Structure 3797 · Linn County, MO

US 36 E over Big Turkey CR Ovrf

Carries US 36 E over Big Turkey CR Ovrf, S 9 T 57 N R 20 W.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT85 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

85 ft end to end, longest span 29 ft. Lengths and the car 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 tee-beam bridge.

Built1988rebuilt 2006
Length85.0 ft25.9 m
Daily traffic5,388counted 2024
Last inspectedSeptember 2024every 24 months

Location

StateMissouri
CountyLinn
LocationS 9 T 57 N R 20 W
CarriesUS 36 E
CrossesBig Turkey CR Ovrf
Coordinates39.77860, -93.14953

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignTee Beam
Total Length85.0 ft (25.9 m)
Max Span28.5 ft (8.7 m)
Deck Width41.3 ft (12.6 m)
Deck Area326.3 sq m
Main Spans3
Year Built1988 (reconstructed 2006)

Traffic

Avg Daily Traffic5,388 (2024)
Truck Traffic41%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number3797

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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