US Bridges

N2830 over Coldwater Creek

Fair

Grant County, Oklahoma · 4.7E 1.4N of Nash · Structure no. 210310000000000

Built
1985
40 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
101 ft
3 main spans
Daily traffic
234
2022 count
Owner
County
County Highway Agency

About this bridge

N2830 over Coldwater Creek is a concrete stringer/multi-beam or girder carrying N2830 over Coldwater Creek in Grant County, Oklahoma. It was built in 1985, so it is 40 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 101 ft (30.7 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN2830
CrossesColdwater Creek
Location4.7E 1.4N of Nash
RouteCounty Highway N2830
CountyGrant County
StateOklahoma
Coordinates36.68658, -97.96582
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length101 ft (30.7 m)
Longest span33 ft (10.2 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 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 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$514,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N2830 over Coldwater Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is N2830 over Coldwater 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 N2830 over Coldwater Creek carry?

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

How long is N2830 over Coldwater Creek?

The structure is 101 ft (30.7 m) long with a longest span of 33 ft (10.2 m) and a deck 28 ft wide.

Who owns N2830 over Coldwater Creek?

It is owned by the County Highway Agency.