US Bridges

SR-503 over Millers Fork

Good

Darke County, Ohio · 1.41MI.N.OF Jct. SR-722 · Structure no. 1903268

Built
1993
32 years old
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
1,156
2015 count
Owner
State
State Highway Agency

About this bridge

SR-503 over Millers Fork is a prestressed concrete box beam or girders - multiple carrying SR-503 over Millers Fork in Darke County, Ohio. It was built in 1993, so it is 32 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,156 vehicles a day, roughly 8% of them trucks, projected to reach 1,605 by 2035. The structure is 59 ft (18 m) long and 34 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesSR-503
CrossesMillers Fork
Location1.41MI.N.OF Jct. SR-722
RouteState Highway 503
StateOhio
Coordinates39.95288, -84.57273
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.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJuly 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 rating44.6 US tons
Inventory rating34.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length59 ft (18 m)
Longest span58 ft (17.7 m)
Deck width34 ft (10.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,156 (2015)
Projected traffic1,605 by 2035
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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-503 over Millers Fork built?

It was built in 1993, making it 32 years old in 2025.

What condition is SR-503 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 July 2023.

How much traffic does SR-503 over Millers Fork carry?

About 1,156 vehicles per day (2015 count), of which roughly 8% are trucks.

How long is SR-503 over Millers Fork?

The structure is 59 ft (18 m) long with a longest span of 58 ft (17.7 m) and a deck 34 ft wide.

Who owns SR-503 over Millers Fork?

It is owned by the State Highway Agency.