Structure 20257 012200203 · Linn County, OR

Tangent DR over Calapooia River

Carries Tangent DR over Calapooia River, 020 Mi W HWY 99e.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating6/9 · Satisfactory
Substructure8/9 · Very Good
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT121 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 6/9 · sets the ratingSubstructure 8/9

121 ft end to end. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a box-beam bridge.

Built200818 years old
Length121.1 ft36.9 m
Daily traffic469counted 2021
Last inspectedOctober 2024every 24 months

Location

StateOregon
CountyLinn
Location020 Mi W HWY 99e
CarriesTangent DR
CrossesCalapooia River
Coordinates44.53341, -123.14409

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length121.1 ft (36.9 m)
Max Span121.1 ft (36.9 m)
Deck Width32.2 ft (9.8 m)
Deck Area361.6 sq m
Main Spans1
Year Built2008

Traffic

Avg Daily Traffic469 (2021)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number20257 012200203

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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