7TH St over French Ck
Custer County, South Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 7TH St over French Ck in Custer County, South Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1994, making it 31 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2022).
- Its listed owner is a town or township highway agency.
- It is one of 47 of the 94 inventoried bridges in Custer County rated good (50.0%); 5 (5.3%) 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 August 2023, on a 24-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 → (43.76567, -103.59645)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Timber slab |
| Length | about 32 ft |
| Location | 7TH St S of Washington St |
| NBI structure number | 000000017231071 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Custer County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US016 over French Ck | 1966 | 10,052 | Fair |
| US016 over Ck | 1966 | 10,052 | Good |
| US016A over Laughing Water Ck | 1964 | 6,829 | Good |
| SD079 over Battle Ck | 1997 | 6,610 | Good |
| US016 over French Ck | 1974 | 3,709 | Fair |
| US016 over French Ck | 1974 | 3,709 | Fair |
All bridges nearby: Custer County, SD bridge conditions · every bridge in Custer County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.