Iron County Bridge Report Card

Iron County scores 70 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C70 / 100

Local infrastructure snapshot

Iron County, Missouri

Iron County has 126 bridges in the National Bridge Inventory, with 13 rated poor and 0 rated scour-critical. Its poor-condition share of 10.3% is above the 8.8% statewide average. Poor-condition bridges carry about 5,437 daily vehicle crossings.

126Total Bridges

13Poor (10.3%)

76Fair (60.3%)

0Scour-Critical

Quote-Ready Local Facts

10.3%of county bridges are in poor condition, compared with 8.8% statewide and 6.7% nationally.

5,437daily vehicle crossings are on poor-condition bridges in the county.

0bridges are rated scour-critical, or 0.0% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Iron County a Bridge Condition Exposure Score of 70/100 (C). The county has 126 bridges in the National Bridge Inventory, including 13 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 5,437 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	10.3%	20.6
Poor-condition traffic exposure	25	4.9% of measured traffic	3.7
Scour-critical bridge share	20	0.0%	0.0
Average age vs national baseline	10	63 years vs 48 nationally	6.1
Traffic-data completeness	5	110,300 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	10.3%
State Poor-Condition Share	8.8%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.0%
Average Bridge Age	63 years
Poor-Condition Traffic Exposure	5,437 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeMo 49 S over Br — 973 vehicles/day Oldest Listed BridgeOld HWY 21 over Creek — built in 1922 All County BridgesBrowse every bridge record in Iron County.

Top Bridges to Watch in Iron County

Bridge	Reason	Condition	Daily Traffic	Year Built
Mo 49 S over Br	Poor condition + traffic exposure	Poor	973	1924
Mo 49 S over Up Rr	Poor condition + traffic exposure	Poor	973	1927
RT E E over Marble CR	Poor condition + traffic exposure	Poor	931	1936
Mo 32 E over Richardson CR	Poor condition + traffic exposure	Poor	860	1922
Thompson RD over Creek	Poor condition + traffic exposure	Poor	800	1930
RT U E over Br E Fk Cedar CR	Poor condition + traffic exposure	Poor	375	1922
N Main ST over Knob CR	Poor condition + traffic exposure	Poor	200	1972
Banner RD over Reid CR	Poor condition + traffic exposure	Poor	100	1950
County RD 020 over Cedar CR	Poor condition + traffic exposure	Poor	100	1950
Adam Creek RD over Abbott CR	Poor condition + traffic exposure	Poor	50	1998

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.