The Problem:
Install a new 120" diameter culvert to replace a failing corrugated pipe that carried an environmentally sensitive creek under a forest service roadway 45 feet above in a remote location 13 miles inside the forest. In addition, the creek was an active salmon spawning area and the installation had to be accomplished during a specific five-week window.

The Solution:
By using Permalok Steel Pipe, the contractor was able to install the entire drive in only eight days and complete the installation within a deviation of only 1/4" horizontally and 4-1/2" vertically – a record for this size pipe.

The contractor estimated that it would have taken three to four days to weld each section, as well as additional time to inspect and repair each weld, making installation of the project in the five-week window nearly impossible.