Guthrie County Bridge Report Card

Guthrie County scores 47 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F47 / 100

Local infrastructure snapshot

Guthrie County, Iowa

Guthrie County has 263 bridges in the National Bridge Inventory, with 94 rated poor and 7 rated scour-critical. Its poor-condition share of 35.7% is above the 18.6% statewide average. Poor-condition bridges carry about 5,877 daily vehicle crossings.

263Total Bridges

94Poor (35.7%)

104Fair (39.5%)

7Scour-Critical

Quote-Ready Local Facts

35.7%of county bridges are in poor condition, compared with 18.6% statewide and 6.7% nationally.

5,877daily vehicle crossings are on poor-condition bridges in the county.

7bridges are rated scour-critical, or 2.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Guthrie County a Bridge Condition Exposure Score of 47/100 (F). The county has 263 bridges in the National Bridge Inventory, including 94 in poor condition and 7 rated scour-critical. Poor-condition bridges carry about 5,877 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	35.7%	40.0
Poor-condition traffic exposure	25	9.0% of measured traffic	6.8
Scour-critical bridge share	20	2.7%	5.3
Average age vs national baseline	10	49 years vs 48 nationally	0.5
Traffic-data completeness	5	65,104 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	35.7%
State Poor-Condition Share	18.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	2.7%
Average Bridge Age	49 years
Poor-Condition Traffic Exposure	5,877 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeF 65 over Middle River — 996 vehicles/day Oldest Listed BridgeLocal over Brushy Ck — built in 1910 All County BridgesBrowse every bridge record in Guthrie County.

Top Bridges to Watch in Guthrie County

Bridge	Reason	Condition	Daily Traffic	Year Built
FM over Troublesome Creek	Poor condition + traffic exposure	Poor	40	1948
Local over Stream	Poor condition + traffic exposure	Poor	29	1959
Local over Trib To Mason Creek	Poor condition + traffic exposure	Poor	20	1957
Local over Small Creek	Poor condition + traffic exposure	Poor	15	1949
F 65 over Middle River	Poor condition + traffic exposure	Poor	996	1959
FM over Middle River	Poor condition + traffic exposure	Poor	450	1969
FM over Small Creek	Poor condition + traffic exposure	Poor	417	1965
W South ST over Middle Raccoon River	Poor condition + traffic exposure	Poor	358	1965
FM over South Raccoon River	Poor condition + traffic exposure	Poor	329	1975
Local over Seeley Creek	Poor condition + traffic exposure	Poor	199	1968

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.