US Bridges

M-26 over Silver River

Good

Keweenaw County, Michigan · 4.0 MI N of Eagle River · Structure no. 000000000005264

Built
2023
2 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
54 ft
1 main span
Daily traffic
1,100
2022 count
Owner
State
State Highway Agency

About this bridge

M-26 over Silver River is a prestressed concrete stringer/multi-beam or girder carrying M-26 over Silver River in Keweenaw County, Michigan. It was built in 2023, so it is 2 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,100 vehicles a day, roughly 2% of them trucks, projected to reach 1,225 by 2042. The structure is 54 ft (16.4 m) long and 42 ft wide.

Location

Open in Google Maps
CarriesM-26
CrossesSilver River
Location4.0 MI N of Eagle River
RouteState Highway 26
CountyKeweenaw County
StateMichigan
Coordinates47.4629, -88.07241
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating65 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length54 ft (16.4 m)
Longest span48 ft (14.7 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2022)
Projected traffic1,225 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

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

Frequently asked questions

When was M-26 over Silver River built?

It was built in 2023, making it 2 years old in 2025.

What condition is M-26 over Silver River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does M-26 over Silver River carry?

About 1,100 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is M-26 over Silver River?

The structure is 54 ft (16.4 m) long with a longest span of 48 ft (14.7 m) and a deck 42 ft wide.

Who owns M-26 over Silver River?

It is owned by the State Highway Agency.