Headwall

1 1 Each 60 LF of 66” diameter, 12 gauge, 3 X 1 corrugation, aluminum pipe, fully welded to a 24’-9” wide X 10’-0” high, 0.150” metal thickness, aluminum structural plate headwall on inlet end and a 27’-0” wide X 11’8” high, 0.150” metal thickness, aluminum structural plate headwall on outlet end per attached drawing. Fully welded 0.250” thick aluminum flanged joints with neoprene gaskets are required for all joints with neoprene gaskets are required for all joints. Includes one (1) roll of TX Geogrid, all headwall cap, wall support members and tieback rods with deadman anchor plates. A manufacturer’s field representative is to be on site to assist with assembly of flanged joints and backfill of structure for three (3) days. Aluminum stiffening rib bolted to soil side of wall. Fully welded aluminum structural plate headwall.

Division 31 -	Earthwork, Erosion and Sedimentation Controls.
Division 33 -	Utilities, Storm Drainage Utilities, Ponds and Reservoirs.
Division 35 -	Waterway and Marine Construction, Shoreline Protection, Waterway Construction and Equipment.