Seward Highway over Omalley Undercrossing
FairAnchorage Municipality, Alaska · Mile Point 119.8 · Structure no. 1380
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected June 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 170 ft
- 2 main spans
- Daily traffic
- 31,400
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Seward Highway over Omalley Undercrossing is a prestressed concrete tee beam carrying Seward Highway over Omalley Undercrossing in Anchorage Municipality, Alaska. It was built in 1978, so it is 47 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 31,400 vehicles a day, roughly 17% of them trucks, projected to reach 38,700 by 2039. The structure is 170 ft (51.8 m) long and 101 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Seward Highway over Omalley Undercrossing built?
It was built in 1978, making it 47 years old in 2025.
What condition is Seward Highway over Omalley Undercrossing 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 June 2023.
How much traffic does Seward Highway over Omalley Undercrossing carry?
About 31,400 vehicles per day (2020 count), of which roughly 17% are trucks.
How long is Seward Highway over Omalley Undercrossing?
The structure is 170 ft (51.8 m) long with a longest span of 82 ft (25.1 m) and a deck 101 ft wide.
Who owns Seward Highway over Omalley Undercrossing?
It is owned by the State Highway Agency.