US Bridges

Darke-Mercer over Mile Creek

Good

Darke County, Ohio · .3 MI W of Whiterd · Structure no. 1955039

Built
1980
45 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
48 ft
1 main span
Daily traffic
1,220
2015 count
Owner
County
County Highway Agency

About this bridge

Darke-Mercer over Mile Creek is a prestressed concrete box beam or girders - multiple carrying Darke-Mercer over Mile Creek in Darke County, Ohio. It was built in 1980, so it is 45 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 1,220 vehicles a day, roughly 8% of them trucks, projected to reach 1,693 by 2035. The structure is 48 ft (14.6 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesDarke-Mercer
CrossesMile Creek
Location.3 MI W of Whiterd
RouteCounty Highway C0007
StateOhio
Coordinates40.35333, -84.55861
Functional classRural Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating69.3 US tons
Inventory rating41.4 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length48 ft (14.6 m)
Longest span44 ft (13.4 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,220 (2015)
Projected traffic1,693 by 2035
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Darke-Mercer over Mile Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is Darke-Mercer over Mile Creek 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 September 2023.

How much traffic does Darke-Mercer over Mile Creek carry?

About 1,220 vehicles per day (2015 count), of which roughly 8% are trucks.

How long is Darke-Mercer over Mile Creek?

The structure is 48 ft (14.6 m) long with a longest span of 44 ft (13.4 m) and a deck 24 ft wide.

Who owns Darke-Mercer over Mile Creek?

It is owned by the County Highway Agency.