US Bridges

M-57 over Brent Run Creek

Fair

Genesee County, Michigan · 1.9 MI E of Montrose · Structure no. 000000000002619

Built
1966
59 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
118 ft
3 main spans
Daily traffic
11,915
2007 count
Owner
State
State Highway Agency

About this bridge

M-57 over Brent Run Creek is a prestressed concrete stringer/multi-beam or girder carrying M-57 over Brent Run Creek in Genesee County, Michigan. It was built in 1966, so it is 59 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 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 11,915 vehicles a day, roughly 7% of them trucks, projected to reach 12,962 by 2018. The structure is 118 ft (35.9 m) long and 46 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-57
CrossesBrent Run Creek
Location1.9 MI E of Montrose
RouteState Highway 57
CountyGenesee County
StateMichigan
Coordinates43.17686, -83.85615
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length118 ft (35.9 m)
Longest span40 ft (12.2 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,915 (2007)
Projected traffic12,962 by 2018
Trucks7%
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-57 over Brent Run Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is M-57 over Brent Run 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 March 2023.

How much traffic does M-57 over Brent Run Creek carry?

About 11,915 vehicles per day (2007 count), of which roughly 7% are trucks.

How long is M-57 over Brent Run Creek?

The structure is 118 ft (35.9 m) long with a longest span of 40 ft (12.2 m) and a deck 46 ft wide.

Who owns M-57 over Brent Run Creek?

It is owned by the State Highway Agency.