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Water-Year Summary for Site 465652094394801

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

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
465652094394801 HT-115 UMN Hydrogeology Field Site 0000773075
Till
LOCATION - Lat 46°56'52.81", long 94°39'47.97" referenced to North American Datum of 1983, in N 1/4 NE 1/4 NE 1/4 sec.12, 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 27 Jul. 2017 at 14:11 CDT - 07 Aug. 2017 at 16:45 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 115.02 ft. Upper casing diameter 1.32 in; top of first opening 112.35 ft, bottom of last opening 114.83 ft. The hole for piezometer HT-115 was drilled with an 6.75-inch-diameter, rotosonic drill rig to a depth of 115.5 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 2.71 feet (1454.71 ft. NAVD88, +/- 0.01 ft.) above land surface when measured on 30 May 2017. The open interval of the piezometer is between 112.35 and 114.83 feet below land surface and the total well depth is 115.02 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 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, 2.71 ft above land-surface datum, May 30, 2017 to present. The measuring point is a black mark on the top of the white PVC 1.32-inch well casing, which was 2.71 feet above land surface on 30 May 2017. Elevation of the measuring point is 1454.71 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 01 June 2017 to 11 October 2018. Water levels were recorded every 1-minute from 18 July 2017 at 16:38 CDT to 07 August 2017 at 16:45 CDT. Water levels were recorded hourly from 07 August 2017 at 17:00 CDT to 11 October 2018 at 07:00 CDT, except during the following periods:

19 Jul. 2017 at 13:57 CDT to 07 Aug. 2017 at 16:45 CDT: deleted due to WLs being affected by aquifer test pumping.

05 Sept. 2017 at 17:00-17:00 CDT: due to transducer removal from well during well purging.

12 Sept. 2017 at 16:00 & 17:00 CDT: due to transducer removal from well and WL recovery during QW sampling.

06 May 2018 at 22:00 CDT to 07 May 2018 at 19:00 CDT: due to transducer not recording data for unknown reason.

18 Jul. 2018 at 15:59 CDT - 20 Jul. 2018 at 14:00 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 07:00 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 was operated (2017-2018) by the University of Minnesota as a monitoring well for the University of Minnesota Hydrogeology Field Site. The well was used as part of the Glacial Confining Beds Study during 30 May 2017 to 11 Oct. 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 115.02 ft. Upper casing diameter 1.32 in; top of first opening 112.35 ft, bottom of last opening 114.83 ft. The hole for piezometer HT-115 was drilled with an 6.75-inch-diameter, rotosonic drill rig to a depth of 115.5 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 2.71 feet (1454.71 ft. NAVD88, +/- 0.01 ft.) above land surface when measured on 30 May 2017. The open interval of the piezometer is between 112.35 and 114.83 feet below land surface and the total well depth is 115.02 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 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, 2.71 ft above land-surface datum, May 30, 2017 to present. The measuring point is a black mark on the top of the white PVC 1.32-inch well casing, which was 2.71 feet above land surface on 30 May 2017. Elevation of the measuring point is 1454.71 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 18 July 2017 at 16:38 CDT to 07 August 2017 at 16:45 CDT. Water temperatures were recorded hourly from 07 August 2017 at 17:00 CDT to 11 October 2018 at 07:00 CDT, except during the following periods:

18 Jul. 2017 at 16:40-17:30 CDT: due to transducer equilibration after deployment.

19 Jul. 2017 at 17:20-17:21 CDT: due to site visit.

20 Jul. 2017 at 09:56-10:05 CDT: due to site visit.

21 Jul. 2017 at 09:08-09:09 CDT: due to site visit.

24 Jul. 2017 at 12:52-13:03 CDT: due to site visit.

07 Aug. 2017 at 16:43-17:00 CDT: due to site visit.

05 Sept. 2017 at 15:00-18:00 CDT: due to transducer removal during purging.

12 Sept. 2017 at 16:00-18:00 CDT: due to transducer removal during QW sampling.

06 May 2018 at 22:00 CDT to 07 May 2018 at 19:00 CDT: due to transducer not recording data for unknown reason.

COOPERATION - This site was operated (2017-2018) by the University of Minnesota as a monitoring well for the University of Minnesota Hydrogeology Field Site. The well was used as part of the Glacial Confining Beds Study during 30 May 2017 to 11 Oct. 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 +/- 0.1°C. Temperature differences are accurate to 0.1°C.