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356th Drive SE new vehicle weight limits.
March 18, 2020 - New vehicle weight limit increases to 15 tons during dry weather.

Summary

King County Road Services is closely monitoring ground movement on 356th Drive SE near Fall City, where a slow-moving slide is taking place under the roadway.

On February 10, Road Services, in partnership with the Office of Emergency Management, issued a voluntary evacuation message to residents who would be cut off if conditions worsen and the road washes out. The county does not expect the slide to affect State Route 202.

Status update

Friday, June 5, 2020

Construction repairs update

Soil testing analysis is complete. Plans are being developed to repair and replace the damaged section of 356th Drive SE in fall 2020. The repairs will take approximately three months and may require intermittent, temporary full road closures during construction.

King County is also working on a plan to provide an alternative access road for the community when the main road is closed for construction. More details about the repairs, the alternative access road and construction impacts will be made available at least two months in advance.

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For road project questions, contact Broch Bender by email or call 206-263-1189. For all other questions, contact the 24/7 Road Helpline at 206-477-8100, or 800-527-6237. If it's an emergency, please contact 911.

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356th Drive SE.
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Frequently-asked questions

King County intends to make long-lasting repairs to help prevent the road from sliding in the future. We will stabilize the roadway by reinforcing the hillside below the road with a support wall. We also will stabilize the hillside above the road by installing a drainage trench to redirect the water away from the roadway.
Plans are being developed to repair and replace the damaged section of 356th Drive SE in fall 2020. The repairs will take approximately three months and may require intermittent, temporary full road closures during construction.
Installing an underground support wall and trenching system takes more time than simply repaving the road. The work also will likely require temporary road closures to allow crews room to complete the work.
Road engineers need time to design the repairs, hire a contractor and acquire the necessary easements, permits and materials to do the work. Often times projects like this one can take up to one year before construction begins. We are working as quickly as possible to speed up the process and begin work as soon as we can.
Our goal is to complete the repairs by the end of the year or as late as January 2021.
We will require our contractor and workers to use a rainwater control system during construction so that construction work may continue rain or shine.
Our goal is to keep the road open as much as possible, however construction work may require intermittent full or partial road closures.
We are working on a plan to provide alternative in and out access to residents. The road would be a primitive access road, and would not be a traditional, paved King County road. More details will be shared with the community at least two months prior to the start of road construction repairs on 356th Drive SE.
This project restores function to the existing road and does not include widening the roadway. The County is unable to widen the road due to the potential impact to environmentally sensitive areas adjacent to the roadway.
King County will host an online community meeting this summer to discuss our timeline, and what to expect during construction. Please fill out our community contact information form to receive additional details.
A changeable weight limit sign will be posted at the slide area. Road crews will adjust the sign to display either the five-ton or 15-ton limit. Road Services will also update this website and send a notification to the project email distribution list when the vehicle weight limit is decreased to five tons or increased to 15 tons.
Increasing the vehicle weight limit to 15 tons allows heavier service delivery trucks to access residences.
Soil experts have determined the road can handle vehicles weighing up to 15 tons when the soil beneath the road is dry (having absorbed less than one inch of precipitation). For safety, the weight limit will change back to 5 tons during wet weather and for the 48 hours after rain stops.
The weight restriction is in place to prevent the road from sliding—or failing completely. King County may remove the 15-ton (dry weather only) limit if slide movement increases during use by heavier vehicles.

Garbage service
Garbage service remains up to residents to self-haul to collection sites because of the prohibitive weight of the trucks. The two sites nearby are located in Factoria and Cedar Falls:

  • Factoria
    13800 SE 32nd Street
    Bellevue, WA 98005
    Monday-Friday: 6:30 a.m. – 4 p.m.
    Saturday & Sunday: 8:30 a.m. – 5:30 p.m.

  • Cedar Falls Drop Box
    16925 Cedar Falls Road SE
    North Bend, WA 98045
    Telephone: 206-477-4466 or 800-325-6165 x 74466
    TTY relay: 711 Fax: 206-296-0197
    Monday, Wednesday, Friday, Saturday & Sunday: 9 a.m. – 5 p.m. (closed Tuesday & Thursday)

Recycling service
Recycling service also remains up to residents to self-haul to collection sites. Self-haul recycling at King County transfer stations is free! Please note one key difference from recycling in your curbside bins at home: separate clean corrugated cardboard boxes from the rest of your recyclables. Other regular recyclable material can be placed in the container labeled “Recyclable Materials” at all transfer stations.

  • Corrugated cardboard must be empty and flattened. Please no Styrofoam, plastic film, or packing peanuts.
  • Accepted recyclable materials include the below. As with curbside bins, recyclable materials must be empty, clean, and dry. Keep items loose – do not bag recycling, and no plastic bags please.
    • Paper, including office paper, junk mail, envelopes, newspapers, magazines, catalogs, paperboard food boxes (like cereal and pasta boxes)
    • Plastic bottles, jugs, tubs, cartons, cups, and other plastic containers, including large lids (3” or more)
    • Glass bottles and jars
    • Metal cans

Find a guide to all County transfer stations (including what materials are accepted and how to prepare them) online at the following links:

Yes, the County has developed an evacuation route through private property. We will activate this route if the slide worsens to the point where we must close the road to traffic.
The County will provide as much notice as possible in advance of an emergency road closure but may need to respond quickly to changing conditions.
It is unlikely we will need to activate the evacuation route. This emergency evacuation route is in place purely as a back-up should the slide worsen to the point where we must close the road.
The County is monitoring the road’s condition around the clock. If the slide worsens to the point where road engineers believe the safety of the road is in danger, the road will close to all traffic. One way to reduce the chance of the slide worsening is to obey the posted weight limit of 15 tons in dry weather and 5 tons in rainy, wet conditions.
If the road is completely closed, County staff will notify residents using a variety of outreach tools, including a reverse 911 notification, open the evacuation route, and put up signs showing the way to and along the route. County staff will be available on site to provide information. Please note the following:

a. The evacuation route would be open for 72 hours. It would not be possible to access the neighborhood after the 72-hour time period.
b. The route uses primitive dirt and gravel roads across private lands.
c. Livestock trailers will be allowed on the access route to evacuate animals.
d. Residents may be allowed to return to evacuate additional belongings during the 72-hour window if conditions allow.
e. Vehicles taller than 13’ or heavier than 21 tons will not be allowed on the evacuation route.
a. Providing their own transportation
b. Arranging for a location to board animals
c. Arranging for a place to stay
Evacuation is not mandatory, however if the road closes, residents will not be able to travel to and from the area after the 72-hour evacuation period.
356th Drive SE provides the only access for some 75 homes. The road is currently open but restricted to one lane north of the 4000 block. The ground under the roadway is moving slowly. Heavy rainfall could accelerate the slide and wash out the road.
Residents who live north of the 4000 block on 356th Drive SE are encouraged to leave the area. Those who live or work south of the 4000 block are not affected at this time.
Residents should consider leaving the area as soon as possible. If road conditions worsen and the road is closed or becomes inaccessible, there may not be another consistent way in or out of the area.

Map

Map.
356th Drive SE is restricted to one lane from the 4000 block north to the end of the road. - larger view PDF 412KB

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Photos

For more information

For information about road conditions on 356th Drive SE, sign up for updates by clicking on the red letter icon on the right side of the page.

To report maintenance and traffic safety issues on this road, contact the 24/7 Road Helpline at 206-477-8100, or 800-527-6237. If it’s an emergency, please contact 911.

For emergency preparedness information, please visit the King County Office of Emergency Management at www.kcemergency.com or call 206-296-3830.

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