Structure 789 · Buchanan County, MO

US 169 S over Is 29

Carries US 169 S over Is 29, S 26 T 58 N R 35 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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT301 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

301 ft end to end, longest span 84 ft: about 4 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.

Built1962rebuilt 2009
Length300.9 ft91.7 m
Daily traffic6,230counted 2024
Last inspectedJuly 2024every 24 months

Location

StateMissouri
CountyBuchanan
LocationS 26 T 58 N R 35 W
CarriesUS 169 S
CrossesIs 29
Coordinates39.81510, -94.80355

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length300.9 ft (91.7 m)
Max Span84.0 ft (25.6 m)
Deck Width60.4 ft (18.4 m)
Deck Area1687.3 sq m
Main Spans4
Year Built1962 (reconstructed 2009)

Traffic

Avg Daily Traffic6,230 (2024)
Truck Traffic14%
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number789

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.

Nearby Bridges