Irr:steward Road over Unalaska Creek
Aleutians West Census Area, Alaska · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr:steward Road over Unalaska Creek in Aleutians West Census Area, Alaska, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2006, making it 19 years old at the 2025 inventory.
- It carries about 2,333 vehicles a day (traffic count year 2018).
- Its listed owner is a city or municipal highway agency.
- It is one of 6 of the 8 inventoried bridges in Aleutians West Census Area rated good (75.0%); 0 (0.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: deck 7 to 8.
- Its most recent inspection on record is dated September 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (53.86094, -166.51218)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 80 ft |
| Location | Mile Point 0.6 |
| NBI structure number | 1531 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Alaska department of transportation.
Busiest bridges in Aleutians West Census Area
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Irr:airport Beach over South Channel Unalaska | 2008 | 3,450 | Good |
| IRR:5TH Street over Iliuliuk River | 1983 | 2,750 | Fair |
| Captains Bay Road over Pyramid Creek | 2001 | 976 | Fair |
| Irr:summer Bay Rd over Summer Bay Creek | 2014 | 400 | Good |
| Irr:kelty Field Rd over Kelty Field | 1999 | 30 | Good |
| Irr:dock Street over Atka Dock Creek | 1997 | 20 | Good |
All bridges nearby: Aleutians West Census Area, AK bridge conditions · every bridge in Aleutians West Census Area · Alaska bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.