Inspection & preservation for bridges & structures

Find information for inspecting and managing bridges and structures.

Bridge Inspection Manual

Specific guidance and technical details for bridge inspections are discussed in the Bridge Inspection Manual (M 36-64).

Bridge List

All structures for which the department has a maintenance responsibility is provided in the Bridge List (M 23-09).

Ferry Terminal Inspection Procedure Manual

Procedures for conducting structural inspections of ferry terminal facilities are provided in Ferry Terminal Inspection Procedure Manual (M 3105.05).

Transportation Structures Preservation Manual

Responsibilities for the inventory, inspection, rating, maintenance, damage repair and analysis of load carrying capacity of the transportation structures are provided in the Transportation Structures Preservation Manual (M23-11).

See all manuals and standards

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.