USGS Water-Year Summary for Site 05474000

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	Available Parameters
	00060 Discharge(Mean)
	80154 Suspnd sedmnt conc(Mean)
	80155 Suspnd sedmnt disch(Mean)

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Water year 2022: 2021-10-01 to 2022-09-30

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USGS Water-Year Summary 2022

05474000 Skunk River at Augusta, IA

LOCATION - Lat 40°45'13", long 91°16'37.0" referenced to North American Datum of 1927, in NE 1/4 NE 1/4 NE 1/4 sec.26, T.69 N., R.4 W., Des Moines County, IA, Hydrologic Unit 07080107, on left bank on downstream side of bridge on County Highway X38 in Augusta, 2.0 mi upstream from Long Creek, and 10.4 mi upstream from mouth.

DRAINAGE AREA - 4,312 mi².

REVISIONS HISTORY - WSP 1308: 1915(M), 1919-1927(M), 1932-1934(M), 1936, 1937-1938(M), 1942(M). WSP 1438: Drainage area. WDR IA-71-1: 1966(M).

SURFACE-WATER RECORDS

PERIOD OF RECORD - Discharge records from September to November 1913, October 1914 to current year. Prior to June 1915, monthly mean discharge for some periods published in WSP 1308.

GAGE -

Water-stage recorder. Datum of gage is 521.24 ft above National Geodetic Vertical Datum of 1929. September 30 to November 15, 1913, non-recording gage at site 400 ft upstream at datum 0.73 ft higher; October 1, 1914, to January 14, 1935, non-recording gage at site 400 ft upstream at same datum.

Datum of gage is 521.076 ft above NAVD of 1988. (01/21/2022, GAC)

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

EXTREMES OUTSIDE PERIOD OF RECORD - Since at least 1851, no flood outside the period of record exceeded the April 23, 1973, stage of 27.05 ft, discharge 66,800 ft³/s. Flood of June 1, 1903, reached a stage of about 21.0 ft, discharge about 45,000 ft³/s, at datum in use in 1913.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1976 to current year.

PERIOD OF DAILY RECORD -
SPECIFIC CONDUCTANCE: Daily instantaneous values collected in conjunction with suspended-sediment samples, October 1975 to September 2010. Beginning October 2010, daily instantaneous values published in combined water-quality table.
WATER TEMPERATURE: Daily instantaneous values collected in conjunction with suspended-sediment samples, October 1975 to September 2010. Beginning October 2010, daily instantaneous values published in combined water-quality table.
SUSPENDED-SEDIMENT CONCENTRATION AND DISCHARGE: October 1975 to current year.

REMARKS - During periods of ice effect, samples are collected in open-water channel or through ice cover. Records of specific conductance from suspended-sediment samples are obtained at time of laboratory analysis.