US Bridges

US 33 over Flat Branch

Fair

Union County, Ohio · 0.43MI S of SR739 · Structure no. 8000689

Built
1987
38 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
94 ft
3 main spans
Daily traffic
15,485
2018 count
Owner
State
State Highway Agency

About this bridge

US 33 over Flat Branch is a concrete continuous slab carrying US 33 over Flat Branch in Union County, Ohio. It was built in 1987, so it is 38 years old, younger 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 15,485 vehicles a day, roughly 14% of them trucks, projected to reach 21,493 by 2038. The structure is 94 ft (28.5 m) long and 40 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesUS 33
CrossesFlat Branch
Location0.43MI S of SR739
RouteU.S. Route 33
CountyUnion County
StateOhio
Coordinates40.27805, -83.54024
Functional classRural Principal Arterial - Other

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating48.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length94 ft (28.5 m)
Longest span35 ft (10.7 m)
Deck width40 ft (12.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,485 (2018)
Projected traffic21,493 by 2038
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 33 over Flat Branch built?

It was built in 1987, making it 38 years old in 2025.

What condition is US 33 over Flat Branch 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 March 2024.

How much traffic does US 33 over Flat Branch carry?

About 15,485 vehicles per day (2018 count), of which roughly 14% are trucks.

How long is US 33 over Flat Branch?

The structure is 94 ft (28.5 m) long with a longest span of 35 ft (10.7 m) and a deck 40 ft wide.

Who owns US 33 over Flat Branch?

It is owned by the State Highway Agency.