US Bridges

Prairie Road CR-21 over SR 73

Good

Clinton County, Ohio · .7 MI E of SR 134 · Structure no. 1402293

Built
2010
15 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
186 ft
2 main spans
Daily traffic
2,004
2015 count
Owner
State
State Highway Agency

About this bridge

Prairie Road CR-21 over SR 73 is a prestressed concrete continuous stringer/multi-beam or girder carrying Prairie Road CR-21 over SR 73 in Clinton County, Ohio. It was built in 2010, so it is 15 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 2,004 vehicles a day, roughly 5% of them trucks, projected to reach 2,782 by 2035. The structure is 186 ft (56.7 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesPrairie Road CR-21
CrossesSR 73
Location.7 MI E of SR 134
RouteCounty Highway C0021
CountyClinton County
StateOhio
Coordinates39.46033, -83.80805
Functional classUrban 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.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating76.1 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length186 ft (56.7 m)
Longest span91 ft (27.7 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,004 (2015)
Projected traffic2,782 by 2035
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Prairie Road CR-21 over SR 73 built?

It was built in 2010, making it 15 years old in 2025.

What condition is Prairie Road CR-21 over SR 73 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 Prairie Road CR-21 over SR 73 carry?

About 2,004 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Prairie Road CR-21 over SR 73?

The structure is 186 ft (56.7 m) long with a longest span of 91 ft (27.7 m) and a deck 39 ft wide.

Who owns Prairie Road CR-21 over SR 73?

It is owned by the State Highway Agency.