4711 GLENHAVEN DR 2016-01-01 MF Import

, 9.2 Tem�orarv Cut Sloaes As mentioned previously, we anticipate that foundation ezcavations on the order of 2 :0 12 feet, and fills on the order of 3 to 5 feet will be required depending on che final siting of the house. The northeast perimeter area of the driveway may require a mazimum fill depth of 13 feet to reach proposed grades. Additionally, the upper parking area and south end of the bridge area may require slope excavations and fills of approxunately 5 to 7 feet in depth to construct concrete retaining walls proposed for these areas. The foundation excavations will be completed widiin the moderately sloping base of the swale. We do not recotnmend excavating inro the toe of the adjacen[ fill slope due the fill soils loose condition and the potentially unstable slope conditions which may result. In our opinion, stable conswction slopes should be the responsibility of d�e contractor and should be determined during construction based on the encountered conditions. For estimating , purposes, however, we anticipare that temporary, unsupported cut slopes in the fill and natural soils can be made vertically up to 4 feet in height. For excavations up to 10 feet in height, the ! cut sfope angie should not exceed 1.SH:1V wid�in the upper loose, recessional sand soils or � weathered silty till, and 1H:IV wid�in the underiying dense, lodgment till soil. The contractor should cover all cuts with p:astic sheeting if wet weather is imminent until the excavations are bacl:filled. As is typical widi carthwork operations, sonte sloughing and raveling may occur and cut slopes may have ro be adjusted in the field. In addition, WIS;i?./OSI-IA regulations should be followed at all times. We would recommend diat the foundation walls be consttvcted and bac}.�filled as soon as possible after completing the foundation cxcavation to maintain the level of stabiliry pr:sendy available within the adjacent fill slope. � 9.3 Permanent Slopes For dcsign purposes, permanettt cut and fill slopes should aot exceed ZH:1V. To prevent raveling and severe erosion on U�ese slopes, erosion protection sl�ouid be implemented immediatelv after excavations are complete. 10.0 FOUNDATtONS Spread footings may be used for Uuilding support �vhen founded on the medium dense, silry sand soils which should be exposed after site excavations, or on compacred structural fill soils. To limit total and differential settlements, �ve recommend diat an allowable foundation soil bearing pressure of 2,000 pounds per square foot (psf� be utilized for design purFoses, I inciuding both dead and live loads. An increase of one-third may be used for short-term wind I or scismic loading. Perimeter footings should be buried at least 13 inches into d�e suttoundine �� soil for frost protection. All footings must penctrate to die prescribed bearin� stratum and no footinc should be founded in or above loose, or�acuc or fill soils. All footings should have a minimum width of 13 inchcs given diat the structure will be 3-stories in height. We 10