US Bridges

Minnesota Drive over Airport Spur Overhead

Fair

Anchorage Municipality, Alaska · Mile Point 4.9 · Structure no. 1973

Built
1999
26 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
146 ft
1 main span
Daily traffic
31,600
2020 count
Owner
State
State Highway Agency

About this bridge

Minnesota Drive over Airport Spur Overhead is a prestressed concrete tee beam carrying Minnesota Drive over Airport Spur Overhead in Anchorage Municipality, Alaska. It was built in 1999, so it is 26 years old, younger than the Alaska average of 35.9 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 31,600 vehicles a day, roughly 4% of them trucks, projected to reach 41,000 by 2039. The structure is 146 ft (44.5 m) long and 129 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMinnesota Drive
CrossesAirport Spur Overhead
LocationMile Point 4.9
RouteState Highway 42
CountyAnchorage Municipality
StateAlaska
Coordinates61.17556, -149.91472
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating104.8 US tons
Inventory rating39.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length146 ft (44.5 m)
Longest span143 ft (43.6 m)
Deck width129 ft (39.4 m)
Roadway width102 ft (31.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,600 (2020)
Projected traffic41,000 by 2039
Trucks4%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

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 Minnesota Drive over Airport Spur Overhead built?

It was built in 1999, making it 26 years old in 2025.

What condition is Minnesota Drive over Airport Spur Overhead 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 Minnesota Drive over Airport Spur Overhead carry?

About 31,600 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Minnesota Drive over Airport Spur Overhead?

The structure is 146 ft (44.5 m) long with a longest span of 143 ft (43.6 m) and a deck 129 ft wide.

Who owns Minnesota Drive over Airport Spur Overhead?

It is owned by the State Highway Agency.