US Bridges

N3070 over Black Bear Creek

FairPosted for load

Garfield County, Oklahoma · 3E 2S of US64/SH74 · Structure no. 005070000000000

Built
1917
108 years old, rebuilt 1957
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
154 ft
3 main spans
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

N3070 over Black Bear Creek is a steel stringer/multi-beam or girder carrying N3070 over Black Bear Creek in Garfield County, Oklahoma. It was built in 1917 and reconstructed in 1957, so it is 108 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 50 vehicles a day, roughly 15% of them trucks, projected to reach 80 by 2042. The structure is 154 ft (46.9 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesN3070
CrossesBlack Bear Creek
Location3E 2S of US64/SH74
RouteCounty Highway N3070
Coordinates36.36969, -97.53234
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26 US tons
Inventory rating15 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans3
Design loadH 10
Structure length154 ft (46.9 m)
Longest span54 ft (16.5 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic80 by 2042
Trucks15%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$682,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3070 over Black Bear Creek built?

It was built in 1917, making it 108 years old in 2025. It was reconstructed in 1957.

What condition is N3070 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 March 2024.

How much traffic does N3070 over Black Bear Creek carry?

About 50 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N3070 over Black Bear Creek?

The structure is 154 ft (46.9 m) long with a longest span of 54 ft (16.5 m) and a deck 16 ft wide.

Who owns N3070 over Black Bear Creek?

It is owned by the County Highway Agency.