US Bridges

Is 49 N over S Grand Rvr

Fair

Cass County, Missouri · S 26 T 46 N R 32 W · Structure no. 1753

Built
1968
57 years old, rebuilt 2018
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
125 ft
3 main spans
Daily traffic
18,198
2024 count
Owner
State
State Highway Agency

About this bridge

Is 49 N over S Grand Rvr is a steel continuous stringer/multi-beam or girder carrying Is 49 N over S Grand Rvr in Cass County, Missouri. It was built in 1968 and reconstructed in 2018, so it is 57 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 18,198 vehicles a day, roughly 20% of them trucks, projected to reach 31,847 by 2044. The structure is 125 ft (38.1 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 49 N
CrossesS Grand Rvr
LocationS 26 T 46 N R 32 W
RouteInterstate 49
Coordinates38.69023, -94.42662
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating40.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length125 ft (38.1 m)
Longest span49 ft (14.9 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,198 (2024)
Projected traffic31,847 by 2044
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 49 N over S Grand Rvr built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2018.

What condition is Is 49 N over S Grand Rvr 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 November 2023.

How much traffic does Is 49 N over S Grand Rvr carry?

About 18,198 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is Is 49 N over S Grand Rvr?

The structure is 125 ft (38.1 m) long with a longest span of 49 ft (14.9 m) and a deck 41 ft wide.

Who owns Is 49 N over S Grand Rvr?

It is owned by the State Highway Agency.