Centennial Trail Culvert Repairs

Wade Road to Hilltop Road:

Construction Notice: A culvert repair and replacement construction project is slated for the Centennial Trail between Wade Road and Hilltop Road during summer 2020. The project will require  approximately 1-mile stretch of trail to be closed for several weeks. 

Note: Wade Road is approximately 1/2-mile south of the Armar Trailhead and Hilltop Road is located 1 mile south of Wade Road.


The Centennial Trail between Wade Road and Hilltop Road  will be closed for several weeks during a portion of the construction in summer 2020 when 14 to 22-foot deep excavations (openings in the trail) are scheduled. These deep excavations are for the purpose of replacing a failed 12-inch culvert with a new 18-inch culvert and a 36-inch culvert with a required 9-foot diameter fish passable culvert. Additional culvert repairs during that time will require partial closures (one lane and equestrian trail) with flaggers and signage. 

Update 9/17/20: 

More Info Trail SignageWe have been working with a very good contractor on this project that has been working hard to get this trail opened as soon as possible. The 2 fish culverts are being replaced due to 2 sinkholes to allow fish passage for Otter Creek. Trail reopening is scheduled for late September (just need to do a final repaving), with replanting along the trail scheduled for Sept/Oct.

There is no detour provided. Due to high traffic and narrow lanes, 67th Avenue is not recommended. There is no trail access off 108th Street. We recommend exploring a different area of the trail farther north or south to stay safe and off busy roads.

We are sorry for the inconvenience but are working hard to get the trail section back up and running for you!


In January 2017 a culvert conveying a small un-named creek under the Centennial Trail collapsed causing a sinkhole extending from the trail surface down to the pipe. The hole has been temporarily filled with gravel and the area secured with fencing closing one lane of the trail along with equestrian trail section. Several other culverts between Wade Road and Hilltop Road were identified during design as failed (collapsed or condition meriting more than maintenance) or in need of repair and maintenance. The County anticipated construction in summer 2019 but design, permit delays and the fish window necessitate pushing the project out to 2020.

For More Information Contact:

Logan Daniels, P.E., Parks Engineer

Office: 425-388-6619 Cell: 425-508-2844

Email Logan Daniels