US Bridges

Benton Ave over Mna RR

FairPosted for load

Greene County, Missouri · S 13 T 29 N R 22 W · Structure no. 23415

Built
1927
98 years old, rebuilt 1978
Condition
Fair
inspected May 2024
Type
Tee Beam
Concrete
Length
980 ft
26 main spans
Daily traffic
11,500
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Benton Ave over Mna RR is a concrete tee beam carrying Benton Ave over Mna RR in Greene County, Missouri. It was built in 1927 and reconstructed in 1978, so it is 98 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. Its operating status is: posted for load restriction.

It carries about 11,500 vehicles a day, roughly 10% of them trucks, projected to reach 17,250 by 2044. The structure is 980 ft (298.7 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBenton Ave
CrossesMna RR
LocationS 13 T 29 N R 22 W
RouteCity Street 0
CountyGreene County
StateMissouri
Coordinates37.21157, -93.28762
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans26 (+6 approach)
Design loadH 20
Structure length980 ft (298.7 m)
Longest span53 ft (16.2 m)
Deck width50 ft (15.2 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,500 (2024)
Projected traffic17,250 by 2044
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$10 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Benton Ave over Mna RR built?

It was built in 1927, making it 98 years old in 2025. It was reconstructed in 1978.

What condition is Benton Ave over Mna RR 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 May 2024.

How much traffic does Benton Ave over Mna RR carry?

About 11,500 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Benton Ave over Mna RR?

The structure is 980 ft (298.7 m) long with a longest span of 53 ft (16.2 m) and a deck 50 ft wide.

Who owns Benton Ave over Mna RR?

It is owned by the City or Municipal Highway Agency.