US Bridges

M-20 over White River

Fair

Newaygo County, Michigan · 6.5 MI E of Hesperia · Structure no. 000000000007713

Built
1970
55 years old, rebuilt 2008
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
152 ft
3 main spans
Daily traffic
4,400
2009 count
Owner
State
State Highway Agency

About this bridge

M-20 over White River is a steel stringer/multi-beam or girder carrying M-20 over White River in Newaygo County, Michigan. It was built in 1970 and reconstructed in 2008, so it is 55 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 4,400 vehicles a day, roughly 9% of them trucks, projected to reach 5,750 by 2029. The structure is 152 ft (46.3 m) long and 48 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-20
CrossesWhite River
Location6.5 MI E of Hesperia
RouteState Highway 20
CountyNewaygo County
StateMichigan
Coordinates43.5688, -85.90927
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length152 ft (46.3 m)
Longest span56 ft (17.1 m)
Deck width48 ft (14.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,400 (2009)
Projected traffic5,750 by 2029
Trucks9%
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-20 over White River built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2008.

What condition is M-20 over White River 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 June 2024.

How much traffic does M-20 over White River carry?

About 4,400 vehicles per day (2009 count), of which roughly 9% are trucks.

How long is M-20 over White River?

The structure is 152 ft (46.3 m) long with a longest span of 56 ft (17.1 m) and a deck 48 ft wide.

Who owns M-20 over White River?

It is owned by the State Highway Agency.