425TH Ave over Redstone Ck
Kingsbury County, South Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 425TH Ave over Redstone Ck in Kingsbury 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 1989, making it 36 years old at the 2025 inventory.
- It carries about 150 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 6 of the 35 inventoried bridges in Kingsbury County rated good (17.1%); 10 (28.6%) 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 2024, 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 → (44.35667, -97.71266)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 56 ft |
| Location | 0.9 S Manchester |
| NBI structure number | 000000039070129 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| 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 Kingsbury County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US014 over Ck | 1988 | 2,420 | Fair |
| US014 over Ck | 1975 | 2,255 | Fair |
| US014 over South Fork Pearl Ck | 1965 | 1,743 | Fair |
| US014 over Redstone Ck | 1987 | 1,693 | Fair |
| SD025 over Ck | 2023 | 1,279 | Good |
| 208TH St over South Fork Pearl Ck | 1933 | 913 | Poor |
All bridges nearby: Kingsbury County, SD bridge conditions · every bridge in Kingsbury County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.