Structure 550 · Cape Girardeau County, MO

Mo 177 S over Indian CR

Carries Mo 177 S over Indian CR, S 8 T 32 N R 14 E.

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 overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT233 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

233 ft end to end, longest span 75 ft: about 3 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.

Built1961rebuilt 2009
Length232.9 ft71 m
Daily traffic1,928counted 2024
Last inspectedNovember 2023every 24 months

Location

StateMissouri
CountyCape Girardeau
LocationS 8 T 32 N R 14 E
CarriesMo 177 S
CrossesIndian CR
Coordinates37.47269, -89.51359

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length232.9 ft (71 m)
Max Span75.1 ft (22.9 m)
Deck Width28.5 ft (8.7 m)
Deck Area617.7 sq m
Main Spans3
Year Built1961 (reconstructed 2009)

Traffic

Avg Daily Traffic1,928 (2024)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number550

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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