Imperial County Bridge Report Card

Imperial County scores 77 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C77 / 100

Local infrastructure snapshot

Imperial County, California

Imperial County has 445 bridges in the National Bridge Inventory, with 35 rated poor and 0 rated scour-critical. Its poor-condition share of 7.9% is above the 4.9% statewide average. Poor-condition bridges carry about 100,835 daily vehicle crossings.

445Total Bridges

35Poor (7.9%)

167Fair (37.5%)

0Scour-Critical

Quote-Ready Local Facts

7.9%of county bridges are in poor condition, compared with 4.9% statewide and 6.7% nationally.

100,835daily vehicle crossings are on poor-condition bridges in the county.

0bridges are rated scour-critical, or 0.0% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Imperial County a Bridge Condition Exposure Score of 77/100 (C). The county has 445 bridges in the National Bridge Inventory, including 35 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 100,835 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	7.9%	15.7
Poor-condition traffic exposure	25	4.5% of measured traffic	3.4
Scour-critical bridge share	20	0.0%	0.0
Average age vs national baseline	10	58 years vs 48 nationally	4.0
Traffic-data completeness	5	2,226,093 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	7.9%
State Poor-Condition Share	4.9%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.0%
Average Bridge Age	58 years
Poor-Condition Traffic Exposure	100,835 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeForrester RD (s30) over Westside Main Canal — 11,714 vehicles/day Oldest Listed BridgeState Route 86 over Box Wash — built in 1919 All County BridgesBrowse every bridge record in Imperial County.

Top Bridges to Watch in Imperial County

Bridge	Reason	Condition	Daily Traffic	Year Built
Forrester RD (s30) over Westside Main Canal	Poor condition + traffic exposure	Poor	11,714	1950
State Route 86 NB over Biloxi Ditch	Poor condition + traffic exposure	Poor	7,300	1981
State Route 86 NB over Iberia Ditch	Poor condition + traffic exposure	Poor	7,300	1981
State Route 86 NB over Amerosa Ditch	Poor condition + traffic exposure	Poor	7,300	1981
State Route 86 NB over Verde Ditch	Poor condition + traffic exposure	Poor	7,300	1981
State Route 86 SB over Amerosa Ditch	Poor condition + traffic exposure	Poor	7,300	1989
State Route 86 SB over Verde Ditch	Poor condition + traffic exposure	Poor	7,300	1989
Picacho RD over Yuma Main Canal	Poor condition + traffic exposure	Poor	6,500	1925
Winterhaven Drive over California Wasteway	Poor condition + traffic exposure	Poor	6,010	1955
Picacho RD over Reservation Main Drain	Poor condition + traffic exposure	Poor	4,700	1977

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.