US Bridges

Glenn Highway over Glenn HWY Overhead SB

Fair

Anchorage Municipality, Alaska · Mile Point 25.3 · Structure no. 1865

Built
1977
48 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
169 ft
3 main spans
Daily traffic
14,600
2020 count
Owner
State
State Highway Agency

About this bridge

Glenn Highway over Glenn HWY Overhead SB is a steel stringer/multi-beam or girder carrying Glenn Highway over Glenn HWY Overhead SB in Anchorage Municipality, Alaska. It was built in 1977, so it is 48 years old, older 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 14,600 vehicles a day, roughly 3% of them trucks, projected to reach 20,800 by 2039. The structure is 169 ft (51.5 m) long and 37 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesGlenn Highway
CrossesGlenn HWY Overhead SB
LocationMile Point 25.3
RouteInterstate 0A16
CountyAnchorage Municipality
StateAlaska
Coordinates61.46167, -149.34944
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 alignment7: Better than present minimum criteria
Operating rating109.3 US tons
Inventory rating40.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length169 ft (51.5 m)
Longest span63 ft (19.2 m)
Deck width37 ft (11.3 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,600 (2020)
Projected traffic20,800 by 2039
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Glenn Highway over Glenn HWY Overhead SB built?

It was built in 1977, making it 48 years old in 2025.

What condition is Glenn Highway over Glenn HWY Overhead SB 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 2023.

How much traffic does Glenn Highway over Glenn HWY Overhead SB carry?

About 14,600 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Glenn Highway over Glenn HWY Overhead SB?

The structure is 169 ft (51.5 m) long with a longest span of 63 ft (19.2 m) and a deck 37 ft wide.

Who owns Glenn Highway over Glenn HWY Overhead SB?

It is owned by the State Highway Agency.