US Bridges

M-311(11 Mile Rd) over I-94

Fair

Calhoun County, Michigan · 0.2 MI E of I-94 Bl · Structure no. 000000000001269

Built
1960
65 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete Continuous
Length
258 ft
4 main spans
Daily traffic
2,342
2007 count
Owner
State
State Highway Agency

About this bridge

M-311(11 Mile Rd) over I-94 is a concrete continuous tee beam carrying M-311(11 Mile Rd) over I-94 in Calhoun County, Michigan. It was built in 1960, so it is 65 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 2,342 vehicles a day, roughly 2% of them trucks, projected to reach 5,662 by 2018. The structure is 258 ft (78.6 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesM-311(11 Mile Rd)
CrossesI-94
Location0.2 MI E of I-94 Bl
RouteState Highway 311
CountyCalhoun County
StateMichigan
Coordinates42.29983, -85.0816
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionAugust 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length258 ft (78.6 m)
Longest span81 ft (24.7 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,342 (2007)
Projected traffic5,662 by 2018
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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 M-311(11 Mile Rd) over I-94 built?

It was built in 1960, making it 65 years old in 2025.

What condition is M-311(11 Mile Rd) over I-94 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 August 2023.

How much traffic does M-311(11 Mile Rd) over I-94 carry?

About 2,342 vehicles per day (2007 count), of which roughly 2% are trucks.

How long is M-311(11 Mile Rd) over I-94?

The structure is 258 ft (78.6 m) long with a longest span of 81 ft (24.7 m) and a deck 33 ft wide.

Who owns M-311(11 Mile Rd) over I-94?

It is owned by the State Highway Agency.