US Bridges

M-121 WB over Rush Creek

Fair

Ottawa County, Michigan · 3.7 MI SW of Kent CO Line · Structure no. 000000000008714

Built
1972
53 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
7,552
2007 count
Owner
State
State Highway Agency

About this bridge

M-121 WB over Rush Creek is a steel stringer/multi-beam or girder carrying M-121 WB over Rush Creek in Ottawa County, Michigan. It was built in 1972, so it is 53 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 7,552 vehicles a day, roughly 8% of them trucks, projected to reach 9,582 by 2018. The structure is 57 ft (17.3 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-121 WB
CrossesRush Creek
Location3.7 MI SW of Kent CO Line
RouteState Highway 121
CountyOttawa County
StateMichigan
Coordinates42.88061, -85.84363
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.6 US tons
Inventory rating58.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length57 ft (17.3 m)
Longest span57 ft (17.3 m)
Deck width41 ft (12.6 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,552 (2007)
Projected traffic9,582 by 2018
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-121 WB over Rush Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is M-121 WB over Rush 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 April 2024.

How much traffic does M-121 WB over Rush Creek carry?

About 7,552 vehicles per day (2007 count), of which roughly 8% are trucks.

How long is M-121 WB over Rush Creek?

The structure is 57 ft (17.3 m) long with a longest span of 57 ft (17.3 m) and a deck 41 ft wide.

Who owns M-121 WB over Rush Creek?

It is owned by the State Highway Agency.