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• 21:39, 13 December 2022 Grichards talk contribs created page Piano Key Spillways (Created page with "__NOTOC__ Category:Spillway Control Structures ---- “A piano key (PK) weir is a recently developed alternative to traditional labyrinth weir designs that was developed specifically for smaller control structure footprint applications. Two main differences of PK weir designs, relative to traditional trapezoidal labyrinth weir designs are: (1) the PK weir has a simple rectangular crest layout (in plan view), essentially creating a labyrinth weir with α = 0 (rectangu...")