The Benefits of Simple Lakeshore Practices

The Anoka Conservation District (ACD) recently installed a 70-foot lakeshore restoration project to mitigate active erosion at a property on the east side of Martin Lake in northern Anoka County. This section of property is heavily used by the family and was a priority to keep intact. The shoreline had receded/eroded back, with certain areas experiencing severe undercutting caused by wave action. These vulnerable sections could lead to additional property loss in the future and contribute to pollutant loading into Martin Lake, further degrading water quality. 

As designed, this project should stabilize the shoreline and allow new vegetation to become established from existing native sources. It is estimated that the project will prevent 1.3 pounds/year of phosphorous from entering the waterbody throughout the life of the project.

Coir logs are designed entirely of natural materials that are made to biodegrade into the soil overtime. The material is inexpensive, durable, and able to be shaped uniquely to the shoreline. Coir logs can be purchased in different densities, lengths, and diameters, depending on the erosion situation. Compared to other types of erosion control practices, coir logs are low in cost and can be installed by landowners without professional guidance. These practices are also easy to maintain because landowners can fix individual sections that may be damaged over time.

Coir logs protect against wave action and allow banks to stabilize while encouraging vegetation growth. Sections of coir logs are installed in a continuous line near the bank and secured into place using wooding stakes which will also naturally degrade. Aquatics plants are commonly planted into the coir log to provide more enhancement.

This project was funded by the landowner and the ACD cost-share program. ACD provided project administration, design services, and project installation. 

  183 Hits

Bringing Adopt-a-Drain to Martin Lake

Martin Lake in Linwood Township has been classified as "impaired" since 2004, with an excess of phosphorus being a leading cause of its degradation. This particular water contaminant often comes from plant material and fertilizer, and it only takes a pound of phosphorus to create up to 500 pounds of algal growth in a lake. The subsequent two decades since 2004 have seen an array of water quality improvement projects implemented on Martin Lake's shores and in its waters. As a result, phosphorus levels have been inching closer and closer to Minnesota's water quality standard over the last few years, and a de-listing may be on the horizon if these trends persist.

Storm drains can be a significant source of leaves, grass clippings, and other pollutants to the lakes that they drain to. Luckily, Minnesota is home to the successful Adopt-a-Drain program which provides a way for people to select local drains to personally keep free of debris and protect local water sources. Up until this summer, the drains leading to Martin Lake had not been mapped and available for adoption on Adopt-a-Drain's website. 

As part of ACD's work to improve Martin Lake's water quality, we have remedied this and created a map and flyer to promote these drains to people who live in the neighborhoods along the lakeshore. Through sharing these resources with the lake association and local Facebook groups, 11 drains leading to the lake have now been adopted! Thanks to the people who have volunteered, less debris will be getting into the lake from the surrounding streets, which will help Martin Lake in its journey to getting de-listed in the future. We hope to see more people along the lake join the cause now that these drains are available for adoption!

If you're interested in supporting your local water bodies by adopting a drain, check out https://mn.adopt-a-drain.org/ to get started. 

A selection of drains along Martin Lake that are now adopted.
  156 Hits

New Grants Secured in Northeast Anoka County

This spring, long time Martin Lake residents Wally and Nancy Olson challenged the other members of their lake associations: donate $3,000 for lake water quality improvement and we'll match it. In just a few weeks $3,600 in donations poured in, including 21 households that donated $100 or more. Total funds raised was $6,600. This followed a similar challenge and response in 2020.

The funds will go into the lake association's Water Quality Fund. In the past, this money has been used for a variety of projects including rain gardens, stormwater ponds, carp management, and aquatic invasive species prevention. In nearly every case the lake association and its partners have used the funds as match for grants, multiplying their cash by 4x to 10x.

Some of the money raised by the Martin Lakers is being used as matching funds toward a new grant secured from the Anoka County Aquatic Invasive Species Prevention Program for radio tagging carp. Linwood, Typo, and Martin Lake are each receiving $3,000 for carp management from the AIS Prevention Program. The lakes are part of a chain of lakes with active carp management led by the Anoka Conservation District. Carp are being removed where they are abundant, and harmful to water quality and habitat.

Along with matching funds from the Martin Lakers, the grants were supported by $750 in matching funds from the Linwood Lake Improvement Association and Sunrise River Watershed Management Organization.

  810 Hits

Water Quality Improvements Constructed for Coon and Martin Lakes

One rain garden and two stormwater pond renovations were completed in November to treat stormwater before it reaches Martin and Coon Lakes. The projects will collectively treat 39 acres of residential development that previously were draining to the lakes with little or no treatment. They will keep 2,100 pounds of sediment and 5 pounds of phosphorus from reaching the lakes each year.

These waterbodies were priorities because both lakes are surrounded by homes and heavily used for recreation. Martin Lake is nearing the criteria for being removed from the State's list of impaired waters. Coon Lake has good water quality but is under pressure.

The rain garden was constructed in cooperation with a residential landowner along Hupp Street. Their property is a key location where drainage from 8 acres converged and entered a catch basin that piped stormwater to Coon Lake. Curb cuts on each side of the catch basin now intercept that water, allowing it to soak into the ground within the rain garden. Pollutant removal is estimated to increase by 52% compared to the pre-project condition. Mulching and planting of the gardens will be delayed until spring 2021 due to cold temperatures early in fall 2020. The property owners will maintain the garden.

The stormwater pond projects are redesigns and renovations of older ponds. Both ponds are on Martin Lakeshore within township-owned property. Both basins had filled with sediment over time and were providing little water quality treatment. Now, the basins are even larger than originally constructed to maximize pollutant removal. Pollutant removal is estimated to increase by 84% and 104%, respectively, at the two ponds. Linwood Township will own and maintain the basins.

These projects are part of a State Clean Water, Land and Legacy grant to the Sunrise River Watershed Management Organization. The Anoka Conservation District is managing the projects. Additional funds remain and will be used for similar projects in 2021.

Collaborators on these projects included the ACD, SRWMO, Martin Lakers Association, Linwood Township, and the City of East Bethel.

  906 Hits

ACD Hard at Work Removing Carp from Martin Lake

The Anoka Conservation District has been hard at work this September removing invasive carp from Martin Lake, located in northeastern Anoka County. Martin Lake has had a large carp population over the years, which can be extremely detrimental to lake water quality if left unmanaged. This type of work isn't possible without strong partnerships between natural resource professionals and residents of the community. This project and the dedicated volunteers on Martin Lake are a shining example of the level of civic engagement that is achievable when these relationships are nurtured. Thank you volunteers!

Updates are also periodically posted here: Carp Harvests

  1020 Hits