USGS Water-Year Summary 2020
06404998 GRACE COOLIDGE CREEK NEAR GAME LODGE, NEAR CUSTER, SD
LOCATION - Lat 43°45'40", long 103°21'49" referenced to North American Datum of 1927, in SW 1/4 NE 1/4 sec.26, T.3 S., R.6 E., Custer County, SD, Hydrologic Unit 10120109, on right bank 0.3 mi downstream from bridge on U.S. Highway 16A, 0.9 mi east of Game Lodge, 1.5 mi southwest of junction of State Highway 36 and U.S. Highway 16A, and 11.5 mi east of Custer.
DRAINAGE AREA - 26.8 mi².
- WDR SD-88-1: 1988(M). WDR SD-10-1: Drainage area.
PERIOD OF RECORD - July 1945 to July 1947, October 1976 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 4,107.04 ft above NAVD of 1988. From July 17, 1945, to July 31, 1947, nonrecording gage at site 1,800 ft upstream at different datum. Site 06405000 operated June 1967 to June 13, 1976, at site 500 ft downstream at same datum.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of June 10, 1972, reached a stage of 10.35 ft, from floodmarks at site 06405000, 500 ft downstream from current location, discharge of 709 ft³/s from slope-area measurement of peak flow. Flood of June 15, 1976, reached a stage of 10.90 ft, from floodmarks at site 06405000, 500 ft downstream from current location, discharge of 980 ft³/s on basis of slope-area measurement of peak flow.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 1,030 ft³/s, from rating curve extended above 709 ft³/s, on basis of slope-area measurement of peak flow, Sept. 7, 1989, gage height, 10.84 ft, from floodmarks; minimum daily discharge, 0.00 ft³/s, June 5, 1977, no flow for some days in 1977, 1988, and 1989.