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Trott Brook Crossing EAW <br />August 2021 <br />Table 7. Ground Water Elevations Observed During Geotechnical Site Assessment <br />Boring <br />Number <br />Ground Elevation, <br />Feet MSL <br />Water Table Depth Below Ground <br />Surface, Feet (End of Drilling) <br />Water Table Elevation, Feet MSL <br />(End of Drilling) <br />1 <br />884.3 <br />18.1 <br />866.2 <br />2 <br />903.2 <br />Not encountered <br />No water table to 882.2 <br />3 <br />889.1 <br />12.2 <br />876.9 <br />4 <br />892.4 <br />11.3 <br />881.1 <br />5 <br />888.3 <br />12.5 <br />875.8 <br />6 <br />883.3 <br />11.1 <br />872.2 <br />7 <br />882.6 <br />19.6 <br />863.0 <br />8 <br />875.1 <br />12.2 <br />862.9 <br />9 <br />888.5 <br />Not listed, 7.5 at time of drilling <br />881.0 at time of drilling <br />10 <br />890.0 <br />12.2 <br />877.8 <br />11 <br />902.5 <br />Not encountered <br />No water table to 881.5 <br />12 <br />885.7 <br />14.5 <br />871.2 <br />Three piezometers were installed on July 21, 2021 by Haugo GeoTechnical Services (Table 8). <br />Piezometer locations are shown in the GeoTechnical Boring Report (Appendix C). <br />Table 8. Piezometer Water Level Summar <br />Piezometer <br />Number <br />Date <br />Approximate Depth to <br />Groundwater (feet) <br />Approximate Groundwater <br />Elevation (feet) <br />SB-4/P-4 <br />8/4/2021 <br />10.81 <br />883.7 <br />SB-6/P-6 <br />8/4/2021 <br />8.26 <br />876.E <br />SB-10/P10 <br />8/4/2021 <br />8.75 <br />884.3 <br />The groundwater elevations observed with geotechnical borings and piezometer readings ranged <br />from 7.5 feet below the soil surface to greater than 21 feet below the soil surface. The elevation of <br />groundwater observed ranged from to 862.9 to 884.3 ft msl. <br />Boring logs for nearby wells were also referenced to determine the depth to groundwater in the <br />project area. The elevation depth to static groundwater levels in 11 groundwater wells located near <br />the project area ranged from 15 to 25 feet and from 862 ft msl to 885 ft msl (Table 9). <br />13 <br />