US Bridges

M-61 over M Br Pine River

Poor

Arenac County, Michigan · 2.0 MI W of Standish · Structure no. 000000000000376

Built
1952
73 years old
Condition
Poor
inspected May 2024
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
4,242
2007 count
Owner
State
State Highway Agency

About this bridge

M-61 over M Br Pine River is a concrete slab carrying M-61 over M Br Pine River in Arenac County, Michigan. It was built in 1952, so it is 73 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 4 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.

It carries about 4,242 vehicles a day, roughly 7% of them trucks, projected to reach 4,845 by 2018. The structure is 23 ft (7.1 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesM-61
CrossesM Br Pine River
Location2.0 MI W of Standish
RouteState Highway 61
CountyArenac County
StateMichigan
Coordinates43.98306, -83.99779
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length23 ft (7.1 m)
Longest span20 ft (6.2 m)
Deck width43 ft (13.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,242 (2007)
Projected traffic4,845 by 2018
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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-61 over M Br Pine River built?

It was built in 1952, making it 73 years old in 2025.

What condition is M-61 over M Br Pine River 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 May 2024.

How much traffic does M-61 over M Br Pine River carry?

About 4,242 vehicles per day (2007 count), of which roughly 7% are trucks.

How long is M-61 over M Br Pine River?

The structure is 23 ft (7.1 m) long with a longest span of 20 ft (6.2 m) and a deck 43 ft wide.

Who owns M-61 over M Br Pine River?

It is owned by the State Highway Agency.