5203 S 4TH AVE 2016-01-01 MF Import

CI�5C40E TESTING LGBOQATORY, INC. April 2, 1979 Cert. No. 794-3G Craig Bunney Construction Page 2 located at the alley. Saturation has somewhat softened the building area soils; however, placement of the rip-rap appears to stabilized the majority of the area. Recommendations: Pr��posed duplex construction within the excavation could be adequately performed, if the following recommendations for structural support and stabilization are utilized. Znitially, dewaterinq of the building site and drainage of the excavation slopes should be performed. This can best be performed through placement of an interceptor trench and drain near the base of tF:e excavation slope. This drain should intercept most ground- water entering the excavation. The drain should be constructed such that the water is directed into the existing catch basin down- slope. The drain should consist of six inches perforated pipe imbedded in washed aggregate. Slope stabilization should be performed. The existing easterly slope sliould be laid back approximately 2:1 prior to placement of a rockery installation. This installation should consist of , eighteen (18) inches of washed aqgreqate placed upon the slope concurrent with the placement of large rockery rock, well keyed into position. 7'he washed aggregate should be placed to connect with the interceptor drain, such that water entering the system will be di.rected downslope within the drain. The rockery retaining walls should be limited to ten (10) feet in height, which creates ttie necessity of terracing the slope to conform. A twenty (20) foot horizontal aspect should be utilized, to continue to nominal _ 2:1 slope gradient. Th.: northerly and southerly excavation slopes should also be treated uaing the above procedure; however, the nominal slope gradient could be reduced to l:l slope. -1 � •