There are 101 bridges in the County inventory (this excludes private, city, forest service, and state bridges).
Current County Bridge Inventory (PDF), Bridge Inspection Photos from 1942
For Bridge Load Limits please contact our office.
During the bridge construction boom of the 1950s and 1960s, little emphasis
was placed on the safety inspection and maintenance of bridges. This changed
when the 2,235-foot Silver Bridge, at Point Pleasant, West Virginia collapsed
into the Ohio River on December 15th, 1967 killing 46 people.
This tragic event aroused national interest in the safety inspection and maintenance of bridges. In 1971, the US Congress and the Secretary of Transportation established the National Bridge Inspection Standards (NBIS).
The National Bridge Inspection Standards is a Federal regulation establishing requirements for bridge inspection procedures, frequency of inspections, qualifications of inspection personnel, inspection reports, and preparation and maintenance of a National Bridge Inventory (NBI). The NBIS apply to all structures of 20 feet or more in length located on public roads.
There are currently 87bridges on the National Bridge Inventory located in Tillamook County. These structures are inspected every two years by certified bridge inspectors. To satisfy the Federal regulations, the State is responsible for these inspections. The Oregon Department of Transportation contracts with engineering firms to make inspections and submit reports.
There are 14 bridges in Tillamook County that are not on the National Bridge Inventory. These are bridges with lengths of less than 20 feet. These Non-NBIS structures must also be inspected every two years by a certified bridge inspector and are inspected using NBIS standards. It is the responsibility of the local agencies to ensure that these bridges are inspected. Tillamook County generally opts to conduct inspections of its non-NBIS bridges at the same time that ODOT has the NBIS bridges inspected.
For More Information on bridges in general and throughout the state, please visit the ODOT website through our Related Links page. For a photograph of a private bridge over Bewley Creek that failed click here.
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Last Updated: Monday, October 21, 2013 09:07 AM