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Water-Year Summary for Site 465652094394802

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Available Parameters
00010 Temperature, water(Mean)  
62611 Elevation, GW, NAVD88(Mean)  
72019 Water level, depth LSD(Mean)  

Water year 2024: 2024-10-01 to 2025-09-30
 
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USGS Water-Year Summary 2024
465652094394802 HT-140 UMN Hydrogeology Field Site 0000773076
Till
LOCATION - Lat 46°56'52.79", long 94°39'47.84" referenced to North American Datum of 1983, in N 1/4 NE 1/4 NE 1/4 sec.13, T.140 N., R.32 W., Hubbard County, MN, Hydrologic Unit 07010102, The piezometer is located approximately 4.9 miles SE of Akeley, MN. The piezometer is located in an open area in the forest, between Williams Lake and Crystal Lake. The piezometer is located approximately 0.8 miles SW of the intersection of MN HWY 12 (Lower 10 Mile Lake Rd. NW) and 72nd Ave. NW.
REVISIONS HISTORY - On 01 Feb. 2019, it was determined that water levels (ft. BLS & ft. NAVD88) were inaccurate during 29 Jul. 2017 at 22:52 CDT - 07 Aug. 2017 at 15:54 CDT. Based on the same behavior in the 2018 aquifer test water level data, it was clear that the water levels were artificially high due to artificial recharge water seeping into the aquifer and underlying till layer. Water level data during this period where therefore deleted.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 140.44 ft. Upper casing diameter 1.32 in; top of first opening 137.77 ft, bottom of last opening 140.25 ft. The hole for piezometer HT-140 was drilled with an 6.75-inch-diameter, rotosonic drill rig to a depth of 140.5 feet. The piezometer is constructed of a 2.48-feet-long, 1.32-inch-diameter, schedule-40 PVC, 0.010-inch slotted Brady Campbell Mfg. Inc. well screen, attached with glued PVC couplings with length/s of 20.00 feet of 1.32-inch-diameter, schedule-40 PVC well casing. The piezometer casing measuring point (stickup) was 2.61 feet (1455.00 ft. NAVD88, +/- 0.01 ft.) above land surface when measured on 31 May 2017. The open interval of the piezometer is between 137.77 and 140.25 feet below land surface and the total well depth is 140.44 feet below land surface.

This piezometer is screened in a glacial till layer, which is the confining unit above a confined aquifer.
DATUM - Land-surface datum is 1,452.39 ft above North American Vertical Datum of 1988. Measuring point: Black mark on top of 1.25-inch diameter PVC well casing, not protection post, 2.61 ft above land-surface datum, May 31, 2017 to present. The measuring point is a black mark on the top of the white PVC 1.32-inch well casing, which was 2.61 feet above land surface on 31 May 2017. Elevation of the measuring point is 1455.00 plus-or-minus 0.01 feet above sea level, North American Vertical Datum of 1988, based on historical differential GPS data and an optical survey on 20 July 2017.
PERIOD OF RECORD -

Water levels were recorded periodically from 08 June 2017 to 11 October 2018.  Water levels were recorded every 1-minute from 18 July 2017 at 14:49 CDT to 07 August 2017 at 15:54 CDT. Water levels were recorded hourly from 05 September 2017 at 16:00 CDT to 17 July 2018 at 19:00 CDT. Water levels were recorded every 1-minute from 17 July 2018 at 19:53 CDT to 31 July 2018 at 18:14 CDT. Water levels were recorded hourly from 31 July 2018 at 19:00 CDT to 11 October 2018 at 08:00 CDT , except during the following periods:

19 Jul. 2017 at 16:50 CDT to 07 Aug. 2017 at 15:54 CDT: deleted due to WLs being affected by aquifer test pumping.

07 Aug. 2017 at 15:54 CDT to 12 Sept. 2017 at 08:00 CDT: due to transducer being used for slug tests and well purging. 

12 Sept. 2017 at 09:00 CDT to 21 Sept. 2017 at 17:00 CDT: due to transducer removal from well during well purging.

05 Oct. 2017 at 14:00 CDT to 06 Oct. 2017 at 18:00 CDT: due to transducer removal from well for communications issue.

18 Jul. 2018 at 15:58 CDT - 20 Jul. 2018 at 10:00 CDT: due to water level being affected by aquifer test at the site.

GAGE -

Continuous water level, water temperature, and battery voltage were measured with an OTT Orpheus Mini 0-10m pressure transducer. These data were recorded hourly by the same OTT Orpheus Mini pressure transducer, which had a data logger built into it. The data logger was housed inside of the 1.32-inch PVC well casing, which has an aluminum locking well cap on top the 6-inch black steel protection post. The gage was powered by 3 AA alkaline batteries that were inside of the data logger communications rod. Data were downloaded manually and no telemetry or phone line was wired into the gage.

The pressure transducer and data logger were removed from the well on 11 Oct. 2018 at 08:00 CDT. Data collection for the Confining Beds "phase 2" study have concluded and all data logging equipment have been removed from the sites.

COOPERATION - This site is operated (2017-2018) by the U.S. Geological Survey as a monitoring piezometer for the Glacial Confining Beds Study. The well was used as part of the Glacial Confining Beds Study during 31 May 2017 to 11 October 2018. The Confining Beds Study was a collaborative effort between the Environment and Natural Resources Trust Fund, Iowa State University, Minnesota Geological Survey, and the U.S. Geological Survey.
WATER-QUALITY RECORDS
WELL CHARACTERISTICS - Depth 140.44 ft. Upper casing diameter 1.32 in; top of first opening 137.77 ft, bottom of last opening 140.25 ft. The hole for piezometer HT-140 was drilled with an 6.75-inch-diameter, rotosonic drill rig to a depth of 140.5 feet. The piezometer is constructed of a 2.48-feet-long, 1.32-inch-diameter, schedule-40 PVC, 0.010-inch slotted Brady Campbell Mfg. Inc. well screen, attached with glued PVC couplings with length/s of 20.00 feet of 1.32-inch-diameter, schedule-40 PVC well casing. The piezometer casing measuring point (stickup) was 2.61 feet (1455.00 ft. NAVD88, +/- 0.01 ft.) above land surface when measured on 31 May 2017. The open interval of the piezometer is between 137.77 and 140.25 feet below land surface and the total well depth is 140.44 feet below land surface.

This piezometer is screened in a glacial till layer, which is the confining unit above a confined aquifer.
DATUM - Land-surface datum is 1,452.39 ft above North American Vertical Datum of 1988. Measuring point: Black mark on top of 1.25-inch diameter PVC well casing, not protection post, 2.61 ft above land-surface datum, May 31, 2017 to present. The measuring point is a black mark on the top of the white PVC 1.32-inch well casing, which was 2.61 feet above land surface on 31 May 2017. Elevation of the measuring point is 1455.00 plus-or-minus 0.01 feet above sea level, North American Vertical Datum of 1988, based on historical differential GPS data and an optical survey on 20 July 2017.
PERIOD OF RECORD -

Water temperatures were recorded every 1-minute from 11 July 2017 at 14:00 CDT to 07 August 2017 at 15:54 CDT. Water temperatures were recorded hourly from 07 August 2017 at 16:00 CDT to 28 August 2017 at 11:00 CDT. Water temperatures were recorded every 10-minutes from 28 August 2017 at 12:20 CDT to 05 September 2017 at 15:10 CDT. Water temperatures were recorded hourly from 05 September 2017 at 16:00 CDT to 17 July 2018 at 19:00 CDT. Water temperatures were recorded every 1-minute from 17 July 2018 at 19:53 CDT to 31 July 2018 at 18:14 CDT. Water temperatures were recorded hourly from 31 July 2018 at 19:00 CDT to 11 October 2018 at 08:00 CDT , except during the following periods:

18 Jul. 2017 at 14:00-14:50 CDT: due to transducer equilibration after deployment.

18 Jul. 2017 at 14:51-15:01 CDT: due to site visit.

19 Jul. 2017 at 17:28-17:30 CDT: due to site visit.

20 Jul. 2017 at 09:55 CDT: due to site visit.

21 Jul. 2017 at 08:55-08:57 CDT: due to site visit.

24 Jul. 2017 at 12:47-12:54 CDT: due to site visit.

07 Aug. 2017 at 15:51-15:55 CDT: due to site visit.

28 Aug. 2017 at 12:00-12:10 CDT: due to site visit.

05 Sept. 2017 at 18:00 CDT to 07 Sept. 2017 at 17:00 CDT: due to transducer hanging air after well purging.

12 Sept. 2017 at 18:00 CDT to 13 Sept. 2017 at 02:00 CDT: due to site visit.

12 Sept. 2017 at 14:00 CDT to 14 Sept. 2017 at 09:00 CDT: due to transducer hanging air after well QW sampling.
COOPERATION - This site is operated (2017-2018) by the U.S. Geological Survey as a monitoring piezometer for the Glacial Confining Beds Study. The well was used as part of the Glacial Confining Beds Study during 31 May 2017 to 11 October 2018. The Confining Beds Study was a collaborative effort between the Environment and Natural Resources Trust Fund, Iowa State University, Minnesota Geological Survey, and the U.S. Geological Survey.
INSTRUMENTATION - Water temperature are measured with an OTT Orpheus Mini submersible pressure transducer accurate to +/- 0.3°C. Temperature differences are accurate to 0.1°C.