USGS Water-Year Summary 2023
423717089120901 RO-02/11E/21-1180
Cambrian-Ordovician aquifer system
St. Peter Sandstone
LOCATION - Lat 42°37'16.57", long 89°12'08.92" referenced to North American Datum of 1983, in NE 1/4 SW 1/4 sec.21, T.2 N., R.11 E., Rock County, WI, Hydrologic Unit 07090002,
GROUNDWATER RECORDS
DATUM - Land-surface datum is 841.1 ft above North American Vertical Datum of 1988. Measuring point: Top of casing, 2.11 ft above land-surface datum, Dec. 21, 2021 to Apr. 22, 2022; Top of casing cap, 2.13 ft above land-surface datum, Apr. 22, 2022 to present.