US 97 Blewett Pass will be closed in both directions to ALL traffic from 9 PM Sunday, September 9th to 9 AM on Friday, September 14th to replace 3 culverts under the highway between MP 157.6 and MP 169.0.
Two box culverts will be installed about 1.5 miles and 4.5 miles north of the summit. As part of a separate contract, a third box culvert will be installed near the Swauk Creek campground.
The culvert replacements will all be done at the same time to minimize impacts to traffic and recreation. In addition to the full closure, the two projects may require intermittent weekday single lane closures throughout the month of September.
The current Mill culvert on Swauk Creek is a barrier to salmon and resident trout due to its size and orientation. The culverts on the north side of Blewett Pass need to be replaced because they are undersized and have a history of plugging with debris during storms, leading to washouts along the highway.
• Southern limit: MP 157.60, Between Mineral Springs and USFS #9714 – Iron Creek Rd
o 8 miles north of US 97/SR 970 junction (Lauderdale Junction), 5 miles north of Liberty.
• Northern limit: MP 169.00, Just below Five Mile Creek Rd.
o 5 miles north of Blewett Pass Summit, 9 miles south of Ingalls Creek Rd, 16 miles south of US 97/US 2 interchange (“Big Y”).
• Forest Service roads that have outlets within the work area will be barricaded at:
o USFS 7320 – Old Blewett Rd at Swauk Meadow (MP 159.23)
o USFS 9711 – Hurley Creek Rd at Swauk Meadow (MP 159.27)
o USFS 7324 – Wenatchee Crest Trail at Summit trailhead (MP 163.92)
o USFS 9716 – Swauk Discovery Trail at Summit trailhead (MP 163.89)
For more information & updates go to https://www.wsdot.wa.gov/projects/us97/blewett-pass/home