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I I I I I I I I I I I I I I I I I I I Geotechnical Engineering Irrvestigation Geometry and Material Properties The cross-section at station 2+68 was used in the analysis and was considered representative of the abutment-embankment contact. The following penneabilities were used in the analysis. ...... . Horizontal ..Pei'meability .ftlsee U stream Shell Core Intact Rock Fractured Rock Downstream Shell 5 x 10-3 9 x 10-4 9 x 10-4 1 x 10-2 5 x 10-3 Vertieal Pehneabilityftlsee 5 x 10-3 9 x 10-4 9 x 10-4 I x 10-3 5 x 10-4 These penneabilities were based on field testing and observations. They are in general agreement with material properties for embankment dams as described in the Bureau of Reclamation, Design Standards, Embankment Dams, No 13, Chapter 8, dated 1987. The following five cases were analyzed. Casel: Zoned embankment, Reservoir Water El. 10,265 feet, upper 40 feet (elevation 10,250 to 10,290 feet) are fractured rock extending to the upstream face ofthe embankment, foundation rocks are fractured, and penneability of the downstream shell material lower than that of the fractured rock. Case 2: Zoned embankment, Reservoir Water El. 10,270 feet, upper 40 feet (elevation 10,250 to 10,290 feet) are fractured rock extending to the upstream face of the embankment, foundation rocks fractured and penneability of the downstream shell material lower than that of the fractured rock. Case 3: Zoned embankment, Reservoir Water El. 10,280 feet, upper 40 feet (elevation 10,250 to 10,290 feet) are fractured rock extending to the upstream face of the embankment, foundation rocks fractured and penneability of the downstream shell material lower than that of the fractured rock. Continental Dam Page 15