US Bridges

S.H. 74 over Antelope Creek

Fair

Grant County, Oklahoma · 6.1 MI N JCT US 60 · Structure no. 154890000000000

Built
1962
63 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
45 ft
3 main spans
Daily traffic
620
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 74 over Antelope Creek is a concrete culvert carrying S.H. 74 over Antelope Creek in Grant County, Oklahoma. It was built in 1962, so it is 63 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 620 vehicles a day, roughly 15% of them trucks, projected to reach 992 by 2042. The structure is 45 ft (13.7 m) long and 34 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

Location

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CarriesS.H. 74
CrossesAntelope Creek
Location6.1 MI N JCT US 60
RouteState Highway 74
CountyGrant County
StateOklahoma
Coordinates36.78266, -97.55229
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span17 ft (5.2 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic620 (2022)
Projected traffic992 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$644,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 74 over Antelope Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is S.H. 74 over Antelope 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 2024.

How much traffic does S.H. 74 over Antelope Creek carry?

About 620 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 74 over Antelope Creek?

The structure is 45 ft (13.7 m) long with a longest span of 17 ft (5.2 m) and a deck 34 ft wide.

Who owns S.H. 74 over Antelope Creek?

It is owned by the State Highway Agency.