US Bridges

Shelby Road over US-31

Fair

Oceana County, Michigan · 0.75 MI W of Shelby · Structure no. 000000000008347

Built
1975
50 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
268 ft
2 main spans
Daily traffic
770
1988 count
Owner
State
State Highway Agency

About this bridge

Shelby Road over US-31 is a steel stringer/multi-beam or girder carrying Shelby Road over US-31 in Oceana County, Michigan. It was built in 1975, so it is 50 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 770 vehicles a day, projected to reach 700 by 1977. The structure is 268 ft (81.7 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesShelby Road
CrossesUS-31
Location0.75 MI W of Shelby
RouteCounty Highway 6440
CountyOceana County
StateMichigan
Coordinates43.60949, -86.38981
Functional classRural Major Collector

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.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.3 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length268 ft (81.7 m)
Longest span134 ft (40.9 m)
Deck width44 ft (13.5 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic770 (1988)
Projected traffic700 by 1977
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$181,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Shelby Road over US-31 built?

It was built in 1975, making it 50 years old in 2025.

What condition is Shelby Road over US-31 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 July 2024.

How much traffic does Shelby Road over US-31 carry?

About 770 vehicles per day (1988 count).

How long is Shelby Road over US-31?

The structure is 268 ft (81.7 m) long with a longest span of 134 ft (40.9 m) and a deck 44 ft wide.

Who owns Shelby Road over US-31?

It is owned by the State Highway Agency.