US Bridges

M-64 over Duck Creek

Good

Ontonagon County, Michigan · 4.9 MI NE of M-107 · Structure no. 000000000008470

Built
1968
57 years old, rebuilt 2013
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
66 ft
1 main span
Daily traffic
875
2013 count
Owner
State
State Highway Agency

About this bridge

M-64 over Duck Creek is a steel stringer/multi-beam or girder carrying M-64 over Duck Creek in Ontonagon County, Michigan. It was built in 1968 and reconstructed in 2013, so it is 57 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 875 vehicles a day, roughly 5% of them trucks, projected to reach 1,025 by 2033. The structure is 66 ft (20.2 m) long and 46 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesM-64
CrossesDuck Creek
Location4.9 MI NE of M-107
RouteState Highway 64
CountyOntonagon County
StateMichigan
Coordinates46.83606, -89.46951
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating70.8 US tons
Inventory rating42.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length66 ft (20.2 m)
Longest span65 ft (19.7 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic875 (2013)
Projected traffic1,025 by 2033
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-64 over Duck Creek built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2013.

What condition is M-64 over Duck Creek 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-64 over Duck Creek carry?

About 875 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is M-64 over Duck Creek?

The structure is 66 ft (20.2 m) long with a longest span of 65 ft (19.7 m) and a deck 46 ft wide.

Who owns M-64 over Duck Creek?

It is owned by the State Highway Agency.