US Bridges

Black Run RD over Mine Run

Fair

Ross County, Ohio · 1.75 Mi. NW of SR-772 · Structure no. 7140576

Built
1941
84 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
719
2015 count
Owner
County
County Highway Agency

About this bridge

Black Run RD over Mine Run is a concrete slab carrying Black Run RD over Mine Run in Ross County, Ohio. It was built in 1941, so it is 84 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 719 vehicles a day, roughly 8% of them trucks, projected to reach 998 by 2035. The structure is 27 ft (8.2 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesBlack Run RD
CrossesMine Run
Location1.75 Mi. NW of SR-772
RouteCounty Highway C0161
CountyRoss County
StateOhio
Coordinates39.23801, -83.11254
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 inspectionOctober 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width25 ft (7.6 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic719 (2015)
Projected traffic998 by 2035
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
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 Black Run RD over Mine Run built?

It was built in 1941, making it 84 years old in 2025.

What condition is Black Run RD over Mine Run 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 2024.

How much traffic does Black Run RD over Mine Run carry?

About 719 vehicles per day (2015 count), of which roughly 8% are trucks.

How long is Black Run RD over Mine Run?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 25 ft wide.

Who owns Black Run RD over Mine Run?

It is owned by the County Highway Agency.