Our Projects Now Offering HDPE Culvert July 29, 2015 HDPE Culvert 36″ HDPE x 6 Meter Culvert 30″ HDPE x 6 Meter Culvert 24″ HDPE x 6 Meter Culvert 18″ HDPE x 6 Meter Culvert 12″ HDPE x 6 Meter Culvert 4″ Weeping Tile with Sock Manufactured in Accordance with: CSA B182.8-11 CSA B182.6-11 ASTM D3350