US Bridges

Stockbridge Street over Portage Creek

Fair

Kalamazoo County, Michigan · In Kalamazoo · Structure no. 000000000004670

Built
1983
42 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
27 ft
1 main span
Daily traffic
6,552
1998 count
Owner
City
City or Municipal Highway Agency

About this bridge

Stockbridge Street over Portage Creek is a prestressed concrete box beam or girders - multiple carrying Stockbridge Street over Portage Creek in Kalamazoo County, Michigan. It was built in 1983, so it is 42 years old, younger than the Michigan average of 48.3 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 6,552 vehicles a day, roughly 5% of them trucks, projected to reach 8,518 by 2018. The structure is 27 ft (8.2 m) long and 52 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesStockbridge Street
CrossesPortage Creek
LocationIn Kalamazoo
RouteCity Street 2005
Coordinates42.27751, -85.577
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating76.8 US tons
Inventory rating46.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length27 ft (8.2 m)
Longest span23 ft (7 m)
Deck width52 ft (15.8 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,552 (1998)
Projected traffic8,518 by 2018
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Stockbridge Street over Portage Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is Stockbridge Street over Portage Creek 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 July 2024.

How much traffic does Stockbridge Street over Portage Creek carry?

About 6,552 vehicles per day (1998 count), of which roughly 5% are trucks.

How long is Stockbridge Street over Portage Creek?

The structure is 27 ft (8.2 m) long with a longest span of 23 ft (7 m) and a deck 52 ft wide.

Who owns Stockbridge Street over Portage Creek?

It is owned by the City or Municipal Highway Agency.