US Bridges

County RD #416 over Twelve Mile CR

Fair

Madison County, Missouri · S 9 T 31 N R 6 E · Structure no. 15240

Built
1920
105 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete
Length
27 ft
2 main spans
Daily traffic
20
2024 count
Owner
County
County Highway Agency

About this bridge

County RD #416 over Twelve Mile CR is a concrete slab carrying County RD #416 over Twelve Mile CR in Madison County, Missouri. It was built in 1920, so it is 105 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 5 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 26 by 2044. The structure is 27 ft (8.2 m) long and 12 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCounty RD #416
CrossesTwelve Mile CR
LocationS 9 T 31 N R 6 E
RouteCounty Highway 89
CountyMadison County
StateMissouri
Coordinates37.37397, -90.39558
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating54.6 US tons
Inventory rating24.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length27 ft (8.2 m)
Longest span10 ft (3 m)
Deck width12 ft (3.7 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2024)
Projected traffic26 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 County RD #416 over Twelve Mile CR built?

It was built in 1920, making it 105 years old in 2025.

What condition is County RD #416 over Twelve Mile 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 December 2023.

How much traffic does County RD #416 over Twelve Mile CR carry?

About 20 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD #416 over Twelve Mile CR?

The structure is 27 ft (8.2 m) long with a longest span of 10 ft (3 m) and a deck 12 ft wide.

Who owns County RD #416 over Twelve Mile CR?

It is owned by the County Highway Agency.