The date has been finalized as Tuesday, June 16th. This is somewhat later than we would prefer, but the treatment requires that the target plants be growing, which is happening later than usual this year because the lake remained iced over quite late.
The lake will be closed to all use on the 16th and the 17th. This means no boating, swimming, wading, fishing, etc. This restriction will be lifted on Thursday the 18th, when all these activities can resume. The State requires that lake water not be used for drinking or cooking until the level of herbicide in the lake falls below 75 parts per million, which should not be much of an inconvenience as there are other good reasons not to drink water from the lake.
The most significant inconvenience, at least for some people, is the restriction on using lake water for irrigation -- for up to 120 days. Even though triclopyr is deadly to milfoil, it is pretty much harmless to humans and animals. It turns out that it is also not toxic to grasses, but might harm your flowers, vegetables, and trees.
There is a lot more information about this year's treatment on our blog at http://blog.lakefairlee.org/?page_id=87.
for the Lake Fairlee Association