Agenda - Council - 12/14/2021 - Laserfiche WebLink

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Groundwater was encountered in 10 of the 12 soil borings at depths ranging from about 71/2 to 19 1/2 f eet below the ground surface,corresponding to elevations ranging from about 963 to 8811/2 feet above mean sea level. We generally do not anticipate that groundwater will be encountering during grading activities but could be encountered during utility construction and dewatering could be required. With the building pad prepared as recommended, it is our opinion the footings can be designed for a net allowable bearing pressure up to 3,000 pounds per square foot (psf). The following sections provide recommendations for foundation design and construction. 4.3 Site Grading Recommendations Excavation Structures exist on the project site that will be removed/demolished to make way for the proposed development. We recommend that all building remnants including former foundations, footings, floor slabs, foundation walls and underground utilities be removed from within the building,roadway,utility and oversize area. We recommend that all vegetation, topsoil and any soft or otherwise unsuitable soils, if encountered, be removed from below the proposed building and oversize areas. Table 4 below summarizes the anticipated excavation depths at the soil boring locations. Excavation depths may vary and could be deeper. Table 4.Anticipated Excavation Depths Measured Anticipated Anticipated Approximate Boring Surface p p pp Number Elevation Excavation Excavation Groundwater Depth (feet)* Elevation(feet)* Elevation (feet)* (feet) SB-1 884.3 1 (Pond) 8831/2 8661/2 SB-2 903.2 1 (Pond) 902 NE SB-3 889.1 1 888 8791/2 SB-4 892.4 1 (Pond) 8911/2 8811/2 SB-5 888.3 1 8871/2 876 SB-6 883.3 1 (Pond) 8821/2 876 SB-7 882.6 1 8811/2 863 SB-8 875.1 1 (Pond) 874 863 SB-9 888.5 1 (Pond) 8871/2 881 SB-10 890.0 1 -12 889-878 878 SB-11 902.5 1 901 1/2 NE SB-12 885.7 1 (Pond) 8841/2 871.2 =Excavation and groundwater elevations were rounded to nearest 1/2 foot. NE=Not Encountered 7