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- Lower part of a structure that transmits loads directly to the soil. The excavated surface upon which a dam is placed.
Bureau of Reclamation - Cite This Source - This Definition
- Common excavation, Earth lining, Excavation, Exploit, Grubbing, Lift, Overexcavation, Overhaul, pass, Pay formation, Pipe trench, Shoring, Spoil, Swell, Unclassified excavation, Wastebank