US Bridges

S.H. 259A over Mountain Fork River

Good

McCurtain County, Oklahoma · 5.2 E JCT US-259 · Structure no. 175370000000000

Built
1969
56 years old
Condition
Good
inspected July 2023
Type
Slab
Concrete
Length
199 ft
9 main spans
Daily traffic
720
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 259A over Mountain Fork River is a concrete slab carrying S.H. 259A over Mountain Fork River in McCurtain County, Oklahoma. It was built in 1969, so it is 56 years old, older than the Oklahoma average of 47.8 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 720 vehicles a day, roughly 15% of them trucks, projected to reach 1,152 by 2042. The structure is 199 ft (60.7 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesS.H. 259A
CrossesMountain Fork River
Location5.2 E JCT US-259
RouteState Highway 259A
CountyMcCurtain County
StateOklahoma
Coordinates34.13771, -94.68809
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Last inspectionJuly 2023
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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating40 US tons
Inventory rating20 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans9
Design loadH 20
Structure length199 ft (60.7 m)
Longest span23 ft (7 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic720 (2022)
Projected traffic1,152 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 259A over Mountain Fork River built?

It was built in 1969, making it 56 years old in 2025.

What condition is S.H. 259A over Mountain Fork 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 July 2023.

How much traffic does S.H. 259A over Mountain Fork River carry?

About 720 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 259A over Mountain Fork River?

The structure is 199 ft (60.7 m) long with a longest span of 23 ft (7 m) and a deck 30 ft wide.

Who owns S.H. 259A over Mountain Fork River?

It is owned by the State Highway Agency.