US Bridges

Bombardier Trail over Walnut CR

Fair

Adair County, Missouri · S 30 T 61 N R 16 W · Structure no. 23377

Built
1991
34 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
87 ft
3 main spans
Daily traffic
5
2024 count
Owner
County
County Highway Agency

About this bridge

Bombardier Trail over Walnut CR is a steel stringer/multi-beam or girder carrying Bombardier Trail over Walnut CR in Adair County, Missouri. It was built in 1991, so it is 34 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 5 vehicles a day, roughly 10% of them trucks, projected to reach 6 by 2044. The structure is 87 ft (26.5 m) long and 16 ft wide. If it were closed, the detour would be 96.9 mi (156 km).

Location

Open in Google Maps
CarriesBombardier Trail
CrossesWalnut CR
LocationS 30 T 61 N R 16 W
RouteCounty Highway 406
CountyAdair County
StateMissouri
Coordinates40.05184, -92.73434
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length87 ft (26.5 m)
Longest span39 ft (11.9 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2024)
Projected traffic6 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed96.9 mi (156 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$445,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Bombardier Trail over Walnut CR built?

It was built in 1991, making it 34 years old in 2025.

What condition is Bombardier Trail over Walnut CR 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 February 2024.

How much traffic does Bombardier Trail over Walnut CR carry?

About 5 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Bombardier Trail over Walnut CR?

The structure is 87 ft (26.5 m) long with a longest span of 39 ft (11.9 m) and a deck 16 ft wide.

Who owns Bombardier Trail over Walnut CR?

It is owned by the County Highway Agency.