US Bridges

Calhoun ST over Town Br

Fair

Audrain County, Missouri · S 22 T 51 N R 9 W · Structure no. 31008

Built
1978
47 years old, rebuilt 2004
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
28 ft
2 main spans
Daily traffic
350
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Calhoun ST over Town Br is a concrete culvert carrying Calhoun ST over Town Br in Audrain County, Missouri. It was built in 1978 and reconstructed in 2004, so it is 47 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 350 vehicles a day, roughly 10% of them trucks, projected to reach 473 by 2043. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesCalhoun ST
CrossesTown Br
LocationS 22 T 51 N R 9 W
RouteCity Street 0
CountyAudrain County
StateMissouri
Coordinates39.17611, -91.88036
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2023)
Projected traffic473 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Calhoun ST over Town Br built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2004.

What condition is Calhoun ST over Town Br 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 March 2023.

How much traffic does Calhoun ST over Town Br carry?

About 350 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Calhoun ST over Town Br?

The structure is 28 ft (8.5 m) long with a longest span of 14 ft (4.3 m).

Who owns Calhoun ST over Town Br?

It is owned by the City or Municipal Highway Agency.