Inspection & preservation

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

Zero emission electric vehicle registrations in Washington

increased 192% between 2017 and 2021.

45 projects to improve freight rail structures and freight movement

were underway as of December 31, 2021.

Washington state leveraged $100,000 to secure $27 million

in funding for airport investments in Fiscal Year 2022.