US Bridges

M-30 over US-10

Poor

Midland County, Michigan · @ M-30 · Structure no. 000000000006912

Built
1961
64 years old
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
200 ft
4 main spans
Daily traffic
6,769
2007 count
Owner
State
State Highway Agency

About this bridge

M-30 over US-10 is a prestressed concrete stringer/multi-beam or girder carrying M-30 over US-10 in Midland County, Michigan. It was built in 1961, so it is 64 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 6,769 vehicles a day, roughly 4% of them trucks, projected to reach 8,728 by 2018. The structure is 200 ft (61 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesM-30
CrossesUS-10
Location@ M-30
RouteState Highway 30
CountyMidland County
StateMichigan
Coordinates43.68418, -84.36779
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating74 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length200 ft (61 m)
Longest span67 ft (20.3 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,769 (2007)
Projected traffic8,728 by 2018
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-30 over US-10 built?

It was built in 1961, making it 64 years old in 2025.

What condition is M-30 over US-10 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does M-30 over US-10 carry?

About 6,769 vehicles per day (2007 count), of which roughly 4% are trucks.

How long is M-30 over US-10?

The structure is 200 ft (61 m) long with a longest span of 67 ft (20.3 m) and a deck 36 ft wide.

Who owns M-30 over US-10?

It is owned by the State Highway Agency.