US Bridges

Is 49 N over Douglas Branch

Good

Vernon County, Missouri · S 5 T 36 N R 31 W · Structure no. 33944

Built
2012
13 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
255 ft
3 main spans
Daily traffic
5,535
2024 count
Owner
State
State Highway Agency

About this bridge

Is 49 N over Douglas Branch is a prestressed concrete continuous stringer/multi-beam or girder carrying Is 49 N over Douglas Branch in Vernon County, Missouri. It was built in 2012, so it is 13 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,535 vehicles a day, roughly 32% of them trucks, projected to reach 9,686 by 2044. The structure is 255 ft (77.7 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIs 49 N
CrossesDouglas Branch
LocationS 5 T 36 N R 31 W
RouteInterstate 49
Coordinates37.9378, -94.36868
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
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.4 US tons
Inventory rating44.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length255 ft (77.7 m)
Longest span90 ft (27.4 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,535 (2024)
Projected traffic9,686 by 2044
Trucks32%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 49 N over Douglas Branch built?

It was built in 2012, making it 13 years old in 2025.

What condition is Is 49 N over Douglas Branch 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 June 2023.

How much traffic does Is 49 N over Douglas Branch carry?

About 5,535 vehicles per day (2024 count), of which roughly 32% are trucks.

How long is Is 49 N over Douglas Branch?

The structure is 255 ft (77.7 m) long with a longest span of 90 ft (27.4 m) and a deck 41 ft wide.

Who owns Is 49 N over Douglas Branch?

It is owned by the State Highway Agency.