From coast to coast LONG SPAN Bridge & Culvert (LSBC) provides America’s civil engineering and land development community with the most economical and versatile bridge and culvert systems in the industry.  LONG SPAN can provide the complete engineering design, manufacture and assembly of these bridges for applications such as stream and wetland crossings, vehicle and pedestrian underpasses, fish and wildlife passages and golf and ski tunnels.  Manufactured from galvanized steel or aluminum structural plate with spans over 50 feet our range of shapes includes low and high profile arches, ellipses, box culverts, pipe-arches and conventional pre-fabricated beam bridges.