US Bridges

US-2 over Millecoquin River

Fair

Mackinac County, Michigan · 4.8 MI E of M-117 · Structure no. 000000000005929

Built
1940
85 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
100 ft
2 main spans
Daily traffic
3,813
2007 count
Owner
State
State Highway Agency

About this bridge

US-2 over Millecoquin River is a steel stringer/multi-beam or girder carrying US-2 over Millecoquin River in Mackinac County, Michigan. It was built in 1940, so it is 85 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 3,813 vehicles a day, roughly 13% of them trucks, projected to reach 6,517 by 2018. The structure is 100 ft (30.5 m) long and 40 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesUS-2
CrossesMillecoquin River
Location4.8 MI E of M-117
RouteU.S. Route 2
CountyMackinac County
StateMichigan
Coordinates46.09545, -85.47371
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 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 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 rating63.2 US tons
Inventory rating37.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length100 ft (30.5 m)
Longest span49 ft (15 m)
Deck width40 ft (12.3 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,813 (2007)
Projected traffic6,517 by 2018
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US-2 over Millecoquin River built?

It was built in 1940, making it 85 years old in 2025.

What condition is US-2 over Millecoquin 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 June 2024.

How much traffic does US-2 over Millecoquin River carry?

About 3,813 vehicles per day (2007 count), of which roughly 13% are trucks.

How long is US-2 over Millecoquin River?

The structure is 100 ft (30.5 m) long with a longest span of 49 ft (15 m) and a deck 40 ft wide.

Who owns US-2 over Millecoquin River?

It is owned by the State Highway Agency.