Bia Rte 4 over Campbell Creek
Buffalo County, South Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Bia Rte 4 over Campbell Creek in Buffalo 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 2013, making it 12 years old at the 2025 inventory.
- It carries about 1,720 vehicles a day (traffic count year 2024).
- It is one of 8 of the 25 inventoried bridges in Buffalo County rated good (32.0%); 1 (4.0%) are rated poor.
- 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 → (44.02732, -99.36479)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 97 ft |
| Location | 8 Km SE of Ft Thompson |
| NBI structure number | 00000000000A900 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Buffalo County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SD045 over Crow Ck | 1960 | 949 | Fair |
| Irr SD050 over Wolf Ck | 1954 | 928 | Fair |
| Irr SD050 over Crow Ck | 1999 | 928 | Good |
| Irr SD034 over East Fork Soldier Ck | 1962 | 918 | Fair |
| Irr SD047 over Soldier Ck | 1963 | 917 | Fair |
| SD045 over Crow Ck | 1958 | 755 | Fair |
All bridges nearby: Buffalo County, SD bridge conditions · every bridge in Buffalo County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.