US Bridges

M-156 over Silver Creek

Fair

Lenawee County, Michigan · In Morenci · Structure no. 000000000005504

Built
1935
90 years old, rebuilt 2000
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
1,253
2007 count
Owner
State
State Highway Agency

About this bridge

M-156 over Silver Creek is a steel stringer/multi-beam or girder carrying M-156 over Silver Creek in Lenawee County, Michigan. It was built in 1935 and reconstructed in 2000, so it is 90 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 1,253 vehicles a day, roughly 10% of them trucks, projected to reach 1,673 by 2018. The structure is 45 ft (13.7 m) long and 41 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesM-156
CrossesSilver Creek
LocationIn Morenci
RouteState Highway 156
CountyLenawee County
StateMichigan
Coordinates41.71245, -84.21156
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.8 US tons
Inventory rating51.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length45 ft (13.7 m)
Longest span45 ft (13.7 m)
Deck width41 ft (12.6 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,253 (2007)
Projected traffic1,673 by 2018
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-156 over Silver Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 2000.

What condition is M-156 over Silver Creek 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 2024.

How much traffic does M-156 over Silver Creek carry?

About 1,253 vehicles per day (2007 count), of which roughly 10% are trucks.

How long is M-156 over Silver Creek?

The structure is 45 ft (13.7 m) long with a longest span of 45 ft (13.7 m) and a deck 41 ft wide.

Who owns M-156 over Silver Creek?

It is owned by the State Highway Agency.