As summer warms up, the likelihood of harmful algae blooms increases. Cyanobacteria, also known as blue-green algae, are a type of photosynthetic bacteria. Cyanobacteria are naturally found in all lakes, rivers, and ponds, and, like plants and algae, they perform photosynthesis, obtaining their energy from the sun. Unlike true algae, cyanobacteria aren't a key part of the food chain, and most organisms choose not to eat them. Under the right circumstances, cyanobacteria can multiply to form a bloom. A bloom is a sudden increase in cyanobacterial cells in a specific area of water. Some species of cyanobacteria can create toxins that are harmful to human and animal health, known as cyanobacterial harmful algal blooms (cyanoHABs). 

CyanoHABs can make people and animals sick if they breathe in, swallow, or come into contact with water or scum that contains toxins. Sunlight, high temperatures, and abundant nutrients, such as phosphorus and nitrogen, can increase the likelihood of a bloom occurring. Warm weather patterns and significant rain events that result in more stormwater runoff entering the water can also jump-start a bloom. Blooms typically occur during the warmer months, between mid-June and mid-September. As Minnesota's climate changes, it's fueling more frequent and intense rain events, floods, and warmer weather, contributing to more harmful algal blooms. For more information, check out the Minnesota Pollution Control Agency webpage or contact Kris Larson, Water Resource Specialist, at This email address is being protected from spambots. You need JavaScript enabled to view it.. 

Mussels, often referred to as clams, can be found in many lakes and rivers in Minnesota. Of the 51 freshwater mussel species that have historically lived in Minnesota, 28 are now gone, endangered, threatened, or of special concern. None of them are legal to catch or relocate. If a rare mussel has been identified in an area of a lake or river where a project is proposed, the permit process grinds to a halt. At the same time, experts with specialized certifications are called in, equipped with scuba gear, to carefully locate and relocate mussels from the construction zone. Few people have the necessary expertise and it can take a long time to get one to a job site. The not-so-rare mussels are left to fend for themselves.

All of this intersects with the Anoka Conservation District's (ACD) services, as we often help property owners on lakes and rivers address excessive erosion. Left unchecked, bank erosion can impair water quality, smother wildlife, and damage property and infrastructure. We've been fortunate to avoid all identified rare mussel populations and the permitting challenges that come with them. We started thinking about what would happen if our luck runs out and asked ourselves, "What if we could come up with a way to safely relocate all mussels from all construction zones without hiring Scuba Steve?" We may have come up with a solution that contractors could implement with readily available equipment at a reasonable cost, but first, there are some things you should know about mussels.

Mussels are interesting creatures. When they're born, they must immediately latch onto the gills of a fish, where they live rent-free until they are large enough to drop off and sink into the sand. Each mussel species can only pair up with a specific fish species. Some mussels live over 100 years and most of that time is spent in the top 4 inches of sand and gravel in lakes and rivers. Most mussels prefer to hide in river or lake bottoms with only their mouths sticking out of the sand. Mussels eat by siphoning water and filter out microscopic organisms and plant material that are floating by. They are like HEPA filters, purifying our water bodies. While mussels can move several feet a day to escape dropping water levels, they often spend their entire lives within an area smaller than a kitchen table. They are fairly helpless, except that some local species have such hard and sharp shells that they earned the name heel-splitter, yikes!

We explored numerous ideas before settling on one that we believe has promise. Those left on the cutting room floor included:

• doing nothing because then all of the mussels would die;
• excavating out the soil in the construction zone because the mussels would likely be crushed and die;
• using a rake or sieve because only large mussels could be extracted and the rest would be left to die; and
• hydro-excavation using an impeller because it's difficult to control and needs an electrical power supply, which near water would set up the operator potentially to die.

All of those options simply involved too much dying. So, we landed on using hydro-excavation, using a high-pressure water pump to blow the top 4" of sand and gravel out into the water and out of the construction zone. 

ACD has been out in the field, monitoring the water quality and water quantity of Anoka County's streams and rivers. Stream water quality monitoring is conducted to detect and diagnose water quality problems that impact the ecological integrity of waterways, recreation, and human health. Since many streams systems are connected to lakes, water quality in streams is often studied as part of lake management. Hydrology is the study of water quantity and movement. Knowledge regarding the amount of water flowing in a stream helps engineers and natural resource professionals understand the effects of rain events, land development, and stormwater management. This information is often paired with water quality monitoring and used to calculate pollutant loadings, which are used in computer models and water pollution regulatory determinations.

Flowing water eats away at the soil on the lower bank along the outside curves of rivers. The water is piled against the outside of the curve as the river bends, similar to the sensation of being pushed to the outside of a fast-turning car. This flowing water scours material away, causing the bank to collapse. A common and effective method of preventing erosion is to armor the bank with a robust layer of material that cannot easily be moved or washed away by the current, such as rock. This results in a bank armored against erosion, but it does not allow vegetation to flourish on the part of the bank covered in rock. It also doesn't help dissipate the energy of that flowing water, which can then be exacerbated downstream. It often requires the entire armored length to be clear-cut and graded. 

An alternative to armoring is to redirect the river's flow from the outer bank, thereby preventing scour through deflection. An effective way to do this is to angle rock barbs or weirs upstream into the channel. This forces the water to flow around and over at a perpendicular angle. This pushes the main flow back towards the center of the stream rather than along the outer bank. Often, a deep pool is made just off the end of the weir towards the center of the channel. This causes variable flows and depths within the channel that fish and other organisms like. ACD has recently implemented bendway weirs and plans to install more in the near future. For more information contact Jared Wagner, Water Resource Specialist, at This email address is being protected from spambots. You need JavaScript enabled to view it.

Thanks to the Volunteers, Conservation Corps, and Three Rivers Park District staff for joining the ASP Rare Plant Rescue team to rescue state threatened Viola lanceolata, state Endangered Carex pallascens, and state Threatened Trichophorum clintonii from an area that will be dug up and developed soon. Those plants will temporarily grow at the MN Landscape Arboretum during the hot summer. In the fall, we will plant them into ecologically appropriate habitats on protected lands where they will be monitored.

Stay tuned for a volunteer planting event in the fall. Sign up to be added to the Volunteer List. Learn more about the ASP Rare Plant Rescue. For more information, contact Carrie Taylor, Restoration Ecologist, at This email address is being protected from spambots. You need JavaScript enabled to view it. 

Vernal pools are shallow wetlands that fill with water in the spring and fall, then often dry out in the summer. They may appear like large puddles, but these depressions are brimming with life and help improve water quality. By capturing water from snowmelt and heavy rainfall, vernal pools reduce the amount of runoff (and therefore the contaminants it carries) reaching nearby surface waters and developed lands. This lowers flooding risks, improves water quality, and contributes to groundwater recharge as the trapped water slowly infiltrates through the soil. 

Vernal pools rarely contain fish because their water levels fluctuate dramatically. This creates a safe haven for many amphibians and aquatic invertebrates that would otherwise be heavily preyed upon. While some depend on vernal pools during only their vulnerable egg and larval stages, others spend their entire life within or near them. These small wetlands also provide food, water, and refuge for many other wildlife species such as ducks, turtles, and snakes. Benefits stem beyond the pool itself as several aquatic insect larvae transform to flying adults, serving as forage for insectivores like songbirds and bats.

Vernal pools are highly sensitive to environmental changes. Because they are nearly invisible for much of the summer, they can be easily missed and destroyed if the land is modified. You can help protect vernal pools on your property by noting their boundaries when visible in the spring and avoiding disturbance throughout the year. This is also a great time to explore the abundance of wildlife in and around these wetlands! For more information contact Breanna Keith, Water Resource Specialist, at This email address is being protected from spambots. You need JavaScript enabled to view it.

Additional Resources
"Spring-to-Life Ponds": an Illustrated Learning Guide, produced by the MNDNR
MN Frog ID and Calls and Common Vernal Pool Invertebrates, produced by the MPCA and the University of Wisconsin
Locating and Protecting Vernal Pools, produced by the MN Land Trust

ACD has secured over $78,000 - including $71,000 in state Watershed-Based Implementation Funds and $7,100 in local matching funds from the City of Fridley - to revitalize aging rain gardens in the Coon Creek Watershed.

Many rain gardens are now beyond their original 10-year lifespan, yet still hold potential for managing urban stormwater runoff. This project will remove accumulated sediment, repair infrastructure, and improve plantings within up to 10 rain gardens. The work will increase the rain gardens' ability to capture and filter pollutants from stormwater runoff, thereby reducing phosphorus by an estimated 5.2 pounds annually for the next decade. 

Designs have been completed and construction planning is underway for nine shoreline restorations on Martin, Coon, and Linwood lakes in Anoka County. Sites were selected based on the severity of erosion, and therefore the amount of nutrients and sediment they're contributing to the lake. A variety of 'bioengineering' approaches will be applied, utilizing natural materials such as vegetation, wood, coir logs, and rock to stabilize the shoreline while enhancing habitat for fish and wildlife. Funding is provided by a Clean Water Fund grant, the Sunrise River Watershed Management Organization, and landowner match. Stay tuned for more updates! For more information contact Breanna Keith, Water Resource Specialist, at This email address is being protected from spambots. You need JavaScript enabled to view it. 

The 2026 budget request to Anoka County includes adding a Groundwater Specialist to ACD's staff. This is the third consecutive year that this need has emerged as a top priority. Anoka County has never had a professional dedicated solely to managing our groundwater. Given our situation, it's time to shift our priorities. What situation?  

• 94% of us in Anoka County rely on groundwater for drinking and other needs
• We have more private wells than any other county in MN (53,000)
• We have more Superfunds sites than any other county in MN (9)
• We sit on the Anoka Sandplain, making our drinking water highly vulnerable to contamination
• Our shallow groundwater recharges aquifers relied on throughout the Metro Area. 

If only we had a Groundwater Specialist at ACD, we could:

• Develop a groundwater management plan and secure state approval,
• Secure $150K-$350K/year in state funds available to those with approved groundwater plans,
• Use advanced technology for high-resolution groundwater modeling,
• Analyze neglected datasets for hotspots and trends in groundwater degradation,
• Engage MPCA, MNDNR, and MDH to enhance the service Anoka County constituents receive,
• Coordinate regional planning, wellhead protection, and contamination response,
• Implement sentinel well monitoring,
• Manage cost-share programs for projects like septic upgrades, well sealing, and agricultural irrigation technology upgrades,
• Inform civic leaders, public employees and the public at large on groundwater, and
• Serve as the trusted expert on groundwater issues.

If groundwater is a mystery to you, please watch the short videos linked below, which were made locally and are often referenced nationally. 

Groundwater - https://www.youtube.com/watch?v=gxENTkMmyEE

Groundwater Contamination - https://www.youtube.com/watch?v=gRSHJpe8pq8&t=12s 

The Harder Path is the Right Path

As is often the case, the more convenient approach — using neonicotinoids and other chemicals on a widespread basis in anticipation of pest problems — is seductive but ultimately harmful in the long term. Damage to pollinators, faster evolution of resistant pests and replacement of natural processes with chemicals are all costs that eventually have to be faced. The IPM approach requires more work and acceptance of a certain amount of pest damage. We must reduce and manage the use of neonicotinoids and other agricultural chemicals, as their long-term impact will be far more harmful than beneficial. Do it for the bees. Do it for the butterflies. Do it for the birds. Do it for you.

An excellent resource for more information is the University of Michigan's website: https://ncipmhort.cfans.umn.edu/ipm-bmp-cultural-control/vegetable-garden-best-management-practices-pollinators.

Spring is the perfect time to upgrade your lawn irrigation system. Smart irrigation tools—such as Wi-Fi-enabled controllers, soil moisture sensors, and rain sensors—help your system adjust automatically based on weather and soil conditions. These upgrades take the guesswork out of watering and prevent overwatering. 

Thanks to the Metropolitan Council's Water Efficiency Grant Program, funded by the Clean Water, Land, and Legacy Amendment, several Anoka County cities are offering rebates for smart irrigation controllers that reduce water waste and lower your water bill. Click the links below or check with your city to learn more about eligibility and how to apply.

- Smart irrigation controller rebates: Centerville, Coon Rapids, Fridley, Lino Lakes, Ramsey
- Irrigation audits to assess water efficiency: Fridley

Smart irrigation is a simple, effective step toward more resilient water resources—right here in Anoka County. Visit the University of Minnesota Extension's Lawn Care website for additional lawn management resources. For more information contact Mitch Haustein, Stormwater and Shoreland Specialist, at This email address is being protected from spambots. You need JavaScript enabled to view it.. 

ACD is seeking a group, company, or individual to provide $1,000 per year in support for the St. Francis High School biomonitoring program. Our past sponsor has had to withdraw due to financial constraints. Each year, we take high school biology classes to the Rum River to catch and count macroinvertebrates (bugs, crustaceans, etc.) that live there. Because some of these critters require high-quality conditions, we can use them to calculate metrics of river health. It's hands-on education led by professionals, with implications beyond the classroom. This program has been going since 2001. 1,950 students (average 81/yr) have donned waders, grabbed a net, and learned about the Rum River.

Financial assistance is used to help cover the costs of waders, nets, and other necessary equipment. It also ensures that our natural resource professionals can provide instruction and help students discover what their data means. Any group willing to provide financial assistance can please contact This email address is being protected from spambots. You need JavaScript enabled to view it..