Structure 36654 · Iron County, MO

Mo 49 S over Quarry RD

Carries Mo 49 S over Quarry RD, S 2 T 34 N R 2 W.

Overall conditionFair

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

How ratings work
Superstructuresets the rating5/9 · Fair
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT33 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 5/9 · sets the ratingSubstructure 8/9

33 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 deck arch.

Built198244 years old
Length33.5 ft10.2 m
Daily traffic1,645counted 2024
Last inspectedOctober 2023every 24 months

Location

StateMissouri
CountyIron
LocationS 2 T 34 N R 2 W
CarriesMo 49 S
CrossesQuarry RD
Coordinates37.68157, -91.12170

Physical Characteristics

MaterialSteel
DesignArch - Deck
Total Length33.5 ft (10.2 m)
Max Span33.5 ft (10.2 m)
Deck Width90.9 ft (27.7 m)
Deck Area282.5 sq m
Main Spans1
Year Built1982

Traffic

Avg Daily Traffic1,645 (2024)
Truck Traffic10%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number36654

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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