Bridge conditions in Minidoka County, Idaho

67 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Minidoka County tracks close to typical: 1 of its 67 inventoried bridges (1.5%) are rated poor, against a national rate of about 7%.

• 1 of the 67 bridges in Minidoka County, Idaho, are rated in poor condition (1.5%) in the 2025 National Bridge Inventory, as of August 20, 2026.
• 21 bridges (31.3%) are rated good and 45 (67.2%) fair.
• The median Minidoka County bridge was built in 1979.
• The busiest poor-rated bridge is STC2866;BASELINE R over Snake R.(montgomery Br) (built 1954), carrying about 1,500 vehicles a day.

Good 31.3% · Fair 67.2% · Poor 1.5% of 67 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Busiest bridges in the county

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

All of Idaho: Idaho bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.