US Bridges

C311B Treaty Line over Bokes Creek

Fair

Union County, Ohio · 3.1 MI West of SR 31 · Structure no. 8030820

Built
1975
50 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
85 ft
3 main spans
Daily traffic
441
2015 count
Owner
County
County Highway Agency

About this bridge

C311B Treaty Line over Bokes Creek is a concrete continuous slab carrying C311B Treaty Line over Bokes Creek in Union County, Ohio. It was built in 1975, so it is 50 years old, older than the Ohio average of 47.3 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 441 vehicles a day, roughly 7% of them trucks, projected to reach 612 by 2041. The structure is 85 ft (25.9 m) long and 28 ft wide.

CarriesC311B Treaty Line
CrossesBokes Creek
Location3.1 MI West of SR 31
RouteCounty Highway C0311
StateOhio
Coordinates40.4385, -83.50623
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 12 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.2 US tons
Inventory rating21.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length85 ft (25.9 m)
Longest span31 ft (9.4 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic441 (2015)
Projected traffic612 by 2041
Trucks7%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was C311B Treaty Line over Bokes Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is C311B Treaty Line over Bokes Creek 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 C311B Treaty Line over Bokes Creek carry?

About 441 vehicles per day (2015 count), of which roughly 7% are trucks.

How long is C311B Treaty Line over Bokes Creek?

The structure is 85 ft (25.9 m) long with a longest span of 31 ft (9.4 m) and a deck 28 ft wide.

Who owns C311B Treaty Line over Bokes Creek?

It is owned by the County Highway Agency.