California Today

California's Highway 101 at Last Chance Grade Sliding Into the Sea, $2.5 Billion Tunnel Planned

18 June 2026 06:45

A critical stretch of Highway 101 in Del Norte County is slowly sliding into the Pacific Ocean, prompting Caltrans to propose a $2.5 billion tunnel. The project recently cleared a major environmental review milestone.

- The 1.1-mile tunnel would bypass the most unstable landslide areas on Last Chance Grade. - The only alternative route when the highway closes is a 449-mile, eight-hour detour.

- Construction could begin by 2031, with the tunnel opening by 2038. - The project will require the removal of 16 old-growth redwood trees.

The long-awaited plan offers hope for residents who rely on this critical route for school, medical care, and daily life.

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Crescent CityKlamathtransportroadsinfrastructureenvironment