US Bridges

Harrison ST over ST Marys River

Fair

Allen County, Indiana · 00.10 N of W Superior ST · Structure no. 0200257

Built
1915
110 years old, rebuilt 1987
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
370 ft
4 main spans
Daily traffic
4,525
2024 count
Owner
County
County Highway Agency

About this bridge

Harrison ST over ST Marys River is a prestressed concrete continuous stringer/multi-beam or girder carrying Harrison ST over ST Marys River in Allen County, Indiana. It was built in 1915 and reconstructed in 1987, so it is 110 years old, older than the Indiana average of 46.6 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 4,525 vehicles a day, roughly 5% of them trucks, projected to reach 7,500 by 2044. The structure is 370 ft (112.7 m) long and 50 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesHarrison ST
CrossesST Marys River
Location00.10 N of W Superior ST
RouteCity Street 0
CountyAllen County
StateIndiana
Coordinates41.08388, -85.14259
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.8 US tons
Inventory rating34.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length370 ft (112.7 m)
Longest span90 ft (27.4 m)
Deck width50 ft (15.3 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,525 (2024)
Projected traffic7,500 by 2044
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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 Harrison ST over ST Marys River built?

It was built in 1915, making it 110 years old in 2025. It was reconstructed in 1987.

What condition is Harrison ST over ST Marys River 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 May 2024.

How much traffic does Harrison ST over ST Marys River carry?

About 4,525 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Harrison ST over ST Marys River?

The structure is 370 ft (112.7 m) long with a longest span of 90 ft (27.4 m) and a deck 50 ft wide.

Who owns Harrison ST over ST Marys River?

It is owned by the County Highway Agency.