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Secchi Disk Readings Weed Control


Lake Martha Improvement Association has worked hard over the years to address remedies for problems that affect lakes our size.

Lakeshore Erosion & Phosphours Levels are concerns. Curlyleaf pondweed is an exotic plant that had grown to nuisance conditions in our lake. When curlyleaf dies back in early summer, phosphorus is released from the decaying plant matter and contributes to algae blooms. So what has our Association done to minimize erosion and nuisance curlyleaf conditions that impact on our waters? Projects to physically remove Aquatic Invasive Plants and Creatures have been undertaken to improve water conditions.

1980's: We started by purchasing 1 Weed Cutting & 2 Rake Boats to physically cut & remove curlyleaf in front of each members' property. We abandoned using the Cutter and Rake Boats after 20 years of increasing problems maintaining the equipment. Since that time some individuals have been treating their shorelines using spraying methods.

1987-89: Another of our early Projects was to address shoreline erosion, the "Digging & Damming Era" problems. "In 1989 the Martha & Charlotte Associations got together to finally attempt to resolve the problem. They shared the expense of constructing a permanent concrete arch culvert at the Martha outlet. This was at an elevation of 968.1 MSL(mean sea level) as prescribed by the State Department of Natural Resources. This settled the problem no more Digging and Damming Era. Jeff Kennedy & Frank Forsberg were Association Leaders that were instrumental for completion of this project.

2000(LateFall) & 2001(EarlySpring): By evaluating the relationship between curlyleaf growth and lake sediment characteristics, it was found that lakes with naturally high sediment iron concentrations had low curlyleaf densities. So our association (First in MN) with guidance from DNR & "Clear Water Technologies" drilled thousands of holes through the ice and treating our lake sediments with many tons of Magnetite to help "tie up" the phosphates that had accumulated in the bottom sediments over the years.

2001: Our Lake along with Lake Charlotte and Beebe completed the (CMSSD) project to replace individual septic systems with "City Sewer" to comply with county and state regulations.

2012: Wright Soil and Water Conservation District in conjunction with the University of Minnesota St. Anthony Falls Laboratory installed the "Minnesota Filter".   This removes approximately 12 pounds (as much as 80%) of phosphorus annually, from one part of our agricultural watershed runoff, before entering Martha's waters.

2019: We added and continue to fund operation of 3 aeration units. These units help the health of fish and other beneficial organisms aiding natural processes for the lake health, water quality and clarity.

2021-2023: Each of these years our Association has voted in favor of a "whole lake" (about 11 Acres) approach to treating the invasive curly leaf, with encouragement and direction from the DNR. Curlyleaf was once under better control, but we had never attacked some larger patches of invasive curlyleaf, and has continued overpowering and choking out the more beneficial natural weeds, causing deterioration of our lake bottom and water clarity. The Association will continue yearly assessment and direction from the DNR with plans to use the services of "Aquatic Solutions" to purchase and apply the product needed to target this invasive species.

Our Association seeks to raise enough money each year, as needed and approved, to fund this continuing project.

If you are one of the 47 Lake Shore owners or Association Member click on this Link.


1987-89 Lake Outlet Culvert Project Info

1998-2001 Sewer District Project

"2012 Minnesota Sand Filter"

2015 Aquatic Plant Community of Lake Martha

2019 Lake Martha 3-diffuser DYI Aeration System proposal

2020 Late-Spring Curlyleaf Pondweed Delineation

2021 First "Whole Lake" Curlyleaf Pondweed Treatment


Another Lake Iron Treatment Study


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