The westbound lane of state Route 18 will be closed over Tiger Mountain Summit so construction can repair the shoulder.

The road will be closed from 8 p.m. on March 6 through noon on March 10.

According to the Washignton State Department of Transportation’s blog, the soil underneath the sholder eroded after the flooding in early February. The shoulder has been coned off since the damage.

“To prevent any further damage, we need to close the westbound lane so crews have enough space to safely dig out saturated soil from under the damaged turnout near the shoulder,” the department said in the blog post. “When they reach solid ground, which we expect they’ll find about 10 feet down, the crews will place rock to fill and support the area, then repave it.”

The department said the closure will save the road from longterm closures that could come if the road continued to erode.

“We know this will be an inconvenience for people who rely on this important route between Snoqualmie Pass and south King County or Tacoma. This relatively quick restoration allows us to preserve the highway and avoid a major problem should more of the hill slide away from under the roadbed before we can fix it,” the department wrote. “That could cause a long-term closure, perhaps of both directions of SR 18 – something we all want to avoid.”