US Bridges

S.H. 15 & S.H. 74 over Red Rock Creek

Fair

Garfield County, Oklahoma · 8.8 MI N JCT US 64 · Structure no. 190850000000000

Built
1975
50 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
213 ft
3 main spans
Daily traffic
950
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 15 & S.H. 74 over Red Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying S.H. 15 & S.H. 74 over Red Rock Creek in Garfield County, Oklahoma. It was built in 1975, so it is 50 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 950 vehicles a day, roughly 15% of them trucks, projected to reach 1,520 by 2042. The structure is 213 ft (64.8 m) long and 46 ft wide. If it were closed, the detour would be 52.8 mi (85 km).

Location

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CarriesS.H. 15 & S.H. 74
CrossesRed Rock Creek
Location8.8 MI N JCT US 64
RouteState Highway 15
CountyGarfield County
StateOklahoma
Coordinates36.52231, -97.58631
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length213 ft (64.8 m)
Longest span70 ft (21.3 m)
Deck width46 ft (13.9 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2022)
Projected traffic1,520 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed52.8 mi (85 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 15 & S.H. 74 over Red Rock Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is S.H. 15 & S.H. 74 over Red Rock 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 February 2024.

How much traffic does S.H. 15 & S.H. 74 over Red Rock Creek carry?

About 950 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 15 & S.H. 74 over Red Rock Creek?

The structure is 213 ft (64.8 m) long with a longest span of 70 ft (21.3 m) and a deck 46 ft wide.

Who owns S.H. 15 & S.H. 74 over Red Rock Creek?

It is owned by the State Highway Agency.