Patent ID: 6863472

Claim:
An assembly of revetments made wholly or predominantly from concrete and lining a streambed, comprising: a plurality of revetments, each including a substantially rectangular body having upper and lower surfaces, said upper surface having an upstream edge along first and second sides of said rectangular body and a downstream edge along third and fourth sides of said rectangular body, and a bevel in said upper surface along substantially the entirety of said first and second sides of said upstream edge, said upper surface being substantially flat without a bevel along said third and fourth sides; wherein said revetments are assembled in a plurality of rows, the revetments in each row have said first side adjacent said third side of an adjacent revetment in said row, and said third side adjacent said first side of another adjacent revetment in said row, the revetments of each row are offset relative to the revetments of adjacent rows, wherein said revetments substantially overlap two revetments of each adjacent row, and said revetments are positioned with their fourth side adjacent the second sides of two revetments of a downstream row, and the second side adjacent the fourth sides of two revetments of the adjacent upstream row.