US Bridges

M-30 over Tittabawassee River

Fair

Midland County, Michigan · 0.3 MI N of Edenville · Structure no. 000000000006897

Built
1947
78 years old, rebuilt 1999
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
361 ft
6 main spans
Daily traffic
4,422
2007 count
Owner
State
State Highway Agency

About this bridge

M-30 over Tittabawassee River is a prestressed concrete box beam or girders - single or spread carrying M-30 over Tittabawassee River in Midland County, Michigan. It was built in 1947 and reconstructed in 1999, so it is 78 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 4,422 vehicles a day, roughly 5% of them trucks, projected to reach 6,430 by 2018. The structure is 361 ft (110 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesM-30
CrossesTittabawassee River
Location0.3 MI N of Edenville
RouteState Highway 30
CountyMidland County
StateMichigan
Coordinates43.80577, -84.38609
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating70.8 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length361 ft (110 m)
Longest span60 ft (18.2 m)
Deck width34 ft (10.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,422 (2007)
Projected traffic6,430 by 2018
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 1947, making it 78 years old in 2025. It was reconstructed in 1999.

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 July 2023.

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

About 4,422 vehicles per day (2007 count), of which roughly 5% are trucks.

How long is M-30 over Tittabawassee River?

The structure is 361 ft (110 m) long with a longest span of 60 ft (18.2 m) and a deck 34 ft wide.

Who owns M-30 over Tittabawassee River?

It is owned by the State Highway Agency.