USGS Water-Year Summary 2021
09015000 COLORADO RIVER BL SHADOW MOUNTAIN RESERVOIR, CO
LOCATION - Lat 40°12'18.70", long 105°50'15.22" referenced to North American Datum of 1983, in sec.19, T.3 N., R.75 W., Grand County, CO, Hydrologic Unit 14010001, on right bank 1,400 feet downstream of the the outlet of Shadow Mountain Reservoir, 2,070 ft east of the intersection of county roads 66 and 666, 1.2 mi east of U.S. Highway 34, and 3.3 mi southwest of the town of Grand Lake.
DRAINAGE AREA - 190 mi².
PERIOD OF RECORD - October 1947 to September 1959, October 2014 to current year. Prior to October 1950, monthly discharge only, published in WSP 1313. Prior to September 1959, monthly discharge only, published in WSP 1733. Prior to October 1950, published as "below Shadow Mountain Dam."
GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 7,790 ft above NGVD of 1929, from topographic map.