US Bridges

M-30 over W Br Tittabawassee River

Fair

Gladwin County, Michigan · 8.2 MI N of M-61 · Structure no. 000000000002891

Built
1954
71 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
40 ft
1 main span
Daily traffic
2,536
2007 count
Owner
State
State Highway Agency

About this bridge

M-30 over W Br Tittabawassee River is a concrete tee beam carrying M-30 over W Br Tittabawassee River in Gladwin County, Michigan. It was built in 1954, so it is 71 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 6 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 40 ft (12.2 m) long and 60 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesM-30
CrossesW Br Tittabawassee River
Location8.2 MI N of M-61
RouteState Highway 30
CountyGladwin County
StateMichigan
Coordinates44.09094, -84.36683
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.6 US tons
Inventory rating53.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width60 ft (18.2 m)
Roadway width36 ft (10.9 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 closed8.7 mi (14 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 W Br Tittabawassee River built?

It was built in 1954, making it 71 years old in 2025.

What condition is M-30 over W Br 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 W Br Tittabawassee River carry?

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

How long is M-30 over W Br Tittabawassee River?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 60 ft wide.

Who owns M-30 over W Br Tittabawassee River?

It is owned by the State Highway Agency.