US Bridges

Is 49 N over Rt B

Good

McDonald County, Missouri · S 7 T 23 N R 32 W · Structure no. 11730

Built
1998
27 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
159 ft
3 main spans
Daily traffic
10,746
2024 count
Owner
State
State Highway Agency

About this bridge

Is 49 N over Rt B is a prestressed concrete continuous stringer/multi-beam or girder carrying Is 49 N over Rt B in McDonald County, Missouri. It was built in 1998, so it is 27 years old, younger 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 10,746 vehicles a day, roughly 10% of them trucks, projected to reach 18,806 by 2044. The structure is 159 ft (48.5 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 49 N
CrossesRt B
LocationS 7 T 23 N R 32 W
RouteInterstate 49
Coordinates36.73828, -94.42572
Functional classRural Principal Arterial - Interstate

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.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.3 US tons
Inventory rating49.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length159 ft (48.5 m)
Longest span55 ft (16.8 m)
Deck width41 ft (12.6 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,746 (2024)
Projected traffic18,806 by 2044
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 B built?

It was built in 1998, making it 27 years old in 2025.

What condition is Is 49 N over Rt B 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 2024.

How much traffic does Is 49 N over Rt B carry?

About 10,746 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Is 49 N over Rt B?

The structure is 159 ft (48.5 m) long with a longest span of 55 ft (16.8 m) and a deck 41 ft wide.

Who owns Is 49 N over Rt B?

It is owned by the State Highway Agency.