Bridge conditions in Butte County, California
440 inventoried bridges · 24 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Butte County tracks close to typical: 24 of its 440 inventoried bridges (5.5%) are rated poor, against a national rate of about 7%.
- 24 of the 440 bridges in Butte County, California, are rated in poor condition (5.5%) in the 2025 National Bridge Inventory, as of .
- 138 bridges (31.4%) are rated good and 278 (63.2%) fair.
- The median Butte County bridge was built in 1962.
- The busiest poor-rated bridge is Skyway over Magalia Reservoir Spilwy (built 1975), carrying about 13,516 vehicles a day.
Good 31.4% · Fair 63.2% · Poor 5.5% of 440 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 |
|---|---|---|---|
| Skyway over Magalia Reservoir Spilwy | 1975 | 13,516 | Poor |
| Skyway Rd EB over Butte Creek | 1978 | 12,054 | Poor |
| Manzanita Ave over Big Chico Creek | 1974 | 12,000 | Poor |
| E 5TH Ave (chico) over Lindo Channel | 1970 | 7,848 | Poor |
| Pentz Road over Berry Canyon | 1970 | 7,146 | Poor |
| Humboldt Road over Dead Horse Slough Divrsn | 1957 | 3,500 | Poor |
| Orvle Chico Hwy over Durham Mutual Ditch | 1920 | 1,552 | Poor |
| State Route 162 over Canyon Creek | 1967 | 1,500 | Poor |
| W Bigs-gridly Rd over Hamilton Slough | 1950 | 800 | Poor |
| Cherokee Rd over UP RR & BNSF Ry | 1963 | 775 | Poor |
| Neal Rd over Nance Canyon | 1920 | 400 | Poor |
| Orvle Chico Hwy over Hamlin Slough | 1920 | 300 | Poor |
| Oroville Chico Hwy over Nance Canyon | 1920 | 300 | Poor |
| Cana Hwy over Pine Creek | 1921 | 276 | Poor |
| E Rio Bonito Road over Sutter-butte Canal | 1974 | 270 | Poor |
| Mesa Rd over Durham Mutual Ditch | 1949 | 130 | Poor |
| Afton Road over Butte Creek | 1914 | 122 | Poor |
| Nelson Shippee Rd over Western Canal | 1940 | 110 | Poor |
| Middle Honcut Rd over Wyandotte Creek | 1920 | 60 | Poor |
| Camp Creek Rd over Camp Creek | 1941 | 20 | Poor |
| Chandon Ave over Sutter-butte Canal | 1968 | 20 | Poor |
| Openshaw Rd over Dry Creek | 1930 | 20 | Poor |
| E Evans Reimer Rd over Sutter-butte Canal | 1940 | 10 | Poor |
| Wickman Rd over Watt Lateral (irrig Lat) | 1940 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Skyway over State Route 99 | 1965 | 37,400 | Good |
| State Route 99 over Dry Channel | 1953 | 32,600 | Good |
| State Route 99 over Scrub Creek | 1952 | 28,250 | Good |
| State Route 99 over Nance Canyon | 1952 | 28,250 | Good |
| Cohasset Hwy over State Route 99 | 1966 | 27,008 | Good |
| State Route 99 SB over Little Chico Creek | 1965 | 24,750 | Fair |
| State Route 99 NB over Little Chico Creek | 1965 | 24,750 | Fair |
| State Route 99 SB over State Route 32 EB | 1965 | 24,750 | Good |
| State Route 99 NB over State Route 32 EB | 1965 | 24,750 | Good |
| State Route 99 SB over State Route 32 WB | 1965 | 24,750 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of California: California 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.