US Bridges

SR 309 over Auglaize River

Good

Allen County, Ohio · East of US 30 Connector · Structure no. 0200859

Built
1990
35 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
206 ft
3 main spans
Daily traffic
10,224
2015 count
Owner
State
State Highway Agency

About this bridge

SR 309 over Auglaize River is a prestressed concrete continuous box beam or girders - multiple carrying SR 309 over Auglaize River in Allen County, Ohio. It was built in 1990, so it is 35 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10,224 vehicles a day, roughly 6% of them trucks, projected to reach 14,191 by 2035. The structure is 206 ft (62.9 m) long and 44 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesSR 309
CrossesAuglaize River
LocationEast of US 30 Connector
RouteState Highway 309
StateOhio
Coordinates40.81869, -84.27456
Functional classRural 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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating45.3 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckOther
Main spans3
Design loadHS 20 + Mod
Structure length206 ft (62.9 m)
Longest span67 ft (20.3 m)
Deck width44 ft (13.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,224 (2015)
Projected traffic14,191 by 2035
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 309 over Auglaize River built?

It was built in 1990, making it 35 years old in 2025.

What condition is SR 309 over Auglaize 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 October 2023.

How much traffic does SR 309 over Auglaize River carry?

About 10,224 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is SR 309 over Auglaize River?

The structure is 206 ft (62.9 m) long with a longest span of 67 ft (20.3 m) and a deck 44 ft wide.

Who owns SR 309 over Auglaize River?

It is owned by the State Highway Agency.