Article Details Pile Design & Construction on Seward Highway Project 

This recent issue of PileDriver Magazine features an article co-authored by Shannon & Wilson's Kyle Brennan and David Hemstreet from the Alaska Department of Transportation & Public Facilities.

The article, “Pile Design and Construction in Liquefiable Soils” examines work performed on Phase II of the Seward Highway Mile Post 75 to 90 project, which involved improving the alignment and replacing five bridges in one of the most seismically active areas of the United States.

Mile Post 75 to 90 runs along the flat, expansive estuaries at the head of Turnagain Arm along the Seward Highway, south of Girdwood, Alaska. The project corridor traverses transitional shoreline topography from steep slopes of the Chugach Mountains and tidal mudflats of Turnagain Arm. The replacement bridge structures are all two-lane highway bridges varying from two to five spans. The longest bridge structure is 20-mile Creek, a five-span structure measuring 650 feet long.