US Bridges

SR-29 over St. Marys River

Good

Auglaize County, Ohio · .11MI. E. of Jct. SR-66 · Structure no. 0600032

Built
1926
99 years old, rebuilt 1993
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
92 ft
1 main span
Daily traffic
5,474
2015 count
Owner
State
State Highway Agency

About this bridge

SR-29 over St. Marys River is a steel stringer/multi-beam or girder carrying SR-29 over St. Marys River in Auglaize County, Ohio. It was built in 1926 and reconstructed in 1993, so it is 99 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 5,474 vehicles a day, roughly 5% of them trucks, projected to reach 7,598 by 2035. The structure is 92 ft (28 m) long and 95 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR-29
CrossesSt. Marys River
Location.11MI. E. of Jct. SR-66
RouteState Highway 29
CountyAuglaize County
StateOhio
Coordinates40.54302, -84.38838
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length92 ft (28 m)
Longest span86 ft (26.2 m)
Deck width95 ft (28.9 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,474 (2015)
Projected traffic7,598 by 2035
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$400,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR-29 over St. Marys River built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1993.

What condition is SR-29 over St. Marys River 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 July 2024.

How much traffic does SR-29 over St. Marys River carry?

About 5,474 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is SR-29 over St. Marys River?

The structure is 92 ft (28 m) long with a longest span of 86 ft (26.2 m) and a deck 95 ft wide.

Who owns SR-29 over St. Marys River?

It is owned by the State Highway Agency.