Home › South Dakota › Deuel County › Twnshp Rd 480 Av over Mud Creek

Twnshp Rd 480 Av over Mud Creek

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

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

Twnshp Rd 480 Av over Mud Creek in Deuel 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 1950, making it 75 years old at the 2025 inventory.
It carries about 25 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 13 of the 72 inventoried bridges in Deuel County rated poor (18.1%); 13 (18.1%) 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	Steel stringer or multi-beam girder
Length	about 35 ft
Location	4E & 5.4N Tunerville
NBI structure number	000000020140006
Condition class	Poor

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

Bridge	Built	Vehicles/day	Condition
I029 over Deer Ck	1971	7,560	Fair
I029 S over 471 Ave	1973	4,870	Fair
I029 N over 471 Ave	1973	4,870	Fair
I029 S over Peg Munky Run Ck	1973	4,870	Fair
I029 N over Peg Munky Run Ck	1973	4,870	Fair
I029 S over 184 St	1973	4,830	Fair