Butte County Bridge Report Card

Butte County scores 67 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D67 / 100

Local infrastructure snapshot

Butte County, California

Butte County has 440 bridges in the National Bridge Inventory, with 24 rated poor and 28 rated scour-critical. Its poor-condition share of 5.5% is above the 4.9% statewide average. Poor-condition bridges carry about 62,739 daily vehicle crossings.

440Total Bridges

24Poor (5.5%)

278Fair (63.2%)

28Scour-Critical

Quote-Ready Local Facts

5.5%of county bridges are in poor condition, compared with 4.9% statewide and 6.7% nationally.

62,739daily vehicle crossings are on poor-condition bridges in the county.

28bridges are rated scour-critical, or 6.4% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Butte County a Bridge Condition Exposure Score of 67/100 (D). The county has 440 bridges in the National Bridge Inventory, including 24 in poor condition and 28 rated scour-critical. Poor-condition bridges carry about 62,739 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.

Download all county report-card scores as CSV.

How the Score Breaks Down

Factor	Weight	County Value	Penalty
Poor-condition bridge share	40	5.5%	10.9
Poor-condition traffic exposure	25	2.8% of measured traffic	2.1
Scour-critical bridge share	20	6.4%	12.7
Average age vs national baseline	10	67 years vs 48 nationally	7.7
Traffic-data completeness	5	2,247,770 measured daily crossings	0.0

Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.

County Comparisons

County Poor-Condition Share	5.5%
State Poor-Condition Share	4.9%
National Poor-Condition Share	6.7%
County Scour-Critical Share	6.4%
Average Bridge Age	67 years
Poor-Condition Traffic Exposure	62,739 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeSkyway over Magalia Reservoir Spilwy — 13,516 vehicles/day Oldest Listed BridgeHicks Lane over Mud Creek — built in 1900 All County BridgesBrowse every bridge record in Butte County.

Top Bridges to Watch in Butte County

Bridge	Reason	Condition	Daily Traffic	Year Built
Cana HWY over Pine Creek	Poor condition + traffic exposure	Poor	276	1921
Mesa RD over Durham Mutual Ditch	Poor condition + traffic exposure	Poor	130	1949
Afton Road over Butte Creek	Poor condition + traffic exposure	Poor	122	1914
Openshaw RD over Dry Creek	Poor condition + traffic exposure	Poor	20	1930
Skyway over Magalia Reservoir Spilwy	Poor condition + traffic exposure	Poor	13,516	1975
Skyway RD EB over Butte Creek	Poor condition + traffic exposure	Poor	12,054	1978
Manzanita AVE over Big Chico Creek	Poor condition + traffic exposure	Poor	12,000	1974
E 5th AVE (chico) over Lindo Channel	Poor condition + traffic exposure	Poor	7,848	1970
Pentz Road over Berry Canyon	Poor condition + traffic exposure	Poor	7,146	1970
Humboldt Road over Dead Horse Slough Divrsn	Poor condition + traffic exposure	Poor	3,500	1957

Important safety note

Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.