USGS Water-Year Summary 2023
06923950 NIANGUA RIVER AT TUNNEL DAM NEAR MACKS CREEK, MO
LOCATION - Lat 37°56'13.0", long 92°51'04.9" referenced to North American Datum of 1983, in SE 1/4 SW 1/4 SW 1/4 sec.19, T.37 N., R.17 W., Camden County, MO, Hydrologic Unit 10290110, at left end of concrete structure on top of Tunnel Dam, 6.5 mi southeast of Macks Creek.
DRAINAGE AREA - 598 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - Sep 1995 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 692.07 ft above North American Vertical Datum of 1988.