Calhoun Avenue over Calhoun Viaduct
Juneau City and Borough, Alaska · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Calhoun Avenue over Calhoun Viaduct in Juneau City and Borough, Alaska, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1934, making it 91 years old at the 2025 inventory.
- It carries about 2,816 vehicles a day (traffic count year 2018).
- Its listed owner is a city or municipal highway agency.
- It is one of 29 of the 47 inventoried bridges in Juneau City and Borough rated fair (61.7%); 1 (2.1%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated June 2023, on a 24-month routine inspection cycle.
- 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 → (58.30194, -134.41278)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete stringer or multi-beam girder |
| Length | about 294 ft |
| Location | Mile Point 0.2 |
| NBI structure number | 1068 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Alaska department of transportation.
Busiest bridges in Juneau City and Borough
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Egan Drive over Jordan Creek (egan Dr) | 1971 | 21,700 | Fair |
| Egan Drive over Vanderbilt Creek | 1973 | 17,000 | Good |
| Egan Drive over Salmon Creek Powerhouse | 1973 | 16,900 | Fair |
| Glacier Highway over Mendenhall River | 2015 | 15,923 | Good |
| Egan Drive over Salmon Creek | 1973 | 13,800 | Fair |
| Jnu Douglas Br Rd over Gastineau Channel | 1981 | 12,800 | Fair |
All bridges nearby: Juneau City and Borough, AK bridge conditions · every bridge in Juneau City and Borough · Alaska bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.