USGS Water-Year Summary 2023
06478600 EAST FORK VERMILLION RIVER NEAR PARKER, SD
LOCATION - Lat 43°26'43", long 97°06'34" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 NE 1/4 sec.33, T.100 N., R.53 W., Turner County, SD, Hydrologic Unit 10170102, on left bank at downstream end of county highway bridge, 4.1 mi upstream from the confluence with West Fork Vermillion River, 14.5 mi west of Tea, and 3.5 mi north-northeast of Parker.
DRAINAGE AREA - 924 mi² of which 478 mi² probably is noncontributing.
REVISIONS HISTORY - WDR SD-97-1: 1996 (daily discharges, June 2-5, 21), 1996 (M), WDR SD-10-1: Drainage area. Discharge for the period Oct. 18, 2018, to Oct. 29, 2019, was revised on Nov. 30, 2020, based on changes to the stage-discharge rating. 2022 Water Year Summary; discharges from Mar. 20 to July 6 were revised on Feb. 16, 2023.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1995 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,321 ft above NAVD88, from topographic map. Prior to conversion to NAVD88, datum was published as 1,320 ft above NGVD29, from topographic map.