US Bridges

Mo 51 S over Longs CR

Fair

Bollinger County, Missouri · S 2 T 32 N R 9 E · Structure no. 4590

Built
1922
103 years old
Condition
Fair
inspected December 2023
Type
Tee Beam
Concrete
Length
43 ft
1 main span
Daily traffic
1,309
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 51 S over Longs CR is a concrete tee beam carrying Mo 51 S over Longs CR in Bollinger County, Missouri. It was built in 1922, so it is 103 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,309 vehicles a day, roughly 21% of them trucks, projected to reach 2,029 by 2044. The structure is 43 ft (13.1 m) long and 23 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesMo 51 S
CrossesLongs CR
LocationS 2 T 32 N R 9 E
RouteState Highway 51
CountyBollinger County
StateMissouri
Coordinates37.478, -90.03097
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56.5 US tons
Inventory rating33.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length43 ft (13.1 m)
Longest span40 ft (12.2 m)
Deck width23 ft (7.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,309 (2024)
Projected traffic2,029 by 2044
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$390,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 51 S over Longs CR built?

It was built in 1922, making it 103 years old in 2025.

What condition is Mo 51 S over Longs CR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2023.

How much traffic does Mo 51 S over Longs CR carry?

About 1,309 vehicles per day (2024 count), of which roughly 21% are trucks.

How long is Mo 51 S over Longs CR?

The structure is 43 ft (13.1 m) long with a longest span of 40 ft (12.2 m) and a deck 23 ft wide.

Who owns Mo 51 S over Longs CR?

It is owned by the State Highway Agency.