Tangent Dr over Calapooia River

Linn County, Oregon · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

• Tangent Dr over Calapooia River in Linn County, Oregon, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
• It was built in 2008, making it 17 years old at the 2025 inventory.
• It carries about 469 vehicles a day (traffic count year 2021).
• Its listed owner is the county highway agency.
• It is one of 363 of the 564 inventoried bridges in Linn County rated fair (64.4%); 95 (16.8%) are rated poor.
• Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
• It was rated good in the 2024 inventory and is now fair (superstructure 7 to 6, deck 7 to 8).
• Its most recent inspection on record is dated October 2024, on a 24-month routine inspection cycle.
• A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

View this bridge on a map → (44.53341, -123.14409)

Component ratings

Bridge details

Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.

Busiest bridges in Linn County

All bridges nearby: Linn County, OR bridge conditions · every bridge in Linn County · Oregon bridges.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.