US Bridges

Is 49 N over Rt Nn

Fair

McDonald County, Missouri · S 32 T 23 N R 32 W · Structure no. 11794

Built
2000
25 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Prestressed Concrete Continuous
Length
306 ft
3 main spans
Daily traffic
6,923
2024 count
Owner
State
State Highway Agency

About this bridge

Is 49 N over Rt Nn is a prestressed concrete continuous tee beam carrying Is 49 N over Rt Nn in McDonald County, Missouri. It was built in 2000, so it is 25 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 6,923 vehicles a day, roughly 33% of them trucks, projected to reach 12,115 by 2044. The structure is 306 ft (93.3 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 49 N
CrossesRt Nn
LocationS 32 T 23 N R 32 W
RouteInterstate 49
Coordinates36.6803, -94.41909
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.3 US tons
Inventory rating49.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length306 ft (93.3 m)
Longest span102 ft (31.2 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,923 (2024)
Projected traffic12,115 by 2044
Trucks33%
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 Nn built?

It was built in 2000, making it 25 years old in 2025.

What condition is Is 49 N over Rt Nn 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 October 2024.

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

About 6,923 vehicles per day (2024 count), of which roughly 33% are trucks.

How long is Is 49 N over Rt Nn?

The structure is 306 ft (93.3 m) long with a longest span of 102 ft (31.2 m) and a deck 40 ft wide.

Who owns Is 49 N over Rt Nn?

It is owned by the State Highway Agency.