|Bemidji Toxics Research Site Well 604B|
|Township:||Lamers (T147N R35W)|
|Location:||In forest, 3.7 miles north of US Hwy. 2, 2.3 miles SE of Pinewood, MN|
|Land-surface elevation:||1412.81 +/- 0.01 feet, NAVD88|
|Installation:||May 29, 1987, for the Bemidji Toxics Research Site|
|Open interval:||27.01–27.26 feet|
|Original and current use:||Monitoring, for the U.S. Geological Survey|
|Type:||hydrologically unconfined sand and gravel|
|Thickness:||>29.71 feet (0.00–>29.71 feet, BLS)|
|Deposit:||glacially deposited sand and gravel|
This site 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.
Water levels below land surface are accurate to 0.01 feet. Water levels above National American Vertical Datum of 1988 (sea level) are calculated by subtracting recorded water levels from the land surface elevation, which is accurate to ± 0.01 feet based on a differential GPS survey. Water-level differences are accurate to within 0.01 feet.
Water temperature during 20 Dec. 2011 at 16:00 CST to 09 Jan. 2013 at 13:00 CST (measured with KPSI 500 transducer thermistor) were accurate to plus-or-minus 0.3°C, due to noisiness in the water temperature record. Differences in temperature were accurate to 0.3°C. Water temperatures during 09 Jan. 2013 at 15:30 CST to the 18 Oct. 2022 at 21:00 CDT (measured with Design Analysis H-310 transducer thermistor) were accurate to plus-or-minus 0.3°C. Differences in temperature are accurate to 0.1°C. Water temperatures during 04 Nov. 2022 at 02:00 CDT to 01 Nov. 2023 at 08:00 CDT (measured with Campbell CS451 transducer thermistor) were accurate to plus-or-minus 0.1°C. Differences in temperature were accurate to 0.1°C. Water temperatures during 03 Nov. 2023 at 10:00 CDT to the present (measured with KPSI 500 transducer thermistor) are accurate to plus-or-minus 0.3°C, due to noisiness in the water temperature record. Differences in temperature are accurate to 0.3°C.