US Bridges

Bombardier Trail over Unnamed Str

Good

Adair County, Missouri · S 30 T 61 N R 16 W · Structure no. 23378

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

About this bridge

Bombardier Trail over Unnamed Str is a steel stringer/multi-beam or girder carrying Bombardier Trail over Unnamed Str 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 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 5 vehicles a day, roughly 10% of them trucks, projected to reach 6 by 2044. The structure is 69 ft (21 m) long and 16 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesBombardier Trail
CrossesUnnamed Str
LocationS 30 T 61 N R 16 W
RouteCounty Highway 406
Coordinates40.05234, -92.73169
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating36.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length69 ft (21 m)
Longest span29 ft (8.8 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 closed6.8 mi (11 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Bombardier Trail over Unnamed Str built?

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

What condition is Bombardier Trail over Unnamed Str 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 February 2024.

How much traffic does Bombardier Trail over Unnamed Str carry?

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

How long is Bombardier Trail over Unnamed Str?

The structure is 69 ft (21 m) long with a longest span of 29 ft (8.8 m) and a deck 16 ft wide.

Who owns Bombardier Trail over Unnamed Str?

It is owned by the County Highway Agency.