Irr:kolgnk Dump Rd over Unnamed Creek
Dillingham Census Area, Alaska · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr:kolgnk Dump Rd over Unnamed Creek in Dillingham Census Area, Alaska, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1980 and reconstructed in 1986, making it 45 years old at the 2025 inventory.
- It carries about 10 vehicles a day (traffic count year 2018).
- Its listed owner is a city or municipal highway agency.
- It is one of 2 of the 3 inventoried bridges in Dillingham Census Area rated poor (66.7%); 2 (66.7%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (59.71902, -157.30942)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 41 ft |
| Location | Koliganek |
| NBI structure number | 1835 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Alaska department of transportation.
Busiest bridges in Dillingham Census Area
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Irr:suravak Road over Wood River | 2015 | 340 | Good |
| Irr:airport Road over Unnamed Creek Koliganek | 1980 | 50 | Poor |
All bridges nearby: Dillingham Census Area, AK bridge conditions · every bridge in Dillingham Census Area · Alaska bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.