US Bridges

SR503 over Millers Fork

Good

Preble County, Ohio · .6 MI S of Dar CO Line · Structure no. 6803997

Built
1957
68 years old, rebuilt 2005
Condition
Good
inspected March 2024
Type
Slab
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
1,074
2015 count
Owner
State
State Highway Agency

About this bridge

SR503 over Millers Fork is a concrete continuous slab carrying SR503 over Millers Fork in Preble County, Ohio. It was built in 1957 and reconstructed in 2005, so it is 68 years old, older 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 1,074 vehicles a day, roughly 11% of them trucks, projected to reach 1,491 by 2035. The structure is 100 ft (30.4 m) long and 32 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesSR503
CrossesMillers Fork
Location.6 MI S of Dar CO Line
RouteState Highway 503
CountyPreble County
StateOhio
Coordinates39.9098, -84.54121
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating65 US tons
Inventory rating50 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length100 ft (30.4 m)
Longest span35 ft (10.7 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,074 (2015)
Projected traffic1,491 by 2035
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 SR503 over Millers Fork built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2005.

What condition is SR503 over Millers 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 March 2024.

How much traffic does SR503 over Millers Fork carry?

About 1,074 vehicles per day (2015 count), of which roughly 11% are trucks.

How long is SR503 over Millers Fork?

The structure is 100 ft (30.4 m) long with a longest span of 35 ft (10.7 m) and a deck 32 ft wide.

Who owns SR503 over Millers Fork?

It is owned by the State Highway Agency.