US Bridges

SR 4 over Rocky Fork

Good

Marion County, Ohio · 1.48 MI N. of US23 · Structure no. 5100224

Built
1988
37 years old
Condition
Good
inspected January 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
4,905
2015 count
Owner
State
State Highway Agency

About this bridge

SR 4 over Rocky Fork is a prestressed concrete box beam or girders - multiple carrying SR 4 over Rocky Fork in Marion County, Ohio. It was built in 1988, so it is 37 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 4,905 vehicles a day, roughly 10% of them trucks, projected to reach 6,808 by 2035. The structure is 59 ft (18 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 4
CrossesRocky Fork
Location1.48 MI N. of US23
RouteState Highway 4
CountyMarion County
StateOhio
Coordinates40.6828, -83.09754
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating43.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length59 ft (18 m)
Longest span55 ft (16.8 m)
Deck width40 ft (12.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,905 (2015)
Projected traffic6,808 by 2035
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 4 over Rocky Fork built?

It was built in 1988, making it 37 years old in 2025.

What condition is SR 4 over Rocky Fork 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 January 2023.

How much traffic does SR 4 over Rocky Fork carry?

About 4,905 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is SR 4 over Rocky Fork?

The structure is 59 ft (18 m) long with a longest span of 55 ft (16.8 m) and a deck 40 ft wide.

Who owns SR 4 over Rocky Fork?

It is owned by the State Highway Agency.