US Bridges

N3990 over Coon Creek Trib.

Good

Washington County, Oklahoma · 2E .3S of Dewey · Structure no. 323410000000000

Built
2022
3 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
38 ft
3 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N3990 over Coon Creek Trib. is a concrete culvert carrying N3990 over Coon Creek Trib. in Washington County, Oklahoma. It was built in 2022, so it is 3 years old, younger 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 38 ft (11.6 m) long and 51 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesN3990
CrossesCoon Creek Trib.
Location2E .3S of Dewey
RouteCounty Highway N3990
Coordinates36.77968, -95.89911
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating71.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width51 ft (15.5 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was N3990 over Coon Creek Trib. built?

It was built in 2022, making it 3 years old in 2025.

What condition is N3990 over Coon Creek Trib. 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 October 2024.

How much traffic does N3990 over Coon Creek Trib. carry?

About 100 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3990 over Coon Creek Trib.?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m) and a deck 51 ft wide.

Who owns N3990 over Coon Creek Trib.?

It is owned by the County Highway Agency.