US Bridges

M-124 over Lagoon River

Fair

Jackson County, Michigan · 0.1 MI N of Lenawee Col · Structure no. 000000000004386

Built
1931
94 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
1,681
2007 count
Owner
State
State Highway Agency

About this bridge

M-124 over Lagoon River is a concrete culvert carrying M-124 over Lagoon River in Jackson County, Michigan. It was built in 1931, so it is 94 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 1,681 vehicles a day, roughly 3% of them trucks, projected to reach 2,466 by 2018. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-124
CrossesLagoon River
Location0.1 MI N of Lenawee Col
RouteState Highway 124
CountyJackson County
StateMichigan
Coordinates42.07269, -84.13785
Functional classRural Major Collector

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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating60.7 US tons
Inventory rating36.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,681 (2007)
Projected traffic2,466 by 2018
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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-124 over Lagoon River built?

It was built in 1931, making it 94 years old in 2025.

What condition is M-124 over Lagoon 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 April 2023.

How much traffic does M-124 over Lagoon River carry?

About 1,681 vehicles per day (2007 count), of which roughly 3% are trucks.

How long is M-124 over Lagoon River?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m).

Who owns M-124 over Lagoon River?

It is owned by the State Highway Agency.