US Bridges

SR-66 over Koop Creek

Good

Auglaize County, Ohio · 1.26 Mi. S.Of Jct. SR-29 · Structure no. 0600962

Built
1960
65 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete Continuous
Length
114 ft
3 main spans
Daily traffic
7,589
2015 count
Owner
State
State Highway Agency

About this bridge

SR-66 over Koop Creek is a concrete continuous slab carrying SR-66 over Koop Creek in Auglaize County, Ohio. It was built in 1960, so it is 65 years old, older 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 7,589 vehicles a day, roughly 9% of them trucks, projected to reach 10,534 by 2035. The structure is 114 ft (34.7 m) long and 44 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesSR-66
CrossesKoop Creek
Location1.26 Mi. S.Of Jct. SR-29
RouteState Highway 66
StateOhio
Coordinates40.52566, -84.37988
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating42.1 US tons
Inventory rating27.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length114 ft (34.7 m)
Longest span43 ft (13.1 m)
Deck width44 ft (13.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,589 (2015)
Projected traffic10,534 by 2035
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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-66 over Koop Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is SR-66 over Koop 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 April 2024.

How much traffic does SR-66 over Koop Creek carry?

About 7,589 vehicles per day (2015 count), of which roughly 9% are trucks.

How long is SR-66 over Koop Creek?

The structure is 114 ft (34.7 m) long with a longest span of 43 ft (13.1 m) and a deck 44 ft wide.

Who owns SR-66 over Koop Creek?

It is owned by the State Highway Agency.