Chouteau County Bridge Report Card

Chouteau County scores 81 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B81 / 100

Local infrastructure snapshot

Chouteau County, Montana

Chouteau County has 43 bridges in the National Bridge Inventory, with 2 rated poor and 1 rated scour-critical. Its poor-condition share of 4.7% is at or below the 7.4% statewide average. Poor-condition bridges carry about 1,030 daily vehicle crossings.

43Total Bridges

2Poor (4.7%)

16Fair (37.2%)

1Scour-Critical

Quote-Ready Local Facts

4.7%of county bridges are in poor condition, compared with 7.4% statewide and 6.7% nationally.

1,030daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 2.3% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Chouteau County a Bridge Condition Exposure Score of 81/100 (B). The county has 43 bridges in the National Bridge Inventory, including 2 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 1,030 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	4.7%	9.3
Poor-condition traffic exposure	25	7.3% of measured traffic	5.5
Scour-critical bridge share	20	2.3%	4.7
Average age vs national baseline	10	43 years vs 48 nationally	0.0
Traffic-data completeness	5	14,162 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	4.7%
State Poor-Condition Share	7.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	2.3%
Average Bridge Age	43 years
Poor-Condition Traffic Exposure	1,030 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeS 80-13th ST over Missouri River — 930 vehicles/day Oldest Listed BridgeBishop Creek RD over Shonkin Creek 016 — built in 1930 All County BridgesBrowse every bridge record in Chouteau County.

Top Bridges to Watch in Chouteau County

Bridge	Reason	Condition	Daily Traffic	Year Built
S 80-13th ST over Missouri River	Poor condition + traffic exposure	Poor	930	1962
Upper Highwood CR over Highwood Creek 069	Poor condition + traffic exposure	Poor	100	1969
Lander Crossing over Highwood Creek 060	Scour-critical foundation rating	Fair	100	1986
US 87 over Abandoned Railroad	High traffic	Fair	1,727	1974
IRR - US 87 over School Section Coulee	High traffic	Good	1,694	1970
IRR - US 87 over Big Sandy Creek	High traffic	Good	1,694	1990
US 87 over Marias River	High traffic	Good	1,417	1988
S 80 over Rr	High traffic	Fair	849	1953
S 80 over Shonkin Creek	High traffic	Good	696	2003
S 223 over Teton River	High traffic	Fair	541	1953

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.