Headwall

1 1 Each The total length of the structure shall be 50 LF of 66” diameter, 10 gauge, 3” x 1” corrugation, aluminum pipe fully welded on a 7 degree angle skew to 33’-3” wide x 14’-10” high, 0.200” metal thickness aluminum structural plate headwall on inlet end and 33’-3” wide x 14’- 10” high, 0.200” metal thickness aluminum structural plate headwall on outlet end per attached drawing. The 66” diameter pipe is to have 0.250 thick aluminum flanged joints fully welded to the ends of the pipe and shall include neoprene gasket and bolts and nuts. Includes 1 roll of TX Geogrid, all headwall cap, wall support members and tieback rods with deadman anchor plates, PE stamped drawings and headwall calculations and manufacture field representative on-site to assist with installation of flanged joints and backfill of pipe and headwalls. Aluminum structural plate headwalls on both inlet and outletside of the pipe are designed for surcharge. Reference attached drawing. All structure materials and incidentals shall be designed and fabricated to meet or exceed AASHTO material requirements for aluminum box culvert. AASHTO HL-93 loading and North Carolina Department of Transportation Standard Specifications. The headwalls shall be designed for surcharge. Manufacture field representative onsite to assist with installation of flanged joints and backfill of pipe and headwalls. The purchase of this structure shall include but not limited to all items specified in this specification, the delivery of the structure and any incidentals required for the proper assembly of the structure.

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.