Transportation Structures Preservation Manual

Publication Number
M 23-11
Publication Version
M 23-11.01
Publication Date
Bridge & Structures Bridge Administration Section

The purpose of this document is to assign responsibilities for the inventory, inspection, rating, maintenance, and damage repair of the department’s transportation structures and for the analysis of their structural capacity to carry loads. Guidance for the department’s responsibilities in the inventory and inspection of local agency-owned bridges; and cooperative inspection, rating and maintenance of bridges between Washington and other states or agencies is also included.

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.