US Bridges

State HWY 49 over Antelope Flat Drainage

Fair

Comanche County, Oklahoma · HWY 49/WEST Exit Road · Structure no. 000021670-00038

Built
1939
86 years old, rebuilt 1945
Condition
Fair
inspected April 2022
Type
Slab
Concrete Continuous
Length
30 ft
4 main spans
Daily traffic
1,250
2022 count
Owner
Federal
Bureau of Fish and Wildlife

About this bridge

State HWY 49 over Antelope Flat Drainage is a concrete continuous slab carrying State HWY 49 over Antelope Flat Drainage in Comanche County, Oklahoma. It was built in 1939 and reconstructed in 1945, so it is 86 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 1,250 vehicles a day, roughly 1% of them trucks, projected to reach 1,250 by 2042. The structure is 30 ft (9.1 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesState HWY 49
CrossesAntelope Flat Drainage
LocationHWY 49/WEST Exit Road
RouteFederal Lands Road 0
CountyComanche County
StateOklahoma
Coordinates34.744, -98.74167
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2022
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 alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span7 ft (2.1 m)
Deck width31 ft (9.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deck107 ft (32.7 m)

Traffic and service

Average daily traffic1,250 (2022)
Projected traffic1,250 by 2042
Trucks1%
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

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 State HWY 49 over Antelope Flat Drainage built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1945.

What condition is State HWY 49 over Antelope Flat Drainage 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 April 2022.

How much traffic does State HWY 49 over Antelope Flat Drainage carry?

About 1,250 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is State HWY 49 over Antelope Flat Drainage?

The structure is 30 ft (9.1 m) long with a longest span of 7 ft (2.1 m) and a deck 31 ft wide.

Who owns State HWY 49 over Antelope Flat Drainage?

It is owned by the Bureau of Fish and Wildlife.