US Bridges

Thayer Rd. over Ottawa River Thayer RD

Fair

Allen County, Ohio · 0.13 MI N of SR 81 · Structure no. 0236950

Built
1984
41 years old
Condition
Fair
inspected September 2024
Type
Truss - Thru
Steel
Length
115 ft
1 main span
Daily traffic
1,671
2015 count
Owner
County
County Highway Agency

About this bridge

Thayer Rd. over Ottawa River Thayer RD is a steel truss - thru carrying Thayer Rd. over Ottawa River Thayer RD in Allen County, Ohio. It was built in 1984, so it is 41 years old, younger 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,671 vehicles a day, roughly 5% of them trucks, projected to reach 2,319 by 2035. The structure is 115 ft (35.1 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesThayer Rd.
CrossesOttawa River Thayer RD
Location0.13 MI N of SR 81
RouteCounty Highway T0173
CountyAllen County
StateOhio
Coordinates40.76552, -84.01289
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 12 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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckOther
Main spans1
Design loadHS 20
Structure length115 ft (35.1 m)
Longest span110 ft (33.5 m)
Deck width34 ft (10.4 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,671 (2015)
Projected traffic2,319 by 2035
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Thayer Rd. over Ottawa River Thayer RD built?

It was built in 1984, making it 41 years old in 2025.

What condition is Thayer Rd. over Ottawa River Thayer RD 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 September 2024.

How much traffic does Thayer Rd. over Ottawa River Thayer RD carry?

About 1,671 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Thayer Rd. over Ottawa River Thayer RD?

The structure is 115 ft (35.1 m) long with a longest span of 110 ft (33.5 m) and a deck 34 ft wide.

Who owns Thayer Rd. over Ottawa River Thayer RD?

It is owned by the County Highway Agency.