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ID-13: Grangeville toward Harpster

Resurfacing of 5.5 miles, combined with some soft spot repair, will improve the driving experience.

Work will not improve the Harpster Grade but will address the surface between Mount Idaho Grade Road and the top of the Harpster Grade at Dewey Saddle Road. More than 50 drains will also be replaced, and turnouts for mailboxes will be expanded.

Pause in June
due to cement shortage
Ends mid-August
One lane of alternating traffic
during the day
Contact us
May 2021

Work begins

Once work begins, a pilot car will guide one lane of traffic through the zone during daylight hours. The highway will open up to two lanes at night and on the weekends, but traffic will still be slowed by the gravel surface.

Read more


A cement shortage in mid-June will cause a month-long pause. Read more.

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ID-13: Mount Idaho to Harpster Grade

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