Story County Bridge Report Card

Story County scores 67 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D67 / 100

Local infrastructure snapshot

Story County, Iowa

Story County has 302 bridges in the National Bridge Inventory, with 40 rated poor and 4 rated scour-critical. Its poor-condition share of 13.2% is at or below the 18.6% statewide average. Poor-condition bridges carry about 11,780 daily vehicle crossings.

302Total Bridges

40Poor (13.2%)

160Fair (53.0%)

4Scour-Critical

Quote-Ready Local Facts

13.2%of county bridges are in poor condition, compared with 18.6% statewide and 6.7% nationally.

11,780daily vehicle crossings are on poor-condition bridges in the county.

4bridges are rated scour-critical, or 1.3% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Story County a Bridge Condition Exposure Score of 67/100 (D). The county has 302 bridges in the National Bridge Inventory, including 40 in poor condition and 4 rated scour-critical. Poor-condition bridges carry about 11,780 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	13.2%	26.5
Poor-condition traffic exposure	25	1.2% of measured traffic	0.9
Scour-critical bridge share	20	1.3%	2.6
Average age vs national baseline	10	56 years vs 48 nationally	3.1
Traffic-data completeness	5	963,775 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	13.2%
State Poor-Condition Share	18.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.3%
Average Bridge Age	56 years
Poor-Condition Traffic Exposure	11,780 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeLincoln Way over Ioway Creek — 8,224 vehicles/day Oldest Listed BridgeLocal-dead End over Skunk River — built in 1876 All County BridgesBrowse every bridge record in Story County.

Top Bridges to Watch in Story County

Bridge	Reason	Condition	Daily Traffic	Year Built
No Name SE over Small Stream	Poor condition + traffic exposure	Poor	15	1918
Local-dead End over Skunk River	Poor condition + traffic exposure	Poor	11	1876
Lincoln Way over Ioway Creek	Poor condition + traffic exposure	Poor	8,224	1957
E15/115th ST over Long Dick Creek	Poor condition + traffic exposure	Poor	1,028	1964
8th ST over W Br Indian Creek	Poor condition + traffic exposure	Poor	535	1936
590th AVE over Grant 5 Open Ditch	Poor condition + traffic exposure	Poor	230	1938
325th ST over Rock Creek Overflow	Poor condition + traffic exposure	Poor	190	1953
280th ST over Grant 5 Open Ditch Ext	Poor condition + traffic exposure	Poor	131	1916
190th ST over Ioway Creek	Poor condition + traffic exposure	Poor	120	1900
115th ST over Bear Creek	Poor condition + traffic exposure	Poor	120	1955

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.