US Bridges

SR 66 over Mattock Ditch

FairPosted for load

Defiance County, Ohio · 4.1 Mi. North of USR24. · Structure no. 2001748

Built
1961
64 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete Continuous
Length
54 ft
3 main spans
Daily traffic
3,271
2015 count
Owner
State
State Highway Agency

About this bridge

SR 66 over Mattock Ditch is a concrete continuous slab carrying SR 66 over Mattock Ditch in Defiance County, Ohio. It was built in 1961, so it is 64 years old, older than the Ohio average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 3,271 vehicles a day, roughly 10% of them trucks, projected to reach 4,540 by 2035. The structure is 54 ft (16.4 m) long and 44 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesSR 66
CrossesMattock Ditch
Location4.1 Mi. North of USR24.
RouteState Highway 66
CountyDefiance County
StateOhio
Coordinates41.36657, -84.3608
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length54 ft (16.4 m)
Longest span20 ft (6.1 m)
Deck width44 ft (13.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,271 (2015)
Projected traffic4,540 by 2035
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 Mattock Ditch built?

It was built in 1961, making it 64 years old in 2025.

What condition is SR 66 over Mattock Ditch in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does SR 66 over Mattock Ditch carry?

About 3,271 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is SR 66 over Mattock Ditch?

The structure is 54 ft (16.4 m) long with a longest span of 20 ft (6.1 m) and a deck 44 ft wide.

Who owns SR 66 over Mattock Ditch?

It is owned by the State Highway Agency.