Portage Glacier Rd over Portage CR Overflow No 1
Anchorage Municipality, Alaska · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Portage Glacier Rd over Portage CR Overflow No 1 in Anchorage Municipality, Alaska, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1965, making it 60 years old at the 2025 inventory.
- It carries about 920 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 68 of the 134 inventoried bridges in Anchorage Municipality rated fair (50.7%); 0 (0.0%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (60.79306, -148.90417)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Concrete slab |
| Length | about 83 ft |
| Location | Mile Point 3.2 |
| NBI structure number | 0403 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Alaska department of transportation.
Busiest bridges in Anchorage Municipality
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Glenn Highway over Ship Creek | 1988 | 60,000 | Fair |
| Seward Highway over Dowling Rd Underxing | 2022 | 47,700 | Good |
| Seward Highway over Dimond Blvd Underxing | 1976 | 41,300 | Fair |
| Seward Highway over 76TH Ave Undercrossing | 2017 | 41,300 | Good |
| Airport/minnesota over Minnesota Dr Overhead | 1993 | 31,600 | Good |
| Minnesota Drive over Airport Spur Overhead | 1999 | 31,600 | Fair |
All bridges nearby: Anchorage Municipality, AK bridge conditions · every bridge in Anchorage Municipality · Alaska bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.