USGS Water-Year Summary 2023
471729114052101 18N20W25BDCD01
Glacial Colluvium
LOCATION - Lat 47°17'29", long 114°05'21" referenced to North American Datum of 1983, in SW 1/4 SE 1/4 NW 1/4 sec.25, T.18 N., R.20 W., Lake County, MT, Hydrologic Unit 17010212,
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 13.5 ft. Upper casing diameter 2 in; top of first opening undefined, bottom of last opening undefined.
DATUM - Land-surface datum is 3,077 ft above North American Vertical Datum of 1988. Measuring point: Top of PVC casing, 1.85 ft above land-surface datum, Apr. 18, 2014 to present.
PERIOD OF RECORD - April 2014 to present .
GAGE - Routine measurement with calibrated e-tape. Pressure transducer with data logger set to record every hour.
PERIOD OF DAILY RECORD - April 2015 to present (seasonal records).
EXTREMES FOR PERIOD OF RECORD - Highest recorded instantaneous water level, 0.78 ft below land-surface datum; August 15 & 16, 2017; lowest instantaneous recorded, dry (greater than 13.5 ft below land-surface datum), May 4 to July 11, 2016.