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-15- <br /> and replaced with fill compacted to at least 95 percent of the maximum <br /> dry density. Footings should be at least 2 feet wide, and should bear <br /> at least 18 inches below lowest adjacent finished grade. For footings <br /> constructed as recommended, a design allowable bearing pressure of 2000 <br /> pounds per square foot (psf) is recommended. We estimate that total <br /> potential settlements should not exceed 1 inch. <br /> Kasch Park Two-Story Concession: Anticipated subsurface conditions at <br /> this structure are based on the results of TP-205, where medium dense to <br /> dense unweathered till was encountered at about Elevation 559. Softball <br /> field grades are planned to range from Elevation 557 to 559. Thus, it <br /> appears that footings will bear on medium dense native soil . Footings <br /> should be at least 2 feet wide, and should bear at least 18 inches below <br /> lowest adjacent finished grade. For footings constructed as recom- <br /> mended, a design allowable bearing pressure of 3000 psf is recommended. <br /> For this bearing pressure, we estimate that total potential settlements <br /> should not exceed 1 inch. <br /> Kasch Park Maintenance Facility: For this structure, subsurface condi- <br /> tions at TP-207 indicated that dense native soil can be expected below a <br /> depth of about 1 foot, corresponding to Elevation 567. Considering the <br /> proximity to the softball fields, we assume that final grade will be <br /> about Elevation 560. We recommend that footings bear on dense native <br /> soil , have a minimum width of at least 2 feet, and should bear at least <br /> 18 inches below lowest adjacent finished grade. For footings constructed <br /> as recommended, a design allowable bearing pressure of 3000 psf is rec- <br /> ommended. For this bearing pressure, we estimate that total potential <br /> settlements should not exceed 1/2 inch. <br /> Kasch Park Picnic Shelters: Similar soil conditions were encountered at <br /> the two proposed picnic shelters, corresponding to the locations of <br /> TP-201 and TP-208. Medium dense, relatively clean till fill or unweath- <br /> ered till was observed from a depth of 0.8 feet to about 6 feet. Suit- <br /> able foundation support can be provided by excavating existing soil to a <br /> depth of 2 feet below the planned bottom of footing elevation and re- <br /> placing it with fill compacted to at least 95 percent of the maximum dry <br />