Archive for July, 2007

What happens to the milfoil?

Friday, July 27th, 2007

Our divers remove prodigious amounts of milfoil from the lake each week. When they are hand fertilizer picking four divers can fill between 120 and 180 catch bags each day. Using the suction harvester they can get two or three times as much in the same time. You have probably seen the mounds of soggy milfoil accumulating on the side of the road across from the boat ramp.

Just about the only good thing about this weed is that it is excellent fertilizer! When I began working with the divers I wondered how we would get rid of it. It turns out that local farmers and gardeners are glad to take it to put on their gardens. The picture above shows how it happens. I have been told that decaying milfoil is nutritious for flowers as well as vegetables. Please feel free to help yourself.

rack In case you wanted to see what the “trash rack” looks like out of the water, here it is. Not shown is the portable hydraulic pump that lifts the rack like a dump truck to empty it of its heavy load of harvested milfoil.

Annual Meeting of the Lake Fairlee Association

Thursday, July 19th, 2007

View from the LodgeOn Saturday, July 14th, the Lake Fairlee Association held its annual dinner and meeting. The location was a new one for us this year, porch2 the lodge of the former Lake Fairlee Camp, with a commanding view across the south end of the lake. A complete reconstruction of the lodge is in its final stages, and we are grateful to the Aloha Foundation for generously allowing us to meet there.

porch1Attendance was up this year, to over 110 attendees. dinner Early arrivals engaged in spirited conversation over cocktails on the porch.

Dinner was barbecued chicken with all the fixings, and this year there was more than enough food!

After dinner our new president elect, Susie Kerr, moved the agenda briskly along. We heard a report from dinnerGreg McGrath of Lake Morey about their early success treating portions of their lake with the herbicide Renovate. Skip Brown introduced some of our dive crew and explained something about their work to eradicate milfoil. Treasurer Ridge Slatterthwaite reported on the Association’s finances, and explained how the State of Vermont’s grant this year will be reduced by over a third from last year’s amount. Suzy also introduced several new arrivals to the lake who were in attendance. After some general questions and discussion the meeting was adjourned.

Milfoil Education

Sunday, July 8th, 2007

A big part of our effort to combat the spread of milfoil in our lake takes place away from the water. Public education about our milfoil problem, and about invasive species in general, is an important complement to our eradication strategies in the lake.

Educating the public about milfoil and its threat to our lake’s ecology and economy serves several purposes. First, it alerts boaters and others about how their choices can make them part of the problem or part of the solution. Milfoil and other invasive species are believed to spread from lake to lake on the unwashed bottoms of boats or trailers, in their bilges, or inside the water cooling channels of their motors. Second, it engages lake residents, lake users, and community members to the possible economic harm to the region if milfoil were to take over the lake, as it will if unchecked. This will encourage them to support our effort by volunteering, by making a gift, or just by spreading the word.

Milfoil Float in ParadeThis year we are trying two new ways of reaching the public. The first was a “float” in the fourth of July parade in Fairlee. We decorated a pickup truck with our banner and diving gear, and announced our arrival with upbeat music (Yellow Submarine!). Our entire dive team marched behind, with a few volunteers, handing out fliers.

Jane carrying MilfoilOur presentation was well received. Some viewers were at first confused by our message. What was Jane carrying in her hand? Seaweed? No, a handful of milfoil. It got their attention, though, and invited further questions. Once they understood, they were very supportive. We received cheers and applause, without throwing a single piece of candy! Here are more pictures of us in the parade.

Another initiative we hope to be starting this summer is to have a presence at the boat ramp. We plan to have a volunteer present at the boat ramp Saturday mornings and afternoons, speaking to boaters and answering their questions about milfoil. This program is still being developed. If you want to volunteer or have other suggestions please email.

Finally, our slogan. We were looking for something catchy to put on our parade “float.” The banner below is what we came up with. We are always looking for other ideas for this year or next, so don’t be shy!

banner

Suction Harvesting

Tuesday, July 3rd, 2007

Suction Harvester 6934 Where the milfoil growth is thick hand harvesting is not adequate. Since each plant has to be pulled at the roots and every part of the plant has to be completely removed from the lake, we employ a device like a huge underwater vacuum cleaner, called a suction harvester. A high volume pump mounted on the pontoon boat sucks water through two long four inch hoses.

Divers with Hoses 6929Divers with scuba gear take these hoses down to the root end of the plants. They can pull the plants with the roots, and the whole thing is sucked into the hose and whisked away. One of the continuing problems working on the lake bottom is diminished visibility when the silt on the bottom is disturbed. Pulling milfoil plants severely clouds the water, but the suction harvester pulls the silted water away too, making it much easier to see.

Trash Rack 6951The hoses empty out into a floating contraption attached to the pontoon boat, which the divers colorfully call the trash rack. I am not sure the name describes its function or its condition. In any case, the streams of water carrying milfoil and silt spray against its perforated sides. The milfoil stays inside, and the water escapes.

Climbing in 6939 Scraping 6944The two divers who are not at the moment underwater picking milfoil and stuffing it into the hoses climb into the trash rack and scrape the milfoil from the screen, keeping the openings from getting clogged with debris and the milfoil waste from overflowing into the lake.

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