Patent ID: 7559720

Claim:
A culvert and soil assembly for stream crossings and flow-through bridge abutments comprising: (a) a first separator fabric; (b) at least a first, a second and a third cylindrical culvert placed in parallel on the fabric adjacent to one another along their lengths; (c) a first pair of triangular cross-section blocks placed in upper and lower spaces between the first and the second culverts; (d) a second pair of triangular cross-section blocks placed in upper and lower spaces between the second and the third culverts; (e) a first fastener placed around the first and second culverts and the first pair of blocks for holding the first and second culverts and the first pair of blocks in position; (f) a second fastener placed around the second and third culverts and the second pair of blocks for holding the second and third culverts and the second pair of blocks in position; (g) a second separator fabric placed over the first, second and third culverts and the first and second pair of blocks; and (h) soil or other fill placed over the second fabric, the culverts, the blocks and the first separator fabric to create a road or crossing structure surface.