US Bridges

N3660 over Cedar Creek

Fair

Pawnee County, Oklahoma · .2S .9W .2S of Cleveland · Structure no. 155620000000000

Built
1962
63 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
232 ft
4 main spans
Daily traffic
200
2022 count
Owner
County
County Highway Agency

About this bridge

N3660 over Cedar Creek is a steel stringer/multi-beam or girder carrying N3660 over Cedar Creek in Pawnee County, Oklahoma. It was built in 1962, so it is 63 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 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 200 vehicles a day, roughly 10% of them trucks, projected to reach 320 by 2042. The structure is 232 ft (70.7 m) long and 19 ft wide. If it were closed, the detour would be 10.6 mi (17 km).

Location

Open in Google Maps
CarriesN3660
CrossesCedar Creek
Location.2S .9W .2S of Cleveland
RouteCounty Highway N3660
CountyPawnee County
StateOklahoma
Coordinates36.3001, -96.4786
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.2 US tons
Inventory rating31.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length232 ft (70.7 m)
Longest span70 ft (21.3 m)
Deck width19 ft (5.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2022)
Projected traffic320 by 2042
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed10.6 mi (17 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$775,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3660 over Cedar Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is N3660 over Cedar 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 July 2023.

How much traffic does N3660 over Cedar Creek carry?

About 200 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3660 over Cedar Creek?

The structure is 232 ft (70.7 m) long with a longest span of 70 ft (21.3 m) and a deck 19 ft wide.

Who owns N3660 over Cedar Creek?

It is owned by the County Highway Agency.