Madison County Bridge Report Card

Madison County scores 90 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

A90 / 100

Local infrastructure snapshot

Madison County, Idaho

Madison County has 80 bridges in the National Bridge Inventory, with 0 rated poor and 4 rated scour-critical. Its poor-condition share of 0.0% is at or below the 5.4% statewide average.

80Total Bridges

0Poor (0.0%)

54Fair (67.5%)

4Scour-Critical

Quote-Ready Local Facts

0.0%of county bridges are in poor condition, compared with 5.4% statewide and 6.7% nationally.

0daily vehicle crossings are on poor-condition bridges in the county.

4bridges are rated scour-critical, or 5.0% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Madison County a Bridge Condition Exposure Score of 90/100 (A). The county has 80 bridges in the National Bridge Inventory, including 0 in poor condition and 4 rated scour-critical. Poor-condition bridges carry about 0 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	0.0%	0.0
Poor-condition traffic exposure	25	0.0% of measured traffic	0.0
Scour-critical bridge share	20	5.0%	10.0
Average age vs national baseline	10	44 years vs 48 nationally	0.0
Traffic-data completeness	5	264,705 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	0.0%
State Poor-Condition Share	5.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	5.0%
Average Bridge Age	44 years
Poor-Condition Traffic Exposure	0 vehicles/day

Bridges to Watch

Oldest Listed BridgeSH 33 over Rexburg Canal — built in 1938 All County BridgesBrowse every bridge record in Madison County.

Top Bridges to Watch in Madison County

Bridge	Reason	Condition	Daily Traffic	Year Built
US 20 Wbl over S.fk.teton River	Scour-critical foundation rating	Fair	10,000	1980
US 20 Ebl over S.fk.teton River	Scour-critical foundation rating	Fair	10,000	1980
Stc 6774;e 2000 N over S.fk.teton River	Scour-critical foundation rating	Fair	1,500	1959
Stc 6760;w4000n over N.fk.snake R.;hibbard Br	Scour-critical foundation rating	Fair	1,000	1968
SH 33 over Rexburg Canal	High traffic	Fair	20,000	1938
SH 33 over S.fk.teton River	High traffic	Fair	17,000	1971
US 20 Ebl over Stp 7726;s.rexburg Ic	High traffic	Good	15,750	1981
US 20 Wbl over Stp 7726;s.rexburg Ic	High traffic	Good	15,750	1981
US 20 Ebl over Texas Slough	High traffic	Good	15,250	1981
US 20 Wbl over Texas Slough	High traffic	Good	15,250	1981

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.