Park County Bridge Report Card

Park County scores 58 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F58 / 100

Local infrastructure snapshot

Park County, Montana

Park County has 126 bridges in the National Bridge Inventory, with 13 rated poor and 15 rated scour-critical. Its poor-condition share of 10.3% is above the 7.4% statewide average. Poor-condition bridges carry about 3,977 daily vehicle crossings.

126Total Bridges

13Poor (10.3%)

86Fair (68.3%)

15Scour-Critical

Quote-Ready Local Facts

10.3%of county bridges are in poor condition, compared with 7.4% statewide and 6.7% nationally.

3,977daily vehicle crossings are on poor-condition bridges in the county.

15bridges are rated scour-critical, or 11.9% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Park County a Bridge Condition Exposure Score of 58/100 (F). The county has 126 bridges in the National Bridge Inventory, including 13 in poor condition and 15 rated scour-critical. Poor-condition bridges carry about 3,977 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	10.3%	20.6
Poor-condition traffic exposure	25	1.8% of measured traffic	1.4
Scour-critical bridge share	20	11.9%	20.0
Average age vs national baseline	10	49 years vs 48 nationally	0.4
Traffic-data completeness	5	218,600 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	10.3%
State Poor-Condition Share	7.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	11.9%
Average Bridge Age	49 years
Poor-Condition Traffic Exposure	3,977 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUS 89 over Int East Livingston I 90 — 2,910 vehicles/day Oldest Listed BridgeCottonwood Bench R over Cottonwood Creek 030 — built in 1908 All County BridgesBrowse every bridge record in Park County.

Top Bridges to Watch in Park County

Bridge	Reason	Condition	Daily Traffic	Year Built
Main Boulder Road over Boulder River	Poor condition + traffic exposure	Poor	157	1950
Elk Creek RD over Shields River 018	Poor condition + traffic exposure	Poor	100	1960
Hammond Creek RD over Rock Creek 025	Poor condition + traffic exposure	Poor	100	1967
US 89 over Int East Livingston I 90	Poor condition + traffic exposure	Poor	2,910	1962
Nf-6639 RD over Boulder River 041	Poor condition + traffic exposure	Poor	157	1933
Potter Creek RD over Potter Creek 005	Poor condition + traffic exposure	Poor	100	1915
Shields River RD E over Shields River 023	Poor condition + traffic exposure	Poor	100	1923
Shields River RD E over Shields River Overfl 022	Poor condition + traffic exposure	Poor	100	1938
Swandal RD over Flathead Creek 073	Poor condition + traffic exposure	Poor	100	1970
Swingley RD over W Boulder River 038	Poor condition + traffic exposure	Poor	52	1938

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.