Forest Lake Lake Association




MISSION: Founded in 2007 as a non-profit organization [501c(3)], the mission of the Forest Lake Lake Association is to build an expanding, sustainable entity of caring individuals to Promote, Protect, Improve, and Conserve the natural resource that is Forest Lake for future generations.


Key Lake Issues /Threats:


1.  Curly Leaf Pondweed(CLP). This invasive plant species grows  rapidly to form a dense mat- like structure at the surface that chokes out desirable native plant species and restricts  recreational  boating and swimming. CLP dies at the end of June/early July and floats to shore causing disposal problems. The decaying CLP releases   2-5 pounds of phosphorus/acre, thus supporting severe algae blooms and low water clarity.


2.  Zebra Mussels. This invasive species rapidly  propagates  taking over lakes, killing other mollusks, and attaching to boat motors/bottoms, docks, lifts and any hard surface in or near the water. Frequent removal of the ZMs is required to maintain equipment functionality. The razor sharp shells of dead ZMs  eventually  cover the bottom and  prevent swimming/wadding without adequate foot protection. Because the thin dead shells can be blown by wind and storms, they can  collect  in heaps and piles, which could block not only the  shallow channels  connecting our three lakes  but also  entrances to  bays/channels.


3.  Starry Stonewort  (Nitellopsis obtusa). Starry stonewort is a bushy, bright green macro-algae. It produces a characteristic star-shaped bulbil. It's thin, bright green branchlets (branch-like structures) can be variable in length and are arranged in whorls (radiating out from a single point) around the stem. Branchlets typically extend in acute angles away from the stem nodes. Tips of the branchlets may have irregularly-lengthed forks or divisions. It produces clear, root-like filaments that anchor it to the sediment.

Starry stonewort is a macro-algae, meaning it does not have a vascular system like true plants. Each branchlet or stem is a single cell. Native populations consist of both males and females, but all known introduced populations in North America are male. Bulbils are present throughout the growing season, but become most obvious and plentiful in late summer. Starry stonewort may form a dense carpet of material in shallow areas.

Don't be fooled by these look-alikes... It looks similar to many native, beneficial grass-like algae, such as other stoneworts and muskgrasses found in Minnesota lakes and rivers, but can be distinguished based on its production of star-shaped bulbils.



4. Phosphorus Contamination from Storm Water Runoff. Untreated storm water runoff (yards, streets, storm sewers, ditches, culverts, etc) deposits 2100 lbs of phosphorus /year into Forest Lake. This is NOT fertilizer phosphorus. The phosphorus comes  from decayed grass/leaves/vegetation  and sediment. It can come miles from the lake and needs to be controlled by shoreline plants, rain gardens, settling ponds and  4-5 other techniques depending on the situation/location where it flows into the lake.  This phosphorus and phosphorus build up supports algae blooms/low water clarity. One pound of phosphorus can support 500 lbs of algae! This is why Forest Lake is categorized as “eutrophic” and rated as “impaired” in about half of our open water months.


5. Invasive Species NEW to Forest Lake: Purple Loosestrife and  Flowering Rush.





Membership:  Membership dues fund projects, programs and help us communicate with our members and the community regarding lake issues.  Anyone interested in the lake is welcome to join.  Membership dues are: $50 Standard, and $200 Corporate.


To become a member or renew your membership,


CLICK HERE to Print a mail-in form


 or CLICK HERE to register Online


Forest Lake - Lake Association  •  P.O. Box 61 Forest Lake, MN 55025