Glenn Highway over Knik River Northbound
FairAnchorage Municipality, Alaska · Mile Point 28.7 · Structure no. 1121
- Built
- 1965
- 60 years old, rebuilt 1993
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 1,532 ft
- 8 main spans
- Daily traffic
- 13,300
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Glenn Highway over Knik River Northbound is a steel continuous stringer/multi-beam or girder carrying Glenn Highway over Knik River Northbound in Anchorage Municipality, Alaska. It was built in 1965 and reconstructed in 1993, so it is 60 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 13,300 vehicles a day, roughly 8% of them trucks, projected to reach 15,400 by 2039. The structure is 1,532 ft (467 m) long and 40 ft wide. If it were closed, the detour would be 28 mi (45 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Glenn Highway over Knik River Northbound built?
It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1993.
What condition is Glenn Highway over Knik River Northbound 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 Knik River Northbound carry?
About 13,300 vehicles per day (2020 count), of which roughly 8% are trucks.
How long is Glenn Highway over Knik River Northbound?
The structure is 1,532 ft (467 m) long with a longest span of 203 ft (61.9 m) and a deck 40 ft wide.
Who owns Glenn Highway over Knik River Northbound?
It is owned by the State Highway Agency.