10 Mile Road over Grindstone Ck

Haakon County, South Dakota · rated Good in the 2025 National Bridge Inventory

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

• 10 Mile Road over Grindstone Ck in Haakon County, South Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
• It was built in 1965, making it 60 years old at the 2025 inventory.
• It carries about 80 vehicles a day (traffic count year 2022).
• Its listed owner is the county highway agency.
• It is one of 23 of the 69 inventoried bridges in Haakon County rated good (33.3%); 8 (11.6%) are rated poor.
• Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
• It was rated fair in the 2024 inventory and is now good (deck 6 to 7, superstructure 6 to 7).
• Its most recent inspection on record is dated September 2024, on a 24-month routine inspection cycle.
• A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

View this bridge on a map → (44.18281, -101.73313)

Component ratings

Bridge details

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

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