US Bridges

3674C over Kaw Lake

Fair

Kay County, Oklahoma · .5E Washunga Bay · Structure no. 166380000000000

Built
1965
60 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
600 ft
6 main spans
Daily traffic
135
2022 count
Owner
County
County Highway Agency

About this bridge

3674C over Kaw Lake is a prestressed concrete stringer/multi-beam or girder carrying 3674C over Kaw Lake in Kay County, Oklahoma. It was built in 1965, so it is 60 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.

It carries about 135 vehicles a day, roughly 15% of them trucks, projected to reach 216 by 2042. The structure is 600 ft (182.9 m) long and 32 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
Carries3674C
CrossesKaw Lake
Location.5E Washunga Bay
RouteCounty Highway E0150
CountyKay County
StateOklahoma
Coordinates36.79766, -96.83003
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.1 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length600 ft (182.9 m)
Longest span100 ft (30.5 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic135 (2022)
Projected traffic216 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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$1.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was 3674C over Kaw Lake built?

It was built in 1965, making it 60 years old in 2025.

What condition is 3674C over Kaw Lake 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 October 2024.

How much traffic does 3674C over Kaw Lake carry?

About 135 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 3674C over Kaw Lake?

The structure is 600 ft (182.9 m) long with a longest span of 100 ft (30.5 m) and a deck 32 ft wide.

Who owns 3674C over Kaw Lake?

It is owned by the County Highway Agency.