Resident Input Invited at LMPA Board Meeting – September 20, 2016 at 7PM – Gunther’s House 3628 Hickory Road

Agenda

I. Call to order:

II. Approval of minutes
* Review/approval of last meeting minutes (Steve G)

III. Resident input on agenda items

IV. Reports:
* Financial Update including fundraising and budget (Jim)
* Zebra Mussel treatment status (Steve G)
* CMCW update (Steve A)
* Neighborhood Captains (Scot)
* Communications (Steve G)

V. Unfinished Business:
* Groundwater management (Rick)

VI. New Business
* 2016 Annual Meeting proposal for October
* 2016 Calendar (All)
* How to address Algae levels in the lake

VII. Adjourn

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What’s Going on at Roundhouse Park?

Thanks to Chanhassen’s Parks and Recreation director Todd Hoffman, city staff and input from the neighborhood, some great new amenities are being added at Roundhouse Park off of Minnewashta Parkway. A tennis court and pickle ball courts are among those improvements. Here’s a link to the Roundhouse Park Improvements

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Zebra Mussels Discovered in Lake Minnewashta – Rapid Response Plan Update

As you may know, on August 18th, during a routine weekly check, four zebra mussels were found under one of the two piers at the Carver Parks boat launch on Lake Minnewashta. The following day, a team of people inspected a broader area of “Little Minnie” as well as 8 other areas of the lake. Ten additional zebra mussels were found near the launch but none were found beyond the public access.

A plan of attack has been developed with the Minnehaha Creek Watershed District, Carver County, the Department of Natural Resources and the Lake Minnewashta Preservation Association. The MCWD’s Aquatic Invasive Species Program Manager, Eric Fieldseth, is serving as the leader of the effort. Here is where we are at:

1. Carver Park’s Boat Access #1 was closed and Boat Access #2 was opened.

2. Two containment barriers were purchased and installed by Carver County in Little Minnie by Boat Launch #1.

3. An eradication plan was developed and approved by all parties including the DNR. A well known copper-based algaecide, Earthtec QZ, will be applied in a 0.5 parts-per-million dosage. Click on http://www.earthtecqz.com/index.htm for more information. Treatment is tentatively scheduled to begin next Tuesday, September 13th at 10:00 am. Additional treatments will occur throughout the duration of the project as needed to maintain our desired concentration. Duration of treatment is predicted to take between 8 to 14 days depending upon zebra mussel mortality results. MCWD staff will be monitoring the treatment and coordinating applications throughout the project.

4. Once the zebra mussels have been eradicated, remove the containment barriers and reopen Boat Access #1.

5. Continue monitoring Little Minnie as well as our 10 existing monitoring stations around the lake to assure that zebra mussels are fully eradicated. Residents who currently have monitoring plates in place should check them immediately and report any findings to the MCWD and Steve Gunther.

A lot of people have been working very well together in making this happen. The very capable leaders of the team are Eric Fieldseth from the Watershed District and Drew Dickart from Carver County’s Aquatic Invasive Species program. The LMPA offers them and the entire team our hearty thanks.

As to funding for this project, the MCWD, Carver County and the LMPA each are sharing in the costs. As of this writing, the county has spent $10,000 and committed another $5,000, the MCWD has committed about $10,000, and the LMPA has committed $15,300. Eric Fieldseth had good results convincing the material supplier to cut our costs significantly.

Stay tuned and when a request for donations is made, please give generously.

Keep in touch – Be sure to give us your email address so we can add you to our electronic newsletter distribution. Or check our website at www.lakeminnewashta.org. And join our Lake Minnewashta Preservation Association Facebook group! Or tweet with us @lakeminnewashta. Or email us at info@lakeminnewashta.org

Please don’t hesitate to contact me if you have questions or comments about things we are or are not doing. Thanks for reading and thanks for your support!

Steve Gunther
President, Lake Minnewashta Preservation Association
stgunther@gmail.com
612-859-3729

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Lake Minnewashta Regional Park Boat Access #1 Closed – Memo From Carver County

LMPA Bulletin – August 25, 2016

Memo From Sam Pertz, Carver County Parks

August 25, 2016

Dear Resident,

This letter is to advise you of changes in boat access operation at Lake Minnewashta Regional Park starting on August 24, 2016 and continuing until further notice. The recent findings of zebra mussels near the Boat Access #1 (main lake access) has resulted in the deployment of water containment barriers in an attempt to eradicate zebra mussels near the ramp and out into a portion of the channel. The containment barriers needed for water treatment will prevent watercraft from entering/exiting the lake from this access.

The former boat access #2, located south of the park’s beach is open for use. We realize water levels can greatly impact the functionality of this access. Having received above average rainfall, the current water level is suitable for most watercraft.

At this time, we do not have a schedule to reopen the main lake access. We are working closely with the DNR and Minnehaha Creek Watershed District staff and will provide information as it is available. Please refer to our park webpage for updated information – specifically located on the Minnewashta Regional Park page (Public Boat Access) at http://www.co.carver.mn.us/departments/public-works/parks-recreation/parks-trails/lake-minnewashta-regional-park.

Should the treatment require a longer-term closure, coordination will be made to allow watercraft the ability to leave the lake through the primary access.

Additional information on the water treatment effort can be found through the Carver County Planning and Water Management webpage at http://www.co.carver.mn.us/departments/public-services/planning-water-management or by phone 952-361-1871, and the Lake Minnewashta Preservation Association website at http://lakeminnewashta.org.

Should you have questions about boat access operations, please contact our office at 952-466- 5250 M-F 7:30a.m. – 4:00p.m.

Sam Pertz
Parks and Trails Supervisor
Carver County Parks

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Regional Park Boat Access #1 Closed as Zebra Mussel Containment Barriers Installed

IMG_2859From the Minnehaha Creek Watershed District

Wednesday, August 24, 2016

The Minnehaha Creek Watershed District (MCWD) has discovered zebra mussels at the public boat access to Lake Minnewashta in Chanhassen. While official confirmation from the Minnesota Department of Natural Resources (DNR) is pending, the MCWD and Carver County are working with the DNR to plan a rapid response in the hopes of preventing their spread lake-wide.

MCWD’s aggressive early detection monitoring led to the discovery. During a regular site visit on Thursday, August 18, MCWD staff found four zebra mussels on rocks in shallow water under one dock at the public boat access. Ten more were found in the same vicinity during a lake-wide search the following day. No additional zebra mussels were found outside of the public access. The zebra mussels were between two and 12 millimeters in size, indicating they were likely not reproducing. Water samples were taken to determine whether zebra mussel larvae (veligers) are present. Those test results are pending.

MCWD staff and Carver County are working with the DNR to plan a vigorous and effective course of action. MCWD’s and Carver County’s aquatic invasive species (AIS) programs have set aside funds for AIS rapid response. A barrier has been placed around the public boat access in an effort to contain the infestation. A second barrier was placed at the channel that connects the bay where the public boat access is located to the rest of the lake. Boats are being redirected by signage to the former boat launch area #2, approximately ¼ mile further into the park, until further notice.

Minnewashta channel area

Treatment options are being considered. The low number of zebra mussels detected, their young age and their location improve the chances for success. The approximately 30-acre bay where the public boat access is located is connected to Lake Minnewashta by a small channel that lacks the conditions conducive to zebra mussel survival. Due to these factors and the early detection, it may be possible to eliminate the zebra mussels from the site and prevent their spread throughout the lake.

MCWD conducts regular monitoring of Lake Minnewashta, which is considered at high risk for zebra mussels due to its proximity to Lake Minnetonka, where zebra mussels have been present since 2010. Weekly early detection checks at the public access include examining the zebra mussel sampler and checking rocks and other hard surfaces. MCWD staff also conduct a snorkeling survey at the public access and have equipped citizen volunteers with zebra mussel samplers that they monitor throughout the lake.

More information will be provided as it becomes available. Learn more at www.minnehahacreek.org/ais.

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Zebra Mussels in Lake Minnewashta – Update and Proposed Rapid Response Plan

A meeting was held on 8/22/16 at the Minnehaha Creek Watershed District’s offices to review the discovery of zebra mussels in Lake Minnewashta and develop a Rapid Response Plan of attack. Representatives from the MCWD, Carver County, the city of Chanhassen, the MN DNR, Christmas Lake Homeowners Association and the LMPA attended and the spirit was very cooperative. The MCWD’s Aquatic Invasive Species Program Manager, Eric Fieldseth, led the meeting and provided the following information.

On August 18th, during a routine weekly check, four zebra mussels were found under one of the two piers at the Carver Parks boat launch on Lake Minnewashta. The following day, a team of people inspected a broader area of “Little Minnie” as well as 8 other areas of the lake. Ten additional zebra mussels were found near the launch but none were found beyond the public access. The mussels all appear to be juveniles but water samples were taken to see if infant mussels (veligers) were present. If found, that would indicate the mussels were reproducing. Those results are not yet available.

There is some good news.
1. The mussels were found only in the public areas.
2. The channel connecting Little Minnie to the rest of the lake offers a very poor substrate for mussels to adhere. They like rock and weeds not muck.
3. It appears that only juveniles are present but we are awaiting the water samples
4. It appears to be a recent introduction. As a reference, when Christmas Lake reported their mussel problem, they saw over 5000 in their sample. We caught it early.
5. Conditions are such that containment and treatment are a reasonable option.

Christmas Lake’s experience in 2014 offered some valuable lessons on Rapid Response
1. Immediate response is needed
2. Treat a much larger area than when you found them
3. We’ve learned a lot on what products can be effective at killing them without harmful side effects

A PROPOSED plan of attack was developed. Final actions, costs, approvals and timing are being worked but the proposal is to:

1. Close Carver Park’s Boat Access #1 and reopen Boat Access #2 . Access #2 is to the left of the Public Beach as you are looking to the water. This may prevent transporting zebra mussels from Little Minnie to the larger section of the lake and may happen as soon as Wednesday August 24th. NOTE: This is a shallower launch than Access #1 so proper care much be taken especially with inboard and V-drive boats and some pontoon boats with bunk/fixed height trailers.

2. Purchase and install containment barriers in Little Minnie. The area to be contained is being finalized. Delivery and installation of the barrier may happen as soon as Wednesday August 24th. This effectively closes that launch and all boat traffic into and out of the lake will take place at Launch Access #2.

3. Once contained, work the next steps of the process to eradicate the zebra mussels. This is the hard part!

4. Ensure the zebra mussels have been eradicated, remove the containment barriers and reopen Boat Access #1.

5. Continue monitoring Little Minnie as well as our 10 existing monitoring stations around the lake to assure that zebra mussels are fully eradicated.

The team is still working on finalizing the Rapid Response Plan including developing the eradication plans, securing agreement, approvals, materials and vendors and communicating our plans. The very capable leaders of the team are Eric Fieldseth from the Watershed District and Drew Dickart from Carver County’s Aquatic Invasive Species program. The LMPA offers them and the entire team our hearty thanks.

Finally, although we expect that the MCWD and Carver County will provide a lot of the funding, the LMPA has offered financial support as well. Stay tuned and when a request for donations is made, please give generously.

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