USGS Water-Year Summary 2023
07021020 Castor River at Greenbrier, MO
LOCATION - Lat 37°06'31.8", long 90°01'30.0" referenced to North American Datum of 1983, in SE 1/4 SE 1/4 NW 1/4 sec.11, T.28 N., R.9 E., Bollinger County, MO, Hydrologic Unit 07140107, and 6 miles downstream from base gage at Zalma.
DRAINAGE AREA - unknown
SURFACE-WATER RECORDS
PERIOD OF RECORD - Jan 2001 to Oct 2018.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 343.44 ft above North American Vertical Datum of 1988.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Nov 1999 to current year.