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Water-Year Summary for Site 473425095052602

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Available Parameters
00010 Temperature, water(Mean)  
00045 Precipitation(Max.,Sum) [not accurate when freezing]  
62611 Elevation, GW, NAVD88(Mean)  
72019 Water level, depth LSD(Med.,Max.,Min.,Mean)  

Water year 2019: 2019-10-01 to 2020-09-30
 

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USGS Water-Year Summary 2019
473425095052602 604B Bemidji Toxcis Research Site
Sand and gravel aquifers (glaciated regions)
Glacial Surficial Sand and/or Gravel
LOCATION - Lat 47°34'24.97", long 95°05'27.15" referenced to North American Datum of 1983, in NE 1/4 SE 1/4 SW 1/4 sec.02, T.147 N., R.35 W., Beltrami County, MN, Hydrologic Unit 07010101, 12 miles NW of Bemidji, Minnesota, 2.3 miles SE of Pinewood, Minnesota. The land surface at the site is 1419.76 plus-or-minus 0.01 feet above sea level, North American Vertical Datum of 1988.
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 29.71 ft. Upper casing diameter 2.04 in; top of first opening 27.01 ft, bottom of last opening 27.51 ft. The hole for well 604B was drilled on 29 May 1987 with an 7.25-inch-diameter, hollow stem auger drill rig to an unknown depth. The well is constructed of a 0.50-feet-long, 2.04-inch-diameter, schedule-40 PVC, 0.010-inch slotted well screen, attached to length/s of 10.00 feet of 2.04-inch-diameter, schedule-40 PVC well casing. The well casing measuring point (stickup) was 2.05 feet (1414.86 ft. NAVD88, +/- 0.01 ft.) above land surface when measured on 29 May 1987. The open interval of the well is between 27.01 and 27.51 feet below land surface and the total well depth is 29.71 feet below land surface.
DATUM - Land-surface datum is 1,412.81 ft above North American Vertical Datum of 1988. Measuring point: MP assumed to be the top of casing, not protection post, 2.05 ft above land-surface datum, May 29, 1987 to present. The measuring point is a black mark on the 2-inch PVC well casing, which is visible through the floor of the aluminum shelter that is mounted on top of well 604B, and was 2.05 feet above land surface on 29 May 1987. Elevation of the measuring point is 1414.86 plus-or-minus 0.01 feet above sea level, North American Vertical Datum of 1988, based on differential GPS Survey on 27 Oct. 2010.
PERIOD OF RECORD -

Water levels were recorded periodically from 29 May 1987 to the present. Water levels were recorded hourly 08 Dec. 1998 at 01:00 CST to the present, except during the following periods:

06 Sept. 2012 at 13:00 CDT - 09 Jan. 2013 at 14:00 CST: due to transducer failure.
31 Dec. 2013 at 19:00 CST: due to an unknown WL spike.
31 Dec. 2013 at 19:00 CST: due to an unknown WL spike.
28 Jul. 2014 - 01 Aug. 2014: due to a WL spikes during QW sampling.

When possible, missing daily-average water levels (above) were accurately estimated based on the trend of the hydrograph during these periods until 30 September 2016.

NOTE: Continuous water level data during winter months commonly becomes more noisy, likely due to influences from the frozen ground. This is common among the continuous GW sites at the Bemidji Research Site. Also, sharp rises and falls in water level unit values are real, when compared against nearby sites.

NOTE: Continuous water level data is uncorrected and saved in various excel spreadsheets from 08 Dec. 1998 at 01:00 CST to 06 September 2012 12:00 CDT. These data are stored locally in the USGS Minnesota Water-Science Center archives. Beginning on 06 September 2012 13:00 CDT, continuous water level data begin to be stored in the USGS National Water Information System (NWIS) database and worked/approved through the standard USGS Continuous-Records-Processing system.

GAGE -

Water level and water temperature were measured with a KSPI 500 submersible pressure transducer (SN: unknown) during 08 Dec. 1998 to 09 Jan. 2013 at 13:00 CST, accurate to 0.01 feet and 0.1°C respectively. Water level and water temperature are currently measured with a Design Analysis H-310 submersible pressure transducer (SN: 4878) beginning on 09 Jan. 2013 at 15:30 CST to the present, accurate to to 0.01 feet and 0.1°C respectively. Barometric Pressure is measured with a Setra 278 sensor during 04 May 2010 at 15:00 CDT to the present, which measures barometric pressure hourly. Barometric pressure sensor records units of millibars. Barometric pressure sensor and data are uncalibrated. Unventilated shelter temperature, and battery voltage are measured by a Campbell Scientific, Inc. CR10 data logger, which also records all data hourly. A Campbell Scientific, Inc. SM192 storage module is connected to the CR10 data logger. The data logger is housed in a 2ft. X 2ft. aluminum shelter attached to the top of well casing. The gage is powered by direct 110 volt AC/DC power and a 12v, 12amphr station battery, which is wired into a Solar Sunsaver voltage regulator. Communication to data logger is via telephone line and a Campbell Scientific COM210 modem. A Met One Instruments, Inc. 385 heated tipping-bucket rain gage was added to the station on 04 Jun. 2009 at 16:00 CDT, which measures and records precipitation total hourly. Rain gage is nominally accurate to 0.01 inches. It's suspected that the heating device on the rain gage is not working properly, so precipitation data during the freezing winter months (Dec-Apr) should be considered suspect. The data logger was re-programmed on 09 Jan. 2013 at 16:00 CST and data logger data began to totalize precipitation data, instead of zero-ing precipitation data every hour. These precipitation data are currently being corrected to hourly data records.

COOPERATION - Well 604B is operated in cooperation with the U.S. Geological Survey's Toxic Substances Hydrology Program, Minnesota Pollution Control Agency, Enbridge Energy Inc., and Beltrami County. This well is located at the National Crude-Oil Spill Research Site near Bemidji, Minnesota.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD -

Precipitation were recorded hourly 09 Jul. 2009 at 12:00 CD to the present, except during the following periods:

04 Apr. 2013 at 15:00-16:00 CDT: due to removing false tips during cleaning and calibration.
23 Jul. 2013 at 11:00 CDT: due to removing false tip during cleaning and servicing.
31 Dec. 2013 at 20:00 CST: due to unknown bad value/spike.
22 Oct. 2014 at 15:00 CDT: due to removing false tip during cleaning and servicing.
28 Apr. 2015 at 09:00-10:00 CDT: due to removing false tips during cleaning and calibration.
19 Oct. 2015 at 18:00 CDT: due to removing false tip during cleaning and servicing.
18 Apr. 2016 at 18:00-19:00 CDT: due to removing false tips during cleaning and calibration.
19 Oct. 2016 at 10:00 CDT: due to removing false tips during cleaning and servicing.
18 Apr. 2017 at 16:00 CDT: due to removing false tips during cleaning and servicing.
17 Oct. 2017 at 13:00 CDT: due to removing false tips during cleaning and servicing. 

NOTE: Precipitation data is uncorrected and saved in various excel spreadsheets from 09 Jul. 2009 at 12:00 CDT to 06 September 2012 at 12:00 CDT. These data are stored locally in the USGS Minnesota Water-Science Center archives. Beginning on 06 September 2012 at 13:00 CDT, precipitation data began to be stored in the USGS National Water Information System (NWIS) database and worked/approved through the standard USGS Continuous-Records-Processing system.

INSTRUMENTATION - Precipitation is measured with a Met One Instruments, Inc. tipping-bucket rain gage, which is accurate to 0.01 inches. The rain gage is "heated" and uncovered during the winter. However, it's suspected that the heating device on the rain gage is not working properly, so precipitation data during the freezing winter months (December through early April) should be considered suspect. If this rain gage is not heating, then precipitation data during freezing periods result from melting of snow during warm periods and do NOT represent actual precipitation.
WATER-QUALITY RECORDS
WELL CHARACTERISTICS - Depth 29.71 ft. Upper casing diameter 2.04 in; top of first opening 27.01 ft, bottom of last opening 27.51 ft. The hole for well 604B was drilled on 29 May 1987 with an 7.25-inch-diameter, hollow stem auger drill rig to an unknown depth. The well is constructed of a 0.50-feet-long, 2.04-inch-diameter, schedule-40 PVC, 0.010-inch slotted well screen, attached to length/s of 10.00 feet of 2.04-inch-diameter, schedule-40 PVC well casing. The well casing measuring point (stickup) was 2.05 feet (1414.86 ft. NAVD88, +/- 0.01 ft.) above land surface when measured on 29 May 1987. The open interval of the well is between 27.01 and 27.51 feet below land surface and the total well depth is 29.71 feet below land surface.
DATUM - Land-surface datum is 1,412.81 ft above North American Vertical Datum of 1988. Measuring point: MP assumed to be the top of casing, not protection post, 2.05 ft above land-surface datum, May 29, 1987 to present. The measuring point is a black mark on the 2-inch PVC well casing, which is visible through the floor of the aluminum shelter that is mounted on top of well 604B, and was 2.05 feet above land surface on 29 May 1987. Elevation of the measuring point is 1414.86 plus-or-minus 0.01 feet above sea level, North American Vertical Datum of 1988, based on differential GPS Survey on 27 Oct. 2010.
PERIOD OF RECORD -

Water temperatures were recorded hourly 20 Dec. 2011 at 16:00 CST to the present, except during the following periods:

09 Jan. 2013: due to deploying a new transducer.
04 Apr. 2013: due to deploying calibrating thermistor in the well.
23 Jul. 2013: due to a WT spike during QW sampling.
29 Jul. 2014 - 01 Aug. 2014: due to a WT spike during QW sampling.
28 Apr. 2015: due to a WT spike during a site visit.
09 Aug. 2015 at 17:00 CDT: due to transducer being removed from well during water temperature measurement.
19 Aug. 2015: due to a WT spike during QW sampling.
02 Aug. 2016 at 10:00 13:00 CDT : due to removing transducer from the well.
02 Aug. 2016 at 17:00-23:00 CDT : due to a WT spike during QW sampling.
24 Jun. 2017 at 09:00-13:00 CDT : due to a WT spike during QW sampling. 
21 Jun. 2019 at 15:00-20:00 CDT : due to a WT spike during QW sampling 

When possible, the missing daily-average water temperatures (above) were accurately estimated based on the trend of the thermograph during these periods.

NOTE: Continuous water temperature data is uncorrected and saved in various excel spreadsheets from 20 Dec. 2011 at 16:00 CST to 06 September 2012 12:00 CDT. These data are stored locally in the USGS Minnesota Water-Science Center archives. Beginning on 06 September 2012 13:00 CDT, continuous water level data begin to be stored in the USGS National Water Information System (NWIS) database and worked/approved through the standard USGS Continuous-Records-Processing system.

COOPERATION - Well 604B is operated in cooperation with the U.S. Geological Survey's Toxic Substances Hydrology Program, Minnesota Pollution Control Agency, Enbridge Energy Inc., and Beltrami County. This well is located at the National Crude-Oil Spill Research Site near Bemidji, Minnesota.
INSTRUMENTATION - Water temperature was measured with a KPSI 500 submersible pressure transducer during 08 Dec. 1998 to 09 Jan. 2013 at 13:00 CST, accurate to +/- 0.3°C. Temperature differences were accurate to 0.1°C.

Beginning on 09 Jan. 2013 at 15:30 CST to the present, water temperature is currently being measured with a Design Analysis H-310 submersible pressure transducer, accurate to +/- 0.3°C. Temperature differences are accurate to 0.1°C.