US Bridges

Co. Rd. N3680 over Cimarron Tp under

Good

Pawnee County, Oklahoma · 3 Mis W JCT SH 48 · Structure no. 185190000000000

Built
1973
52 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
156 ft
2 main spans
Daily traffic
5,700
2022 count
Owner
Toll Authority
State Toll Authority

About this bridge

Co. Rd. N3680 over Cimarron Tp under is a prestressed concrete stringer/multi-beam or girder carrying Co. Rd. N3680 over Cimarron Tp under in Pawnee County, Oklahoma. It was built in 1973, so it is 52 years old, older 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 5,700 vehicles a day, roughly 15% of them trucks, projected to reach 9,120 by 2042. The structure is 156 ft (47.5 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCo. Rd. N3680
CrossesCimarron Tp under
Location3 Mis W JCT SH 48
RouteCounty Highway N3680
CountyPawnee County
StateOklahoma
Coordinates36.21978, -96.44611
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.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.5 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length156 ft (47.5 m)
Longest span79 ft (24.1 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,700 (2022)
Projected traffic9,120 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Co. Rd. N3680 over Cimarron Tp under built?

It was built in 1973, making it 52 years old in 2025.

What condition is Co. Rd. N3680 over Cimarron Tp under 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 March 2024.

How much traffic does Co. Rd. N3680 over Cimarron Tp under carry?

About 5,700 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Co. Rd. N3680 over Cimarron Tp under?

The structure is 156 ft (47.5 m) long with a longest span of 79 ft (24.1 m) and a deck 31 ft wide.

Who owns Co. Rd. N3680 over Cimarron Tp under?

It is owned by the State Toll Authority.