US Bridges

Airline Road over US-31

Fair

Muskegon County, Michigan · @ US-31 & I-96 Interchg · Structure no. 000000000007625

Built
1961
64 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
161 ft
4 main spans
Daily traffic
5,000
1977 count
Owner
State
State Highway Agency

About this bridge

Airline Road over US-31 is a steel stringer/multi-beam or girder carrying Airline Road over US-31 in Muskegon County, Michigan. It was built in 1961, so it is 64 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 5,000 vehicles a day, roughly 3% of them trucks, projected to reach 5,000 by 1977. The structure is 161 ft (49.2 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesAirline Road
CrossesUS-31
Location@ US-31 & I-96 Interchg
RouteCity Street 2007
CountyMuskegon County
StateMichigan
Coordinates43.17311, -86.20584
Functional classUrban 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.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length161 ft (49.2 m)
Longest span46 ft (13.9 m)
Deck width43 ft (13.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (1977)
Projected traffic5,000 by 1977
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Airline Road over US-31 built?

It was built in 1961, making it 64 years old in 2025.

What condition is Airline 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 August 2023.

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

About 5,000 vehicles per day (1977 count), of which roughly 3% are trucks.

How long is Airline Road over US-31?

The structure is 161 ft (49.2 m) long with a longest span of 46 ft (13.9 m) and a deck 43 ft wide.

Who owns Airline Road over US-31?

It is owned by the State Highway Agency.