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Township Road over Dirt Lodge Creek

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

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

Township Road over Dirt Lodge Creek in Corson 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 4 (poor condition) on the 0-9 scale.
It was built in 1932, making it 93 years old at the 2025 inventory.
It carries about 30 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 4 of the 49 inventoried bridges in Corson County rated poor (8.2%); 4 (8.2%) 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	Steel stringer or multi-beam girder
Length	about 34 ft
Location	2.2E & 12.9S Watauga
NBI structure number	000000016252149
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
Irr US012 over Claymore Ck	1958	1,378	Poor
Irr US012 over Deep Bank Ck	1965	1,091	Fair
Irr US012 over Br Snake Ck	1965	1,091	Fair
Irr US012 over Snake Ck	1966	1,091	Fair
Irr SD020 over Ck	2000	956	Good
Irr SD063 over Oak Ck	1980	864	Fair