Headwall

1 1 Each 112” x 75” x 40’ x 8-gauge, 3 X 1 corrugation, aluminum arch pipe fully welded inside and out to: 8’ x 9’ 6” x 200” thickness headwall, ¼” thick aluminum flanged joints with gasket, hot dipped galvanized bolts with nuts and washers. Two (2) each various height wing walls 4.5’ long. (INLET END). 18’ x 9.75’ x 200” thickness headwall, ¼” thick aluminum flanged joints with gasket, hot dipped galvanized bolts with nuts and washers. Two (2) each various height wing walls 4.5’ long. (OUTLET END). Aluminum stiffening rib bolted to soil side of wall. One (1) roll of TX-7 or TX-160 Tensar Geogrid Two (2) days onsite assistance during foundation prep, Assembly and Deadman installation during backfill.

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.