Structure 6501 · Clay County, MO

US 169 S over Cst NW Cookingham DR

Carries US 169 S over Cst NW Cookingham DR, S 22 T 52 N R 33 W.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT157 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

157 ft end to end, longest span 67 ft: about 2 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 multi-beam bridge.

Built1956rebuilt 1981
Length157.2 ft47.9 m
Daily traffic10,075counted 2024
Last inspectedSeptember 2024every 24 months

Location

StateMissouri
CountyClay
LocationS 22 T 52 N R 33 W
CarriesUS 169 S
CrossesCst NW Cookingham DR
Coordinates39.30384, -94.58481

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length157.2 ft (47.9 m)
Max Span66.9 ft (20.4 m)
Deck Width50.9 ft (15.5 m)
Deck Area742.5 sq m
Main Spans3
Year Built1956 (reconstructed 1981)

Traffic

Avg Daily Traffic10,075 (2024)
Truck Traffic4%
Lanes On Bridge3
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 Number6501

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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