Local over Troublesome Creek

Audubon County, Iowa · rated Fair in the 2025 National Bridge Inventory

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

• Local over Troublesome Creek in Audubon County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
• It was built in 1959 and reconstructed in 2017, making it 66 years old at the 2025 inventory.
• It carries about 21 vehicles a day (traffic count year 2022).
• Its listed owner is the county highway agency.
• It is one of 96 of the 204 inventoried bridges in Audubon County rated fair (47.1%); 37 (18.1%) are rated poor.
• Its traffic status in the 2025 inventory is posted for load (NBI item 41).
• Its condition class and component ratings are unchanged from the 2024 inventory.
• Its most recent inspection on record is dated May 2023, on a 24-month routine inspection cycle.
• It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
• A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

View this bridge on a map → (41.55832, -94.82186)

Component ratings

Bridge details

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

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