USGS Water-Year Summary 2022
Northern Rocky Mountains Intermontane Basins aquifer systems
LOCATION - Lat 45°05'24", long 112°38'07" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 SW 1/4 sec.31, T.8 S., R.8 W., Beaverhead County, MT, Hydrologic Unit 10020002,
- Revised figures of daily mean depth to water level for water years 2013, 2014, and 2015; superseding those published in the reports for the respective water year, are available at:
WELL CHARACTERISTICS - Depth 217 ft. Upper casing diameter 5 in; top of first opening 207 ft, bottom of last opening 217 ft. Completed March 1993.
DATUM - Land-surface datum is 5,520.7 ft above National Geodetic Vertical Datum of 1929. Measuring point: top of steel casing, 2.2 ft above land-surface datum, Nov. 19, 1997 to Feb. 4, 2000; top of PVC cap, 2.0 ft above land-surface datum, Feb. 3, 2000 to Aug. 2, 2003; Top of steel casing, 1.85 ft above land-surface datum, Aug. 1, 2003 to present.
PERIOD OF RECORD - March 1993 to current year. USGS measurements and data from November 1997 to present.
GAGE - Routine measurement with e-tape or steel tape. Digital water-level recorder set to record every 4 hours from Nov. 1997 to Aug. 1, 2003. Pressure transducer and data logger set to record every hour from Aug. 1, 2003 to current year.
PERIOD OF DAILY RECORD - November 1997 to current year.
EXTREMES FOR PERIOD OF RECORD - Highest instantaneous water level, 138.72 ft, Oct. 23, 1995 (measured); lowest, 171.47 ft, March 28, 2021 (recorded)