Blaine County Bridge Report Card

Blaine County scores 56 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F56 / 100

Local infrastructure snapshot

Blaine County, Montana

Blaine County has 102 bridges in the National Bridge Inventory, with 10 rated poor and 3 rated scour-critical. Its poor-condition share of 9.8% is above the 7.4% statewide average. Poor-condition bridges carry about 13,031 daily vehicle crossings.

102Total Bridges

10Poor (9.8%)

57Fair (55.9%)

3Scour-Critical

Quote-Ready Local Facts

9.8%of county bridges are in poor condition, compared with 7.4% statewide and 6.7% nationally.

13,031daily vehicle crossings are on poor-condition bridges in the county.

3bridges are rated scour-critical, or 2.9% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Blaine County a Bridge Condition Exposure Score of 56/100 (F). The county has 102 bridges in the National Bridge Inventory, including 10 in poor condition and 3 rated scour-critical. Poor-condition bridges carry about 13,031 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	9.8%	19.6
Poor-condition traffic exposure	25	19.4% of measured traffic	14.5
Scour-critical bridge share	20	2.9%	5.9
Average age vs national baseline	10	57 years vs 48 nationally	3.6
Traffic-data completeness	5	67,240 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	9.8%
State Poor-Condition Share	7.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	2.9%
Average Bridge Age	57 years
Poor-Condition Traffic Exposure	13,031 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeIRR - US 2 over Milk River — 3,311 vehicles/day Oldest Listed BridgeCounty Road 323 over Snake Creek 048 — built in 1911 All County BridgesBrowse every bridge record in Blaine County.

Top Bridges to Watch in Blaine County

Bridge	Reason	Condition	Daily Traffic	Year Built
IRR - US 2 over Milk River	Poor condition + traffic exposure	Poor	3,311	1964
US 2 over Irrigation-stockpass	Poor condition + traffic exposure	Poor	2,335	1940
US 2 over Lodge Creek	Poor condition + traffic exposure	Poor	2,335	1942
US 2 over Drainage	Poor condition + traffic exposure	Poor	2,141	1940
US 2 over Drainage	Poor condition + traffic exposure	Poor	2,141	1940
S 529-clear CR RD over Milk River	Poor condition + traffic exposure	Poor	256	1967
Redrock RD over Fort Belknap Canal 008	Poor condition + traffic exposure	Poor	212	1933
Middle RD over Battle Creek 056	Poor condition + traffic exposure	Poor	100	1920
Ekegren RD over Thirty Mile Creek 097	Poor condition + traffic exposure	Poor	100	1938
Lodge Creek RD over Fort Belknap Canal	Poor condition + traffic exposure	Poor	100	1952

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.