US Bridges

US 412 S4 Madison over Onion Creek

Fair

Madison County, Arkansas · 2.5 MI W JCT SH 21 · Structure no. 000000000006787

Built
2001
24 years old
Condition
Fair
inspected May 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
153 ft
3 main spans
Daily traffic
6,400
2018 count
Owner
State
State Highway Agency

About this bridge

US 412 S4 Madison over Onion Creek is a steel continuous stringer/multi-beam or girder carrying US 412 S4 Madison over Onion Creek in Madison County, Arkansas. It was built in 2001, so it is 24 years old, younger than the Arkansas 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 6,400 vehicles a day, roughly 14% of them trucks, projected to reach 6,356 by 2028. The structure is 153 ft (46.6 m) long and 43 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

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CarriesUS 412 S4 Madison
CrossesOnion Creek
Location2.5 MI W JCT SH 21
RouteU.S. Route 412
CountyMadison County
StateArkansas
Coordinates36.14105, -93.59344
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length153 ft (46.6 m)
Longest span56 ft (17.1 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,400 (2018)
Projected traffic6,356 by 2028
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 412 S4 Madison over Onion Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is US 412 S4 Madison over Onion Creek 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 May 2022.

How much traffic does US 412 S4 Madison over Onion Creek carry?

About 6,400 vehicles per day (2018 count), of which roughly 14% are trucks.

How long is US 412 S4 Madison over Onion Creek?

The structure is 153 ft (46.6 m) long with a longest span of 56 ft (17.1 m) and a deck 43 ft wide.

Who owns US 412 S4 Madison over Onion Creek?

It is owned by the State Highway Agency.