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Flowering Rush

Aquatic Invasive Species

Aquatic Invasive Species (AIS) are non-native plants or animals that are introduced into the region, usually by humans.  They can cause extensive environmental damage to the lake by replacing the species that are needed by the native fish and wildlife. The species that have been found in Big Sandy Lake are Flowering Rush,  Purple Loosestrife, and Chinese Mystery Snails.  Big Sandy is rated high risk, but careful boating practices can prevent the spread of AIS.  Click on the images below for larger views. 

Chinese Mystery Snail

Purple Loosestrife

To Report a Possible Infestation

If you suspect a new infestation of an aquatic plant or animal, note the exact location (GPS coordinates if available), take a photo or keep a sample, and contact the region AIS specialist:

Richard Rezanka 218-328-8821 or at


Decontaminate your boat, dock, or lift when moving between different bodies of water.  Aitkin County currently covers the cost of this service so there's no cost to customers. 

Decontamination Service Providers

US Army Corps of Engineers Dam:

22205 531St LN, McGregor, MN 55760

Willey's Marine: 46054 State Hwy. 65,

McGregor, MN 55760  218-426-4350 

Farm Island Repair & Marine:  

28965 Hwy 169 So,

Aitkin, MN 56431  218-927-6395

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