Structure 33427 · Scott County, MO

Mo 91 S over Drain Dtch No 1

Carries Mo 91 S over Drain Dtch No 1, S 33 T 28 N R 12 E.

Overall conditionGood

Set by its lowest-rated component: Substructure at 8 of 9.

How ratings work
Deck9/9 · Excellent
Superstructure9/9 · Excellent
Substructuresets the rating8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT103 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 9/9Substructure 8/9 · sets the rating

103 ft end to end. 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 box-beam bridge.

Built201115 years old
Length103.0 ft31.4 m
Daily traffic667counted 2024
Last inspectedJanuary 2025every 24 months

Location

StateMissouri
CountyScott
LocationS 33 T 28 N R 12 E
CarriesMo 91 S
CrossesDrain Dtch No 1
Coordinates37.03834, -89.73584

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length103.0 ft (31.4 m)
Max Span100.1 ft (30.5 m)
Deck Width25.9 ft (7.9 m)
Deck Area248.1 sq m
Main Spans1
Year Built2011

Traffic

Avg Daily Traffic667 (2024)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number33427

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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