Local Road over Overflow

Lyon County, Iowa · rated Poor in the 2025 National Bridge Inventory

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

• Local Road over Overflow in Lyon County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 0 (failed condition, out of service) on the 0-9 scale.
• It was built in 1900 and reconstructed in 1999, making it 125 years old at the 2025 inventory.
• It carries about 26 vehicles a day (traffic count year 2022).
• Its listed owner is the county highway agency.
• It is one of 70 of the 273 inventoried bridges in Lyon County rated poor (25.6%); 70 (25.6%) are rated poor.
• Its traffic status in the 2025 inventory is closed to all traffic (NBI item 41).
• Its class is unchanged from 2024 (poor), but component ratings moved: deck 7 to 0, superstructure 4 to 0, substructure 3 to 0.
• Status change: newly closed since 2024.
• Its most recent inspection on record is dated July 2024, on a 24-month routine inspection cycle.
• It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
• A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

View this bridge on a map → (43.26514, -95.90174)

Component ratings

Bridge details

Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.

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