USGS Water-Year Summary for Site 473945096202401

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

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Water year 2025: 2025-10-01 to 2026-09-30

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USGS Water-Year Summary 2025

473945096202401 E01D-R 148N45W01CBDD L107 0000516287

Sand and gravel aquifers (glaciated regions)
Glacial Buried Sand and/or Gravel

LOCATION - Lat 47°39'44.94", long 96°20'24.26" referenced to North American Datum of 1983, in SE 1/4 NW 1/4 SW 1/4 sec.01, T.148 N., R.45 W., Polk County, MN, Hydrologic Unit 09020303,

REVISIONS HISTORY - On Dec. 01, 2011, it was discovered that an incorrect datum (stickup) measurement of 2.50 ft. was being used at the well. Upon further investigation, it was discovered that the cement pad heave distance had never been applied to the datum (stickup), which had been measured at the site since the transducer was originally installed in the well and recording data on Jun. 24, 2003 at 21:00 CDT. A more accurate datum (stickup) of 2.92 ft. was measured on Jun. 23, 2003 and remains the current datum (stickup) to-date. The entire water level record was recomputed with the accurate datum (stickup) from Jun. 23, 2003 to Dec. 01, 2011. All previously published water level data from Jun. 23, 2003 to Sept. 30, 2006 should be increased by 0.42 ft. to reflect the true datum (stickup) at that time. This period of data will not be republished. If you would like to get the get ahold of these data, please contact the Minnesota Water-Science Center.

GROUNDWATER RECORDS

WELL CHARACTERISTICS - Depth 171 ft. Upper casing diameter 2.12 in; top of first opening 168 ft, bottom of last opening 171 ft. The hole for well E01D was drilled with a 6.25-inch diameter, hydraulic rotary drill rig, on 15 September 1992 to a depth of 178 feet. The well is constructed of a 3-foot-long, 2.06-inch-diameter, flush-threaded schedule-40 stainless steel, 0.010-inch slotted screen attached to 168 feet of 2.12-inch-diameter, schedule-40 galvanized steel casing. The casing stickup was 2.92 feet above land surface on 24 June 2003. The open interval of the well is 168 - 171 feet below land surface and the total well depth is 171 feet. Note: This well is installed in a confined aquifer, is artesian, and flows. Water levels below land surface at this well are negative indicating that the water level is above the land surface.

DATUM - Land-surface datum is 1,074.78 ft above North American Vertical Datum of 1988. Measuring point: MP is center of Swaglok fitting. MP=2.63' stickup + 0.29' heave, 2.92 ft above land-surface datum, Jun. 24, 2003 to present.

PERIOD OF RECORD - Water levels were recorded hourly during Jun. 26, 2003 at 14:00 CDT to 20 Apr. 2016 at 10:00 CDT, except during the following periods:

Dec. 30, 2003 at 04:00 CST - Jan. 02, 2004 at 17:00 CST: due to station failure.
Sept. 07, 2004 at 22:00 CDT - Sept. 21, 2004 at 10:00 CDT: due to station failure.
Dec. 12, 2004 at 01:00 CST - Dec. 13, 2004 at 11:00 CST: due to station failure.
Dec. 15, 2004 at 23:00 CST - Apr. 26, 2005 at 13:00 CDT: due to vent tube freezing at fitting.
Dec. 23, 2005 at 19:00 CST - Jan. 09, 2006 at 12:00 CST: due to station failure.
Jan. 09, 2006 at 19:00 CST - Jan. 10, 2006 at 12:00 CST: due to station failure.
Jan. 18, 2006 at 13:00 CST - Jan. 20, 2006 at 10:00 CST: due to station failure.
Feb. 04, 2006 at 19:00 CST - Feb. 06, 2006 at 14:00 CS: due to station failure.
Feb. 07, 2006 at 13:00 CST - Apr. 28, 2006 at 12:00 CDT: due to vent tube freezing at fitting.
Dec. 20, 2006 at 19:00 CST - Apr. 12, 2011 at 18:00 CDT: due to vent tube freezing at fitting.
Apr. 29, 2011 at 10:00 CDT - May 02, 2011 at 04:00 CDT: due to station failure.
Apr. 06, 2015 at 18:00 CDT - Apr. 07, 2015 at 19:00 CDT: due to bad data during QW sampling.
Jun. 02, 2015 at 13:00 CDT - Jun. 03, 2015 at 09:00 CDT: due to bad data during QW sampling.
Jul. 21, 2015 at 15:00 CDT - Jul. 22, 2015 at 15:00 CDT: due to bad data during QW sampling.
Sept. 09, 2015 at 13:00 CDT - Sept. 10, 2015 at 16:00 CDT:due to bad data during QW sampling.
27 Feb. 2016 at 22:00 CST - 28 Feb. 2016 at 09:00 CST: due to unknown shift in water level.
Intermittent gaps: 12 Mar. 2016 at 19:00 CST - 20 Apr. 2016: due to failed transducer.

When possible, missing daily-average water levels (above) were accurately estimated based on the trend of the hydrograph during these periods. This station was discontinued on April 20, 2016. The last accurate recorded water level was on April 10, 2016 at 11:00 CDT.

GAGE - Water level is measured with a Design Analysis H-310 submersible pressure transducer accurate to 0.01 feet. The E01D transducer is wired to a Campbell Scientific, Inc. CR206 data logger, which is mounted at the E01S site, and records all hourly data for both sites. That data logger is housed in a 14-inch X 16-inch grey fiberglass shelter attached to the E01S well casing. That gage is powered by a 10W solar panel and is telemetered by radio to telephone telemetry.

The Design Analysis H-310 submersible pressure transducer began to intermittently fail on 12 Mar. 2016. Since data collection efforts for the Glacial Ridge study have ended, this failing transducer, all Swagelok fittings, and shelter were removed from the well on 20 Apr. 2016 and was discontinued.

COOPERATION - Well E01D is operated as part of a study to understand hydrologic changes resulting from wetland and prairie restoration and climate change. The station is operated by the U.S. Geological Survey in cooperation with the Red Lake Watershed District, the U.S. Fish and Wildlife Service, and The Nature Conservancy.

REMARKS - Water levels below land surface are accurate to 0.1 feet. Water levels above North American Vertical Datum of 1988 (sea level) are calculated by subtracting recorded water levels from the land surface elevation, which are accurate only to plus-or-minus 0.1 feet based on a differential GPS survey. Water-level differences are accurate to within 0.001 feet. Continuous water levels are only assumed accurate to +/- 0.1 feet and periodic water levels are assumed accurate to +/- 0.15 feet due to the difficultly of accurately measuring this flowing well with the pressure gage.

Measured groundwater levels are precise to two decimal places, not the 3 decimal places reported. Differences between subsequent groundwater levels are precise to 3 decimal places, however. Three-decimal place precision is useful at this site for hydrologic analyses such as estimation of groundwater recharge and evapotranspiration.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Hourly water temperatures are recorded from 26 June, 2003 at 14:00 CDT to April 20, 2016, except during the following periods:

Dec. 30, 2003 at 04:00 CST - Jan. 02, 2004 at 17:00 CST: due to station failure.
Sept. 07, 2004 at 22:00 CDT - Sept. 21, 2004 at 10:00 CDT: due to station failure.
Dec. 12, 2004 at 01:00 CST - Dec. 13, 2004 at 11:00 CST: due to station failure.
Dec. 15, 2004 at 23:00 CST - Apr. 26, 2005 at 13:00 CDT: due to vent tube freezing at fitting.
Dec. 23, 2005 at 19:00 CST - Jan. 09, 2006 at 12:00 CST: due to station failure.
Jan. 09, 2006 at 19:00 CST - Jan. 10, 2006 at 12:00 CST: due to station failure.
Jan. 18, 2006 at 13:00 CST - Jan. 20, 2006 at 10:00 CST: due to station failure.
Feb. 04, 2006 at 19:00 CST - Feb. 06, 2006 at 14:00 CS: due to station failure.
Feb. 07, 2006 at 13:00 CST - Apr. 28, 2006 at 12:00 CDT: due to vent tube freezing at fitting.
Dec. 20, 2006 at 19:00 CST - Apr. 12, 2011 at 18:00 CDT: due to vent tube freezing at fitting.
Apr. 29, 2011 at 10:00 CDT - May 02, 2011 at 04:00 CDT: due to station failure.
Apr. 06, 2015 at 18:00 CDT - Apr. 09, 2015 at 03:00 CDT: due to bad data during QW sampling
Jun. 02, 2015 at 13:00 CDT - Jun. 03, 2015 at 20:00 CDT: due to bad data during QW sampling
Jul. 21, 2015 at 15:00 CDT - Jul. 23, 2015 at 18:00 CDT: due to bad data during QW sampling
Sept. 09, 2015 at 13:00 CDT - Sept. 13, 2015 at 10:00 CDT: due to bad data during sampling
Intermittent gaps: 12 Mar. 2016 at 18:00 CST - 20 Apr. 2016: due to failing trans. thermistor

When possible, missing daily-average water temperatures (above) were accurately estimated based on the trend of the thermograph during these periods. This station was discontinued on April 20, 2016. The last accurate recorded water level was on April 2, 2016 at 1:00 CDT.

INSTRUMENTATION - Water temperature is measured with a Design Analysis H-310 submersible pressure transducer accurate to +/- 1.0°C. Temperature differences are accurate to 0.1°C.

The entire water temperature record is uncalibrated because it's too difficult and inaccurate to get a real water temperature measurement from this flowing well. Based on nearby, calibrated wells with the same type of transducer/thermistor deployed in them, the water temperature data at this well is likely low by < 1.0°C.

REMARKS - There is a difference in amplitude in the water thermograph between the end of 2006 and 2011. This suggests that transducer depth was shallower after 2006. Although no field notes could be found to confirm this suspicion, this is assumed to be the case.