A 475-foot bridge — expected to cost $100 million — will span a melting rock glacier in Denali National Park's Polychrome Pass, which has closed the park road near its halfway point since 2021.
A computer generated image of the bridge to be built over the landslide at mile 45 of the Denali National Park Road.
“The discovery of more clay than was anticipated on the west side of the project,” she said. “Originally it looked like it was going to be 30,000 cubic yards of clay that was going to be excavated, and now it looks like it’s going to be 80,000 cubic yards, and that’s a significant change.” “They probably had no idea they were building a road across a rock glacier,” he said. “It was completely inactive back then and it wasn’t really a problem until 2016, and so 1930 until 2016, it was a great road and just a little bit of climate warming that’s occurred in that era, along with the disturbance of creating a cut through here, really woke up this rock glacier.”“Just a massive amount of engineering and detail and thought goes into this,” he said.
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