SCS National Engineering Handbook

50 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 delineate detailed site investigation detailed subsurface investigation determine downstream toe drainage drilling elevation emergency spillway emergency-spillway equipment EWP Unit excavation field tests form SCS-35A foundation drains foundation materials geologic conditions geologic investigation geologic profile geologic report 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 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 storage strata stratigraphic stratum stream channel subsurface exploration surface test holes test pits thickness tion turbed unconsolidated materials undisturbed samples Unified soil classification usually water table