St Croix Flowage Critical Habitat Designation

St Croix Flowage Critical Habitat Designation This is a summary of the St Croix Flowage Critical Habitat Designation Reort, prepared by Alex Smith, Northern Region Critical Habitat Coordinator for the DNR. An increase in shoreline development over the past 30 years has changed lake ecosystems affecting habitat and water quality. The Critical Habitat Designation program includes formal designations of areas considered important to fish and wildlife.

There are three categories:

  • sensitive areas
  • public rights features
  • resource protection areas

The designations serve four primary purposes:

  1. Resource protection through science based regulatory review.
  2. Community-based resource protection through community education, planning, and zoning.
  3. A guide to land trusts and individuals acquiring land and conservation easements.
  4. A mechanism to track long-term changes in these habitats.

General Lakewide Recommendations
Permanent Land Protection. Tools include: land acquisition, conservatin easements, and mutual covenants. Much of the Flowage is already in County ownership.

Shoreland Restoration. Leave natural shorelines undisturbed in accordance with local shoreland zoning rules. If the shoreline buffer does not exist or is disturbed, it should be replanted with native vegetation.

Runoff Control. Tools include rainwater gardens, rain barrels, infiltration pits and trenches, grass swales.

Septic Systems. Inspect and maintain septic systems to prevent excess nutrient addition while protecting present water quality conditions.

In-Lake Habitat Protection. The Flowage contains many areas where boat traffic is directed to protect safety and habitat. In general, native aquatic plants should not be actively managed (no raking, herbicide use, or mechanized removal), and will require a permit for manual removal and chemical control.

Specific Lakewide Recommendations
Management actions recommended for all of the St Croix Flowage include protecting Ceratophyllum echinatum (Spiny hornwort), a rare aquatic plant species found throughout the Flowage. Continue to aggressively manage the isolated Eurasian water milfoil population and monitor other aquatic invasive species.

Specific Site Recommendations
Management actions are specific to the site ans supersede general lakewide recommendations if explicitly stated. One area on the St Croix Flowage is designated as Critical Habitat for a total of 3596 acres (see Tables 1 and 2).

Tables 1 and 2

It is classified as Sensitive Areas for submerged aquatic plants, rushes, emergent and floating leaf aquatic plants, and extensive reparian wetlands. St Croix Flowage Critical Habitat Area 1 The St Croix Flowage Critical Habitat Area is designated a Sensitive Area because of its Submerged Aquatic Vegetation Important to Fish and Wildlife Habitat, Emergent and Floating Leaf Vegetation, Bulrush Beds, and Extensive Riparian Wetland. It is 3596 acres in size which includes most of the Flowage and the extensive riparian wetland areas that adjoin the Flowage (see map below).

St Croix Flowage critical habitat areas

Management RecommendationsDo not actively manage aquatic plants with the exception of continued control of Eurasian Water Milfoil. Monitor curlyleaf pondweed. Continue watercraft inspection projects at public landings to ensure AIS are not transferred into or from the Flowage. Buffers and overhanging vegetation, bog fringe and floating, emergent and submersed aquatic plants should be left alone. Do not remove rush beds. Place piers outside of rushes, or where possible, extend thepiers beyond the rushes for boat mooring. Extensive wild rice beds are located in this area and because of their importance as wildlife habitat and seasonal use by several fish species should be left undisturbed. Table 3 shows the inventory of aquatic plants in the St Croix Flowage Critical Habitat Area.

Table 3

About Jean

Jean Hedren, Your Northwest Wisconsin Realtor. Specializing in up-north lake homes, cabins, and waterfront real estate. Serving the real estate needs of northern Wisconsin buyers and sellers in Barnes, Solon Springs, Lake Nebagamon, Gordon, Wascott, Minong, Trego, Spooner, Hayward, Webb Lake, and beyond. I’ll be glad to help you find the lake place that’s right for you; some of my favorite NW WI lakes include the Eau Claire Chain of Lakes, Nelson Lake, Lake Minnesuing, Lake Nebagamon, Upper Saint Croix Lake, Whitefish Lake, the Minong Flowage, Gilmore Lake, Kimball Lake, Nancy Lake, Bond Lake, Leader Lake, Big Bass Lake, the McKenzie Lakes, Horseshoe Lake, and Webb Lake. To learn more about the cabins and lake homes for sale in northwest Wisconsin or if you are thinking of selling, give me a call at 218-590-6634. Or, you can reach me at
This entry was posted in Links, Wisconsin lakes and tagged , , , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s