Aquatic invasive species prevention

Hennepin County receives funding from the State of Minnesota to manage the spread of aquatic invasive species (AIS), such as zebra mussels, Eurasian watermilfoil, carp and other species.

Subscribe to the Aquatic Invasive Species early detection volunteer newsletter to receive updates about AIS in the county, invitations to trainings, and other updates.

2023 AIS prevention program accomplishments report (PDF)

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AIS prevention grants

Grant information

Grants are currently open for applications.

View a flyer about the grant program (PDF).

Eligible recipients

Eligible recipients include:

Local government agencies, such as cities, watershed organizations and park districts
Nonprofit organizations
Public companies and institutions
Private, for-profit companies

Eligible project activities

Eligible project activities include:

Early detection
Pathway analysis
Education
Decontamination
Water access re-design
Research
Management
Other ideas that prevent the introduction or limit the spread of AIS

Funding available

Typical project awards will range from $5,000 to $25,000, with a maximum project award of $50,000. No match required.

Eligible expenses include consulting fees, staff time, materials, supplies, labor, printing and promotions.

Apply

Applications are due by 3 p.m. on Tuesday, January 14, 2025.

To access the RFP and apply once the grants are open for applications:

Visit the Supplier Portal.
Under Contracting opportunities, view the application materials by selecting Aquatic Invasive Species (AIS) Prevention Grants.
You need to be registered to submit an application. There has been an upgrade to the Supplier Portal, so all respondents will need to register or re-register. For detailed instructions on how to register and submit an application, including video tutorials and more, visit the Supplier Portal information page.

Contact

Staff is available to answer questions, offer resources and provide feedback on project ideas.

For more information, contact Tony Brough at tony.brough@hennepin.us or 612-348-4378.

Grants awarded 2024

Bassett Creek Watershed Management Commission

$13,680 to conduct a water milfoil eradication project on Sweeney Lake. Milfoil was identified for the first time in the Fall of 2023 on Sweeney Lake in Golden Valley. This project aims to survey and eradicate milfoil before it becomes an established population. Barr Engineering and a certified herbicide contractor will be utilized to oversee the survey, planning, and treatments. The Sweeney Lake Association will assist with homeowner education including a workshop and promotion of Lakepledge.com. Work categories include rapid response, early detection, and education

Bolton & Menk, Inc. (two projects)

$17,950 to conduct AIS survey training, technical assistance, and early prevention. The project will provide early detection and prevention by empowering lake groups and citizens to conduct their own lake surveys through training with a professional limnologist. This grant also assists with the county AIS newsletters and other technical requests throughout the season. New this year will be an opportunity for lake groups countywide to collect a bucket of plants, snails, or crayfish from their lake for identification by an AIS professional. Work categories include early detection, education, and research.

$18,348 for a project to educate youth about the risks related to releasing pets and plants. This project proposes to initiate an AIS awareness program targeting 4th and 5th grade students about the risk from pets and plants being released into our lakes. This is an often-under-addressed pathway for AIS. Working with Robbinsdale School of Engineering and Arts, a 10-minute video will be created and made available countywide. Work categories include education, early detection, and pathway analysis.

Fish Lake Area Residents Association

$7,000 to conduct AIS inspections and application. Fish Lake Area Residents Association will work with the Three Rivers Park District to provide watercraft inspections at the Fish Lake public access during periods when there is minimal coverage in May and September. This project will provide enough inspection hours to cover the majority of watercraft using this access in 2024. This project will also provide education about how to use a CD3 station to assist outgoing watercraft. Zebra mussels were identified in Fish Lake in 2022. Work categories include watercraft inspection and education.

Friends of the Mississippi River

$15,410 to educate youth about invasive carp and conduct public outreach. This project is part of the Friends of the Mississippi River Environmental Stewardship Institute, a youth development program that offers education and career exploration a diverse next generation of environmental leaders. Project participants will raise public awareness about the threat of invasive species and the importance of limiting the spread of invasive carp. Between 400 and 500 community members will be engaged and the primary work category is education.

Lake Minnetonka Association

$7,000 to conduct AIS surveys around water accesses on Lake Minnetonka. The Lake Minnetonka Association will contract with PLM Services to survey a two-acre or larger area around each of the 16 public and private water accesses on Lake Minnetonka, focusing on the identification of starry stonewort. Work categories include early detection and education.

Minneapolis Park and Recreation Board

$15,000 to upgrade an AIS education kiosk and check station at Bde Maka Ska. This project will upgrade the AIS informational kiosk at Bde Maka Ska boat launch. Using lessons learned over a decade, the kiosk will be designed to enhance the engagement and education of AIS prevention. This is a popular lake for sailing, fishing, recreational boating, and pedestrian traffic expecting 2,500 inspections and engaging 5,500 patrons annually. Work categories include access redesign and education.

WaterGuards LLC

$23,400 to provide inspection services and conduct an AIS educational encouragement program. This is a watercraft inspection program spread throughout the county that also focuses on education and encouraging boaters to take the right actions to prevent the spread of AIS. These inspections will be conducted from fishing opener to Labor Day. Lakes, and inspection hours at those lakes, will be randomly scheduled at accesses without an inspection program or at times inspectors would typically not be present. Work categories include watercraft inspection and education.

Waterfront Restoration

$30,000 for an AIS Ambassador education program. This project will provide Watercraft Ambassadors at five public water accesses at high risk for the spread of AIS. The Ambassadors will educate and teach boaters with all interactions focusing on obtaining correct boater self-inspection. This is an expansion from the success observed the last two seasons, where violation rates dropped by 83% and boater’s self-inspections increased by 81%. Work categories include education and research.

Wildlife Forever

$11,000 to conduct targeted outreach and education about Clean Drain Dry. This project will join the nationwide Clean Drain Dry initiative and the Minnetonka Power Squadron on Lake Minnetonka. Signage, posters, graphics, and other materials will be distributed at the Power Squadron Headquarters and website along with local events including the Minneapolis Aquatennial, MN Wakesurf Championship, and Spirit of the Lakes fireworks and parade. Work category is education.

Take the pledge to prevent AIS

Celebrate all the activities we enjoy in and around Hennepin County lakes while protecting them from aquatic invasive species (AIS). AIS can cause irreparable damage to native fish and plant populations an affect our health, recreation, property values, and the economy.

Join Lake Pledge to learn what you can do to help prevent the spread of AIS in Hennepin County lakes.

The program:

Is family friendly
Will help you learn how activities may unintentionally introduce AIS
Includes short entertaining videos showing Hennepin County lake users taking action to prevent AIS
Takes just minutes each week to participate

Join Lake Pledge today

On a computer: lakepledge.com
On a mobile device: download the Lake Pledge app on Apple’s App Store or Google Play

When you register: select the Hennepin County lake you use most often. When prompted to select the ways that you enjoy time on the water (sailing, fishing, kayaking, etc.) choose everything that applies to any lake in the county.

Pet store and garden center AIS prevention

Aquatic Invasive Species (AIS) infestations can occur as a result of the accidental release of water garden plants and animals. Introducing animals and plants from your business into the ecosystems in Minnesota can cause harm to our lakes, streams and wetlands.

The following training and resources will teach you how pet stores and garden centers can introduce AIS and what staff can do to prevent it. Join pet stores and garden centers by committing to protect Minnesota waters from AIS.

Take a short training

Watch this four-minute video training and take the short quiz to earn your AIS prevention course certificate of completion. This video is intended for store owners, managers, and staff at garden centers and pet stores.

Take the quiz and pledge to prevent the spread of AIS. You will receive a certificate upon completion.

AIS disposal guidelines

Garden center and nursery disposal guidelines for water garden plants and animals

Print these guidelines (PDF).

Inspect and rinse new water garden plants to rid them of seeds, plant fragments, snails and small animals. Rinse into sink, on a vegetated area, or into container where water can’t drain to storm sewers. Strain out any sediment, plant fragments and small animals and seal in a plastic bag, freeze for 24 hours and dispose of in the trash.
Make sure that display water gardens are isolated from natural waterways, wetlands and areas that flood.
Drain water in the sink through a strainer or on dry land where water can’t flow to storm drains, ditches, wetlands, streams, or other surface waters when cleaning or emptying display water gardens and aquatic plant containers.
Over-winter plants for next season if possible.
Freeze unwanted plants for 24 hours in a sealed plastic bag, or heat in a microwave and then dispose in trash. Composting should be avoided, as seeds and fragments may still grow.
Dispose of nonviable prohibited invasive species and aquatic plants at a legal site at least 300 feet from any water body or seasonally flooded land.
Provide information to your customers on proper disposal of unwanted plants.

Pet store disposal guidelines for aquatic plants and animals

Print these guidelines (PDF).

Filter out plant fragments, snails, eggs or other small living species from aquarium water using a strainer or small mesh net before disposing of water down the drain.
Prevent plants and plant parts, seeds, animals and aquarium or rinse water, from reaching storm drains.
Inspect and rinse new aquatic plants into a sink with a strainer, to rid them of seeds, fragments, snails and fish.
Freeze unwanted plants for 24 hours in a plastic bag, or heat in a microwave and then place in the trash. Composting should be avoided, as seeds and fragments may still grow.
Make sure plants and animals cannot escape or are not released into the environment.
Provide information to your customers on proper disposal of unwanted plants and animals.
Follow guidelines for humanely euthanizing unwanted live fish and animals. Guidelines are available through the American Veterinary Medical Association. Disposal of live organisms should be considered as the last resort.

Resources for pet and garden stores

Print and post these resources in your store or workplace for employee reference.

Sign up for the Responsible Buyers email list from the Minnesota Department of Natural Resources to stay up to date on new information.

Reference materials

Trade pathways for invasive species. Information from the Minnesota DNR on AIS specific to pet stores, the horticultural industry, and other businesses.
Prohibited and regulated invasive species list. The most up-to-date list of prohibited and regulated invasive species and invasive species laws from the Minnesota DNR.
Invasive species information sheets from the Midwest Invasive Species Information Network.
Auctions and take-back programs from the Minnesota Aquarium Society.
Goldfish and Koi rescue and sales events from the Minnesota Water Garden Society

Public water access redesign

Public accesses redesign for improved AIS compliance rates

In 2012, the county piloted a project to re-design the North Arm public access on Lake Minnetonka using strategies grounded in behavior change psychology for AIS prevention actions. At the conclusion of the 2023 season, 21 county accesses have now implemented at least one behavior change strategy. Work with these 21 accesses includes partnering with 15 different access administrators.

The county’s behavior change strategies at water accesses include:

CD3 waterless cleaning system, which provides the tools to facilitate the actions.
Pavement markings to influence traffic flow.
Designated locations to take AIS prevention measures.
Signs to prompt the desired behaviors.

Key takeaways from this work include improved compliance rates and self-inspection rates and that these strategies can be a cost-effective way to help prevent the spread of AIS.

This work can often be accomplished in partnership with county staff. If you interested in discussing how behavior change strategies could be incorporated into your access, contact Tony Brough at 612-348-4378.

Reports and studies

AIS Prevention Aid Guidelines 2020–2025

Hennepin County has received funding from the State of Minnesota since 2014 to implement plans to stop the introduction or limit the spread of AIS. To receive funding, the county must establish guidelines for the use of the proceeds.

In 2019, adjustments were made to the county’s AIS prevention aid guidelines to direct the use of funds received 2020 through 2025. County staff engaged more than 60 stakeholders in evaluating the county’s AIS prevention programs, guidelines and funding options. Learn more about the evaluation by reading the Aquatic Invasive Species Program Evaluation Report (PDF).

Changes to the guidelines include:

Updating the goals to reflect the Natural Resources Strategic Plan
Defining the county’s best practices for public water access design
Emphasizing unpredictability in inspections
Setting funding by category goals to ensure the program is comprehensive
Funding of core program functions of enforcement at public water accesses and public access redesign project outside of a grant solicitation process to help partners with long-term planning and streamline administrative tasks to implement public access redesign work.

See the 2020-2025 AIS Prevention Aid Guidelines (PDF) to learn more.

Accomplishments report

The accomplishments report highlights how Hennepin County is using the state funding and the results of the projects we support. See the 2023 AIS prevention program accomplishments report (PDF).

AIS prevention behaviors at river accesses

Hennepin County partnered with Bolton & Menk in 2022 to conduct observations at five public river accesses in Hennepin County to determine the extent of AIS prevention behavior of those using the accesses. Read the report (PDF) to learn more.

CD3 usage data

In 2022, Hennepin County partnered with HCI Hughes Company Innovations to analyze past and current data of CD3 stations for better operation and decision-making. Review a summary of the findings for more information (PDF).

AIS in pet stores and garden centers: inspection and education

In 2021, we partnered with Fortin Consulting, Inc. to inspect retail pet stores and garden centers for aquatic invasive species (AIS) as a potential pathway for spreading AIS to Minnesota lakes and streams. Read the report (PDF) to learn more.

Lake Minnetonka early detection survey

An early detection survey with a focus on Starry Stonewort was conducted on Lake Minnetonka in partnership with the Lake Minnetonka Association and PLM Lake & Land Management Corp in 2023. County funding was utilized to survey seven public water accesses, four working accesses, and five private water access sites. These surveys were then combined with plant surveys directed by the Lake Minnetonka Association, resulting in more than 1,700 site surveys throughout Lake Minnetonka. The good news is that no Starry Stonewort was identified in these surveys. Read the PLM Lake & Land Management Corp site survey report (PDF, 2,142 KB) for details.

Medicine Lake AIS aerial early detection pilot

In 2020, we partnered with HCI Hughes Company Innovations to conduct an innovative Aquatic Invasive Species early detection project utilizing an industrial drone. The drone was equipped with high-resolution optical and multispectral sensors and mapped approximately 50 acres on Medicine Lake. The area mapped was known to have three aquatic invasive species including Starry Stonewort. Read the analysis and findings (PDF) to learn more.

Invasive goldfish study

In 2020, we partnered with the Nine Mile Creek Watershed District to assess the goldfish population and movement in Lake Cornelia system. Goldfish up to 16 inches in length were captured during this study and it was estimated that 27,472 goldfish exist in North Cornelia alone. Goldfish were recently added to the priority list for investigation and the county is on the leading edge of this work. Antennas were installed to monitor the movements of tagged goldfish to identify recruitment locations. Read the full invasive goldfish population and inter-waterbody movement assessment (PDF) to learn more.

Lakes with limited access study

Hennepin County funded Fortin Consulting to survey 13 lakes and ponds without public boat access for the presence of aquatic invasive species. At least one aquatic invasive species was found in each of these waters, including curly-leaf pondweed, Chinese and banded mystery snails, and invasive carp and goldfish. The results from these surveys show AIS can spread into lakes without public boat accesses. These results highlight that efforts for prevention need to extend to multiple pathways. Read the full assessing the risk of AIS in waters with no public access report (PDF) to learn more.

Lake public access observations

This project is part of an effort to identify and manage pathways for the introduction and spread of invasive species into and within Hennepin County. The purpose of this project is to conduct observation research of aquatic invasive species (AIS) prevention behavior for those using public lake accesses in Hennepin County.

See the 2020 lake public access observations for Aquatic Invasive Species prevention behaviors report (PDF).

Social media partnerships

In addition to ongoing posts on Hennepin Environment and Energy’s social media accounts, two social media partnerships were funded in 2023. Up to 18 other counties also partnered in these social media campaigns.

Submersed jets to minimize vegetation at water access

In partnership with the University of Minnesota St. Anthony Falls Laboratory, research was completed in November 2023 to measure the effectiveness of submersed jets. These water jets can move surface water with the goal of minimizing invasive species directly at the access. Findings showed that most (67%) observations found less mass of suspended vegetation fragments with the jet operating.

Submersed jet report (PDF, 3 MB)

Watercraft inspection programs

Watercraft inspectors/ambassadors provide a one-on-one interaction with those using our county lakes. Each year $100,000 is contracted to expand existing countywide watercraft inspection programs and in 2023 two pass-through grants were also awarded. Below are the end-of-the year reports that were provided.

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