Bridge conditions in Sioux County, Nebraska
36 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
1 of the 36 bridges the federal inventory lists in Sioux County are rated poor; the rest split 21 good and 14 fair.
- 1 of the 36 bridges in Sioux County, Nebraska, are rated in poor condition (2.8%) in the 2025 National Bridge Inventory, as of .
- 21 bridges (58.3%) are rated good and 14 (38.9%) fair.
- The median Sioux County bridge was built in 1975.
- The busiest poor-rated bridge is County Highway over Hat Creek (built 1935), carrying about 15 vehicles a day.
Good 58.3% · Fair 38.9% · Poor 2.8% of 36 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| County Highway over Hat Creek | 1935 | 15 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| N71 over Wind Spring Draw | 1982 | 745 | Good |
| US20 over Stream | 1940 | 615 | Good |
| N29 over Stream | 1952 | 265 | Good |
| N29 over Stream | 1952 | 265 | Good |
| N29 over Stream | 1952 | 265 | Good |
| N29 over Interstate Canal | 1973 | 240 | Good |
| N29 over Stream | 1963 | 240 | Good |
| N29 over Niobrara River | 2006 | 205 | Good |
| Fas 1105 over Stream | 1935 | 150 | Good |
| Coll 7137 over Interstate Canal | 1972 | 145 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Nebraska: Nebraska bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.