US Bridges

N3870 over Creek

FairPosted for load

Creek County, Oklahoma · 7S of Sapulpa · Structure no. 082580000000000

Built
1940
85 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
36 ft
3 main spans
Daily traffic
1,350
2022 count
Owner
County
County Highway Agency

About this bridge

N3870 over Creek is a concrete slab carrying N3870 over Creek in Creek County, Oklahoma. It was built in 1940, so it is 85 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. Its operating status is: posted for load restriction.

It carries about 1,350 vehicles a day, roughly 15% of them trucks, projected to reach 2,160 by 2042. The structure is 36 ft (11 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN3870
CrossesCreek
Location7S of Sapulpa
RouteCounty Highway N3870
CountyCreek County
StateOklahoma
Coordinates35.90425, -96.11901
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.5 US tons
Inventory rating17.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length36 ft (11 m)
Longest span10 ft (3 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,350 (2022)
Projected traffic2,160 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$303,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3870 over Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is N3870 over 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 2024.

How much traffic does N3870 over Creek carry?

About 1,350 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N3870 over Creek?

The structure is 36 ft (11 m) long with a longest span of 10 ft (3 m) and a deck 28 ft wide.

Who owns N3870 over Creek?

It is owned by the County Highway Agency.