Related Publications
Snow and Ice Program (.pdf, 394kb)
The Snow and Ice Program is WSDOT’s strategy to maintain the state highways for safe winter driving. This plan aids in the prevention of snow and ice buildup on the roadway and provides for the removal of snow and ice from the roadway when inclement weather arrives.
A Season of Innovation (2005-2006) (.pdf,.84mb)
A summary of the 2006 winter season and the challenges it presented.
Snoqualmie Pass
WSDOT and the Washington State Patrol (WSP) hosted a public meeting on November 14, 2006 to discuss winter operation methods, challenges, and an innovative approach to keeping Snoqualmie Pass open.
Mountain Pass Highway Opening and Closing dates
Historical opening and closing dates for North Cascades, Cayuse and Chinook Pass.