Bonneville County Bridge Report Card

Bonneville County scores 93 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

A93 / 100

Local infrastructure snapshot

Bonneville County, Idaho

Bonneville County has 213 bridges in the National Bridge Inventory, with 3 rated poor and 2 rated scour-critical. Its poor-condition share of 1.4% is at or below the 5.4% statewide average. Poor-condition bridges carry about 47,600 daily vehicle crossings.

213Total Bridges

3Poor (1.4%)

141Fair (66.2%)

2Scour-Critical

Quote-Ready Local Facts

1.4%of county bridges are in poor condition, compared with 5.4% statewide and 6.7% nationally.

47,600daily vehicle crossings are on poor-condition bridges in the county.

2bridges are rated scour-critical, or 0.9% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Bonneville County a Bridge Condition Exposure Score of 93/100 (A). The county has 213 bridges in the National Bridge Inventory, including 3 in poor condition and 2 rated scour-critical. Poor-condition bridges carry about 47,600 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	1.4%	2.8
Poor-condition traffic exposure	25	3.6% of measured traffic	2.7
Scour-critical bridge share	20	0.9%	1.9
Average age vs national baseline	10	48 years vs 48 nationally	0.0
Traffic-data completeness	5	1,329,889 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	1.4%
State Poor-Condition Share	5.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.9%
Average Bridge Age	48 years
Poor-Condition Traffic Exposure	47,600 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeS 25 E; S Hitt RD over Sand Creek — 27,500 vehicles/day Oldest Listed BridgeNhs8031;old Butte over E Lateral Canal — built in 1928 All County BridgesBrowse every bridge record in Bonneville County.

Top Bridges to Watch in Bonneville County

Bridge	Reason	Condition	Daily Traffic	Year Built
S 25 E; S Hitt RD over Sand Creek	Poor condition + traffic exposure	Poor	27,500	1994
Stp7046;lincoln RD over Idaho Canal	Poor condition + traffic exposure	Poor	18,000	1984
N 45th E over Sand Creek	Poor condition + traffic exposure	Poor	2,100	1957
Stc6731;w 145 N over Snake River	Scour-critical foundation rating	Fair	2,800	1967
US 20 over Porter Canal	High traffic	Fair	38,000	1966
US 20 Ebl & Wbl over Snake R.;johns Hole Br.	High traffic	Fair	38,000	1966
US 20 over Sma 7096;riverside Dr.ic	High traffic	Fair	38,000	1969
US 20 over Sage Canal	High traffic	Fair	34,500	1970
US 20 over Uprr	High traffic	Fair	32,000	1966
US 20 Wbl & Ebl over Sma 7076;lindsay Blvd.ic	High traffic	Fair	32,000	1966

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.