US Bridges

Mo 51 S over Bois Brule CR

Good

Perry County, Missouri · S 118 T 36 N R 11 E · Structure no. 4761

Built
1958
67 years old, rebuilt 2009
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
229 ft
3 main spans
Daily traffic
3,746
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 51 S over Bois Brule CR is a steel continuous stringer/multi-beam or girder carrying Mo 51 S over Bois Brule CR in Perry County, Missouri. It was built in 1958 and reconstructed in 2009, so it is 67 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,746 vehicles a day, roughly 32% of them trucks, projected to reach 7,117 by 2044. The structure is 229 ft (69.8 m) long and 33 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

CarriesMo 51 S
CrossesBois Brule CR
LocationS 118 T 36 N R 11 E
RouteState Highway 51
Coordinates37.82952, -89.84114
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating37.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length229 ft (69.8 m)
Longest span85 ft (25.9 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,746 (2024)
Projected traffic7,117 by 2044
Trucks32%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 51 S over Bois Brule CR built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2009.

What condition is Mo 51 S over Bois Brule CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Mo 51 S over Bois Brule CR carry?

About 3,746 vehicles per day (2024 count), of which roughly 32% are trucks.

How long is Mo 51 S over Bois Brule CR?

The structure is 229 ft (69.8 m) long with a longest span of 85 ft (25.9 m) and a deck 33 ft wide.

Who owns Mo 51 S over Bois Brule CR?

It is owned by the State Highway Agency.