Construction Begins on Mill Creek’s 35th Avenue

Construction Begins on Mill Creek’s 35th Avenue; Full Road Closure Set for July 2
Posted on 06/21/2018
An image of water over 35th Avenue SEThe long-anticipated reconstruction of 35th Avenue SE in Mill Creek began on June 18 by Harbor Pacific Contractors. The full roadway closure will begin in the early hours of June 29. The full roadway closure of 35th Avenue SE in Mill Creek for reconstruction has been moved to begin Monday, July 2, at 5 a.m.

“We had an opportunity to give the community one more weekend to use the roadway and we made the decision to keep it open as long as we could,” said Acting City Manager Greg Elwin.

The roadway will be closed between 141st Street SE and 144th Street SE for up several months. Traffic that normally utilizes 35th Avenue SE in Mill Creek will be detoured via 132nd Street SE and SR 527 (the Bothell-Everett Hwy). The City strongly discourages the use of side roads off 35th Avenue SE for unofficial detour routes, as these are residential neighborhoods not built for arterial traffic. The side roads should only be used by local access vehicles.

“Local access is intended for those people who live in one of the neighborhoods adjacent to 35th Avenue SE, including Highland Trails, North Pointe, Silver Crest, and Silver Glen,” said Gina Hortillosa, director of Public Works and Development Services.

“It may not be convenient to take the longer route,” said Elwin. “However, public safety is a priority for us. We’re asking people to be considerate of their neighbors and the kids playing in these residential areas by using the detour route.”

The construction is slated to be substantially complete and open to the public in December 2018. However, the final asphalt application may not occur until spring 2019.

Construction may occur between 7 a.m. and 9 p.m. Monday through Friday, or between 8 a.m. and 9 p.m. on weekends. Equipment is anticipated to run during normal working hours of 7 a.m. to 7 p.m. Monday through Friday for the majority of the project.

35th Avenue SE is a three-lane minor arterial in Mill Creek that carries approximately 15,000 vehicles per day. The road was widened by Snohomish County in 2003 by using lightweight fill on top of a large peat deposit. The road has been continually settling since annexation by the City in 2005.

One of the biggest areas of settlement is over the Penny Creek crossing between 144th Street SE and 141st Street SE, which also has the deepest deposit of peat material as a base. The water level in the surrounding wetlands has also increased due to several factors such as upstream development and downstream beaver activity. The rising water combined with a sinking roadway has resulted in several road closures over the past few years due to flooding.

The total cost is estimated at approximately $5,303,300. The State Department of Transportation office has included a $5.25 million funding package for this project by the City of Mill Creek. Snohomish County also provided a $50,000 small capital projects partnership grant.

For additional project information, visit