US Bridges

29 Mile Road over I-94

Fair

Calhoun County, Michigan · 1.0 MI W of Jackson Col · Structure no. 000000000001286

Built
1960
65 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete Continuous
Length
227 ft
4 main spans
Daily traffic
2,053
1995 count
Owner
State
State Highway Agency

About this bridge

29 Mile Road over I-94 is a concrete continuous tee beam carrying 29 Mile Road 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 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 2,053 vehicles a day, roughly 3% of them trucks, projected to reach 2,361 by 2000. The structure is 227 ft (69.2 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries29 Mile Road
CrossesI-94
Location1.0 MI W of Jackson Col
RouteCounty Highway 0
CountyCalhoun County
StateMichigan
Coordinates42.2647, -84.7368
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment7: Better than present minimum criteria
Operating rating58.5 US tons
Inventory rating35.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length227 ft (69.2 m)
Longest span71 ft (21.6 m)
Deck width36 ft (11.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,053 (1995)
Projected traffic2,361 by 2000
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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$94,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was 29 Mile Road over I-94 built?

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

What condition is 29 Mile Road 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 29 Mile Road over I-94 carry?

About 2,053 vehicles per day (1995 count), of which roughly 3% are trucks.

How long is 29 Mile Road over I-94?

The structure is 227 ft (69.2 m) long with a longest span of 71 ft (21.6 m) and a deck 36 ft wide.

Who owns 29 Mile Road over I-94?

It is owned by the State Highway Agency.