Know before you go: Which roads typically close each year due to flooding?

Crews unloading sandbags.

Crews unloading sandbags.

The Snoqualmie Valley is most prone to flooding when heavy rain or snow melt occurs. This flooding causes roads to be closed – in some cases for long periods of time. Road Services has created a new webpage to provide detailed information about areas prone to flooding and how we respond. The new page features a wide variety of resources and flood information:

  • View a map and list of public county roads that typically flood in the winter
  • Learn how Road Services responds to severe weather and flooding
  • Find links to other flooding information sites
  • Learn about landslide risks
  • Findout why roads flood where they are built and why we can’t stop them from flooding
Tolt Hill Road, Snoqualmie River, November 2015.

Tolt Hill Road, Snoqualmie River, November 2015.

Road Services also offers a 24/7 Road Helpline to report roadside flooding and traffic safety issues. The 24/7 number is: 206-296-8100 or 1-800-527-6237 (1-800-KC-Roads). If you are caught in your home or car by rapidly rising waters, call 911 immediately. Do not walk or wade through flooded areas. Do not drive where water is over the road or around barricaded road signs.

You can also sign up for Road Alerts. Subscribers receive emails and text messages notifying them of significant road closures and hazards. You can receive all alerts or just messages for roads in specific areas of King County.