US Bridges

S.H. 11 over Chikaskia River Oflow

Fair

Kay County, Oklahoma · 1.1 MI E JCT US 177 · Structure no. 179190000000000

Built
1970
55 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete
Length
225 ft
9 main spans
Daily traffic
2,600
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 11 over Chikaskia River Oflow is a concrete slab carrying S.H. 11 over Chikaskia River Oflow in Kay County, Oklahoma. It was built in 1970, so it is 55 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.

It carries about 2,600 vehicles a day, roughly 16% of them trucks, projected to reach 4,160 by 2042. The structure is 225 ft (68.6 m) long and 46 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesS.H. 11
CrossesChikaskia River Oflow
Location1.1 MI E JCT US 177
RouteState Highway 11
CountyKay County
StateOklahoma
Coordinates36.81164, -97.26321
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length225 ft (68.6 m)
Longest span25 ft (7.6 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,600 (2022)
Projected traffic4,160 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
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$2.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 11 over Chikaskia River Oflow built?

It was built in 1970, making it 55 years old in 2025.

What condition is S.H. 11 over Chikaskia River Oflow 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 2023.

How much traffic does S.H. 11 over Chikaskia River Oflow carry?

About 2,600 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is S.H. 11 over Chikaskia River Oflow?

The structure is 225 ft (68.6 m) long with a longest span of 25 ft (7.6 m) and a deck 46 ft wide.

Who owns S.H. 11 over Chikaskia River Oflow?

It is owned by the State Highway Agency.