Sauk River Bridge Replacement
Darrington, WA (USA)
Surrounded by the Mt Baker National Forests, the Sauk River Bridge rests over water adorned with lush vegetation. The wild Sauk River is home to endangered species and in order to protect the surrounding inhabitants, the replacement bridge was powder coated after hot-dip galvanized (HDG). The duplexed coating provides the much needed corrosion protection, protecting both the structure and its environment.
When under construction, both the reinforcing steel in the bridge deck and the structural steel in the bridge truss were all galvanized. This choice ensured every piece of rebar inside the concrete received the same corrosion protection, as the bridge receives nearly continual condensation. The synergetic effect of duplex system ensures the Sauk River Bridge and the environment are preserved.
Details
Year Galvanized
2008
Sectors
Bridge & Highway
Duplex Systems
Environment
Temperate Marine
Location
Darrington, WA United States
Reasons for Galvanizing
Corrosion Performance
Team Members
Member Galvanizer(s)
Valmont Coatings – Pacific States Galvanizing
Wes Smith Bridge
Index, Washington
This 262 ft. (80 m) bridge spans the entire width of the Skykomis River in Index, Wash. Initially specified to have another corrosion prevention system, thanks to the marketing efforts of galvanizers, the specification was changed mid-way through the project. Unfortunately, the entire bridge could not be hot-dip galvanized. The four-corner sections were too large to be dipped, so they were metallized. To redesign the corners and redo the bridge loading and stress was not economically feasible. However, all parts able to be hot-dip galvanized at that point were, including all the reinforcing steel. This area receives a considerable amount of rain, snow, wind, ice, and moisture from the Skykomis River. Snohomish County was looking for the best corrosion prevention system available to withstand all these natural elements; hot-dip galvanizing was the best system. Additionally, galvanizing was able to support these claims with decades of research and documentation.
Details
Year Galvanized
1999
Sectors
Bridge & Highway
Environment
Rural
Location
Index, WA United States
Reasons for Galvanizing
Coating Durability
Components Galvanized
Understrcutre, arch and rebar
Tonnage/Size
Steel: 352
HDG: 352
Team Members
Project Members
Specifier
WA Public Works – Darrell Ash
Fabricator
Oregon Iron Works – Terry Dorn
Engineer
HNTB Engineers
Member Galvanizer(s)
Galvanizers Company