Tama County Bridge Report Card

Tama County scores 51 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F51 / 100

Local infrastructure snapshot

Tama County, Iowa

Tama County has 337 bridges in the National Bridge Inventory, with 107 rated poor and 1 rated scour-critical. Its poor-condition share of 31.8% is above the 18.6% statewide average. Poor-condition bridges carry about 19,783 daily vehicle crossings.

337Total Bridges

107Poor (31.8%)

106Fair (31.5%)

1Scour-Critical

Quote-Ready Local Facts

31.8%of county bridges are in poor condition, compared with 18.6% statewide and 6.7% nationally.

19,783daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 0.3% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Tama County a Bridge Condition Exposure Score of 51/100 (F). The county has 337 bridges in the National Bridge Inventory, including 107 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 19,783 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	31.8%	40.0
Poor-condition traffic exposure	25	11.1% of measured traffic	8.3
Scour-critical bridge share	20	0.3%	0.6
Average age vs national baseline	10	47 years vs 48 nationally	0.0
Traffic-data completeness	5	178,704 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	31.8%
State Poor-Condition Share	18.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.3%
Average Bridge Age	47 years
Poor-Condition Traffic Exposure	19,783 vehicles/day

Bridges to Watch

Busiest Poor-Condition Bridge5th ST E over Drainage — 1,054 vehicles/day Oldest Listed BridgeLocal over Wolf Creek — built in 1895 All County BridgesBrowse every bridge record in Tama County.

Top Bridges to Watch in Tama County

Bridge	Reason	Condition	Daily Traffic	Year Built
5th ST E over Drainage	Poor condition + traffic exposure	Poor	1,054	1915
Center ST over Deer Creek	Poor condition + traffic exposure	Poor	1,019	1982
North Main ST over Small Stream	Poor condition + traffic exposure	Poor	869	1962
FM over Iowa River Overflow	Poor condition + traffic exposure	Poor	786	1967
FM over Iowa River Overflow	Poor condition + traffic exposure	Poor	786	1968
FM over Iowa River	Poor condition + traffic exposure	Poor	786	1968
East ST over Wolf Creek	Poor condition + traffic exposure	Poor	779	1950
FM over Br Iowa River	Poor condition + traffic exposure	Poor	717	1995
FM over Branch Iowa River	Poor condition + traffic exposure	Poor	678	1965
E66 over Plague Mine Creek	Poor condition + traffic exposure	Poor	650	1976

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.