Zebra mussels found in Lake Hiawatha
Last week the Minnesota DNR and Minneapolis Park and Recreation Board (MPRB) confirmed the presence of zebra mussels in Lake Hiawatha in Minneapolis. 
Their presence is unfortunate but not surprising -- both Lake Hiawatha and Lake Nokomis were declared "infested" after zebra mussels were discovered in Lake Minnetonka and Minnehaha Creek in 2010. Minnehaha Creek flows directly through Lake Hiawatha. To date there have been no zebra mussels discovered in Lake Nokomis, which is separated from the creek by a weir structure
In 2012, MCWD staff found zebra mussels as far down the creek as the Mill Pond in Edina, but as of late June had not found any in the creek this season. The invasive mussels in Lake Hiawatha were found attached to logs and branches floating down the creek, allowing them to travel faster and further. 
On Monday MCWD and MPRB staff inspected Lake Hiawatha and the area immediately upstream. They found an additional six zebra mussels -- five attached to woody debris and one attached to a buoy. No mussels were found directly upstream. District staff will check Lake Nokomis for zebra mussels later this month. 
Because Minnehaha Creek freezes in the winter, its zebra mussel population starts over each year. The MPRB and MCWD aren't planning any treatments on Lake Hiawatha this year, and hope that the few invasive mussels that made it in the lake will not survive the winter.

USGS Zequanox study postponed; but testing will occur this fall
The United States Geological Survey has postponed its study of Zequanox in Lake Minnetonka until spring. Zequanox is a non-chemical treatment used to kill zebra mussels, which the USGS tested last year in a laboratory environment in northwest Minnesota.  It is now ready for testing in open water.
However, the maker of Zequanox, Marrone Bio Innovations, has contracted the USGS to do a separate, smaller-scale study on the treatment in Lake Minnetonka. It will test the treatment in an enclosed barrier in Robinson's Bay, replicating a successful 2012 study in Illinois. That treatment will occur next week and analyzed next month.
Three-year zebra mussel sampling study on Lake Minnetonka wrapping up
District staff are in the final month of a three-year intensive survey of zebra mussels in Lake Minnetonka, which began shortly after they were discovered in the lake in 2010. The data will help scientists understand how the mussels reproduce and proliferate in the lake. 
Staff monitored between 30 and 40 sites throughout the lake, with two samplers at each site -- one checked monthly and another at the end of each season. The MCWD will synthesize the data and release a report in early 2014. 
Carver County and Minneapolis Park and Rec Board named "Watershed Heroes" for AIS efforts
Congratulations to Carver County and the Minneapolis Park and Recreation Board, who jointly won the 2013 Watershed Heroes "Innovation in Government" award for their bold moves to prevent the spread of AIS. 
Both have been actively partnered with the MCWD the past two years to develop effective AIS programs, including boat inspection stations and participation in the task force that helped create the District's AIS Management program.

The Watershed Heroes awards honor citizens and organizations that make significant contributions to clean water within the MCWD. RSVP today for the awards gala on Thursday, October 17 at the Bayview Events Center in Excelsior. 

MCWD seeks Outdoor Heritage Funds funds for AIS decontamination stations 
On Wednesday, Sept. 4, the MCWD presented a $2 million proposal to the Lessard-Sams Outdoor Heritage Fund Council, which distributes grant money statewide for projects that protect and improve habitat. The District's proposal aims to stop the spread of AIS within the District and create a model that could be replicated across the state. It included four key elements: 
  • Prevention -- Central facilities for boat cleaning/decontamination and inspection, and improving boat accesses
  • Applied science -- Containing, monitoring and cataloging detected AIS in the watershed, expanding carp management, and more
  • Public outreach -- Reinforcing statewide messaging strategies, building partnerships and using social marketing principles to help people do the right thing
The Council hears many excellent proposals each year, so the District is facing tough competition. The grant winners will be announced later this fall. 

Dotted Line

MCWD Banner Logo


(C) Copyright 2010, Minnehaha Creek Watershed District.
All rights reserved.