US Bridges

N3270 over Black Bear Creek

FairPosted for load

Noble County, Oklahoma · 3.1W 2.2N of Sumner · Structure no. 161760000000000

Built
1964
61 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
402 ft
4 main spans
Daily traffic
52
2022 count
Owner
County
County Highway Agency

About this bridge

N3270 over Black Bear Creek is a steel continuous stringer/multi-beam or girder carrying N3270 over Black Bear Creek in Noble County, Oklahoma. It was built in 1964, so it is 61 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. Its operating status is: posted for load restriction.

It carries about 52 vehicles a day, roughly 10% of them trucks, projected to reach 83 by 2042. The structure is 402 ft (122.5 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesN3270
CrossesBlack Bear Creek
Location3.1W 2.2N of Sumner
RouteCounty Highway N3270
Coordinates36.34957, -97.17535
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39 US tons
Inventory rating23 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length402 ft (122.5 m)
Longest span110 ft (33.5 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52 (2022)
Projected traffic83 by 2042
Trucks10%
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

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$1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was N3270 over Black Bear Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is N3270 over Black Bear 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 N3270 over Black Bear Creek carry?

About 52 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3270 over Black Bear Creek?

The structure is 402 ft (122.5 m) long with a longest span of 110 ft (33.5 m) and a deck 27 ft wide.

Who owns N3270 over Black Bear Creek?

It is owned by the County Highway Agency.