USGS Water-Year Summary 2022
06821150 LITTLE PLATTE RIVER AT SMITHVILLE, MO
LOCATION - Lat 39°23'17", long 94°34'44" referenced to North American Datum of 1927, in NW 1/4 SW 1/4 sec.23, T.53 N., R.33 W., Clay County, MO, Hydrologic Unit 10240012, on left bank behind city equipment shelter on old bridge abutment, 500 ft upstream from town bridge in Smithville, 1,500 ft upstream from bridge on U.S. Highway 169, 0.5 mi downstream from Wilkerson Creek, 2.4 mi downstream from Smithville Lake, and at mile 11.1.
DRAINAGE AREA - 234 mi².
- WRD MO 1970: Drainage area. WDR MO-02-1: 2001(M).
PERIOD OF RECORD - Jun 1965 to current year. Occasional measurements 1942, 1943, 1946, 1962-65.
REVISED RECORDS - WRD MO 1970: Drainage area. WDR MO-02-1: 2001(M).
GAGE - Water-stage recorder. Datum of gage is 778.38 ft above North American Vertical Datum of 1988 (levels by the U.S. Army Corps of Engineers). Prior to Mar 23, 1966, nonrecording gage at site 1,500 ft downstream at same datum.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of 1947 reached a stage of 37.4 ft.
EXTREMES FOR PERIOD PRIOR TO REGULATION - Maximum discharge, 76,600 ft³/s, determined by slope-area measurement of peak flow, Jul 20, 1965, gage height 44.8 ft, from floodmark.