SD1804 over Oahe Reservoir Lk
Campbell County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SD1804 over Oahe Reservoir Lk in Campbell County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1980, making it 45 years old at the 2025 inventory.
- It carries about 147 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 9 of the 16 inventoried bridges in Campbell County rated fair (56.2%); 0 (0.0%) are rated poor.
- 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 → (45.91348, -100.33067)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 24 ft |
| Location | 2.7 NW of Pollock |
| NBI structure number | 000000011074020 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Campbell County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US083 over Spring Ck | 2006 | 1,095 | Good |
| US083 over Mcclarem Lk Outlet | 2006 | 1,095 | Good |
| US083 over Ck | 2006 | 1,095 | Good |
| US083 over Ck | 2011 | 949 | Good |
| SD010 over Lake Pocasse Lk | 1961 | 387 | Fair |
| SD010 over Br Spring Ck | 1961 | 387 | Fair |
All bridges nearby: Campbell County, SD bridge conditions · every bridge in Campbell County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.