SD020 over Little Missouri Rv

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

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

• SD020 over Little Missouri Rv in Harding 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 8 (very good condition) on the 0-9 scale.
• It was built in 2021, making it 4 years old at the 2025 inventory.
• It carries about 112 vehicles a day (traffic count year 2024).
• Its listed owner is the state highway agency.
• It is one of 25 of the 49 inventoried bridges in Harding County rated good (51.0%); 1 (2.0%) are rated poor.
• 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 → (45.5485, -103.9705)

Component ratings

Bridge details

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

Busiest bridges in Harding County

All bridges nearby: Harding County, SD bridge conditions · every bridge in Harding County · South Dakota bridges.

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