US Bridges

M-134 over Pine River

Fair

Mackinac County, Michigan · 1.0 MI E of I-75 · Structure no. 000000000005968

Built
1958
67 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
179 ft
3 main spans
Daily traffic
1,404
2007 count
Owner
State
State Highway Agency

About this bridge

M-134 over Pine River is a steel stringer/multi-beam or girder carrying M-134 over Pine River in Mackinac County, Michigan. It was built in 1958, so it is 67 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 1,404 vehicles a day, roughly 8% of them trucks, projected to reach 1,907 by 2018. The structure is 179 ft (54.6 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesM-134
CrossesPine River
Location1.0 MI E of I-75
RouteState Highway 134
CountyMackinac County
StateMichigan
Coordinates46.05712, -84.65667
Functional classRural Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating73.2 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length179 ft (54.6 m)
Longest span59 ft (18 m)
Deck width37 ft (11.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,404 (2007)
Projected traffic1,907 by 2018
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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$77,000
NavigationNo navigation control on waterway

Frequently asked questions

When was M-134 over Pine River built?

It was built in 1958, making it 67 years old in 2025.

What condition is M-134 over Pine 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 September 2024.

How much traffic does M-134 over Pine River carry?

About 1,404 vehicles per day (2007 count), of which roughly 8% are trucks.

How long is M-134 over Pine River?

The structure is 179 ft (54.6 m) long with a longest span of 59 ft (18 m) and a deck 37 ft wide.

Who owns M-134 over Pine River?

It is owned by the State Highway Agency.