US Bridges

N2980 over Mountain Creek

FairPosted for load

Jefferson County, Oklahoma · 8.6 MI N of US 70 · Structure no. 225270000000000

Built
1990
35 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
25
2022 count
Owner
County
County Highway Agency

About this bridge

N2980 over Mountain Creek is a steel stringer/multi-beam or girder carrying N2980 over Mountain Creek in Jefferson 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 5 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 40 by 2042. The structure is 40 ft (12.3 m) long and 16 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesN2980
CrossesMountain Creek
Location8.6 MI N of US 70
RouteCounty Highway N2980
CountyJefferson County
StateOklahoma
Coordinates34.28296, -97.68485
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.5 US tons
Inventory rating29.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length40 ft (12.3 m)
Longest span38 ft (11.7 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic40 by 2042
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N2980 over Mountain Creek built?

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

What condition is N2980 over Mountain 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 May 2023.

How much traffic does N2980 over Mountain Creek carry?

About 25 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N2980 over Mountain Creek?

The structure is 40 ft (12.3 m) long with a longest span of 38 ft (11.7 m) and a deck 16 ft wide.

Who owns N2980 over Mountain Creek?

It is owned by the County Highway Agency.