Stc 5805;WESTSIDE over Smith Creek
Boundary County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Stc 5805;WESTSIDE over Smith Creek in Boundary County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1970, making it 55 years old at the 2025 inventory.
- It carries about 80 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 47 of the 84 inventoried bridges in Boundary County rated fair (56.0%); 11 (13.1%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 2023, on a 24-month routine inspection cycle.
- 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 → (48.96111, -116.55472)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 103 ft |
| Location | 2.6 S. 2.7 W. Porthill |
| NBI structure number | 000000000020740 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Boundary County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 95 over Bnrr;arizona St. | 1972 | 13,000 | Fair |
| US 95 over Kootenai R;uprr;bnnrs Fy | 1984 | 13,000 | Fair |
| US 95 over Deep Cr;bnrr;uprr;naples | 1965 | 7,300 | Fair |
| US 95 over Deep Creek | 2024 | 6,600 | Good |
| US 95 over Trail Creek | 1965 | 6,300 | Fair |
| US 2 over Uprr;moyie Springs Op | 1965 | 2,600 | Fair |
All bridges nearby: Boundary County, ID bridge conditions · every bridge in Boundary County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.