Structure 1308 · Clay County, MO

Rp Us169n To Is29n over US 169

Carries Rp Us169n To Is29n over US 169, S 34 T 51 N R 33 W.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT388 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

388 ft end to end, longest span 90 ft: about 5 semi-trucks nose to tail. 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.

Built1965rebuilt 1989
Length388.1 ft118.3 m
Daily traffic13,312counted 2024
Last inspectedSeptember 2024every 24 months

Location

StateMissouri
CountyClay
LocationS 34 T 51 N R 33 W
CarriesRp Us169n To Is29n
CrossesUS 169
Coordinates39.18345, -94.59304

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Single/Spread
Total Length388.1 ft (118.3 m)
Max Span89.9 ft (27.4 m)
Deck Width26.6 ft (8.1 m)
Deck Area958.2 sq m
Main Spans5
Year Built1965 (reconstructed 1989)

Traffic

Avg Daily Traffic13,312 (2024)
Truck Traffic3%
Lanes On Bridge1
Lanes Under Bridge4

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number1308

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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