Standard Plans

Publication Number
M 21-01
Manual Manager
Bill Berens, 360-705-7256
Design Office, Engineering and Regional Operations Division

The manual contains standard engineering drawings used for road, bridge, and municipal construction.

8,683 animals crossed the Snoqualmie Pass East Project area

as recorded by WSDOT and partners in 2020 and 2021.

46% increase in Amtrak Cascades ridership to 251,000 passengers

in 2021 compared to 172,000 in 2020.

Nine wetland and stream mitigation sites across 32.7 acres added

to our monitoring program in 2021 to help offset climate change impacts.