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Mn 23 over Three Mile Creek

Lyon County, Minnesota · rated Fair in the 2025 National Bridge Inventory

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

Mn 23 over Three Mile Creek in Lyon County, Minnesota, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
It was built in 1973, making it 52 years old at the 2025 inventory.
It carries about 4,677 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 51 of the 234 inventoried bridges in Lyon County rated fair (21.8%); 6 (2.6%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Prestressed concrete stringer or multi-beam girder
Length	about 150 ft
Location	5.9 Mi N of Jct Th 19
NBI structure number	42007
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 59 over Redwood River	1950	9,500	Fair
Mn 19 over Redwood River	1931	8,800	Fair
Mn 19 over Redwood River	1975	8,300	Fair
Mn 23 over Ditch	1999	5,910	Good
Mn 23 over Redwood River	1973	5,204	Fair
US 59 over Redwood R Diversion Chan	1962	5,200	Fair