US Bridges

Brock-Cosmos over Stillwater Riv

Good

Darke County, Ohio · .3 MI W Staudt · Structure no. 1952285

Built
1995
30 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
31 ft
1 main span
Daily traffic
272
2015 count
Owner
County
County Highway Agency

About this bridge

Brock-Cosmos over Stillwater Riv is a prestressed concrete box beam or girders - multiple carrying Brock-Cosmos over Stillwater Riv in Darke County, Ohio. It was built in 1995, so it is 30 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 272 vehicles a day, roughly 7% of them trucks, projected to reach 378 by 2035. The structure is 31 ft (9.4 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesBrock-Cosmos
CrossesStillwater Riv
Location.3 MI W Staudt
RouteCounty Highway C0038
CountyDarke County
StateOhio
Coordinates40.26699, -84.75354
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.4 US tons
Inventory rating48.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length31 ft (9.4 m)
Longest span27 ft (8.2 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic272 (2015)
Projected traffic378 by 2035
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Brock-Cosmos over Stillwater Riv built?

It was built in 1995, making it 30 years old in 2025.

What condition is Brock-Cosmos over Stillwater Riv 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 August 2023.

How much traffic does Brock-Cosmos over Stillwater Riv carry?

About 272 vehicles per day (2015 count), of which roughly 7% are trucks.

How long is Brock-Cosmos over Stillwater Riv?

The structure is 31 ft (9.4 m) long with a longest span of 27 ft (8.2 m) and a deck 28 ft wide.

Who owns Brock-Cosmos over Stillwater Riv?

It is owned by the County Highway Agency.