Zebra Mussel Eradication Update from Eric Fieldseth – MCWD AIS Lead

We are 7 days into treatment, and have reached 100% mortality of the zebra mussels samples in the small 0.61 acre area surrounding the access. As of today, we are currently at 36% mortality in the larger, 29 acre site. We expect to see more mortality in the coming days, hopefully reaching 100% by Friday, but no guarantees.

As far as non-target impacts, the Dissolved Oxygen crashed pretty early, there has been a small fish kill composed of a couple pike, several bullheads and some small perch. The majority of the dead fish seem to be bullheads, mostly really small ones. They are not numerous, you have to drive through the water lilies to see them. There are still a lot of fish swimming around, and since we are at 100% mortality in the small area, we cut a few zip ties at a couple seams in the barrier to hopefully allow fish to get out of that area. The native mussels we had in our sample cages are also mostly dead, there is still one alive in the larger area. As far as vegetation, we saw very early impact to Coontail, its mostly gone from the channel. Sago Pondweed and Eurasian Watermilfoil remain fairly abundant.

We’ve had three bump treatments since the initial treatment, with another small bump likely tomorrow. Concentrations seem to be holding fairly steady now. We’ve used 1300 gallons out of the 2100 gallons that were initially ordered so far. We will likely have some left over, I’ll work with the manufacturer on our options for any leftover chemical.

As far as the access reopening, Carver County will make that decision. I think we’ll have a really good idea on how realistic that is in the next couple days.

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Camp Tanadoona Volunteer Day is Saturday September 24th

Tanadoona Volunteer Day
Saturday, September 24
1:00 – 4:00 p.m. at Tanadoona

Bring the family, co-workers and friends to help protect the natural beauty of Tanadoona by improving water quality at and around Lake Minnewashta!

Volunteers will help remove buck thorn, spread wood chips, rake and more to help prepare camp for winter.

With a variety of projects this is a great volunteer activity for families, groups and individuals! We have projects for ages 6 and older. Please register in advance. Follow the link below for more information. Click here to register.

Camp Tanadoona Volunteer Day

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


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

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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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