US Bridges

D1550 over Black Fork Creek

Fair

Le Flore County, Oklahoma · 1.1 N 0.7 E Stapp · Structure no. 044740000000000

Built
1935
90 years old, rebuilt 1999
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
48 ft
3 main spans
Daily traffic
24
2022 count
Owner
County
County Highway Agency

About this bridge

D1550 over Black Fork Creek is a concrete slab carrying D1550 over Black Fork Creek in Le Flore County, Oklahoma. It was built in 1935 and reconstructed in 1999, so it is 90 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 24 vehicles a day, roughly 10% of them trucks, projected to reach 38 by 2042. The structure is 48 ft (14.6 m) long and 14 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesD1550
CrossesBlack Fork Creek
Location1.1 N 0.7 E Stapp
RouteCounty Highway D1550
Coordinates34.77322, -94.61038
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating36 US tons
Inventory rating23 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length48 ft (14.6 m)
Longest span16 ft (4.9 m)
Deck width14 ft (4.4 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24 (2022)
Projected traffic38 by 2042
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was D1550 over Black Fork Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1999.

What condition is D1550 over Black Fork Creek 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 March 2023.

How much traffic does D1550 over Black Fork Creek carry?

About 24 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is D1550 over Black Fork Creek?

The structure is 48 ft (14.6 m) long with a longest span of 16 ft (4.9 m) and a deck 14 ft wide.

Who owns D1550 over Black Fork Creek?

It is owned by the County Highway Agency.