TeachMeFinance.com - explain Sill
Sill The term 'Sill' as it applies to the area of reclamation can be defined as ' A submerged structure across a river to control the water level upstream. The crest of a spillway. The horizontal gate seating, made of wood, stone, concrete, or metal at the invert of any opening or gap in a structure. Hence, the expressions: gate sill, stoplog sill'.
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