56’-0” Linear Feet of 66” Diameter, 8GA., 3”x1” Corrugated Aluminum Pipe with ¼” Thick Aluminum Flanged Joints Fully Welded Inside and Out to Ends of the Pipe with 38 Each – 7/8” Diameter Holes, ¾” Diameter Bolts and 3/8” Thick Neoprene Gaskets, with Two (2) Each 15 Degree In-Line Vertical Elbows, and One (1) – Aluminum x 1’-0” High Aluminum Baffle Fully Welded on a 90 Degree to a Pre-Built 24’-0” Wide x 10’- 0” High, 0.150” Metal Thickness, Aluminum Structural Plate Headwall on Inlet End and a Pre-Built 37’-6” Wide x 14’-0” High, 0.250” Metal Thickness, Aluminum Structural Plate Headwall on Outlet End Per Attached Drawing. two (2) – 18”x15”x10’ Long Galvanized Wire Forms with Six (6) Struts Per Form Fill heights over structure • Minimum cover over pipe = 1’- 6”’ • Maximum cover over pipe = 72’-0”
