US Bridges

Madison SH 21 over Kings River

Fair

Madison County, Arkansas · 2.75 MI N JCT SH 21-74 · Structure no. 000000000003366

Built
1960
65 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
302 ft
6 main spans
Daily traffic
1,600
2018 count
Owner
State
State Highway Agency

About this bridge

Madison SH 21 over Kings River is a steel stringer/multi-beam or girder carrying Madison SH 21 over Kings River in Madison County, Arkansas. It was built in 1960, so it is 65 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.

It carries about 1,600 vehicles a day, roughly 1% of them trucks, projected to reach 1,589 by 2028. The structure is 302 ft (92 m) long and 29 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

Open in Google Maps
CarriesMadison SH 21
CrossesKings River
Location2.75 MI N JCT SH 21-74
RouteState Highway 21
CountyMadison County
StateArkansas
Coordinates36.08787, -93.5419
Functional classRural Major 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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length302 ft (92 m)
Longest span50 ft (15.2 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2018)
Projected traffic1,589 by 2028
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 km)
TollOn a free road
National Highway SystemNo

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 Madison SH 21 over Kings River built?

It was built in 1960, making it 65 years old in 2025.

What condition is Madison SH 21 over Kings River 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 November 2023.

How much traffic does Madison SH 21 over Kings River carry?

About 1,600 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Madison SH 21 over Kings River?

The structure is 302 ft (92 m) long with a longest span of 50 ft (15.2 m) and a deck 29 ft wide.

Who owns Madison SH 21 over Kings River?

It is owned by the State Highway Agency.