USGS Water-Year Summary 2020
09047700 KEYSTONE GULCH NEAR DILLON, CO
LOCATION - Lat 39°35'40", long 105°58'19" referenced to North American Datum of 1927, in NE 1/4 NE 1/4 sec.26, T.5 S., R.77 W., Summit County, CO, Hydrologic Unit 14010002, on right bank 0.7 mi upstream from confluence with Snake River, about 1.2 mi southwest of Keystone, and 4.7 mi southeast of Dillon.
DRAINAGE AREA - 9.14 mi².
- WDR-US-2011: Drainage area.
PERIOD OF RECORD - October 1957 to current year.
GAGE - Water-stage recorder with satellite telemetry and crest-stage gage. Elevation of gage is 9,350 ft above NGVD of 1929, from topographic map.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 311 ft³/s, June 17, 1995, from rating curve extended above 65 ft³/s, gage height, 3.47 ft.