USGS Water-Year Summary 2024
481357104475701 29N53E26CCAC01
LOCATION - Lat 48°13'57.33", long 104°47'57.27" referenced to North American Datum of 1983, in NH 1/4 SW 1/4 SW 1/4 sec.26, T.29 N., R.53 E., Roosevelt County, MT, Hydrologic Unit 10060006,
REVISIONS HISTORY - Discrete groundwater measurements made on Aug. 13, 2015, Nov. 17, 2015, Nov. 24, 2015, May 17, 2016, Nov. 7, 2017, Sept. 5, 2018, and Oct. 10, 2018, were removed on Feb. 25, 2022, based on a review of the data which determined these measurements to be unrepresentative of natural conditions and/or erroneous.
Groundwater levels for the period of Nov. 24, 2015 to Dec. 12, 2015, were removed on Feb. 25, 2022 based on a review which determined these data to be unrepresentative of natural conditions and erroneous.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 1,180 ft. Upper casing diameter 5 in; top of first opening 1,160 ft, bottom of last opening 1,180 ft.
DATUM - Land-surface datum is 2,256.04 ft above North American Vertical Datum of 1988. Measuring point: Top of casing, 1.7 ft above land-surface datum, Jul. 16, 2015 to Apr. 16, 2021; North side edge of 1/2 inch hole in plywood floor, 1.77 ft above land-surface datum, Apr. 16, 2021 to present.
PERIOD OF RECORD - Discrete measurements and continuous data; December 2015 to present.
GAGE - In-Situ, Inc. LevelTroll 500 (100 psig)
PERIOD OF DAILY RECORD - December 2015 to present.
EXTREMES FOR PERIOD OF RECORD - Highest water level, 237.55 ft below land-surface datum, June 22, 2021 (recorded); lowest, 240.87 ft below land-surface datum, Feb. 12, 2016 (recorded).