USGS Water-Year Summary 2024

06808500 West Nishnabotna River at Randolph, IA

LOCATION - Lat 40°52'23.8", long 95°34'53.2" referenced to North American Datum of 1983, in NW 1/4 NE 1/4 NE 1/4 sec.17, T.70 N., R.41 W., Fremont County, IA, Hydrologic Unit 10240002, on right bank on upstream side of bridge on State Highway 184, 0.5 mi west of Randolph, 0.3 mi downstream from Deer Creek, 16.0 mi upstream from confluence with East Nishnabotna River, and 30.6 mi upstream from mouth of Nishnabotna River.

DRAINAGE AREA - 1,326 mi².

REVISIONS HISTORY - WSP 1440: Drainage area. WDR IA-74-1: 1973(M). WDR IA-76-1: 1975(P).

SURFACE-WATER RECORDS

PERIOD OF RECORD - Discharge records from June 1948 to current year.

GAGE - Water-stage recorder. Datum of gage is 933.78 ft above North American Vertical Datum of 1988. Prior to August 26, 1955, non-recording gage at same site and datum, with supplementary water-stage recorder operating above 8.4 ft gage height from June 30, 1949, to August 25, 1955.

REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS IA Water Science Center.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood in June 1947 reached a stage of about 24 ft, discharge not determined, from information by local residents.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water year 2016-2017.

PERIOD OF DAILY RECORD - WATER TEMPERATURE: Daily mean values, March 2016 to current year, records are fragmentary. TURBIDITY: March 2016 to current year, records are fragmentary. NITRATE + NITRITE: March 2016 to current year, records are fragmentary.