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Water-Year Summary for Site 450543093105407

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Available Parameters
00010 Temperature, water(Mean)  
00010 Temperature, water(Mean)  
00095 Specific cond at 25C(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
450543093105407 GS1-MW8 TCAAP Site
Sand and gravel aquifers (glaciated regions)
Glacial Surficial Sand and/or Gravel
LOCATION - Lat 45°05'42.85", long 93°10'53.80" referenced to North American Datum of 1983, Ramsey County, MN, Hydrologic Unit 07010206, The well is located in the former Twin Cities Army Ammunition Plant (TCAAP) site, 0.8 miles east of the USGS Mounds View office. The well is located approximately 0.5 miles NE of the intersection of US HWY 35W and County Rd. 10 (Mounds View Blvd).
GROUNDWATER RECORDS
WELL CHARACTERISTICS - Depth 8 ft. Upper casing diameter 2 in; top of first opening undefined, bottom of last opening undefined. Well GS1-MW8 is a groundwater observation well that was installed on 03 September 2021 with a Geoprobe 66DT to 8.00 feet. The well is constructed of a 2.00-feet-long, 2-inch-diameter, stainless steel, 0.010-inch slotted, well screen, attached with to length/s of 2-inch-diameter, stainless steel well casing. The well casing measuring point (stickup) was 1.88 feet (890.80 ft. NAVD88, +/- 0.05 ft.) above land surface when measured on 03 September 2021. The open interval of the well is between 6.00 and 8.00 feet below land surface and the total well depth is 8.00 feet below land surface. 
DATUM - Land-surface datum is 888.92 ft above North American Vertical Datum of 1988. Measuring point: Black mark on top of 1.25-inch diameter stainless steel well casing, 1.88 ft above land-surface datum, UNDEFINED BEGIN DATE to present. The measuring point is a black mark on top of the 2-inch diameter stainless steel well casing, which was 1.88 feet above land surface on 03 September 2021. Elevation of the measuring point is 890.80 plus-or-minus 0.05 feet above sea level, North American Vertical Datum of 1988, based on a differential GPS and digital levels survey completed by the U.S. Geological Survey on 16 Nov. 2021.
PERIOD OF RECORD -

Water levels were recorded periodically from 04 October 2021 to 29 May 2024. Water levels were recorded every 5-minutes from 18 October 2021 at 16:20 CDT to 12 Feb. 2024 at 11:50 CST, except during the following periods:

18 Oct. 2021 at 16:20-17:55 CDT: due to WL equilibrating back to static after transducer deployment.
19 Nov. 2021 at 13:05-14:35 CST: due to replacing transducer during this period.
02 May 2022 at 12:55-22:05 CDT: due to deleting spike & equilibration data caused by QW sampling.
13 Jul. 2023 at 08:45-13:40 CDT: due to deleting spike & equilibration data caused by QW sampling.
10 Aug. 2022 at 07:40 CDT - 16 Nov. 2022 at 11:50 CST: due to sensor failure from animal chewing through sensor cable.
01 May 2023 at 13:05-17:00 CDT: due to deleting spike & equilibration data caused by QW sampling.
06 Jun. 2023 at 08:20-14:00 CDT: due to deleting spike & equilibration data caused by QW sampling.
27 Jun. 2023 at 10:35-15:20 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 Aug. 2023 at 03:00 CDT - 16 Aug. 2023 at 12:55 CDT: due to dead station batteries & deleting spike during inspection.
12 Sept. 2023 at 10:20-13:50 CDT: due to deleting spike & equilibration data caused by QW sampling.
13 Sept. 2023 at 08:40-13:15 CDT: due to deleting spike & equilibration data caused by QW sampling.
14 Sept. 2023 at 08:00-12:20 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 Sept. 2023 at 08:15-12:35 & 14:10-21:05 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 Nov. 2023 at 10:10-11:20 CST: due to removing sensor from well during a sensor inspection.
15 Nov. 2023 at 11:25 CST - 12 Feb. 2024 at 11:50 CST: due to sensor failure from animal chewing through sensor cable.

GAGE -

Continuous water level, water temperature, specific conductance, and battery voltage were measured with a previously-used OTT CTD pressure transducer with a built-in specific conductance sensor. These data were recorded every 5-minutes from 19 November 2021 at 13:20 CST to 12 Feb. 2024 at 11:50 CST by the same OTT CTD pressure transducer, which had a data logger built into it. The data logger was housed inside a 4-inch diameter PVC pipe attached to the side of the well casing. The pressure transducer was powered by 3 AA alkaline batteries that were inside of the data logger communications rod. Data were downloaded manually and no telemetry at the gage.

The damaged OTT CTD pressure transducer was removed from the well on 12 Feb. 2024 at 11:50 CST.

COOPERATION - This site was operated from 03 September 2021 to 29 May 2024 by the U.S. Geological Survey as a monitoring well for the USGS Twin Cities Army Ammunition Plant (TCAAP) "Site K" study. The USGS Twin Cities Army Ammunition Plant (TCAAP) "Site K" study is a collaborative study between the U.S. Geological Survey and the U.S. Army.
WATER-QUALITY RECORDS
WELL CHARACTERISTICS - Depth 8 ft. Upper casing diameter 2 in; top of first opening undefined, bottom of last opening undefined. Well GS1-MW8 is a groundwater observation well that was installed on 03 September 2021 with a Geoprobe 66DT to 8.00 feet. The well is constructed of a 2.00-feet-long, 2-inch-diameter, stainless steel, 0.010-inch slotted, well screen, attached with to length/s of 2-inch-diameter, stainless steel well casing. The well casing measuring point (stickup) was 1.88 feet (890.80 ft. NAVD88, +/- 0.05 ft.) above land surface when measured on 03 September 2021. The open interval of the well is between 6.00 and 8.00 feet below land surface and the total well depth is 8.00 feet below land surface. 
DATUM - Land-surface datum is 888.92 ft above North American Vertical Datum of 1988. Measuring point: Black mark on top of 1.25-inch diameter stainless steel well casing, 1.88 ft above land-surface datum, UNDEFINED BEGIN DATE to present. The measuring point is a black mark on top of the 2-inch diameter stainless steel well casing, which was 1.88 feet above land surface on 03 September 2021. Elevation of the measuring point is 890.80 plus-or-minus 0.05 feet above sea level, North American Vertical Datum of 1988, based on a differential GPS and digital levels survey completed by the U.S. Geological Survey on 16 Nov. 2021.
PERIOD OF RECORD -

Water quality samples have been collected periodically from 13 Oct. 2021 to 06 May 2024.

Water temperature (6.7 ft. BLS):

Water temperature was recorded every 5-minutes from 18 Oct. 2021 at 16:20 CDT to 19 Nov. 2021 at 13:05 CST, except during the following periods:

18 Oct. 2021 at 16:20-16:35 CDT: due to thermistor equilibrating to GW temperature after deployment.

Water temperature (8.0 ft. BLS):

Water temperature was recorded every 5-minutes from 19 Nov. 2021 at 13:20 CST to 12 Feb. 2024 at 11:50 CST, except during the following periods:

17 Feb. 2022 at 09:00-10:05 CST: due to removing sensor from well during a sensor inspection.
19 Oct. 2021 at 13:20-13:30 CDT: due to thermistor equilibrating to GW temperature after deployment.
17 Feb. 2022 at 09:10-10:25 CST: due to removing thermistor from well during a sensor inspection.
22 Feb. 2022 at 11:15-20:00 CST: due to deleting spike & equilibration data caused by QW sampling.
02 May 2022 at 13:00-15:00 CDT: due to deleting spike & equilibration data caused by QW sampling.
18 May 2022 at 08:40-12:20 CDT: due to removing thermistor from well during a sensor inspection.
13 July 2022 at 08:45-18:05 CDT: due to deleting spike & equilibration data caused by QW sampling.
10 Aug. 2022 at 07:50-08:55 CDT: due to removing thermistor from well during a sensor inspection.
10 Aug. 2022 at 09:00 CDT - 16 Nov. 2022 at 12:50 CDT: due to sensor failure from animal chewing through sensor cable.
10 Aug. 2022 at 12:55-15:50 CDT: due to thermistor equilibrating to GW temperature after deployment.
13 Feb. 2023 at 08:30-10:50 CST: due to removing thermistor from well during a sensor inspection.
06 Jun. 2023 at 08:20-17:50 CDT: due to deleting spike & equilibration data caused by QW sampling.
27 Jun. 2023 at 10:40-17:50 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 Aug. 2023 at 03:00 CDT - 16 Aug. 2023 at 11:35 CDT: due to dead station batteries.
16 Aug. 2023 at 10:45-15:30 CDT: due to removing sensor from well during a sensor inspection.
15 Sept. 2023 at 14:10-19:45 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 Nov. 2023 at 10:00-11:20 CST: due to removing sensor from well during a sensor inspection.
15 Nov. 2023 at 11:25 CST - 12 Feb. 2024 at 11:50 CST: due to sensor failure from animal chewing through sensor cable.

Specific Conductance, uS/cm, (8.0 ft. BLS):

Specific conductance was recorded every 5-minutes from 19 Nov. 2021 at 13:20 CST to 12 Feb. 2024 at 11:50 CST, except during the following periods:

17 Feb. 2022 at 09:00-10:05 CST: due to removing sensor from well during a sensor inspection.
22 Feb. 2022 at 11:55-19:05 CST: due to deleting spike & equilibration data caused by QW sampling.
02 May 2022 at 12:55-15:40 CDT: due to deleting spike & equilibration data caused by QW sampling.
16 May 2022 at 03:55-07:05 CDT: due to low battery voltage causing noisy and inaccurate data values.
16 May 2022 at 23:35-08:40 CDT: due to low battery voltage causing noisy and inaccurate data values.
17 May 2022 at 22:50 CDT to 18 May 2022 at 05:25 CDT: due to low battery voltage causing noisy and inaccurate values.
18 May 2022 at 08:00-08:35 CDT: due to low battery voltage causing noisy and inaccurate data values.
18 May 2022 at 08:50-10:00 CDT: due to removing sensor from well during a sensor inspection.
10 Aug. 2022 at 07:55 CDT - 16 Nov. 2022 at 11:50 CST: due to sensor failure from animal chewing through sensor cable.
16 Nov. 2022 at 13:25-16:00 CST: due to deleting equilibration data caused by sensor replacement.
11 Aug. 2023 at 21:05 CDT - 12 Aug. 2023 at 09:40 CDT: due to dead station batteries.
12 Aug. 2023 at 20:55 CDT - 16 Aug. 2023 at 10:40 CDT: due to dead station batteries.
12 Sept. 2023 at 10:25-19:20 CDT: due to deleting spike & equilibration data caused by QW sampling.
13 Sept. 2023 at 09:00-16:15 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 Sept. 2023 at 08:15-01:25 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 Nov. 2023 at 10:10-11:20 CST: due to removing sensor from well during a sensor inspection.
15 Nov. 2023 at 11:25 CST - 12 Feb. 2024 at 11:50 CST: due to sensor failure from animal chewing through sensor cable.

COOPERATION - This site was operated from 03 September 2021 to 29 May 2024 by the U.S. Geological Survey as a monitoring well for the USGS Twin Cities Army Ammunition Plant (TCAAP) "Site K" study. The USGS Twin Cities Army Ammunition Plant (TCAAP) "Site K" study is a collaborative study between the U.S. Geological Survey and the U.S. Army.
INSTRUMENTATION - Water temperature and specific conductance were measured with an OTT CTD submersible pressure transducer and specific conductance sensor. Water temperature data are accurate to ±0.1°C. Differences in water temperature are also accurate to 0.1°C. Specific conductance data are accurate to ±1.5% of measurement value; (min ±10 uS/cm). Specific conductance differences are accurate to 10 uS/cm.