US Bridges

FSR 512 over Little Missouri River

Good

Montgomery County, Arkansas · 5 Mi. North of St. HWY 84 · Structure no. 080902000015323

Built
2008
17 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete
Length
90 ft
8 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

FSR 512 over Little Missouri River is a concrete slab carrying FSR 512 over Little Missouri River in Montgomery County, Arkansas. It was built in 2008, so it is 17 years old, younger than the Arkansas average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 90 ft (27.5 m) long and 16 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

Location

Open in Google Maps
CarriesFSR 512
CrossesLittle Missouri River
Location5 Mi. North of St. HWY 84
RouteFederal Lands Road 512
CountyMontgomery County
StateArkansas
Coordinates34.38202, -93.88437
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.3 US tons
Inventory rating22.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadH 20
Structure length90 ft (27.5 m)
Longest span10 ft (3.2 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FSR 512 over Little Missouri River built?

It was built in 2008, making it 17 years old in 2025.

What condition is FSR 512 over Little Missouri River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does FSR 512 over Little Missouri River carry?

About 50 vehicles per day (latest count).

How long is FSR 512 over Little Missouri River?

The structure is 90 ft (27.5 m) long with a longest span of 10 ft (3.2 m) and a deck 16 ft wide.

Who owns FSR 512 over Little Missouri River?

It is owned by the U.S. Forest Service.