Interstate 40 Gorge Repairs Face Increased Costs, Delays

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Interstate 40 Gorge Repairs Face Increased Costs, Delays

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Reconstruction efforts on Interstate 40 through the Pigeon River Gorge have encountered significant cost increases and timeline extensions. The current estimated cost for the project stands at approximately $2.8 billion, a substantial rise from an earlier estimate of about $2 billion in early 2026. This makes it the largest reconstruction project in N.C. Department of Transportation history.

The revised estimates are largely due to new geotechnical information revealing that bedrock is deeper than initially anticipated in some sections of the 5-mile worksite. Samples taken at river elevation showed that bedrock can be more than 50 feet below the surface, requiring longer steel piles and more complex drilling.

Hurricane Helene, which occurred on September 27, 2024, caused extensive damage to a five-mile stretch of I-40 in the Pigeon River Gorge, where the interstate is bordered by steep mountainsides and the Pigeon River. The severe flooding from the Pigeon River scoured the eastbound embankment, washing away sections of the interstate.

N.C. Transportation Secretary Daniel Johnson stated that this is the most complex reconstruction the NCDOT has ever undertaken. The project aims to create a more resilient interstate, designed to withstand hydraulic forces similar to those exerted by the Pigeon River during Hurricane Helene. The reconstruction involves the use of roller-compacted concrete walls and interlocking pipe pile walls. While the NCDOT aims to restore four lanes of traffic by late 2029, they are continuously evaluating opportunities to accelerate this timeline.

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