US Bridges

M-45 WB over Grand River

Fair

Ottawa County, Michigan · Tallmadge Twp Sec 20-29 · Structure no. 000000000012853

Built
1999
26 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,595 ft
11 main spans
Daily traffic
9,698
2007 count
Owner
State
State Highway Agency

About this bridge

M-45 WB over Grand River is a prestressed concrete stringer/multi-beam or girder carrying M-45 WB over Grand River in Ottawa County, Michigan. It was built in 1999, so it is 26 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 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 9,698 vehicles a day, roughly 4% of them trucks, projected to reach 13,669 by 2018. The structure is 1,595 ft (486.2 m) long and 46 ft wide.

Location

Open in Google Maps
CarriesM-45 WB
CrossesGrand River
LocationTallmadge Twp Sec 20-29
RouteState Highway 45
CountyOttawa County
StateMichigan
Coordinates42.97221, -85.87599
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.8 US tons
Inventory rating26.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans11
Design loadHS 25 or greater
Structure length1,595 ft (486.2 m)
Longest span145 ft (44.2 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,698 (2007)
Projected traffic13,669 by 2018
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was M-45 WB over Grand River built?

It was built in 1999, making it 26 years old in 2025.

What condition is M-45 WB 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 June 2024.

How much traffic does M-45 WB over Grand River carry?

About 9,698 vehicles per day (2007 count), of which roughly 4% are trucks.

How long is M-45 WB over Grand River?

The structure is 1,595 ft (486.2 m) long with a longest span of 145 ft (44.2 m) and a deck 46 ft wide.

Who owns M-45 WB over Grand River?

It is owned by the State Highway Agency.