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.

166,800 electric vehicle

registrations in Washington in 2023, up from 114,600 in 2022.

87 wetland compensation sites

actively monitored on 918 acres in 2023.

25,000 safe animal crossings

in the Snoqualmie Pass East Project area since 2014.