US Bridges

M-20 over E Br Little Muskegon

Good

Mecosta County, Michigan · In Mecosta · Structure no. 000000000006748

Built
2000
25 years old
Condition
Good
inspected July 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
3,535
2007 count
Owner
State
State Highway Agency

About this bridge

M-20 over E Br Little Muskegon is a prestressed concrete box beam or girders - single or spread carrying M-20 over E Br Little Muskegon in Mecosta County, Michigan. It was built in 2000, so it is 25 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 3,535 vehicles a day, roughly 8% of them trucks, projected to reach 5,040 by 2018. The structure is 53 ft (16.2 m) long and 52 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-20
CrossesE Br Little Muskegon
LocationIn Mecosta
RouteState Highway 20
CountyMecosta County
StateMichigan
Coordinates43.62211, -85.23057
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
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 rating80.4 US tons
Inventory rating48.2 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length53 ft (16.2 m)
Longest span53 ft (16.2 m)
Deck width52 ft (15.9 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,535 (2007)
Projected traffic5,040 by 2018
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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-20 over E Br Little Muskegon built?

It was built in 2000, making it 25 years old in 2025.

What condition is M-20 over E Br Little Muskegon 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 July 2023.

How much traffic does M-20 over E Br Little Muskegon carry?

About 3,535 vehicles per day (2007 count), of which roughly 8% are trucks.

How long is M-20 over E Br Little Muskegon?

The structure is 53 ft (16.2 m) long with a longest span of 53 ft (16.2 m) and a deck 52 ft wide.

Who owns M-20 over E Br Little Muskegon?

It is owned by the State Highway Agency.