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May 27, 2016
US Highway 12 emergency repairs
Location: White Pass
General contractor: Granite Construction
Owner/developer: Washington State Department of Transportation
U.S. Highway 12 at White Pass was hit by a massive storm system on Dec. 7 last year. This three-day event produced precipitation exceeding historical levels for the month, overwhelming drainage structures and leading to failure of the roadway in three locations.
The Washington State Department of Transportation contacted Granite Construction on Dec. 9, and the company began repair work the next day.
U.S.12 had been closed to traffic because the roadway was unstable. Granite was contracted to stabilize the areas and open traffic to a single lane by Christmas. The deadline was placed to reassure holiday travelers and enable the White Pass Ski Area to conduct their seasonal operations.
Two of the work areas were repaired by Granite by using riprap to rebuild the slopes up to the roadway. The third was stabilized utilizing soil nails.
Other work included hot mix asphalt paving, culvert installation, guardrail, concrete barrier and traffic control. Work continued around the clock until U.S. 12 was reopened on Dec. 22, just 15 days after the rain hit.