Almost all our local fishing waters are productive aquatic ecosystems, reflecting the fertile lands (watersheds) surrounding them. To maintain fish populations in shallow, soft-sediment lakes where wintertime oxygen drops to levels threatening survival (a condition known as winterkill), aeration is sometimes used to mix in atmospheric oxygen.
Aeration systems used to maintain fish populations are operated by local organizations under permit from MN DNR Section of Ecological and Water Resources. Details of the Lake Aeration Program can be found here.
Below is a list of local fishing lakes having winter aeration permits in the recent past. Other waters with aerators or fountains might also have fish populations, but are either 1) not sampled by MN DNR Fisheries 2) lacking public access, or 3) aerated for different benefits (such as to keep marinas ice-free) List Updated March 2014
Carver County Aerated Lakes/Ponds ( * public access limited and/or far from parking areas)
Courthouse (run during autumn/pre-ice), Eagle, Lucy*, Oak*, Rice Marsh*, Susan
Hennepin County Aerated Lakes/Ponds ( * public access limited and/or far from parking areas)
Bass*, Crystal, Gleason*, Hyland, Loring Park Pond, Mitchell, Penn, Powderhorn, Rebecca, Red Rock, Round, Snelling, Sweeney-Twin*, Taft, Wirth, Wolfe Park
Scott County Aerated Lakes/Ponds
Cedar, Cleary, Crystal, pond in Prior Lake Lakefront Park, McColl, McMahon (Carls), Murphy, O'Dowd, Thole
Specifics for each lake's aerator type and operator can be found in the Aeration Permit Annual Report documents (such as the 2012-13 Report [Local aerator information is in Table 6 and Appendix 2.])
Notes about Aeration Systems / Aerated Waters: