US Bridges

N3680 over House Creek

FairPosted for load

Pawnee County, Oklahoma · 2.5E 1.4S of Terlton · Structure no. 139160000000000

Built
1957
68 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
303 ft
3 main spans
Daily traffic
292
2022 count
Owner
County
County Highway Agency

About this bridge

N3680 over House Creek is a steel continuous stringer/multi-beam or girder carrying N3680 over House Creek in Pawnee County, Oklahoma. It was built in 1957, so it is 68 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. Its operating status is: posted for load restriction.

It carries about 292 vehicles a day, roughly 10% of them trucks, projected to reach 467 by 2042. The structure is 303 ft (92.4 m) long and 19 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesN3680
CrossesHouse Creek
Location2.5E 1.4S of Terlton
RouteCounty Highway N3680
CountyPawnee County
StateOklahoma
Coordinates36.17066, -96.44726
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
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 rating19.4 US tons
Inventory rating11.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length303 ft (92.4 m)
Longest span115 ft (35.1 m)
Deck width19 ft (5.9 m)
Roadway width16 ft (5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic292 (2022)
Projected traffic467 by 2042
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 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$896,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3680 over House Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is N3680 over House 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 August 2023.

How much traffic does N3680 over House Creek carry?

About 292 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3680 over House Creek?

The structure is 303 ft (92.4 m) long with a longest span of 115 ft (35.1 m) and a deck 19 ft wide.

Who owns N3680 over House Creek?

It is owned by the County Highway Agency.