US Bridges

M-61 over Tittabawassee River

Fair

Gladwin County, Michigan · 0.3 MI E of M-30 · Structure no. 000000000002880

Built
1958
67 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
276 ft
4 main spans
Daily traffic
3,302
2007 count
Owner
State
State Highway Agency

About this bridge

M-61 over Tittabawassee River is a steel stringer/multi-beam or girder carrying M-61 over Tittabawassee River in Gladwin 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 3,302 vehicles a day, roughly 6% of them trucks, projected to reach 5,070 by 2018. The structure is 276 ft (84.1 m) long and 37 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesM-61
CrossesTittabawassee River
Location0.3 MI E of M-30
RouteState Highway 61
CountyGladwin County
StateMichigan
Coordinates43.97937, -84.35733
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 22 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length276 ft (84.1 m)
Longest span71 ft (21.6 m)
Deck width37 ft (11.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,302 (2007)
Projected traffic5,070 by 2018
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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$195,000
NavigationNo navigation control on waterway

Frequently asked questions

When was M-61 over Tittabawassee River built?

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

What condition is M-61 over Tittabawassee 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 December 2024.

How much traffic does M-61 over Tittabawassee River carry?

About 3,302 vehicles per day (2007 count), of which roughly 6% are trucks.

How long is M-61 over Tittabawassee River?

The structure is 276 ft (84.1 m) long with a longest span of 71 ft (21.6 m) and a deck 37 ft wide.

Who owns M-61 over Tittabawassee River?

It is owned by the State Highway Agency.