US Bridges

SR 99 over Slate Run

Good

Huron County, Ohio · 5.75 Miles North of SR162 · Structure no. 3902404

Built
1967
58 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete Continuous
Length
125 ft
3 main spans
Daily traffic
2,022
2015 count
Owner
State
State Highway Agency

About this bridge

SR 99 over Slate Run is a concrete continuous slab carrying SR 99 over Slate Run in Huron County, Ohio. It was built in 1967, so it is 58 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 2,022 vehicles a day, roughly 17% of them trucks, projected to reach 2,807 by 2035. The structure is 125 ft (38.1 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR 99
CrossesSlate Run
Location5.75 Miles North of SR162
RouteState Highway 99
CountyHuron County
StateOhio
Coordinates41.18539, -82.72482
Functional classRural Major 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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.4 US tons
Inventory rating21.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length125 ft (38.1 m)
Longest span48 ft (14.6 m)
Deck width40 ft (12.2 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,022 (2015)
Projected traffic2,807 by 2035
Trucks17%
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

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 99 over Slate Run built?

It was built in 1967, making it 58 years old in 2025.

What condition is SR 99 over Slate Run 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 2023.

How much traffic does SR 99 over Slate Run carry?

About 2,022 vehicles per day (2015 count), of which roughly 17% are trucks.

How long is SR 99 over Slate Run?

The structure is 125 ft (38.1 m) long with a longest span of 48 ft (14.6 m) and a deck 40 ft wide.

Who owns SR 99 over Slate Run?

It is owned by the State Highway Agency.