OLD 99
over PILCHUCK CREEK
2.0 N JCT SR 530, Snohomish County, Washington
Condition
PoorYear Built
1933
Daily Traffic
428
Length
181 ft
About This Bridge
OLD 99 carries traffic over PILCHUCK CREEK in Snohomish County, Washington. Built in 1933, this structure is 93 years old. The bridge features steel construction with a stringer/multi-beam or girder design.
The bridge is currently rated in poor condition based on federal inspection criteria. Its lowest component rating is 3 on the 0-9 federal scale. It is classified as structurally deficient, meaning one or more components have received a rating of 4 or below. This designation indicates significant deterioration that warrants attention, though the bridge remains safe for travel within its posted limits.
Condition Summary
Structurally Deficient
This bridge has one or more component ratings of 4 or below, indicating significant deterioration that requires attention. The bridge remains safe for travel but may have load restrictions.
Lowest Rating
Determines condition category
NBI condition ratings range from 0 (failed) to 9 (excellent). The overall condition category is determined by the lowest individual component rating.
Bridge Details
Construction
Dimensions
Limited Detail Available
This is a shorter bridge (181 ft). Detailed component-level inspection data, load ratings, traffic projections, and historical trend analysis are available for bridges 50 feet and longer. Basic condition and identification data is shown above from the National Bridge Inventory.
Location
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49.553056, -122.393889
Identification
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Data Source: Federal Highway Administration (FHWA) National Bridge Inventory 2024
Bridge inspection data is typically updated every 24 months. Conditions may have changed since the last inspection.
“Structurally deficient” does not mean a bridge is unsafe or likely to collapse. It indicates that one or more key structural elements are in poor or worse condition. Bridges are inspected regularly and may have load restrictions in place.
This data is for informational purposes only and should not be used for route clearance or vehicle weight decisions.