US Bridges

SR-503 over Branch of Millers Fork

Good

Darke County, Ohio · 1.6MI.N. of Preble County · Structure no. 1903209

Built
1988
37 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
1,350
2015 count
Owner
State
State Highway Agency

About this bridge

SR-503 over Branch of Millers Fork is a concrete culvert carrying SR-503 over Branch of Millers Fork in Darke 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 1,350 vehicles a day, roughly 9% of them trucks, projected to reach 1,874 by 2035. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 18 mi (29 km).

CarriesSR-503
CrossesBranch of Millers Fork
Location1.6MI.N. of Preble County
RouteState Highway 503
StateOhio
Coordinates39.93905, -84.55451
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating62.8 US tons
Inventory rating37.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length22 ft (6.7 m)
Longest span21 ft (6.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,350 (2015)
Projected traffic1,874 by 2035
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 Branch of Millers Fork built?

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

What condition is SR-503 over Branch of 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 Branch of Millers Fork carry?

About 1,350 vehicles per day (2015 count), of which roughly 9% are trucks.

How long is SR-503 over Branch of Millers Fork?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m).

Who owns SR-503 over Branch of Millers Fork?

It is owned by the State Highway Agency.