US Bridges

US 27 NB over ST Marys River

Good

Allen County, Indiana · 02.60 S SR 930 · Structure no. 007490

Built
1959
66 years old, rebuilt 2023
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
313 ft
4 main spans
Daily traffic
20,087
2019 count
Owner
State
State Highway Agency

About this bridge

US 27 NB over ST Marys River is a steel continuous stringer/multi-beam or girder carrying US 27 NB over ST Marys River in Allen County, Indiana. It was built in 1959 and reconstructed in 2023, so it is 66 years old, older than the Indiana average of 46.6 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 20,087 vehicles a day, roughly 14% of them trucks, projected to reach 46,885 by 2034. The structure is 313 ft (95.3 m) long and 61 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesUS 27 NB
CrossesST Marys River
Location02.60 S SR 930
RouteU.S. Route 27
StateIndiana
Coordinates41.08368, -85.1358
Functional classUrban Other Principal 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length313 ft (95.3 m)
Longest span84 ft (25.6 m)
Deck width61 ft (18.7 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,087 (2019)
Projected traffic46,885 by 2034
Trucks14%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 US 27 NB over ST Marys River built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2023.

What condition is US 27 NB 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 April 2024.

How much traffic does US 27 NB over ST Marys River carry?

About 20,087 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is US 27 NB over ST Marys River?

The structure is 313 ft (95.3 m) long with a longest span of 84 ft (25.6 m) and a deck 61 ft wide.

Who owns US 27 NB over ST Marys River?

It is owned by the State Highway Agency.