US Bridges

SR 81 over Grass Run

Good

Hardin County, Ohio · 1.04 Mi. East of SR 235 · Structure no. 3300986

Built
1983
42 years old
Condition
Good
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
54 ft
1 main span
Daily traffic
527
2015 count
Owner
State
State Highway Agency

About this bridge

SR 81 over Grass Run is a prestressed concrete box beam or girders - multiple carrying SR 81 over Grass Run in Hardin County, Ohio. It was built in 1983, so it is 42 years old, younger than the Ohio average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 527 vehicles a day, roughly 9% of them trucks, projected to reach 731 by 2035. The structure is 54 ft (16.5 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesSR 81
CrossesGrass Run
Location1.04 Mi. East of SR 235
RouteState Highway 81
StateOhio
Coordinates40.77655, -83.80323
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJune 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating20.7 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20 + Mod
Structure length54 ft (16.5 m)
Longest span54 ft (16.5 m)
Deck width34 ft (10.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic527 (2015)
Projected traffic731 by 2035
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 81 over Grass Run built?

It was built in 1983, making it 42 years old in 2025.

What condition is SR 81 over Grass Run in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does SR 81 over Grass Run carry?

About 527 vehicles per day (2015 count), of which roughly 9% are trucks.

How long is SR 81 over Grass Run?

The structure is 54 ft (16.5 m) long with a longest span of 54 ft (16.5 m) and a deck 34 ft wide.

Who owns SR 81 over Grass Run?

It is owned by the State Highway Agency.