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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.
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.

Component ratings


Structure	Prestressed concrete tee beam
Length	about 25 ft
Location	2.8W Custer
NBI structure number	000000017201071
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US016 over French Ck	1966	10,052	Fair
US016 over Ck	1966	10,052	Good
US016A over Laughing Water Ck	1964	6,829	Good
SD079 over Battle Ck	1997	6,610	Good
US016 over French Ck	1974	3,709	Fair
US016 over French Ck	1974	3,709	Fair