T 18 over Rock River

Pipestone County, Minnesota · rated Poor in the 2025 National Bridge Inventory

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

• T 18 over Rock River in Pipestone County, Minnesota, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
• It was built in 1984, making it 41 years old at the 2025 inventory.
• It carries about 22 vehicles a day (traffic count year 1986).
• Its listed owner is a town or township highway agency.
• It is one of 6 of the 185 inventoried bridges in Pipestone County rated poor (3.2%); 6 (3.2%) are rated poor.
• Its traffic status in the 2025 inventory is posted for load (NBI item 41).
• It was rated fair in the 2024 inventory and is now poor (deck 5 to 4, superstructure 5 to 4, substructure 5 to 4).
• Its most recent inspection on record is dated October 2024, on a 24-month routine inspection cycle.
• 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 → (43.93571, -96.13624)

Component ratings

Bridge details

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

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