US Bridges

M-129 over Br Charlotte River

Fair

Chippewa County, Michigan · 0.3 MI S of 9 Mile RD · Structure no. 000000000001611

Built
1999
26 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
31 ft
1 main span
Daily traffic
3,344
2007 count
Owner
State
State Highway Agency

About this bridge

M-129 over Br Charlotte River is a concrete culvert carrying M-129 over Br Charlotte River in Chippewa County, Michigan. It was built in 1999, so it is 26 years old, younger 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 3,344 vehicles a day, roughly 4% of them trucks, projected to reach 4,583 by 2018. The structure is 31 ft (9.5 m) long. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesM-129
CrossesBr Charlotte River
Location0.3 MI S of 9 Mile RD
RouteState Highway 129
CountyChippewa County
StateMichigan
Coordinates46.3715, -84.3588
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57.7 US tons
Inventory rating34.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length31 ft (9.5 m)
Longest span31 ft (9.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,344 (2007)
Projected traffic4,583 by 2018
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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-129 over Br Charlotte River built?

It was built in 1999, making it 26 years old in 2025.

What condition is M-129 over Br Charlotte 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 May 2023.

How much traffic does M-129 over Br Charlotte River carry?

About 3,344 vehicles per day (2007 count), of which roughly 4% are trucks.

How long is M-129 over Br Charlotte River?

The structure is 31 ft (9.5 m) long with a longest span of 31 ft (9.5 m).

Who owns M-129 over Br Charlotte River?

It is owned by the State Highway Agency.