US Bridges

N3150 over Red Rock Creek

Fair

Noble County, Oklahoma · 2.5W 3.4S of I-35/SH15 · Structure no. 226590000000000

Built
1990
35 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
198 ft
3 main spans
Daily traffic
24
2022 count
Owner
County
County Highway Agency

About this bridge

N3150 over Red Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying N3150 over Red Rock Creek in Noble County, Oklahoma. It was built in 1990, so it is 35 years old, younger 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 24 vehicles a day, roughly 10% of them trucks, projected to reach 38 by 2042. The structure is 198 ft (60.2 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesN3150
CrossesRed Rock Creek
Location2.5W 3.4S of I-35/SH15
RouteCounty Highway N3150
Coordinates36.48607, -97.39026
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length198 ft (60.2 m)
Longest span75 ft (22.9 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24 (2022)
Projected traffic38 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$712,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3150 over Red Rock Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is N3150 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 August 2024.

How much traffic does N3150 over Red Rock Creek carry?

About 24 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3150 over Red Rock Creek?

The structure is 198 ft (60.2 m) long with a longest span of 75 ft (22.9 m) and a deck 29 ft wide.

Who owns N3150 over Red Rock Creek?

It is owned by the County Highway Agency.