ABERDEEN — Always mixing and tweaking, industrial engineers continue working to develop the right concrete recipe and process to build the strongest pontoons possible for the upcoming Highway 520 ...
The Washington State Dept. of Transportation is creating a list of best construction practices for floating bridges, based on results of tests conducted on a pontoon built at one-sixth the typical ...
Despite the discovery of cracks in the first batch of pontoons produced for a new Highway 520 floating bridge, state Secretary of Transportation Paula Hammond said Friday she expects all six to be ...
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