Irr SD020 over Lake Kampeska Outlet
Codington County, South Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr SD020 over Lake Kampeska Outlet in Codington County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1958, making it 67 years old at the 2025 inventory.
- It carries about 3,365 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 46 of the 75 inventoried bridges in Codington County rated fair (61.3%); 14 (18.7%) 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 → (44.94424, -97.17526)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 186 ft |
| Location | 1.3 SE Jct Sd 139 |
| NBI structure number | 000000015156143 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.
Busiest bridges in Codington County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US212 over Big Sioux Rv | 2019 | 14,592 | Good |
| US212 Ser Rd over Ck | 1970 | 12,968 | Fair |
| US212 over Willow Ck | 1970 | 10,862 | Fair |
| US081 over Big Sioux Rv | 1966 | 7,665 | Fair |
| W Kemp Avenue over Big Sioux River | 1935 | 5,053 | Fair |
| 14TH Ave. N Wtn. over Big Sioux Rv | 1974 | 4,970 | Poor |
All bridges nearby: Codington County, SD bridge conditions · every bridge in Codington County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.