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M 309 over Spring Creek

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

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

M 309 over Spring Creek in Rice 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 2004, making it 21 years old at the 2025 inventory.
It carries about 10 vehicles a day (traffic count year 2005).
Its listed owner is a city or municipal highway agency.
It is one of 58 of the 143 inventoried bridges in Rice County rated good (40.6%); 4 (2.8%) are rated poor.
Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
Its condition class and component ratings are unchanged from the 2024 inventory.
Its most recent inspection on record is dated April 2022, on a 48-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	7	7	Good condition


Structure	Concrete culvert
Length	about 26 ft
Location	In Northfield
NBI structure number	66J41
Condition class	Good
Traffic status (item 41)	Open, no restriction
Last inspection (item 90)	April 2022
Inspection interval (item 91)	48 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 35 over Heath Creek	1961	34,474	Fair
I 35 over Wolf Creek	1961	33,191	Fair
I 35 over Mud Creek	1995	31,258	Fair
I 35 over Crockers Creek	1972	25,132	Fair
Mn 3 over Cannon River	1956	19,968	Fair
I 35 over Th 19	2004	19,750	Fair