USGS Water-Year Summary 2021
09081000 ROARING FORK RIVER NEAR EMMA, CO
LOCATION - Lat 39°22'24", long 107°05'00" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 sec.11, T.8 S., R.87 W., Eagle County, CO, Hydrologic Unit 14010004, on left bank 10 ft upstream from bridge on Hooks Lane, 1.2 mi downstream from Sopris Creek, and 1.2 mi northwest of Emma.
DRAINAGE AREA - 859 mi².
- WDR-US-2011: Drainage area.
PERIOD OF RECORD - August 1908 to September 1909 (monthly discharge only, published in WSP 1313), March 1998 to current year.
GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 6,470 ft above NGVD of 1929, from topographic map. Prior to Mar. 1998, nonrecording gage at different datum.
PERIOD OF RECORD - April 2019 to current year (seasonal records only).
INSTRUMENTATION - Tipping-bucket rain gage with satellite telemetry. Elevation of gage is 6,470 ft above NGVD of 1929, from topographic map.
EXTREMES FOR PERIOD OF RECORD - (seasonal only) Maximum daily precipitation, 0.77 inches, May 11, 2020.