US Bridges

N3690 over Little River

FairPosted for load

Hughes County, Oklahoma · 1.6 S of Spaulding · Structure no. 141780000000000

Built
1958
67 years old
Condition
Fair
inspected August 2024
Type
Truss - Thru
Steel
Length
264 ft
1 main span
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N3690 over Little River is a steel truss - thru carrying N3690 over Little River in Hughes County, Oklahoma. It was built in 1958, so it is 67 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 100 vehicles a day, roughly 15% of them trucks, projected to reach 160 by 2042. The structure is 264 ft (80.4 m) long and 19 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesN3690
CrossesLittle River
Location1.6 S of Spaulding
RouteCounty Highway N3690
CountyHughes County
StateOklahoma
Coordinates34.99175, -96.44148
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating24.4 US tons
Inventory rating16.3 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+1 approach)
Design loadHS 20
Structure length264 ft (80.4 m)
Longest span210 ft (64 m)
Deck width19 ft (5.8 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deck15 ft (4.5 m)

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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$832,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3690 over Little River built?

It was built in 1958, making it 67 years old in 2025.

What condition is N3690 over Little River 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 2024.

How much traffic does N3690 over Little River carry?

About 100 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N3690 over Little River?

The structure is 264 ft (80.4 m) long with a longest span of 210 ft (64 m) and a deck 19 ft wide.

Who owns N3690 over Little River?

It is owned by the County Highway Agency.