US Bridges

N3990 over Fish Creek

Poor

Washington County, Oklahoma · 2. E 1.7 S of US 60 · Structure no. 194260000000000

Built
1978
47 years old
Condition
Poor
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
88
2022 count
Owner
County
County Highway Agency

About this bridge

N3990 over Fish Creek is a prestressed concrete tee beam carrying N3990 over Fish Creek in Washington County, Oklahoma. It was built in 1978, so it is 47 years old, younger than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 88 vehicles a day, roughly 10% of them trucks, projected to reach 141 by 2042. The structure is 49 ft (14.9 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesN3990
CrossesFish Creek
Location2. E 1.7 S of US 60
RouteCounty Highway N3990
Coordinates36.70318, -95.89927
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length49 ft (14.9 m)
Longest span46 ft (14 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic88 (2022)
Projected traffic141 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$335,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3990 over Fish Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is N3990 over Fish Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does N3990 over Fish Creek carry?

About 88 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3990 over Fish Creek?

The structure is 49 ft (14.9 m) long with a longest span of 46 ft (14 m) and a deck 24 ft wide.

Who owns N3990 over Fish Creek?

It is owned by the County Highway Agency.