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Irr Bia Rte 7 over Little White River

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

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

Irr Bia Rte 7 over Little White River in Todd 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 superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1972, making it 53 years old at the 2025 inventory.
It carries about 1,851 vehicles a day (traffic count year 2024).
It is one of 7 of the 27 inventoried bridges in Todd County rated poor (25.9%); 7 (25.9%) 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 109 ft
Location	at Ghost Hawk Park
NBI structure number	00000000000A031
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 US083 over Antelope Ck	1981	2,544	Fair
Main Street over Antelope Ck	1978	1,400	Fair
Irr US018 over Little White Rv	1989	1,340	Fair
Irr US018 over Trib to Oak Ck	2005	1,303	Fair
Irr US018 over White Horse Ck	2016	1,303	Fair
Irr Bia Rte 5 over Little White River	2016	1,096	Good