Boundary County Bridge Report Card

Boundary 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

Boundary County, Idaho

Boundary County has 83 bridges in the National Bridge Inventory, with 11 rated poor and 5 rated scour-critical. Its poor-condition share of 13.3% is above the 5.4% statewide average. Poor-condition bridges carry about 1,630 daily vehicle crossings.

83Total Bridges

11Poor (13.3%)

47Fair (56.6%)

5Scour-Critical

Quote-Ready Local Facts

13.3%of county bridges are in poor condition, compared with 5.4% statewide and 6.7% nationally.

1,630daily vehicle crossings are on poor-condition bridges in the county.

5bridges are rated scour-critical, or 6.0% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Boundary County a Bridge Condition Exposure Score of 60/100 (D). The county has 83 bridges in the National Bridge Inventory, including 11 in poor condition and 5 rated scour-critical. Poor-condition bridges carry about 1,630 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	13.3%	26.5
Poor-condition traffic exposure	25	2.3% of measured traffic	1.7
Scour-critical bridge share	20	6.0%	12.0
Average age vs national baseline	10	43 years vs 48 nationally	0.0
Traffic-data completeness	5	69,960 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	13.3%
State Poor-Condition Share	5.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	6.0%
Average Bridge Age	43 years
Poor-Condition Traffic Exposure	1,630 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeS5907;deep Crk Lp over Bnrr;uprr & Deep Creek — 900 vehicles/day Oldest Listed BridgeStc 5803;moyie Rvr over Moyie River;meadow Creek — built in 1928 All County BridgesBrowse every bridge record in Boundary County.

Top Bridges to Watch in Boundary County

Bridge	Reason	Condition	Daily Traffic	Year Built
Fs Route No. 2450 over Blue Joe Creek	Poor condition + traffic exposure	Poor	50	1953
S5907;deep Crk Lp over Bnrr;uprr & Deep Creek	Poor condition + traffic exposure	Poor	900	1936
Stc 5804;westside over Myrtle Creek	Poor condition + traffic exposure	Poor	300	1958
Fs Route No 2546 over Blue Joe Creek Upper	Poor condition + traffic exposure	Poor	50	1953
Fs Route No. 2798 over Canuck Creek	Poor condition + traffic exposure	Poor	50	1957
Fs Route No. 427 over Boulder CR Callahan	Poor condition + traffic exposure	Poor	50	1961
Fs Route No. 211 over Meadow Creek	Poor condition + traffic exposure	Poor	50	1961
Fs Route No. 1009 over Grass Creek	Poor condition + traffic exposure	Poor	50	1972
Fs Route No. 636 over Grass Creek	Poor condition + traffic exposure	Poor	50	1973
Fs Route No. 871 over E.f.canuck CR	Poor condition + traffic exposure	Poor	50	1990

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.