How do I remove the ice ridge that formed this past winter?
Most work done on shorelines, below the ordinary high water mark, require a Public Waters Work Permit.
However, Minnesota rules allow for some exceptions with regard to ice ridges.

Click here to learn about the Ice Ridge Exceptions

What have the Big Marine Lake Levels been historically?
The DNR has tracked lakes levels on Big Marine Lake since 1965. The following is a graph of their recordings:

What is Eurasian Water Milfoil?

How do we survey and treat Eurasian Water Milfoil?

What are Zebra Mussels?

What is Flowering Rush?

What is Starry Stonewort?

‎Blaine Barkley‎ to Lake Sylvia, Annandale, MN
July 10
For those that might not know what starry stonwort can do to a lake, this picture says it all. This is not just something floating on the surface. What you see is starry stonewort growing from the bottom of the lake to the surface. The "plant" density is unlike anything you have ever experienced when it gets growing rapidly. Go look at your bathtub, inagine it full of water, and then dump a bale of straw or hay into it and let it soak for an hour or two. That is my best description of what is invasive specie is like when it grows to maturity. These pictures were taken by me at Lake Koronis which pretty much has the entire shoreline infested with it. As I recall their four year treatment plan was about $800,000 and it hasn't stopped it.

What are Non-Native Phragmites?

What is Curly Leaf Pondweed?

What are key organizations working on AIS and other lake issues?
In addition to supporting the BMLA, support is also much needed for other organizations which have been very crucial in furthering the AIS cause and other issues of concern for BML.

Refer to their websites for additional information.

These are:

Minnesota Lakes and Rivers Advocates
P.O. Box 22262
St. Paul, MN 55122
Phone: 952-854-1317
MLRA is the main channel for getting the message from lake associations to the MN Legislature. They were a major factor in the 2014 passage of legislation which funded money to the counties for AIS work.

Minnesota Aquatic Invasive Species Research Center
2003 Upper Buford Circle, Skok Hall 135
St. Paul, MN 55108
This organization funded by the MN Legislature is doing critical research work to further the science of AIS and find solutions to myriad existing and future AIS issues.

Minnesotans for Family Fishing and Healthy Lakes
This group with a lobbyist at the MN Legislature was a significant influence in putting a hold on Muskie stocking proposed by the DNR and opposed by numerous lake associations and individuals.

What was the year by year herbicide treatment of BML?

What is the composite of treatments from 2009 through 2019?

If the BMLA lets down our guard, the 2009 to 2019 BML EWM Treatments Composite map below shows what could happen to BML. It would actually be worse since the map doesn’t show all the spots in the east bay (west of the channel connecting east and west ends of the lake) where the BMLA has spot treated every year. Sediment testing done during the winter of 2014 found that the lake can support at least 300 acres of EWM and this map shows what it would look like if the BMLA wasn’t aggressively working to kill it.

The BMLA has been able to accomplish control and killing of EWM via:

1. Increasing our membership and membership contributions.
2. Seeking and receiving grants every year since 2009.
3. Generating ideas and procedures that have enabled the BMLA to kill rather than just control EWM. These new methods take significant volunteer time to implement and cost more than traditional EWM treatment.
4. These ideas, new protocols, and hundreds of volunteer hours have been the basis for obtaining all of the grant funding which will total about $120000 by the end of 2019.
5. Developing our own equipment to treat small spots of EWM. BMLA has been spot treating every year in addition to the licensed applicator treatments. We were the first lake association the DNR permitted to do our own spot treating.
6. Developing our expertise in surveying and mapping the locations and defining the shape of the EWM polygons (areas).
7. BMLA Board members have attended numerous seminars and developed good relationships with people in the AIS field including the DNR, PLM Lake and Land Management Corp (our herbicide application contractor), Blue Water Science (consultant Steve McComas), Minnesota Lakes and Rivers Advocates (MLRA), MAISRC (U of M Aquatic Invasive Species Research Center), and the CMSCWD (Carnelian Marine St. Croix Watershed District).

Methods used:

1. Multiple herbicide treatments in 24 hours to help insure that the dose remains high (in the kill zone) long enough to kill rather than just weaken the EWM.
2. Direct herbicide injection into the EWM root balls.
3. Having PLM apply the new herbicide, ProcellaCor, which kills EWM with a shorter dwell time than previous herbicides, on many small areas in 2019. It is difficult to kill small areas because even a small drift in the water column moves the herbicide off target.
4. The plan is to have PLM apply a contact herbicide in mid-to-late August, 2019 on EWM that is still growing. A contact herbicide only kills the leafy green portion of the plant. There is anecdotal evidence that if the leafy portion of the plant is killed late in the season, the inability to photosynthesize will starve the roots so they will not survive the winter. The herbicide will also kill the leafy green “EWM rootlets” which self-fracture and spread EWM to other parts of the lake.

If the BMLA wasn’t active:

1. The east west channel would fill in with EWM.
2. The Girl Scout Camp would be surrounded by EWM and the passage to the north bay would be blocked.
3. There would be a ring of EWM around the entire main bay and around the island.
4. About 30% of both the east and west shores of the north bay would have EWM, plus the two small yellow dots in the north end would connect across the bay if the BMLA had not spot treated in those areas. The composite map doesn’t show this spot treating.

What are BMLA expenses?
BMLA spend its funds on:

* Herbicide treatment by our licensed applicator.
* Herbicide spot treatment by the BMLA.
* Consultants.
* Donations to organizations which work on AIS control and prevention efforts statewide.
* Communications – newsletter mailings, etc.
* Insurance.
* Permits.

BMLA Expenditures by Year

Year    Dollars
2010    $   9,888
2011    $   8,390
2012    $   9,639
2013    $ 10,712
2014    $ 13,595
2015    $ 33,740
2016    $ 35,040
2017    $ 37,776
2018    $ 21,350
2019    $ 28,000 Estimated

Why have expenses varied from year to year?

* Starting in 2016, a switch was made to a more expensive herbicide, granular renovate OTF. OFT is more effective on EWM potentially hybridized with native Northern Milfoil.
* Herbicide changes are necessary about every four years because EWM develops herbicide immunity.
* The acreage treated has varied each year.
* The BMLA invested in the development and testing of injecting the EWM root balls in 2017.
* The BMLA purchased mapping software in 2017, which significantly reduced the need for the assistance of consultants in delineating and mapping the EWM in Big Marine.

What was the summary of EWM treatment funded by the Initiative Foundation?
Click here to view and download the summary