US Bridges

Madison CO RD 18-B over Spanker

FairPosted for load

Madison County, Arkansas · 4.41 So E US 412 · Structure no. 000000000015028

Built
1950
75 years old, rebuilt 1970
Condition
Fair
inspected March 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
2 main spans
Daily traffic
923
2018 count
Owner
County
County Highway Agency

About this bridge

Madison CO RD 18-B over Spanker is a steel stringer/multi-beam or girder carrying Madison CO RD 18-B over Spanker in Madison County, Arkansas. It was built in 1950 and reconstructed in 1970, so it is 75 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 923 vehicles a day, roughly 1% of them trucks, projected to reach 138 by 2007. The structure is 40 ft (12.2 m) long and 14 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesMadison CO RD 18-B
CrossesSpanker
Location4.41 So E US 412
RouteCounty Highway 18
CountyMadison County
StateArkansas
Coordinates36.09133, -93.56961
Functional classRural Minor Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating11 US tons
Inventory rating7.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span18 ft (5.5 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic923 (2018)
Projected traffic138 by 2007
Trucks1%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$228,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Madison CO RD 18-B over Spanker built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1970.

What condition is Madison CO RD 18-B over Spanker 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 2025.

How much traffic does Madison CO RD 18-B over Spanker carry?

About 923 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Madison CO RD 18-B over Spanker?

The structure is 40 ft (12.2 m) long with a longest span of 18 ft (5.5 m) and a deck 14 ft wide.

Who owns Madison CO RD 18-B over Spanker?

It is owned by the County Highway Agency.