Riverside County Bridge Report Card

Riverside County scores 81 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B81 / 100

Local infrastructure snapshot

Riverside County, California

Riverside County has 1,120 bridges in the National Bridge Inventory, with 18 rated poor and 85 rated scour-critical. Its poor-condition share of 1.6% is at or below the 4.9% statewide average. Poor-condition bridges carry about 238,324 daily vehicle crossings.

1,120Total Bridges

18Poor (1.6%)

462Fair (41.2%)

85Scour-Critical

Quote-Ready Local Facts

1.6%of county bridges are in poor condition, compared with 4.9% statewide and 6.7% nationally.

238,324daily vehicle crossings are on poor-condition bridges in the county.

85bridges are rated scour-critical, or 7.6% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Riverside County a Bridge Condition Exposure Score of 81/100 (B). The county has 1,120 bridges in the National Bridge Inventory, including 18 in poor condition and 85 rated scour-critical. Poor-condition bridges carry about 238,324 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	1.6%	3.2
Poor-condition traffic exposure	25	0.6% of measured traffic	0.5
Scour-critical bridge share	20	7.6%	15.2
Average age vs national baseline	10	49 years vs 48 nationally	0.3
Traffic-data completeness	5	38,575,512 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	1.6%
State Poor-Condition Share	4.9%
National Poor-Condition Share	6.7%
County Scour-Critical Share	7.6%
Average Bridge Age	49 years
Poor-Condition Traffic Exposure	238,324 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeInterstate 10 WB over Thousand Palms Wash — 33,000 vehicles/day Oldest Listed BridgeTemescal Canyon RD over Temescal Wash — built in 1924 All County BridgesBrowse every bridge record in Riverside County.

Top Bridges to Watch in Riverside County

Bridge	Reason	Condition	Daily Traffic	Year Built
State Route 62 WB over Mission Channel Overflow	Poor condition + traffic exposure	Poor	9,000	1966
Dillon Road over Whitewater River	Poor condition + traffic exposure	Poor	8,700	1950
Interstate 10 WB over Thousand Palms Wash	Poor condition + traffic exposure	Poor	33,000	1972
Interstate 10 EB over Thousand Palms Wash	Poor condition + traffic exposure	Poor	33,000	1972
Route 74 over Lake Elsinore Outlt Chnl	Poor condition + traffic exposure	Poor	29,580	1994
Monroe Street over Whitewater River	Poor condition + traffic exposure	Poor	22,400	1972
State Route 86 NB over Memel Ditch	Poor condition + traffic exposure	Poor	15,300	1979
State Route 86 NB over Cophy Ditch	Poor condition + traffic exposure	Poor	15,300	1979
State Route 86 SB over Memel Ditch	Poor condition + traffic exposure	Poor	15,300	1989
State Route 86 SB over Cophy Ditch	Poor condition + traffic exposure	Poor	15,300	1989

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.