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Bridge conditions in Butte County, California

440 inventoried bridges · 24 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

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 August 20, 2026.
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.

Every bridge in Butte County → - all 440, busiest first, each with its own condition record.

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.