Patent ID: 7758749

Claim:
A synthetic turf sports field comprising: (a) a synthetic turf playing surface disposed on a subgrade, said synthetic turf playing surface including an infill; (b) a substrate disposed between said synthetic turf playing surface and said subgrade, said substrate intended to facilitate draining and including a fine aggregate layer disposed directly underneath said synthetic turf playing surface and a coarse aggregate layer disposed beneath said fine aggregate layer; and (c) a drainage system coupled within said substrate and fluidically coupled to said synthetic turf playing surface for removing runoff fluid from said synthetic turf playing surface and preventing runoff fluid from draining to a fluid water table, said drainage system comprising: at least one perforated drain coupled within said substrate, a plurality of drain tiles contained within said substrate beneath said synthetic turf playing surface, each of said plurality of drain tiles fluidically coupled to at least one of said at least one perforated drain; a perimeter drain fluidically coupled to said at least one perforated drain, said perimeter drain fluidically coupled to a sewer system at an outlet end, said perimeter drain located adjacent a perimeter of said synthetic turf playing surface; and an impermeable fabric disposed beneath said at least one perforated drain, said plurality of drain tiles, and said perimeter drain to direct water thereto, said impermeable fabric disposed within said substrate and above said subgrade to prevent said runoff water from contacting said water table, a filter coupled within said outlet end of said perimeter drain, said filter substantially preventing contaminant material contained in said runoff water from entering said sewer system.