Upper French Ck Rd over Ruby Ck

Custer County, South Dakota · rated Fair in the 2025 National Bridge Inventory

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

• Upper French Ck Rd over Ruby Ck in Custer County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
• It was built in 1973, making it 52 years old at the 2025 inventory.
• It carries about 40 vehicles a day (traffic count year 2022).
• Its listed owner is the county highway agency.
• It is one of 42 of the 94 inventoried bridges in Custer County rated fair (44.7%); 5 (5.3%) are rated poor.
• Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
• Its class is unchanged from 2024 (fair), but component ratings moved: substructure 6 to 7.
• Its most recent inspection on record is dated May 2024, on a 24-month routine inspection cycle.
• 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 → (43.76649, -103.65578)

Component ratings

Bridge details

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

Busiest bridges in Custer County

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

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