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Mn 23 over Split Rock Creek

Rock County, Minnesota · rated Good in the 2025 National Bridge Inventory

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

Mn 23 over Split Rock Creek in Rock County, Minnesota, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
It was built in 1995, making it 30 years old at the 2025 inventory.
It carries about 1,725 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 217 of the 266 inventoried bridges in Rock County rated good (81.6%); 5 (1.9%) are rated poor.
Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
It was rated fair in the 2024 inventory and is now good (culvert 6 to 7).
Its most recent inspection on record is dated October 2024, on a 24-month routine inspection cycle.
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

Component	Rating (2024)	Rating (2025)	FHWA scale meaning
Culvert	6	7	Good condition


Structure	Concrete culvert
Length	about 34 ft
Location	In Jasper
NBI structure number	97707
Condition class	Good
Traffic status (item 41)	Open, no restriction
Last inspection (item 90)	October 2024
Inspection interval (item 91)	24 months
Scour (item 113)	8: foundations stable, scour above the top of the footing

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

Bridge	Built	Vehicles/day	Condition
I 90 over Spring Water Creek	1960	15,110	Fair
I 90 over Elk Creek	1964	11,392	Fair
I 90 over Beaver Creek	1960	11,300	Fair
I 90 over Beaver Creek	1971	11,300	Fair
I 90 over Stream	1964	9,344	Good
US 75 over I 90	1992	9,172	Fair