US Bridges

S.H. 87 over Walnut Bayou

Fair

McCurtain County, Oklahoma · 10.9 E JCT US-259 · Structure no. 109200000000000

Built
1948
77 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
77 ft
3 main spans
Daily traffic
160
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 87 over Walnut Bayou is a concrete slab carrying S.H. 87 over Walnut Bayou in McCurtain County, Oklahoma. It was built in 1948, so it is 77 years old, older than the Oklahoma average of 47.8 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 160 vehicles a day, roughly 15% of them trucks, projected to reach 256 by 2042. The structure is 77 ft (23.5 m) long and 25 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesS.H. 87
CrossesWalnut Bayou
Location10.9 E JCT US-259
RouteState Highway 87
CountyMcCurtain County
StateOklahoma
Coordinates33.6772, -94.53834
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating41 US tons
Inventory rating24 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length77 ft (23.5 m)
Longest span25 ft (7.6 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2022)
Projected traffic256 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 87 over Walnut Bayou built?

It was built in 1948, making it 77 years old in 2025.

What condition is S.H. 87 over Walnut Bayou 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 July 2023.

How much traffic does S.H. 87 over Walnut Bayou carry?

About 160 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 87 over Walnut Bayou?

The structure is 77 ft (23.5 m) long with a longest span of 25 ft (7.6 m) and a deck 25 ft wide.

Who owns S.H. 87 over Walnut Bayou?

It is owned by the State Highway Agency.