US Bridges

Townline 198 over Townline 198 / Slate Run

PoorPosted for load

Huron County, Ohio · 0.1 MI N of Pontiac S L · Structure no. 3936244

Built
1959
66 years old, rebuilt 1986
Condition
Poor
inspected October 2024
Type
Truss - Thru
Steel
Length
84 ft
1 main span
Daily traffic
80
2022 count
Owner
County
County Highway Agency

About this bridge

Townline 198 over Townline 198 / Slate Run is a steel truss - thru carrying Townline 198 over Townline 198 / Slate Run in Huron County, Ohio. It was built in 1959 and reconstructed in 1986, so it is 66 years old, older than the Ohio average of 47.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 80 vehicles a day, roughly 7% of them trucks, projected to reach 450 by 2035. The structure is 84 ft (25.6 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesTownline 198
CrossesTownline 198 / Slate Run
Location0.1 MI N of Pontiac S L
RouteCounty Highway T0198
StateOhio
Coordinates41.18595, -82.73818
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating16.1 US tons
Inventory rating9.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length84 ft (25.6 m)
Longest span81 ft (24.7 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2022)
Projected traffic450 by 2035
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Townline 198 over Townline 198 / Slate Run built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1986.

What condition is Townline 198 over Townline 198 / Slate Run in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does Townline 198 over Townline 198 / Slate Run carry?

About 80 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Townline 198 over Townline 198 / Slate Run?

The structure is 84 ft (25.6 m) long with a longest span of 81 ft (24.7 m) and a deck 23 ft wide.

Who owns Townline 198 over Townline 198 / Slate Run?

It is owned by the County Highway Agency.