US Bridges

M-46 & US-127BR over US-127

Poor

Gratiot County, Michigan · M 46 & N JCT US 27 Br · Structure no. 000000000003105

Built
1961
64 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
365 ft
4 main spans
Daily traffic
11,219
2007 count
Owner
State
State Highway Agency

About this bridge

M-46 & US-127BR over US-127 is a steel stringer/multi-beam or girder carrying M-46 & US-127BR over US-127 in Gratiot County, Michigan. It was built in 1961, so it is 64 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 11,219 vehicles a day, roughly 6% of them trucks, projected to reach 13,037 by 2018. The structure is 365 ft (111.2 m) long and 49 ft wide.

CarriesM-46 & US-127BR
CrossesUS-127
LocationM 46 & N JCT US 27 Br
RouteState Highway 46
Coordinates43.40794, -84.66086
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating43.2 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length365 ft (111.2 m)
Longest span133 ft (40.5 m)
Deck width49 ft (14.9 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,219 (2007)
Projected traffic13,037 by 2018
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-46 & US-127BR over US-127 built?

It was built in 1961, making it 64 years old in 2025.

What condition is M-46 & US-127BR over US-127 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-46 & US-127BR over US-127 carry?

About 11,219 vehicles per day (2007 count), of which roughly 6% are trucks.

How long is M-46 & US-127BR over US-127?

The structure is 365 ft (111.2 m) long with a longest span of 133 ft (40.5 m) and a deck 49 ft wide.

Who owns M-46 & US-127BR over US-127?

It is owned by the State Highway Agency.