Brush Creek Site 14 & 15 Piezometer Data Summary.pdf

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Attached to
Brush Creek 14&15 Dam Rehabilitation-Construction
Solicitation number
CRFQ 1400 AGR2500000008 7
Issued by
Mingo County, West Virginia

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This is a geotechnical investigation report prepared by the Aterra-Schnabel JV for the Natural Resources Conservation Service (NRCS) in West Virginia, documenting piezometer water level data from two proposed dam sites on Brush Creek. The report presents comprehensive hydrological monitoring data collected from observation wells at Site 14 and Site 15, capturing groundwater elevation measurements and water level fluctuations over an extended monitoring period from March 2019 through July 2024. Site 14 includes two monitored boreholes (B-42A and B-641) with normal pool elevation at 2420.2 feet, while Site 15 includes six monitored locations (B-51A, B-651, GF-1D, GF-1S, GF-2D, GF-2S, and GF-3) with normal pool elevation at 2489.5 feet. The data collection spans nearly five years and includes observations under various reservoir conditions, including normal pool levels, low pool conditions, and artesian pressure conditions at certain wells.

The piezometer data demonstrates groundwater behavior at varying hydraulic heads across both sites, with water level readings recorded at multiple dates to establish baseline conditions for the geotechnical investigation. Notable findings include consistent water elevations at Site 14 ranging from approximately 2397.6 to 2416.3 feet, while Site 15 exhibits more variable conditions with elevations ranging from 2435.2 to 2486.0 feet. Several observation wells at Site 15, particularly B-651 and GF-3, displayed artesian conditions during the initial monitoring period in 2019, indicating upward hydraulic pressure. The document serves as supporting technical documentation for preliminary and final geotechnical assessments associated with the proposed Brush Creek dam projects, with data organized by boring identification, ground surface elevation, depth to water, water elevation, and monitoring date.

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NRCS - West Virginia Preliminary Geotechnical Investigation Report – Brush Creek Site 14

Summary of Water Levels in Observations at Brush Creek Site 14 Normal Pool EL = 2420.2 ft.

Boring ID Ground Surface Elevation (ft)

Depth to Water (ft)

Elevation of Water (ft)

Date of Water Level Reading Notes Event Reservoir Level

B-42A 2446.3 48.7 2397.6 3/28/2019 10:52 Observation Well B-42A 2446.3 37.6 2408.7 3/29/2019 9:46 Observation Well B-42A 2446.3 31.8 2414.5 3/30/2019 12:41 Observation Well B-42A 2446.3 31.0 2415.3 3/31/2019 8:45 Observation Well B-42A 2446.3 31.7 2414.6 4/3/2019 9:13 Observation Well B-42A 2446.3 29.7 2416.6 5/6/2019 14:16 Observation Well B-42A 2446.3 31.5 2414.8 9/27/2021 14:30 Observation Well Normal B-42A 2446.3 30.6 2415.7 2/1/2022 10:30 Observation Well Normal B-42A 2446.3 30.3 2416.0 5/12/2022 0:00 Observation Well Normal B-42A 2446.3 30.0 2416.3 2/7/2023 0:00 Observation Well B-42A 2446.3 30.9 2415.4 10/1/2023 0:00 Observation Well B-42A 2446.3 30.6 2415.7 1/30/2024 0:00 Observation Well Normal B-42A 2446.3 30.8 2415.5 4/29/2024 0:00 Observation Well Normal B-42A 2446.3 30.8 2415.5 7/24/2024 0:00 Observation Well Normal B-641 2424.7 18.0 2406.7 3/31/2019 8:23 Observation Well B-641 2424.7 18.3 2406.4 4/2/2019 7:33 Observation Well B-641 2424.7 18.2 2406.5 4/3/2019 8:30 Observation Well B-641 2424.7 18.2 2406.5 4/22/2019 10:09 Observation Well B-641 2424.7 17.6 2407.1 5/6/2019 14:10 Observation Well B-641 2424.7 18.7 2406.0 9/27/2021 14:45 Observation Well Normal B-641 2424.7 18.5 2406.2 2/1/2022 10:30 Observation Well Normal B-641 2424.7 18.3 2406.4 5/12/2022 0:00 Observation Well Normal B-641 2424.7 18.4 2406.3 2/7/2023 0:00 Observation Well B-641 2424.7 18.5 2406.2 10/1/2023 0:00 Observation Well B-641 2424.7 18.3 2406.4 1/30/2024 0:00 Observation Well Normal B-641 2424.7 18.5 2406.2 4/29/2024 0:00 Observation Well Normal B-641 2424.7 18.5 2406.2 7/24/2024 0:00 Observation Well Normal

Project 18C35013.03 Page 1 of 5 Aterra-Schnabel JV

Final Geotechnical Investigation Report – Brush Creek Site 15

Summary of Water Levels in Observations at Brush Creek Site 15 Normal Pool EL (ft) 2489.5

Boring ID Ground Surface Elevation (ft)

Depth to Water (ft)

Elevation of Water (ft)

Date of Water Level Reading Notes Event Reservoir Level

B-51A 2508.1 68.7 2439.5 3/20/2019 11:24 Observation Well B-51A 2508.1 56.7 2451.4 4/3/2019 11:20 Observation Well B-51A 2508.1 62.0 2446.1 4/17/2019 15:57 Observation Well B-51A 2508.1 70.9 2437.2 5/1/2019 11:25 Observation Well B-51A 2508.1 71.6 2436.5 5/6/2019 12:20 Observation Well B-51A 2508.1 72.8 2435.3 5/9/2019 12:15 Observation Well B-51A 2508.1 72.4 2435.7 5/13/2019 12:14 Observation Well B-51A 2508.1 46.1 2462.0 9/29/2021 18:15 Observation Well Low Pool (~8ft.)

B-51A 2508.1 48.1 2460.0 2/1/2022 11:30 Observation Well ~10’ low B-51A 2508.1 47.2 2460.9 5/12/2022 0:00 Observation Well ~0.5’ high B-51A 2508.1 46.2 2461.9 2/7/2023 0:00 Observation Well B-51A 2508.1 46.5 2461.7 10/1/2023 0:00 Observation Well B-51A 2508.1 46.3 2461.8 1/30/2024 0:00 Observation Well Normal B-51A 2508.1 46.3 2461.8 4/29/2024 0:00 Observation Well Normal B-51A 2508.1 46.2 2461.9 7/24/2024 0:00 Observation Well Pool Level Low B-651 2436.8 11.4 2425.4 3/18/2019 14:37 Encountered B-651 2436.8 0.0 2436.8 3/18/2019 17:02 Completion B-651 2436.8 0.2 2436.6 3/19/2019 7:30 After Drilling B-651 2436.8 -0.7 2437.5 3/19/2019 11:39 Artesian Casing Pulled B-651 2436.8 -1.1 2437.9 4/3/2019 12:00 Artesian After Drilling B-651 2436.8 -1.5 2438.3 4/17/2019 15:44 Artesian Observation Well B-651 2436.8 -2.4 2439.2 5/6/2019 13:14 Artesian Observation Well B-651 2436.8 -2.1 2438.9 5/6/2019 17:15 Artesian Observation Well B-651 2436.8 -2.1 2438.9 5/9/2019 14:00 Artesian Observation Well B-651 2436.8 -2.7 2439.5 5/13/2019 11:57 Artesian Observation Well B-651 2436.8 0.0psi @guage - 9/29/2021 18:00 Observation Well Low Pool (~8ft.)

B-651 2436.8 0.0psi @guage - 2/1/2022 11:30 Observation Well B-651 2436.8 0.0psi @guage - 5/12/2022 0:00 Observation Well ~0.5’ high B-651 2436.8 0.0psi @guage - 2/7/2023 0:00 Observation Well Normal GF-1D 2507.4 33.5 2473.9 3/11/2019 17:40 Observation Well GF-1D 2507.4 33.4 2474.0 3/16/2019 13:50 Observation Well GF-1D 2507.4 33.7 2473.7 3/19/2019 8:22 Observation Well

Project 18C35013.04 Page 2 of 5 Aterra-Schnabel JV

Summary of Water Levels in Observations at Brush Creek Site 15 Normal Pool EL (ft) 2489.5

Boring ID Ground Surface Elevation (ft)

Depth to Water (ft)

Elevation of Water (ft)

Date of Water Level Reading Notes Event Reservoir Level

GF-1D 2507.4 34.6 2472.8 4/3/2019 13:18 Observation Well GF-1D 2507.4 33.9 2473.5 4/17/2019 15:30 Observation Well GF-1D 2507.4 32.8 2474.6 5/6/2019 12:54 Observation Well GF-1D 2507.4 38.3 2469.1 8/31/2021 10:35 Observation Well Low Pool GF-1D 2507.4 39.6 2467.8 9/29/2021 17:30 Observation Well Low Pool (~8ft.)

GF-1D 2507.4 41.9 2465.5 2/1/2022 11:40 Observation Well ~10’ low GF-1D 2507.4 35.9 2471.5 6/9/2022 12:00 Observation Well Normal GF-1D 2507.4 36.1 2471.3 2/7/2023 0:00 Observation Well Normal

GF-1D 2507.4 37.4 2470.0 10/1/2023 0:00

GF-1D 2507.4 37.2 2470.2 1/30/2024 0:00 Observation Well Normal GF-1D 2507.4 37.4 2470.0 4/29/2024 0:00 Observation Well Normal GF-1D 2507.4 37.4 2470.0 7/24/2024 0:00 Observation Well Pool Level Low GF-1S 2507.4 47.2 2460.2 3/11/2019 17:40 Observation Well GF-1S 2507.4 47.6 2459.8 3/16/2019 13:51 Observation Well GF-1S 2507.4 48.5 2458.9 3/19/2019 8:28 Observation Well GF-1S 2507.4 47.8 2459.6 4/3/2019 13:14 Observation Well GF-1S 2507.4 21.4 2486.0 4/17/2019 15:30 Observation Well GF-1S 2507.4 30.5 2476.9 5/6/2019 12:57 Observation Well GF-1S 2507.4 24.2 2483.2 8/31/2021 10:35 Observation Well Low Pool GF-1S 2507.4 44.1 2463.3 9/29/2021 17:30 Observation Well Low Pool (~8ft.)

GF-1S 2507.4 46.0 2461.4 2/1/2022 11:40 Observation Well ~10’ low GF-1S 2507.4 42.6 2464.8 6/9/2022 12:00 Observation Well Normal GF-1S 2507.4 29.9 2477.5 2/7/2023 0:00 Observation Well Normal

GF-1S 2507.4 30.3 2477.2 10/1/2023 0:00

GF-1S 2507.4 30.1 2477.3 1/30/2024 0:00 Observation Well Normal GF-1S 2507.4 30.3 2477.2 4/29/2024 0:00 Observation Well Normal GF-1S 2507.4 30.2 2477.2 7/24/2024 0:00 Observation Well Pool Level Low GF-2D 2476.5 33.1 2443.4 3/11/2019 17:50 Observation Well GF-2D 2476.5 33.3 2443.2 3/16/2019 13:53 Observation Well GF-2D 2476.5 33.2 2443.3 3/19/2019 9:10 Observation Well GF-2D 2476.5 33.0 2443.5 4/3/2019 12:20 Observation Well GF-2D 2476.5 33.3 2443.2 4/17/2019 15:35 Observation Well

Project 18C35013.04 Page 3 of 5 Aterra-Schnabel JV

Summary of Water Levels in Observations at Brush Creek Site 15 Normal Pool EL (ft) 2489.5

Boring ID Ground Surface Elevation (ft)

Depth to Water (ft)

Elevation of Water (ft)

Date of Water Level Reading Notes Event Reservoir Level

GF-2D 2476.5 33.1 2443.4 5/6/2019 13:04 Observation Well GF-2D 2476.5 34.1 2442.4 8/31/2021 11:00 Observation Well Low Pool GF-2D 2476.5 33.9 2442.6 9/29/2021 17:40 Observation Well Low Pool (~8ft.)

GF-2D 2476.5 36.3 2440.2 2/1/2022 11:40 Observation Well ~10’ low GF-2D 2476.5 35.3 2441.2 6/9/2022 12:10 Observation Well Normal GF-2D 2476.5 20.0 2456.5 2/7/2023 0:00 Observation Well Normal

GF-2D 2476.5 20.6 2455.9 10/1/2023 0:00

GF-2D 2476.5 20.4 2456.1 1/30/2024 0:00 Observation Well Normal GF-2D 2476.5 20.6 2455.9 4/29/2024 0:00 Observation Well Normal GF-2D 2476.5 20.6 2455.9 7/24/2024 0:00 Observation Well Pool Level Low GF-2S 2476.5 31.0 2445.5 3/11/2019 17:50 Observation Well GF-2S 2476.5 - - 3/16/2019 13:54 Dry Observation Well GF-2S 2476.5 - - 3/19/2019 9:15 Dry Observation Well GF-2S 2476.5 - - 4/3/2019 12:25 Dry Observation Well GF-2S 2476.5 - - 4/17/2019 15:35 Dry Observation Well GF-2S 2476.5 31.3 2445.2 5/6/2019 13:01 Observation Well GF-2S 2476.5 - - 8/31/2021 11:00 Dry Observation Well Low Pool GF-2S 2476.5 - - 9/29/2021 17:40 Dry Observation Well Low Pool (~8ft.)

GF-2S 2476.5 - - 2/1/2022 11:50 Dry Observation Well ~10’ low GF-2S 2476.5 - - 6/9/2022 12:10 Dry Observation Well Normal GF-2S 2476.5 33.0 2443.5 2/7/2023 0:00 Observation Well Normal

GF-2S 2476.5 33.7 2442.9 10/1/2023 0:00

GF-2S 2476.5 33.6 2442.9 1/30/2024 0:00 Observation Well Normal GF-2S 2476.5 33.7 2442.9 4/29/2024 0:00 Observation Well Normal GF-2S 2476.5 33.6 2442.9 7/24/2024 0:00 Observation Well Pool Level Low GF-3 2437.8 0.3 2437.5 3/11/2019 18:00 Observation Well GF-3 2437.8 -0.5 2438.3 3/16/2019 13:56 Artesian Observation Well GF-3 2437.8 -0.2 2438.0 4/3/2019 12:16 Artesian Observation Well GF-3 2437.8 -0.8 2438.6 4/17/2019 15:40 Artesian Observation Well GF-3 2437.8 -1.3 2439.1 5/6/2019 13:08 Artesian Observation Well GF-3 2437.8 1.5 2436.3 8/31/2021 11:05 Observation Well Low Pool GF-3 2437.8 1.5 2436.3 9/29/2021 17:45 Observation Well Low Pool (~8ft.)

Project 18C35013.04 Page 4 of 5 Aterra-Schnabel JV

Summary of Water Levels in Observations at Brush Creek Site 15 Normal Pool EL (ft) 2489.5

Boring ID Ground Surface Elevation (ft)

Depth to Water (ft)

Elevation of Water (ft)

Date of Water Level Reading Notes Event Reservoir Level

GF-3 2437.8 2.6 2435.2 2/1/2022 11:50 Observation Well ~10’ low GF-3 2437.8 2.3 2435.5 6/9/2022 12:20 Observation Well Normal GF-3 2437.8 1.8 2436.0 2/7/2023 0:00 Observation Well Normal

GF-3 2437.8 1.9 2435.9 10/1/2023 0:00

GF-3 2437.8 1.8 2436.0 1/30/2024 0:00 Observation Well Normal GF-3 2437.8 1.9 2435.9 4/29/2024 0:00 Observation Well Normal GF-3 2437.8 1.9 2435.9 7/24/2024 0:00 Observation Well Pool Level Low

Project 18C35013.04 Page 5 of 5 Aterra-Schnabel JV

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