US Bridges

Co. Rd. N3620 over Cimarron Tp under

Fair

Pawnee County, Oklahoma · 1 MI E SH 99 · Structure no. 185180000000000

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

About this bridge

Co. Rd. N3620 over Cimarron Tp under is a prestressed concrete stringer/multi-beam or girder carrying Co. Rd. N3620 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 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 5,700 vehicles a day, roughly 15% of them trucks, projected to reach 9,120 by 2042. The structure is 158 ft (48.2 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCo. Rd. N3620
CrossesCimarron Tp under
Location1 MI E SH 99
RouteCounty Highway N3620
CountyPawnee County
StateOklahoma
Coordinates36.21948, -96.5532
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating55.7 US tons
Inventory rating30.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length158 ft (48.2 m)
Longest span80 ft (24.4 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 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. N3620 over Cimarron Tp under built?

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

What condition is Co. Rd. N3620 over Cimarron Tp under 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 March 2024.

How much traffic does Co. Rd. N3620 over Cimarron Tp under carry?

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

How long is Co. Rd. N3620 over Cimarron Tp under?

The structure is 158 ft (48.2 m) long with a longest span of 80 ft (24.4 m) and a deck 27 ft wide.

Who owns Co. Rd. N3620 over Cimarron Tp under?

It is owned by the State Toll Authority.