4300 East Road over Twin Falls Main Canal
Twin Falls County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 4300 East Road over Twin Falls Main Canal in Twin Falls County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1997, making it 28 years old at the 2025 inventory.
- It carries about 30 vehicles a day (traffic count year 2023).
- It is one of 107 of the 126 inventoried bridges in Twin Falls County rated fair (84.9%); 5 (4.0%) 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 → (42.53556, -114.21111)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 125 ft |
| Location | 2.9 N. 2.4 W. Murtaugh |
| NBI structure number | 000000000025341 |
| Condition class | Fair |
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.