US Bridges

Airline Road over US-31 Ramp

Fair

Muskegon County, Michigan · @ US-31 & I-96 Interchg · Structure no. 000000000007626

Built
1961
64 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
137 ft
3 main spans
Daily traffic
6,514
1996 count
Owner
State
State Highway Agency

About this bridge

Airline Road over US-31 Ramp is a steel stringer/multi-beam or girder carrying Airline Road over US-31 Ramp 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 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 6,514 vehicles a day, roughly 3% of them trucks, projected to reach 5,000 by 2016. The structure is 137 ft (41.7 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesAirline Road
CrossesUS-31 Ramp
Location@ US-31 & I-96 Interchg
RouteCounty Highway 2007
CountyMuskegon County
StateMichigan
Coordinates43.17298, -86.2049
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.1 US tons
Inventory rating49.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length137 ft (41.7 m)
Longest span47 ft (14.3 m)
Deck width43 ft (13.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,514 (1996)
Projected traffic5,000 by 2016
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 Ramp built?

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

What condition is Airline Road over US-31 Ramp 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 Ramp carry?

About 6,514 vehicles per day (1996 count), of which roughly 3% are trucks.

How long is Airline Road over US-31 Ramp?

The structure is 137 ft (41.7 m) long with a longest span of 47 ft (14.3 m) and a deck 43 ft wide.

Who owns Airline Road over US-31 Ramp?

It is owned by the State Highway Agency.