US Bridges

Auto Tour Road over Horton Slough

Fair

Sequoyah County, Oklahoma · Gravel RD-1/8 MI S of Hq · Structure no. 000021640-00005

Built
1940
85 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
37 ft
1 main span
Daily traffic
50
2024 count
Owner
Federal
Bureau of Fish and Wildlife

About this bridge

Auto Tour Road over Horton Slough is a concrete tee beam carrying Auto Tour Road over Horton Slough in Sequoyah 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.

It carries about 50 vehicles a day, projected to reach 60 by 2044. The structure is 37 ft (11.3 m) long and 29 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesAuto Tour Road
CrossesHorton Slough
LocationGravel RD-1/8 MI S of Hq
RouteFederal Lands Road 0
CountySequoyah County
StateOklahoma
Coordinates35.447, -94.97333
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length37 ft (11.3 m)
Longest span35 ft (10.7 m)
Deck width29 ft (8.9 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deck107 ft (32.7 m)

Traffic and service

Average daily traffic50 (2024)
Projected traffic60 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Fish and Wildlife
Maintained byBureau of Fish and Wildlife
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Auto Tour Road over Horton Slough built?

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

What condition is Auto Tour Road over Horton Slough 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 June 2024.

How much traffic does Auto Tour Road over Horton Slough carry?

About 50 vehicles per day (2024 count).

How long is Auto Tour Road over Horton Slough?

The structure is 37 ft (11.3 m) long with a longest span of 35 ft (10.7 m) and a deck 29 ft wide.

Who owns Auto Tour Road over Horton Slough?

It is owned by the Bureau of Fish and Wildlife.