Tuolumne County Bridge Report Card

Tuolumne County scores 68 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D68 / 100

Local infrastructure snapshot

Tuolumne County, California

Tuolumne County has 125 bridges in the National Bridge Inventory, with 8 rated poor and 3 rated scour-critical. Its poor-condition share of 6.4% is above the 4.9% statewide average. Poor-condition bridges carry about 47,980 daily vehicle crossings.

125Total Bridges

8Poor (6.4%)

72Fair (57.6%)

3Scour-Critical

Quote-Ready Local Facts

6.4%of county bridges are in poor condition, compared with 4.9% statewide and 6.7% nationally.

47,980daily vehicle crossings are on poor-condition bridges in the county.

3bridges are rated scour-critical, or 2.4% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Tuolumne County a Bridge Condition Exposure Score of 68/100 (D). The county has 125 bridges in the National Bridge Inventory, including 8 in poor condition and 3 rated scour-critical. Poor-condition bridges carry about 47,980 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	6.4%	12.8
Poor-condition traffic exposure	25	12.2% of measured traffic	9.1
Scour-critical bridge share	20	2.4%	4.8
Average age vs national baseline	10	62 years vs 48 nationally	5.5
Traffic-data completeness	5	394,048 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	6.4%
State Poor-Condition Share	4.9%
National Poor-Condition Share	6.7%
County Scour-Critical Share	2.4%
Average Bridge Age	62 years
Poor-Condition Traffic Exposure	47,980 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeMono Way over Sullivan Creek — 25,060 vehicles/day Oldest Listed BridgeNo Data Entered over Tramway — built in 1900 All County BridgesBrowse every bridge record in Tuolumne County.

Top Bridges to Watch in Tuolumne County

Bridge	Reason	Condition	Daily Traffic	Year Built
Winding Road over Blue Canyon Creek	Poor condition + traffic exposure	Poor	50	1968
Mono Way over Sullivan Creek	Poor condition + traffic exposure	Poor	25,060	1991
SR 108 over Mono Way	Poor condition + traffic exposure	Poor	17,450	2004
State Route 120 over Chinese Creek	Poor condition + traffic exposure	Poor	2,800	1914
Parrotts Ferry RD over New Melones Reservoir	Poor condition + traffic exposure	Poor	2,500	1978
Winding Road over Stanislaus River	Poor condition + traffic exposure	Poor	50	1926
Winding Road over Upper Hunter Creek	Poor condition + traffic exposure	Poor	50	1969
Italian Bar RD over Rose Creek	Poor condition + traffic exposure	Poor	20	1925
Algerine RD over Curtis Creek	Scour-critical foundation rating	Fair	265	1925
Alg Wards Ferry RD over Blanket Creek	Scour-critical foundation rating	Fair	55	1936

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.