I 15B;SUNNYSIDE Rd over I 15;SUNNYSIDE Rd Ic
Bonneville County, Idaho · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I 15B;SUNNYSIDE Rd over I 15;SUNNYSIDE Rd Ic in Bonneville County, Idaho, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 2007, making it 18 years old at the 2025 inventory.
- It carries about 11,000 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 69 of the 213 inventoried bridges in Bonneville County rated good (32.4%); 3 (1.4%) 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, substructure 7 to 8.
- Its most recent inspection on record is dated September 2024, on a 48-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 → (43.46783, -112.08639)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 8 | Very good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 8 | Very good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 327 ft |
| Location | 1.1 W. Idaho Falls |
| NBI structure number | 000000000021614 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2024 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Bonneville County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 20 over Porter Canal | 1966 | 38,000 | Fair |
| US 20 Ebl & Wbl over Snake R.;johns Hole Br. | 1966 | 38,000 | Fair |
| US 20 over Sma 7096;RIVERSIDE Dr.ic | 1969 | 38,000 | Fair |
| US 20 over Sage Canal | 1970 | 34,500 | Fair |
| US 20 over UPRR | 1966 | 32,000 | Fair |
| US 20 Wbl & Ebl over Sma 7076;LINDSAY Blvd.ic | 1966 | 32,000 | Fair |
All bridges nearby: Bonneville County, ID bridge conditions · every bridge in Bonneville County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.