US Bridges

SH 21 Carroll over Ditch

Fair

Carroll County, Arkansas · West Outskirts of Maple · Structure no. 0000000000M0529

Built
1955
70 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
1,466
2018 count
Owner
State
State Highway Agency

About this bridge

SH 21 Carroll over Ditch is a concrete culvert carrying SH 21 Carroll over Ditch in Carroll County, Arkansas. It was built in 1955, so it is 70 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 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 1,466 vehicles a day, roughly 1% of them trucks, projected to reach 1,703 by 2028. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesSH 21 Carroll
CrossesDitch
LocationWest Outskirts of Maple
RouteState Highway 21
CountyCarroll County
StateArkansas
Coordinates36.43547, -93.50059
Functional classRural Minor Arterial

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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39 US tons
Inventory rating24 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,466 (2018)
Projected traffic1,703 by 2028
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 SH 21 Carroll over Ditch built?

It was built in 1955, making it 70 years old in 2025.

What condition is SH 21 Carroll over Ditch 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 2024.

How much traffic does SH 21 Carroll over Ditch carry?

About 1,466 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is SH 21 Carroll over Ditch?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns SH 21 Carroll over Ditch?

It is owned by the State Highway Agency.