The road into Denali National Park could be closed next summer at mile 43, the National Park Service said this week. That’s just east of a where portion of the road traversing a slope, is sloughing.
The long problematic section is in the Polychrome Bluffs, at a spot known as “Pretty Rocks,” where warmer temperatures and heavy summer rains have increased melting of permafrost, and caused landslides.
Denali National Park spokesperson G.W. Hitchcock said the 300 foot section of road had slumped 7 feet from grade as of early November.
Hitchcock said the park is looking at getting a road crew to the area in February to begin repairs, while soils are more frozen. Backfilling with gravel has been employed to restore the road grade in past years, but Hitchcock said that’s challenged by the increasing depth of the slump.
Hitchcock said extent of next summer’s road closures will be unclear until crews begin work at Pretty Rocks. It’s just one of numerous places where unstable soils threaten Park Road. He said longer term solutions, including building bridges, or re-routing the road, are being evaluated.
According to a Park Service press release mile 43 is a good closure point because there’s room to turn around traffic, including shuttle and tour buses. Road closures at that milepost would cut off vehicle access to points west along the 92 mile Park Road, including the Eielson Visitor center at mile 66, and Kantishna and Wonder Lake at miles 85 and beyond.
Hitchcock said the park service is working with people who own property along the road west of the potential closure point, as well as the park bus contractor Doyon Aramark.
