Outdoor Notes for June 21

FSA invasive species

Zebra mussels confirmed in Farm Island Lake in Aitkin County

The Minnesota Department of Natural Resources has confirmed a report of zebra mussels in Farm Island Lake in Aitkin County.

A lake property owner fishing on the lake contacted the DNR after finding an adult zebra mussel on vegetation attached to a boat anchor. The DNR sampled the vegetation and collected a plankton sample, which revealed a zebra mussel larva, or veliger. Veligers may indicate a reproducing population of zebra mussels is established in the lake.

After reports of individual zebra mussels in Farm Island Lake in 2018 and 2019, the DNR was unable to find additional zebra mussels or veligers, despite a number of follow-up searches. The DNR appreciates the vigilance of lake users who contact the agency when they find what may be invasive species not previously confirmed in a lake.

Whether or not invasive species have been confirmed in a lake, Minnesota law requires boaters and anglers to:

  • Clean watercraft and trailers of aquatic plants and prohibited invasive species.
  • Drain all water by removing drain plugs and keeping them out during transport.
  • Dispose of unwanted bait in the trash.

Some invasive species are small and difficult to see at the access. To remove or kill them, take one or more of the following precautions before moving to another waterbody:


  • Spray with high-pressure water.
  • Rinse with very hot water (120 degrees for at least two minutes or 140 degrees for at least 10 seconds).
  • Dry for at least five days.

Zebra mussels can compete with native species for food and habitat, cut the feet of swimmers, reduce the performance of boat motors, and cause expensive damage to water intake pipes.
People should contact an area DNR aquatic invasive species specialist if they think they have found zebra mussels or any other invasive species that has not already been confirmed in a lake.

More information is available on the DNR’s aquatic invasive species webpage .

DNR determines EIS not required for Nolte Family Irrigation Project

The Minnesota Department of Natural Resources has concluded that the Nolte Family Irrigation Project in Wadena County does not require preparation of an environmental impact statement (EIS). The justification for this determination is contained in a Record of Decision that followed the DNR’s completion of an environmental assessment worksheet (EAW).

Timothy Nolte proposes to convert 303 acres of formerly privately owned and managed timberland to irrigated agriculture for livestock grazing and commodity/staple crop production. The majority of the land is currently used for non-irrigated crop production and livestock grazing. The project would involve removing remaining standing timber and associated stumps, cultivating the land, and operating three groundwater-supplied center pivot irrigation systems.

In April 2019, the DNR ordered the preparation of an EAW in response to a public petition. As provided under the Minnesota Environmental Protection Act (MEPA), the DNR prepared the EAW to assess whether the project presented the potential for significant environmental effects. The analysis considered:

  • the type, extent, and reversibility of environmental effects;
  • the potential for cumulative environmental effects;
  • whether any environmental effects were subject to ongoing regulatory authority; and
  • the extent to which environmental effects can be anticipated and controlled as a result of other available environmental studies

The DNR has determined that all potential environmental effects from the proposed project are minimal in nature or can be managed through ongoing regulatory authority. Given this determination, the DNR is not ordering preparation of an EIS.
“We have found that the Nolte project does not have the potential for significant environmental effects and therefore does not warrant the preparation of an EIS,” said DNR Assistant Commissioner Jess Richards.

The proposed project is located within a larger area of the state known as the Pineland Sands. This part of the state, characterized by sandy soils, has experienced significant conversion of forested areas to other uses and an increase in agricultural irrigation, resulting in concerns about the potential for cumulative impacts to the environment. The EAW indicates that the proposed Nolte project would have a smaller zone of effect and would not influence the larger Pineland Sands area.

“The DNR remains concerned about environmental effects, specifically groundwater impacts, associated with the loss of forest lands and increased irrigation in the Pineland Sands area. We are evaluating options for addressing these concerns going forward,” said Richards.


The DNR decision followed a thorough environmental review process, including interagency coordination with Minnesota Pollution Control Agency, the Minnesota Department of Agriculture and the Minnesota Department of Health. The decision was informed by more than 150 individual public comments and results of an aquifer test.

If permitted, the proposed Nolte project would be required to implement mitigation measures to manage nitrogen fertilizer and pesticide use, and to ensure the pumping would not impact nearby wells and surface waters. The project would be regulated through multiple ongoing authorities. Mitigation measures implemented through these authorities would minimize the project’s potential to transfer nitrates and other constituents to the environment and ensure that any potential cumulative impacts would be minimal.

Under Minnesota Environmental Quality Board rules, the DNR’s decision ends the state environmental review process for the project. The project can now proceed to decisions on required permits and other approvals.

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