US Bridges

M-143 E Mich Ave over Grand River

Fair

Ingham County, Michigan · 0.3 MI E of the Capitol · Structure no. 000000000003693

Built
1975
50 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
234 ft
2 main spans
Daily traffic
8,009
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

M-143 E Mich Ave over Grand River is a steel stringer/multi-beam or girder carrying M-143 E Mich Ave over Grand River in Ingham County, Michigan. It was built in 1975, so it is 50 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 8,009 vehicles a day, roughly 3% of them trucks, projected to reach 10,910 by 2018. The structure is 234 ft (71.3 m) long and 103 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesM-143 E Mich Ave
CrossesGrand River
Location0.3 MI E of the Capitol
RouteState Highway 143
CountyIngham County
StateMichigan
Coordinates42.73364, -84.54936
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
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 rating78.3 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length234 ft (71.3 m)
Longest span117 ft (35.7 m)
Deck width103 ft (31.4 m)
Roadway width74 ft (22.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,009 (2015)
Projected traffic10,910 by 2018
Trucks3%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 proposedDeck replacement with only incidental widening
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-143 E Mich Ave over Grand River built?

It was built in 1975, making it 50 years old in 2025.

What condition is M-143 E Mich Ave 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 July 2024.

How much traffic does M-143 E Mich Ave over Grand River carry?

About 8,009 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is M-143 E Mich Ave over Grand River?

The structure is 234 ft (71.3 m) long with a longest span of 117 ft (35.7 m) and a deck 103 ft wide.

Who owns M-143 E Mich Ave over Grand River?

It is owned by the City or Municipal Highway Agency.