US Bridges

N3680 over Horse Creek

Fair

Johnston County, Oklahoma · .9 N & 2.4 E of Nida · Structure no. 220110000000000

Built
1988
37 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
133 ft
3 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N3680 over Horse Creek is a prestressed concrete stringer/multi-beam or girder carrying N3680 over Horse Creek in Johnston County, Oklahoma. It was built in 1988, so it is 37 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.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 133 ft (40.4 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesN3680
CrossesHorse Creek
Location.9 N & 2.4 E of Nida
RouteCounty Highway N3680
Coordinates34.15731, -96.46127
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.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
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 rating83 US tons
Inventory rating46 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length133 ft (40.4 m)
Longest span60 ft (18.3 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$589,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3680 over Horse Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is N3680 over Horse 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 N3680 over Horse Creek carry?

About 100 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3680 over Horse Creek?

The structure is 133 ft (40.4 m) long with a longest span of 60 ft (18.3 m) and a deck 29 ft wide.

Who owns N3680 over Horse Creek?

It is owned by the County Highway Agency.