San Juan County Bridge Report Card

San Juan County scores 60 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D60 / 100

Local infrastructure snapshot

San Juan County, Colorado

San Juan County has 12 bridges in the National Bridge Inventory, with 1 rated poor and 1 rated scour-critical. Its poor-condition share of 8.3% is above the 4.6% statewide average. Poor-condition bridges carry about 647 daily vehicle crossings.

12Total Bridges

1Poor (8.3%)

7Fair (58.3%)

1Scour-Critical

Quote-Ready Local Facts

8.3%of county bridges are in poor condition, compared with 4.6% statewide and 6.7% nationally.

647daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 8.3% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives San Juan County a Bridge Condition Exposure Score of 60/100 (D). The county has 12 bridges in the National Bridge Inventory, including 1 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 647 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	8.3%	16.7
Poor-condition traffic exposure	25	8.3% of measured traffic	6.2
Scour-critical bridge share	20	8.3%	16.7
Average age vs national baseline	10	44 years vs 48 nationally	0.0
Traffic-data completeness	5	7,821 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	8.3%
State Poor-Condition Share	4.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	8.3%
Average Bridge Age	44 years
Poor-Condition Traffic Exposure	647 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeGreene Street over Cement Creek — 647 vehicles/day Oldest Listed BridgeGreene Street over Cement Creek — built in 1929 All County BridgesBrowse every bridge record in San Juan County.

Top Bridges to Watch in San Juan County

Bridge	Reason	Condition	Daily Traffic	Year Built
Greene Street over Cement Creek	Poor condition + traffic exposure	Poor	647	1929
US 550 Ml over Cascade Creek	High traffic	Fair	1,900	1949
US 550 Ml over Mineral Creek	High traffic	Good	1,900	2011
County Road 2 over Cunningham Creek	High traffic	Fair	997	1989
County Road 2 over Animas River	High traffic	Fair	920	1988
14th Street over Cement Creek	High traffic	Fair	647	1993
14th Street over Animas River	High traffic	Fair	265	1992
County Road 8 over Mineral Creek	High traffic	Good	199	1993
County Road 2 over Animas River	High traffic	Fair	178	1992
County Road 21 over Animas River	High traffic	Fair	81	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.