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44780 301ST Street over Clay Creek

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

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

44780 301ST Street over Clay Creek in Yankton 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 substructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 2020, making it 5 years old at the 2025 inventory.
It carries about 50 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 44 of the 99 inventoried bridges in Yankton County rated fair (44.4%); 13 (13.1%) 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	Steel stringer or multi-beam girder
Length	about 89 ft
Location	4.2W & 4.0S of Irene
NBI structure number	000000068198100
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US081 over Marne Ck	1959	16,870	Fair
SD050 over Marne Ck	1971	9,753	Fair
US081 over Missouri Rv	2007	7,755	Fair
SD052 over Ck	1988	6,711	Fair
W 21ST Street over Marne Creek	1973	6,324	Good
Burleigh Street over Marne Creek	1989	4,996	Good