US Bridges

M-30 over Tittabawassee River

Fair

Gladwin County, Michigan · 1.5 MI Sw&w of Ogemaw Col · Structure no. 000000000002892

Built
1928
97 years old, rebuilt 1986
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
1 main span
Daily traffic
2,536
2007 count
Owner
State
State Highway Agency

About this bridge

M-30 over Tittabawassee River is a steel stringer/multi-beam or girder carrying M-30 over Tittabawassee River in Gladwin County, Michigan. It was built in 1928 and reconstructed in 1986, so it is 97 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 2,536 vehicles a day, roughly 7% of them trucks, projected to reach 3,043 by 2018. The structure is 62 ft (18.9 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-30
CrossesTittabawassee River
Location1.5 MI Sw&w of Ogemaw Col
RouteState Highway 30
CountyGladwin County
StateMichigan
Coordinates44.15596, -84.2912
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating50.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span60 ft (18.2 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,536 (2007)
Projected traffic3,043 by 2018
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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-30 over Tittabawassee River built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1986.

What condition is M-30 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 June 2024.

How much traffic does M-30 over Tittabawassee River carry?

About 2,536 vehicles per day (2007 count), of which roughly 7% are trucks.

How long is M-30 over Tittabawassee River?

The structure is 62 ft (18.9 m) long with a longest span of 60 ft (18.2 m) and a deck 36 ft wide.

Who owns M-30 over Tittabawassee River?

It is owned by the State Highway Agency.