Dennis Magnuson Farm - Sec 23 - Feedlot Permit

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We invite you to comment on the draft permit for the Dennis Magnuson Farm - Sec 23 animal feedlot located in Freeborn County.

The facility will house 8,350 head of swine in total confinement barns. Liquid manure generated by the animals will be stored within concrete lined storage structures. Manure generated at the facility will be applied to surrounding cropland at agronomic rates. The final animal unit (AU) capacity of the facility will remain unchanged at 2,505 AU.

This permitting action includes previously approved construction of animal holding areas and liquid manure storage areas at the facility.

The preliminary determination to issue coverage is tentative

This permit requires the facility to be designed, operated, and maintained to prevent discharge to waters, except in an extreme storm event. Operators are required to land apply manure at agronomic rates, observe water setbacks, and maintain records of land application activities, including location, timing, and rate of application. Please refer to the draft permit for additional requirements.

The MPCA’s feedlot permit strives to protect our lakes, rivers, streams, wetlands, and groundwater by preventing manure from polluting water. The permit applies to most aspects of livestock management including the location, design, construction, operation, and management of feedlots and manure handling facilities. Minnesota has approximately 18,000 registered livestock operations.



We invite you to comment on the draft permit for the Dennis Magnuson Farm - Sec 23 animal feedlot located in Freeborn County.

The facility will house 8,350 head of swine in total confinement barns. Liquid manure generated by the animals will be stored within concrete lined storage structures. Manure generated at the facility will be applied to surrounding cropland at agronomic rates. The final animal unit (AU) capacity of the facility will remain unchanged at 2,505 AU.

This permitting action includes previously approved construction of animal holding areas and liquid manure storage areas at the facility.

The preliminary determination to issue coverage is tentative

This permit requires the facility to be designed, operated, and maintained to prevent discharge to waters, except in an extreme storm event. Operators are required to land apply manure at agronomic rates, observe water setbacks, and maintain records of land application activities, including location, timing, and rate of application. Please refer to the draft permit for additional requirements.

The MPCA’s feedlot permit strives to protect our lakes, rivers, streams, wetlands, and groundwater by preventing manure from polluting water. The permit applies to most aspects of livestock management including the location, design, construction, operation, and management of feedlots and manure handling facilities. Minnesota has approximately 18,000 registered livestock operations.



Page published: 13 Oct 2026, 10:49 AM