US Bridges

N2830 over Salt Fork Arkansas River

Fair

Grant County, Oklahoma · 4.7E 3.6N of Nash · Structure no. 200010000000000

Built
1981
44 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
602 ft
6 main spans
Daily traffic
234
2022 count
Owner
County
County Highway Agency

About this bridge

N2830 over Salt Fork Arkansas River is a prestressed concrete stringer/multi-beam or girder carrying N2830 over Salt Fork Arkansas River in Grant County, Oklahoma. It was built in 1981, so it is 44 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 234 vehicles a day, roughly 15% of them trucks, projected to reach 374 by 2042. The structure is 602 ft (183.5 m) long and 30 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesN2830
CrossesSalt Fork Arkansas River
Location4.7E 3.6N of Nash
RouteCounty Highway N2830
CountyGrant County
StateOklahoma
Coordinates36.7187, -97.96598
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 20
Structure length602 ft (183.5 m)
Longest span100 ft (30.5 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic234 (2022)
Projected traffic374 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$1.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was N2830 over Salt Fork Arkansas River built?

It was built in 1981, making it 44 years old in 2025.

What condition is N2830 over Salt Fork Arkansas River 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 N2830 over Salt Fork Arkansas River carry?

About 234 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N2830 over Salt Fork Arkansas River?

The structure is 602 ft (183.5 m) long with a longest span of 100 ft (30.5 m) and a deck 30 ft wide.

Who owns N2830 over Salt Fork Arkansas River?

It is owned by the County Highway Agency.