US 30 over Dry Creek
Twin Falls County, Idaho · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 30 over Dry Creek in Twin Falls County, Idaho, 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 1934, making it 91 years old at the 2025 inventory.
- It carries about 2,900 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 5 of the 126 inventoried bridges in Twin Falls County rated poor (4.0%); 5 (4.0%) 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 → (42.47515, -114.14808)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Concrete deck arch |
| Length | about 60 ft |
| Location | 1.2 E. Murtaugh |
| NBI structure number | 000000000013660 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Twin Falls County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 93 over Perrine Coulee;bike Path | 2006 | 33,000 | Fair |
| US 93 over Snake River; Perrine Br. | 1976 | 31,500 | Fair |
| SH 74 over Rock Creek | 1993 | 19,000 | Good |
| US 30 over Perrine Coulee Canal | 1960 | 15,500 | Fair |
| US 93 over Rock Creek | 2011 | 15,000 | Fair |
| STC7232;BLUE Lakes over Rock Creek | 1959 | 11,500 | Poor |
All bridges nearby: Twin Falls County, ID bridge conditions · every bridge in Twin Falls County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.