US Bridges

Bridge Street over Grand River

Fair

Eaton County, Michigan · In Dimondale · Structure no. 000000000002440

Built
1932
93 years old, rebuilt 1987
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
182 ft
3 main spans
Daily traffic
2,570
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bridge Street over Grand River is a steel stringer/multi-beam or girder carrying Bridge Street over Grand River in Eaton County, Michigan. It was built in 1932 and reconstructed in 1987, so it is 93 years old, older 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 6 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 2,570 vehicles a day, projected to reach 3,821 by 2040. The structure is 182 ft (55.6 m) long and 47 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesBridge Street
CrossesGrand River
LocationIn Dimondale
RouteCity Street 2003
CountyEaton County
StateMichigan
Coordinates42.64495, -84.64999
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating42.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length182 ft (55.6 m)
Longest span60 ft (18.2 m)
Deck width47 ft (14.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,570 (2020)
Projected traffic3,821 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Bridge Street over Grand River built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1987.

What condition is Bridge Street over Grand 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 2023.

How much traffic does Bridge Street over Grand River carry?

About 2,570 vehicles per day (2020 count).

How long is Bridge Street over Grand River?

The structure is 182 ft (55.6 m) long with a longest span of 60 ft (18.2 m) and a deck 47 ft wide.

Who owns Bridge Street over Grand River?

It is owned by the City or Municipal Highway Agency.