US Bridges

N3370 over Black Bear Creek

Good

Noble County, Oklahoma · .8E .8N of Morrison · Structure no. 242440000000000

Built
1996
29 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
253 ft
3 main spans
Daily traffic
83
2022 count
Owner
County
County Highway Agency

About this bridge

N3370 over Black Bear Creek is a prestressed concrete stringer/multi-beam or girder carrying N3370 over Black Bear Creek in Noble County, Oklahoma. It was built in 1996, so it is 29 years old, younger than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 83 vehicles a day, roughly 15% of them trucks, projected to reach 133 by 2042. The structure is 253 ft (77.1 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesN3370
CrossesBlack Bear Creek
Location.8E .8N of Morrison
RouteCounty Highway N3370
Coordinates36.30711, -96.99636
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 rating81 US tons
Inventory rating39 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length253 ft (77.1 m)
Longest span100 ft (30.5 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic83 (2022)
Projected traffic133 by 2042
Trucks15%
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$813,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3370 over Black Bear Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is N3370 over Black Bear Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does N3370 over Black Bear Creek carry?

About 83 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N3370 over Black Bear Creek?

The structure is 253 ft (77.1 m) long with a longest span of 100 ft (30.5 m) and a deck 29 ft wide.

Who owns N3370 over Black Bear Creek?

It is owned by the County Highway Agency.