US Bridges

M-46|W Monroe RD over Sugar Creek

Good

Gratiot County, Michigan · 2.3 MI W of ST Louis · Structure no. 000000000003111

Built
2002
23 years old
Condition
Good
inspected February 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
9,986
2007 count
Owner
State
State Highway Agency

About this bridge

M-46|W Monroe RD over Sugar Creek is a concrete culvert carrying M-46|W Monroe RD over Sugar Creek in Gratiot County, Michigan. It was built in 2002, so it is 23 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,986 vehicles a day, roughly 6% of them trucks, projected to reach 13,037 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-46|W Monroe RD
CrossesSugar Creek
Location2.3 MI W of ST Louis
RouteState Highway 46
CountyGratiot County
StateMichigan
Coordinates43.40791, -84.65304
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating107.1 US tons
Inventory rating65 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
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 traffic9,986 (2007)
Projected traffic13,037 by 2018
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-46|W Monroe RD over Sugar Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is M-46|W Monroe RD over Sugar Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does M-46|W Monroe RD over Sugar Creek carry?

About 9,986 vehicles per day (2007 count), of which roughly 6% are trucks.

How long is M-46|W Monroe RD over Sugar Creek?

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

Who owns M-46|W Monroe RD over Sugar Creek?

It is owned by the State Highway Agency.