979 to current year.
GAGE - Water stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 6,980 ft above NGVD of 1929, from topographic map. Mar. 1, 1922 to Oct. 31, 1927, nonrecording gage at different datum.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 3,960 ft³/s, July 31, 1999, on basis of slope-area measurement of peak flow, gage height, 8.42 ft, from high-water mark.
PERIOD OF RECORD - May 2005 to September 2015. September 2018 to current year (seasonal records only).
INSTRUMENTATION - Tipping-bucket rain gage with satellite telemetry. Elevation of gage is 6,980 ft above NGVD of 1929, from topographic map.
EXTREMES FOR PERIOD OF RECORD - (seasonal only) Maximum daily precipitation, 1.65 inches, July 17, 2020.