USGS Water-Year Summary for Site 05438283

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	00060 Discharge(Mean)

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Water year 2024: 2023-10-01 to 2024-09-30

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USGS Water-Year Summary 2024

05438283 PISCASAW CREEK NEAR WALWORTH, WI

LOCATION - Lat 42°31'18", long 88°39'39" referenced to North American Datum of 1983, in NE 1/4 NE 1/4 sec.25, T.1 N., R.15 E., Walworth County, WI, Hydrologic Unit 07090006, on right bank 0.9 mi upstream from County Trunk Highway B bridge, 3.2 mi southwest of Walworth.

DRAINAGE AREA - 9.58 mi².

REVISIONS HISTORY - The peak Gage height and Discharge were revised for 2009 after discovering that the 2008 peak had been incorrectly copied into 2009 causing 2008 and 2009 to report the same peak date and values. Did not change any other values, the instantaneous timeseries were not erroneous.

SURFACE-WATER RECORDS

PERIOD OF RECORD - September 1992 to current year.

GAGE -

Water-stage recorder and crest-stage gage. Elevation of gage is 928.39 ft above NAVD of 1988. Levels provided by Strand Associates, Inc.

The datum of the gage is listed as 928.39 ft. above NAVD of 1988, levels provided by Strand Associates, Inc. No documentation could be found for this elevation. Datum was verified with a RTN GNSS survey on 4/14/2023.

The GNSS survey found the datum to be 928.29 ft above NAVD of 1988 datum. The elevation was determined by a Real-Time Network survey using the statewide Global Navigation Satellite System (GNSS) reference station network, called the Wisconsin Continuously Operating Reference Stations (WISCORS) Network. The survey was done on 5/11/2023 by USGS personnel using a Topcon Hyper VR rover in combination with the FC5000 field tablet. Reference Frame NAD_83 (2011) (EPOCH:2010.000), GEOID18.

GWSI Method Code: GNSS4
GWSI Altitude Accuracy: 0.04 ft

The documented elevation of 928.39 ft. is only 0.10 ft. different from the GNSS elevation of 928.29 ft, the original datum elevation was kept as the published datum.

Orifice location moved 80 ft upstream on 8/3/23, gage datum remains unchanged.

REMARKS - Gage-height telemeter at station. Records are considered good except for estimated discharges, which are poor, and other periods as noted. For records status prior to October 1, 2013, see remarks printed in annual water-data reports.