US Bridges

D4710 over Big Eagle Creek

FairPosted for load

McCurtain County, Oklahoma · 1.2 S 1. W of Smithville · Structure no. 095310000000000

Built
1940
85 years old
Condition
Fair
inspected May 2023
Type
Truss - Thru
Steel
Length
298 ft
1 main span
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

D4710 over Big Eagle Creek is a steel truss - thru carrying D4710 over Big Eagle Creek in McCurtain County, Oklahoma. It was built in 1940, so it is 85 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 5 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 64 by 2042. The structure is 298 ft (90.8 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesD4710
CrossesBig Eagle Creek
Location1.2 S 1. W of Smithville
RouteCounty Highway D4710
CountyMcCurtain County
StateOklahoma
Coordinates34.44962, -94.66161
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating23.3 US tons
Inventory rating13.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+5 approach)
Design loadH 10
Structure length298 ft (90.8 m)
Longest span144 ft (43.9 m)
Deck width20 ft (6.1 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deck11 ft (3.3 m)

Traffic and service

Average daily traffic40 (2022)
Projected traffic64 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$888,000
NavigationNo navigation control on waterway

Frequently asked questions

When was D4710 over Big Eagle Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is D4710 over Big Eagle 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 May 2023.

How much traffic does D4710 over Big Eagle Creek carry?

About 40 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is D4710 over Big Eagle Creek?

The structure is 298 ft (90.8 m) long with a longest span of 144 ft (43.9 m) and a deck 20 ft wide.

Who owns D4710 over Big Eagle Creek?

It is owned by the County Highway Agency.