Active Bridge Design Manual Memorandums
Bridge design memorandums are issued as interim updates to the Bridge Design Manual (M 23-50). Active design memorandums supersede the contents of the Bridge Design Manual and are currently in force.
| Number | Date | Subject |
|---|---|---|
| 2024-03 | 4/19/2024 | Standard Plan Barrier and Moment Slab on Structures (PDF 221KB) |
| 2024-02 | 4/19/2024 | Buried Structure Standard Plan Implementation Updates (PDF 42MB) |
| 2023-03 | 12/20/2023 | Bridge Design Manual (LRFD) M 23-50.22, September 2022 (PDF 50KB) |
| 2023-04 | 12/20/2023 | WSDOT MSE Wall Support Abutment Bearing Limits (PDF 124KB) |
| 2023-05 | 12/20/2023 | WSDOT roadside safety hardware and barrier update (PDF 570KB) |
| 04-2022 | 08/20/2022 | Revisions to Bridge Design Manual M 23-50.21, June 2022 Publication (PDF 141KB) |
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.