US Bridges

M-20 over N Br White River

Fair

Oceana County, Michigan · 9.4 MI E of US-31 · Structure no. 000000000008362

Built
1963
62 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
137 ft
3 main spans
Daily traffic
2,034
2007 count
Owner
State
State Highway Agency

About this bridge

M-20 over N Br White River is a prestressed concrete stringer/multi-beam or girder carrying M-20 over N Br White River in Oceana County, Michigan. It was built in 1963, so it is 62 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 5 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 2,034 vehicles a day, roughly 11% of them trucks, projected to reach 2,453 by 2018. The structure is 137 ft (41.7 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-20
CrossesN Br White River
Location9.4 MI E of US-31
RouteState Highway 20
CountyOceana County
StateMichigan
Coordinates43.57092, -86.21282
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59 US tons
Inventory rating35.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length137 ft (41.7 m)
Longest span46 ft (14 m)
Deck width47 ft (14.4 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,034 (2007)
Projected traffic2,453 by 2018
Trucks11%
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 N Br White River built?

It was built in 1963, making it 62 years old in 2025.

What condition is M-20 over N Br 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 April 2024.

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

About 2,034 vehicles per day (2007 count), of which roughly 11% are trucks.

How long is M-20 over N Br White River?

The structure is 137 ft (41.7 m) long with a longest span of 46 ft (14 m) and a deck 47 ft wide.

Who owns M-20 over N Br White River?

It is owned by the State Highway Agency.