US Bridges

M-30 over Br Tittabawassee River

Fair

Gladwin County, Michigan · 7.1 MI N of M-61 · Structure no. 000000000002893

Built
1954
71 years old
Condition
Fair
inspected June 2024
Type
Culvert
Steel
Length
26 ft
2 main spans
Daily traffic
2,536
2007 count
Owner
State
State Highway Agency

About this bridge

M-30 over Br Tittabawassee River is a steel culvert carrying M-30 over 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 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 26 ft (7.9 m) long.

Location

Open in Google Maps
CarriesM-30
CrossesBr Tittabawassee River
Location7.1 MI N of M-61
RouteState Highway 30
CountyGladwin County
StateMichigan
Coordinates44.07825, -84.36691
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length26 ft (7.9 m)
Longest span12 ft (3.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 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 closed—
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 Br Tittabawassee River built?

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

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

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

How long is M-30 over Br Tittabawassee River?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.6 m).

Who owns M-30 over Br Tittabawassee River?

It is owned by the State Highway Agency.