Mono County Bridge Report Card

Mono County scores 84 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B84 / 100

Local infrastructure snapshot

Mono County, California

Mono County has 56 bridges in the National Bridge Inventory, with 3 rated poor and 1 rated scour-critical. Its poor-condition share of 5.4% is above the 4.9% statewide average. Poor-condition bridges carry about 152 daily vehicle crossings.

56Total Bridges

3Poor (5.4%)

18Fair (32.1%)

1Scour-Critical

Quote-Ready Local Facts

5.4%of county bridges are in poor condition, compared with 4.9% statewide and 6.7% nationally.

152daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 1.8% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Mono County a Bridge Condition Exposure Score of 84/100 (B). The county has 56 bridges in the National Bridge Inventory, including 3 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 152 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	5.4%	10.7
Poor-condition traffic exposure	25	0.1% of measured traffic	0.1
Scour-critical bridge share	20	1.8%	3.6
Average age vs national baseline	10	53 years vs 48 nationally	1.9
Traffic-data completeness	5	160,839 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	5.4%
State Poor-Condition Share	4.9%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.8%
Average Bridge Age	53 years
Poor-Condition Traffic Exposure	152 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeCunningham Lane over West Walker River — 82 vehicles/day Oldest Listed BridgeLower Rock Crk RD over Rock Creek — built in 1920 All County BridgesBrowse every bridge record in Mono County.

Top Bridges to Watch in Mono County

Bridge	Reason	Condition	Daily Traffic	Year Built
Cunningham Lane over West Walker River	Poor condition + traffic exposure	Poor	82	1951
32017 over Buckeye Creek	Poor condition + traffic exposure	Poor	50	1960
Forest Road 62 over Wolf Creek	Poor condition + traffic exposure	Poor	20	1979
U.s. Highway 395 over Rickey Ditch Overflow	Scour-critical foundation rating	Good	6,950	1965
U.s. Highway 395 over Crooked Creek	High traffic	Fair	13,100	1970
US Highway 395 SB over State Route 203	High traffic	Fair	9,500	1969
US Highway 395 SB over Mammoth Creek	High traffic	Good	8,450	1969
U.s. Highway 395 over Roadside Drainage Ditch	High traffic	Good	7,450	1989
US Highway 395 NB over Mammoth Creek	High traffic	Good	7,000	1969
U.s. Highway 395 over South Branch Robinson CR	High traffic	Good	6,950	1934

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.