US Bridges

M-64 over Townline Creek

Fair

Ontonagon County, Michigan · 6.3 MI NE of M-107 · Structure no. 000000000008472

Built
1968
57 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
59 ft
1 main span
Daily traffic
1,032
2007 count
Owner
State
State Highway Agency

About this bridge

M-64 over Townline Creek is a steel stringer/multi-beam or girder carrying M-64 over Townline Creek in Ontonagon County, Michigan. It was built in 1968, 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 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 1,032 vehicles a day, roughly 11% of them trucks, projected to reach 1,149 by 2018. The structure is 59 ft (18 m) long and 46 ft wide. If it were closed, the detour would be 55.3 mi (89 km).

Location

Open in Google Maps
CarriesM-64
CrossesTownline Creek
Location6.3 MI NE of M-107
RouteState Highway 64
CountyOntonagon County
StateMichigan
Coordinates46.8377, -89.44201
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
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length59 ft (18 m)
Longest span57 ft (17.5 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,032 (2007)
Projected traffic1,149 by 2018
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed55.3 mi (89 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 Townline Creek built?

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

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

About 1,032 vehicles per day (2007 count), of which roughly 11% are trucks.

How long is M-64 over Townline Creek?

The structure is 59 ft (18 m) long with a longest span of 57 ft (17.5 m) and a deck 46 ft wide.

Who owns M-64 over Townline Creek?

It is owned by the State Highway Agency.