US Bridges

Is 49 N over Rt D Mna RR

Fair

Jasper County, Missouri · S 28 T 29 N R 31 W · Structure no. 2977

Built
1983
42 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
329 ft
4 main spans
Daily traffic
7,112
2024 count
Owner
State
State Highway Agency

About this bridge

Is 49 N over Rt D Mna RR is a steel continuous stringer/multi-beam or girder carrying Is 49 N over Rt D Mna RR in Jasper County, Missouri. It was built in 1983, so it is 42 years old, younger 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 7,112 vehicles a day, roughly 41% of them trucks, projected to reach 12,802 by 2044. The structure is 329 ft (100.3 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 49 N
CrossesRt D Mna RR
LocationS 28 T 29 N R 31 W
RouteInterstate 49
Coordinates37.20568, -94.30727
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating40.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length329 ft (100.3 m)
Longest span112 ft (34.1 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,112 (2024)
Projected traffic12,802 by 2044
Trucks41%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 49 N over Rt D Mna RR built?

It was built in 1983, making it 42 years old in 2025.

What condition is Is 49 N over Rt D 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 July 2023.

How much traffic does Is 49 N over Rt D Mna RR carry?

About 7,112 vehicles per day (2024 count), of which roughly 41% are trucks.

How long is Is 49 N over Rt D Mna RR?

The structure is 329 ft (100.3 m) long with a longest span of 112 ft (34.1 m) and a deck 42 ft wide.

Who owns Is 49 N over Rt D Mna RR?

It is owned by the State Highway Agency.