Specifications include, but are not limited to: 601024 REINFORCED CONCRETE PIPE, 72", CLASS III LF 240 601025 REINFORCED CONCRETE PIPE, 78", CLASS III LF 240 601031 REINFORCED CONCRETE PIPE, 12" CLASS IV LF 320 601032 REINFORCED CONCRETE PIPE, 15", CLASS IV LF 320 601033 REINFORCED CONCRETE PIPE, 18", CLASS IV LF 320 601035 REINFORCED CONCRETE PIPE, 24", CLASS IV LF 320 601037 REINFORCED CONCRETE PIPE, 30", CLASS IV LF 320 601039 REINFORCED CONCRETE PIPE, 36", CLASS IV LF 320 601109 REINFORCED CONCRETE ELLIPTICAL PIPE, 43" X 68", CLASS III LF 320 601111 REINFORCED CONCRETE ELLIPTICAL PIPE, 53" X 83", CLASS III LF 320 601141 REINFORCED CONCRETE FLARED END SECTION, 15" EACH 5 601146 REINFORCED CONCRETE FLARED END SECTION, 30" EACH 5 601219 CORRUGATED POLYETHYLENE PIPE, TYPE S, 12" LF 320 601220 CORRUGATED POLYETHYLENE PIPE, TYPE S, 15" LF 320 601221 CORRUGATED POLYETHYLENE PIPE, TYPE S, 18" LF 320 601223 CORRUGATED POLYETHYLENE PIPE, TYPE S, 24" LF 320 601225 CORRUGATED POLYETHYLENE PIPE, TYPE S, 36" LF 320