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420TH Avenue over Creek

Marshall County, South Dakota · rated Good in the 2025 National Bridge Inventory

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

420TH Avenue over Creek in Marshall County, South Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
It was built in 2014, making it 11 years old at the 2025 inventory.
It carries about 35 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 7 of the 38 inventoried bridges in Marshall County rated good (18.4%); 13 (34.2%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Prestressed concrete tee beam
Length	about 44 ft
Location	3.2N & 1E Langford
NBI structure number	000000046080198
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
SD010 over Crow Ck	1942	1,344	Fair
SD010 over Drainage Ditch	1948	945	Fair
Irr SD010 over Clear Lake Inlet	1993	692	Good
SD027 over Trib Spain Ditch	1959	613	Fair
SD027 over Dry Run Ck	1980	601	Fair
SD027 over Ck	1980	601	Fair