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Cedar Street over Marne Creek

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

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

Cedar Street over Marne Creek in Yankton County, South Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 3 (serious condition) on the 0-9 scale.
It was built in 1978, making it 47 years old at the 2025 inventory.
It carries about 969 vehicles a day (traffic count year 2022).
Its listed owner is a city or municipal highway agency.
It is one of 13 of the 99 inventoried bridges in Yankton County rated poor (13.1%); 13 (13.1%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings


Structure	Prestressed concrete tee beam
Length	about 100 ft
Location	Cedar Street - Yankton
NBI structure number	000000068121204
Condition class	Poor

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