US Bridges

Glenn Highway over Eklutna River - N.B.

Fair

Anchorage Municipality, Alaska · Mile Point 24.0 · Structure no. 1230

Built
1977
48 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
106 ft
1 main span
Daily traffic
15,500
2020 count
Owner
State
State Highway Agency

About this bridge

Glenn Highway over Eklutna River - N.B. is a prestressed concrete tee beam carrying Glenn Highway over Eklutna River - N.B. 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 15,500 vehicles a day, roughly 17% of them trucks, projected to reach 18,050 by 2039. The structure is 106 ft (32.3 m) long and 40 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesGlenn Highway
CrossesEklutna River - N.B.
LocationMile Point 24.0
RouteInterstate 0A16
CountyAnchorage Municipality
StateAlaska
Coordinates61.45056, -149.37472
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.3 US tons
Inventory rating31.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length106 ft (32.3 m)
Longest span102 ft (31.1 m)
Deck width40 ft (12.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,500 (2020)
Projected traffic18,050 by 2039
Trucks17%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Glenn Highway over Eklutna River - N.B. built?

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

What condition is Glenn Highway over Eklutna River - N.B. 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 Eklutna River - N.B. carry?

About 15,500 vehicles per day (2020 count), of which roughly 17% are trucks.

How long is Glenn Highway over Eklutna River - N.B.?

The structure is 106 ft (32.3 m) long with a longest span of 102 ft (31.1 m) and a deck 40 ft wide.

Who owns Glenn Highway over Eklutna River - N.B.?

It is owned by the State Highway Agency.