This is the only bridge that spans the Yukon River in Alaska. It carries both the Dalton Highway and the Alaska Pipeline, and was a vital link in pipeline construction. Special engineering allows the length of the bridge to change by almost 2 feet between the summer and winter months. The large temperature differences must also be accommodated by the pipeline itself all along its length from Prudhoe Bay/Arctic Ocean in the north to Valdez Marine Terminal on the south-central coast of Alaska.