SCS National Engineering Handbook: Engineering geology

20 feet abutment adequate alluvium analysis aquifers augers backhoes borings borrow area borrow material centerline chapter compaction consolidated consolidated rock copies correlation cross sections Dam Sites detailed site investigation detailed subsurface investigation determine downstream toe drilling elevation emergency spillway emergency-spillway ENGINEERING GEOLOGY equipment EWP Unit excavation field tests form SCS-35A foundation drains foundation materials geologic conditions geologic investigation geologic profile geologic report geologist graphic logs ground water holes and number inch equals indicate interpretation logic conditions minimum depth number of samples obtained outlet structure plans and profiles plotted preliminary site investigation principal spillway record Relative density relief-well reservoir riprap rock core samples needed schistosity shear strength sieve sites in group soil cement Soil Mechanics Laboratory soil mechanics tests standard penetration test strata stratum stream channel subsurface exploration surface test holes thickness tion turbed unconsolidated materials undisturbed samples Unified soil classification usually water table