USGS Water-Year Summary 2018
06907700 BLACKWATER RIVER AT VALLEY CITY, MO
LOCATION - Lat 38°52'12", long 93°37'19" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 sec.13, T.47 N., R.25 W., Johnson County, MO, Hydrologic Unit 10300104, on left downstream end of bridge abutment county highway E, 0.5 mi upstream from Blackjack Creek, 0.5 mi northwest of Valley City, 1 mi downstream from Clear Creek, 8 mi northwest of Knob Noster, 9 mi northeast of Warrensburg.
DRAINAGE AREA - 547 mi².
PERIOD OF RECORD - Oct 1958 to Sep 1973, Jun 2007 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is unknown. Oct 1958 to Sep 1973, at same site, datum 650.23 ft National Geodetic Vertical Datum of 1929.