US Bridges

Basswood ST over Br of Walnut CR

Good

Macon County, Missouri · S 10 T 60 N R 17 W · Structure no. 12580

Built
1998
27 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

Basswood ST over Br of Walnut CR is a steel stringer/multi-beam or girder carrying Basswood ST over Br of Walnut CR in Macon County, Missouri. It was built in 1998, so it is 27 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 17 by 2044. The structure is 70 ft (21.3 m) long and 18 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesBasswood ST
CrossesBr of Walnut CR
LocationS 10 T 60 N R 17 W
RouteCounty Highway 14
CountyMacon County
StateMissouri
Coordinates40.02047, -92.77377
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 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 alignment6: Equal to present minimum criteria
Operating rating68.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span69 ft (21 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic17 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Basswood ST over Br of Walnut CR built?

It was built in 1998, making it 27 years old in 2025.

What condition is Basswood ST over Br of Walnut CR 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 January 2024.

How much traffic does Basswood ST over Br of Walnut CR carry?

About 15 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Basswood ST over Br of Walnut CR?

The structure is 70 ft (21.3 m) long with a longest span of 69 ft (21 m) and a deck 18 ft wide.

Who owns Basswood ST over Br of Walnut CR?

It is owned by the County Highway Agency.