US Bridges

Co. Rd. 3604C over I-35 under

FairPosted for load

Kay County, Oklahoma · Okla-Kan S/L · Structure no. 141570000000000

Built
1958
67 years old
Condition
Fair
inspected August 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
174 ft
4 main spans
Daily traffic
50
2022 count
Owner
State
State Highway Agency

About this bridge

Co. Rd. 3604C over I-35 under is a steel continuous girder and floorbeam system carrying Co. Rd. 3604C over I-35 under in Kay 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 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 50 vehicles a day, roughly 30% of them trucks, projected to reach 80 by 2042. The structure is 174 ft (53 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCo. Rd. 3604C
CrossesI-35 under
LocationOkla-Kan S/L
RouteCounty Highway 3604C
CountyKay County
StateOklahoma
Coordinates36.99883, -97.34299
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38.6 US tons
Inventory rating23.1 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length174 ft (53 m)
Longest span47 ft (14.3 m)
Deck width25 ft (7.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic80 by 2042
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$1.9 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Co. Rd. 3604C over I-35 under built?

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

What condition is Co. Rd. 3604C over I-35 under 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 2023.

How much traffic does Co. Rd. 3604C over I-35 under carry?

About 50 vehicles per day (2022 count), of which roughly 30% are trucks.

How long is Co. Rd. 3604C over I-35 under?

The structure is 174 ft (53 m) long with a longest span of 47 ft (14.3 m) and a deck 25 ft wide.

Who owns Co. Rd. 3604C over I-35 under?

It is owned by the State Highway Agency.