US Bridges

I-69 SB over M-60

Fair

Calhoun County, Michigan · @ M-60 · Structure no. 000000000001225

Built
1968
57 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
111 ft
3 main spans
Daily traffic
11,162
2007 count
Owner
State
State Highway Agency

About this bridge

I-69 SB over M-60 is a steel stringer/multi-beam or girder carrying I-69 SB over M-60 in Calhoun County, Michigan. It was built in 1968, so it is 57 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 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 11,162 vehicles a day, roughly 33% of them trucks, projected to reach 14,169 by 2018. The structure is 111 ft (33.8 m) long and 42 ft wide.

Location

Open in Google Maps
CarriesI-69 SB
CrossesM-60
Location@ M-60
RouteInterstate 69
CountyCalhoun County
StateMichigan
Coordinates42.10585, -84.99634
Functional classRural Principal Arterial - Interstate

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating59 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length111 ft (33.8 m)
Longest span45 ft (13.7 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,162 (2007)
Projected traffic14,169 by 2018
Trucks33%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-69 SB over M-60 built?

It was built in 1968, making it 57 years old in 2025.

What condition is I-69 SB over M-60 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 2023.

How much traffic does I-69 SB over M-60 carry?

About 11,162 vehicles per day (2007 count), of which roughly 33% are trucks.

How long is I-69 SB over M-60?

The structure is 111 ft (33.8 m) long with a longest span of 45 ft (13.7 m) and a deck 42 ft wide.

Who owns I-69 SB over M-60?

It is owned by the State Highway Agency.