US Bridges

Fdr 31 over Cossatot River

FairPosted for load

Polk County, Arkansas · 9.7 MI S of HWY 375 · Structure no. 080907000003102

Built
1939
86 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete
Length
104 ft
4 main spans
Daily traffic
50
1992 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 31 over Cossatot River is a concrete slab carrying Fdr 31 over Cossatot River in Polk County, Arkansas. It was built in 1939, so it is 86 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. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 104 ft (31.7 m) long and 12 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesFdr 31
CrossesCossatot River
Location9.7 MI S of HWY 375
RouteCounty Highway 31
CountyPolk County
StateArkansas
Coordinates34.39249, -94.20013
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating22 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length104 ft (31.7 m)
Longest span24 ft (7.3 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (1992)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 Fdr 31 over Cossatot River built?

It was built in 1939, making it 86 years old in 2025.

What condition is Fdr 31 over Cossatot 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 October 2023.

How much traffic does Fdr 31 over Cossatot River carry?

About 50 vehicles per day (1992 count).

How long is Fdr 31 over Cossatot River?

The structure is 104 ft (31.7 m) long with a longest span of 24 ft (7.3 m) and a deck 12 ft wide.

Who owns Fdr 31 over Cossatot River?

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