Corrugated steel box culverts approach the rectangular shape of a low wide box. This is made possible by the addition of special reinforcing elements to standard structural plates. The resulting ...

OLYMPIC NATIONAL FOREST — About five miles south of milepost 212 on U.S. Highway 101, the finishing touches are being put on ...

The road was closed after heavy rains caused the failure of a 36-inch diameter corrugated metal culvert that carried Coulter ...