Truesdale Lake  

South Salem, New York

May 8, 2014
by rob
Comments Off on May 14th Lake Treatment

May 14th Lake Treatment

Allied is scheduled to treat the lake for Curly Pondweed next Wednesday, May 14, 2014. The main summer board will go in and Ken will build up the dam to hold the treatment in for 14 days.

Since Allied will be applying an herbicide, posted signs will indicate no swimming for 24 hours and no irrigation for 14 days.

Information about the 2014 treatment program for the lake is available here.

February 26, 2014
by rob
Comments Off on A Meeting for Southern NY Lake Associations on Lake Management Options

A Meeting for Southern NY Lake Associations on Lake Management Options

The Three Lakes Council is sponsoring a meeting at the South Salem Firehouse (1190 Route 35, South Salem, NY) for southern New York lake associations on Thursday, March 27th, 2014 from 6:30 – 8:30pm.

Allied Biological is organizing the speakers including representatives from Vertex Aeration Systems, BioSafe Systems, and Glenn Sullivan, President of Allied Biological. The topic is Lake Management.

Space is limited as this invitation has gone out to lake associations in the southern New York area. Please limit your attendance to four people per association.

RSVP by March 20th, 908-850-0303 or glenn@alliedbiological.com.

Light refreshments will be served.

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February 14, 2014
by rob
Comments Off on Love Your Lake: Valentine’s Resolutions for Lake Area Homeowners

Love Your Lake: Valentine’s Resolutions for Lake Area Homeowners

cropped-swans_heart_necks.jpg

Thanks to Janet Andersen for these timely resolutions:

Lake Stewardship Resolutions:

  1. This year my septic tank will be pumped and inspected. If the tank baffles are missing or damaged, I’ll have them replaced. (Kaiser-Battistone offers 15% discount for lake area residents – but you have to tell them about the discount!)
  2. I will “overseed” my lawn rather than spread fertilizer or pesticides. I’ll tell my lawn service – or myself – to cut my grass high and leave the clippings on the lawn. If I think fertilizer is needed, I’ll use phosphate-free fertilizer since it’s the law. I will also tell my lawn care company that it is illegal in Westchester County to use phosphate based fertilizer unless extensive testing has been done on the soil – and even then only on a limited basis and never within 20 feet of the lake.
  3. If I live on the lake, I’ll plant a “buffer” of native plants to slow the flow of rainwater or stormwater (and the pollutants and nutrients it carries) into the lake. I’ll pull up some invasive plants and plant some native ones.
  4. I’ll pick up after my pets and throw their poop into the trash.
  5. This year I’ll make sure no oil or gas from my mower or car spills on the ground or into the lake.
  6. If I take coolers, sand toys, or other beach or boat items to another waterbody, I’ll make sure that they are free of weeds and shells before bringing them back here so I don’t transport invasive plants and animals.
  7. If I haven’t done so already, this is the year I’ll take a safe boating course.
  8. I’ll start or use a compost pile (away from the lake shore, wet areas, or streams).
  9. If it’s icy, I’ll minimize my use of salt by using kitty litter or sand where I can.
  10. I’ll learn more about my lake’s history, health, plants, or animals this year.

Happy Valentine’s Day to all!

February 5, 2014
by rob
Comments Off on Republished: May 7th 2009 EcoLogic Lakes Report Presentation to Town Board

Republished: May 7th 2009 EcoLogic Lakes Report Presentation to Town Board

This is a re-publication of an article first posted on this website in 2009 here (link goes to old website archive).

We recently came across it and are re-posting it for the benefit of residents new and old.

Multiple watersheds shown including specific watersheds for the seven different lakes in town.

On May 7th, 2009 at 7:30pm the firm EcoLogic, LLC of Cazenovia, NY will present the townwide lake study to the Town Board. The Town Board meeting for that evening is scheduled for 7:30PM at the Increase Miller School in Goldens Bridge. See the Town of Lewisboro website for more details and agenda.

History:

In August 2007, EcoLogic, LLC entered into an agreement with the Town of Lewisboro via the Lewisboro Lakes Committee to develop a planning document outlining management of the lakes and watershed areas within the Town.

The report is available here (around 10Mb pdf file).

The zip file containing the MS Access database used for producing the charts, graphs, and analysis is available here. (2.5Mb est zipped size)

Four specific objectives were cited:

  • Create a central repository of natural resource data, statistics, and testing data for each of the lakes in the Town;
  • Summarize each lake’s water quality and environmental concerns;
  • Recommend the most logical, environmentally sound, and cost-effective sequence of projects to improve and maintain water quality throughout the Town;
  • Synthesize and collate all the studies on each of the lakes.

Additional data gathering and evaluation tasks were included to meet the overall objectives. This document – Town-Wide Comprehensive Lakes Management Plan – summarizes the water quality and aquatic habitat conditions of seven lakes in the Town of Lewisboro, and recommends measures for their protection and restoration.

Report Organization

The Town-wide Lakes Management Plan is organized in three sections. The first is composed of this introduction, a summary of the environmental settings of the lakes, followed by “Fact Sheets” for each lake. These fact sheets may be used as reference material for the lake associations. The second section discusses the water quality issues on a Town wide basis, identifies the pollutant(s) of concern and their source(s), and identifies reductions needed to meet restoration goals. The third and final section is a synthesis of management options and sets forth recommendations and priority actions for the Town of Lewisboro.

Plan published by EcoLogic, LLC of Cazenovia, NY.

January 21, 2014
by rob
Comments Off on Road Salt and Lake Health

Road Salt and Lake Health

Cross-posting from the Nextdoor Truesdale site:

I have been noticing large amounts of road salt in certain areas around the lake, and it made me wonder what sort of effects the salt can have on lake ecology. I started Googling, and discovered that road salt run-off can actually cause blue-green algae problems like the one we experienced last summer! Here are links to a couple of articles I found, but there are many more if you Google “road salt, algae“. -Ami N.

Here are some links to online articles that clearly state the problem with adding sodium chloride (NaCl, or ‘road salt’) to our water column. In short, when the water chemistry is changed, it can kill off green algae and phytoplanktons — which do not tolerate higher salt concentrations well — and leaves an opportunity for blue-green algae to flourish. This type of algae is less desirable, has a foul odor, and some species can be irritating to the skin or mildly toxic. Not something we want in our lake.

There are alternatives (check the New York Water article, linked below), or we can simply do without the rock salt treatment around the lake watershed.

http://poststar.com/news/local/to-improve-water-quality-in-lake-george-municipalities-try-new/article_35057674-6f7c-11e3-bd87-001a4bcf887a.html

Article excerpt: “The major threat to the lake from salt is a change in how the lower levels of the food web work. The rising sodium levels are shifting the lake’s chemical composition from being dominated by calcium carbonate to sodium chloride. That results in a shift in the phytoplankton population from one dominated by diatom algae to one dominated by blue-green algae.

Blue-green algae is much less nutritious than diatom for the rest of the food web, and some blue-green algae species are notorious for toxic blooms”

http://www.macalester.edu/academics/environmentalstudies/threerivers/studentprojects/LakesStreamsRiversFall09/RoadSaltPoster.pdf (pdf file brochure)

“Autotrophs, or primary producers that create their own food through chemo- or photosynthesis, such as algae and terrestrial plants are in particular danger of road salt. The presence of increased sodium chloride in an aquatic environment brings about an opportunity for invasive cyanobacteria to enter and dominate the inhabiting species. The cyanobacteria in question here are capable of withstanding the brackish conditions and they flourish accordingly, out-competing the other algae and smothering other organisms within the aquatic ecosystem.”

http://www.newyorkwater.org/downloadedarticles/environmentanimpact.cfm

http://www.loe.org/shows/segments.html?programID=13-P13-00010&segmentID=5

“Zooplankton…those are the tiny invertebrates that propel themselves around the water column, feeding on algae. If salt kills zooplankton, that’s not just going to mean more green scum on the water, it could also mean that larger predators, like the many species of fish that feed on zooplankton, go hungry.”

http://www.usatoday.com/story/news/nation/2013/02/23/road-salt-substitute/1939793/

“Chronic salt concentrations can damage algae that are food sources for insects that local fish eat; in high concentrations, it can kill amphibians and plants and leach into drinking wells.”

 

January 17, 2014
by rob
Comments Off on Lake Watershed Information

Lake Watershed Information

The lake associations commissioned a report on Truesdale Lake in 2001 that was done by Land-Tech Consulting. It has been over 13 years since the report publication and many new residents probably have never seen it.

I have excerpted a map of our lake’s watershed below as well as description of the watershed. The entire report is available here: http://truesdalelake.com/downloads/?did=25

The blue line in the map below represents the extent of our 2000+ acre watershed.

Truesdale Lake Watershed (blue line)

A watershed is a drainage area in which all land and water areas drain or flow toward a central collector, such as the lake. Precipitation falling on the watershed that does not infiltrate into the ground will flow over land to the central collector. The size of the contributing watershed largely determines the amount of water that enters the central collector, in this case, the lake.

This lake lies within the Waccabuc River Drainage Basin, which is a sub-basin of the Croton Regional Basin and the Hudson Major Basin. The portion of this watershed contributing surface runoff to the lake is large (2,380± acres, 963 ha), relative to the size of the lake (83 acres, 33.6 ha) (Figure 1). The majority of this watershed is located to the east of the lake and contains the Pumping Station Swamp. The size of the watershed creates a watershed to lake ratio of 28.7:1. The amount of rainfall draining to the lake was calculated using a runoff value of approximately 55 percent of precipitation (CT DEP 1982), an annual precipitation value of 47.5 inches per year (Soil Survey of Putnam and Westchester Counties, New York, 1994), and 68.6 cm (27 inches) per year of surface lake evaporation. Therefore, the net amount of rainfall that drains to the lake is large, (1.6 billion gallons) annually or an average daily flow of 4 million gallons per day. Thus, on an annual basis, the lake, with a volume of approximately 99,150,000 gallons, shows a moderate turnover rate (hydraulic residence time) of 16.2 times per year or every 22 days.

However, since the perennial watercourse is in the northeast portion of the lake and the discharge is at the northern tip of the lake, it is reasonable to assume that much of the water entering the lake from the perennial watercourse exits the system with little mixing of water in the southern lake basin. Therefore, the actual hydraulic residence time in the southern portion of the lake is expected to be longer than that stated above.

The report has additional information about biology, lake treatment, inflows, and management recommendations. Most of the information is still relevant today.

January 7, 2014
by rob
Comments Off on Ice Safety

Ice Safety

ICE SAFETY (this document is also available as a pdf download here)

Truesdale Lake freezes in the winter and is often perfect for sledding, skating, ice hockey, cross country skiing and just taking a beautiful winter walk. However one must never go out on any frozen body of water without knowing some rules of ice safety. Please discuss these safety tips with your children and emphasize their importance.

Before you go onto the ice:
1. Do not go alone. Always use the buddy system on the ice. Alcohol in your blood is dangerous because it impairs your judgement and increases chilling by bringing blood to the surface of the skin. At night carry a flashlight.
2. Check the thickness (see benchmarks below)
3. Look for the nearest yellow ice rescue ladders

Surviving an Icy Plunge into the Frigid Waters of Truesdale Lake

Whether you have fallen through thin ice or are trying to rescue someone who has, the most important thing to remember is: you have more time than you think.

What to do if you fall through the ice
Try not to panic. Call out for help only if you see someone. Otherwise, save your breath. The cold shock that makes you hyperventilate will subside within 1-3 minutes. The best thing to do is to get your breathing under control and keep above water. You are more likely to die from drowning than from hypothermia.

Remove any extraneous objects that will weigh you down. (skis, skates, etc.)

Try to get out from the direction that you came in. Place your hands and arms on the unbroken surface of the ice. You will only have 2-5 minutes before you lose the strength to pull yourself out.

Begin kicking your feet to get your body horizontal. Then, pull yourself along the ice until you are out of the hole. Be slow and deliberate to conserve your strength and body heat.

If the ice breaks, move forward and try again.

Once you are lying on the ice, DO NOT stand up. Roll away from the hole, then crawl following your footsteps back toward shore. Don’t stand until the hole is well behind you. You want to distribute your weight evenly over a wide area to prevent going through again.

If you can’t pull yourself out within 10 minutes from the time that you went in, cease all attempts. At this point, you need to extend the time period in which someone else could rescue you by conserving body heat.

The body loses heat much faster in water than it does in air, so get as much of your body out of the water as possible.

Keep your forearms flat and still on the ice. Hopefully, your clothing will freeze to the ice, possibly preventing you from going under, even if you become unconscious.

It is possible to survive for up to 2 hours before succumbing to hypothermia. In other words, if you stay composed and keep above water, you have almost a 2 hour window of opportunity to be rescued.

Do not panic.

What to do if you see someone fall through the ice?

Keep calm and try to keep the victim calm.

Assess the availability of extra help. If possible, call 911 or look for people in the vicinity.

If you are on the ice, DO NOT run up to the hole. If you are on shore, DO NOT run onto the ice. The last thing you want to do is become a second victim. Tell victim you are getting help. (reduces panic).

Use an item on shore to throw or extend to the victim that will allow you to pull them out of the water. (Rope, ladder, branch, extension cord, skis, jumper cable, etc.) You can also form a human chain with people lying flat on the ice to distribute the weight as evenly as possible. NOTE there are ladders with attached ropes located at several locations around Truesdale Lake. Hold on to the rope and push the ladder out toward the victim. Then once they grab it, pull the rope. The ladder will help distribute their weight and thinner ice should hold them up.

If the person can not hold the ladder, get a third person to hold the rope and the rescuer can carefully crawl out the ladder to grab the victim.

Once the victim is safely on shore, they may seem to be in relatively good condition. However, a potentially fatal condition called “after drop” can occur soon afterward. Cold blood that has been pooled in the body’s extremities starts to circulate again as the body warms up. At this point, the body begins to shiver violently in an attempt to raise the core temperature again.

Never rub the victim’s arms, hands, legs or feet, as this could cause or exacerbate the “after drop.”

Never give the victim alcohol or caffeinated products. They restrict the blood vessels and slow circulation.

If possible, exchange wet clothes for dry clothes, wrap the victim in a blanket and get the victim out of the elements.

Get an ambulance or rescue squad to the scene as fast as possible.

Is the ice thick enough? 
Better err on the side of caution (Note ice quality can vary in strength and thickness based on underwater currents, plant growth, water depth, waterfowl activity, and other factors.)

Black (new) ice is much stronger than white (snow or melted and refrozen) ice. Also even if the ice is strong in one place, there could be open water in another part of Truesdale. There have been winters when there was a strip of open water running across the lake all winter even though there was excellent ice skating north and south of it. There is usually open water and or thin ice near the inlets and along much of the eastern shore.

Minimum thickness (inches)....NY.........USACE........NH
1 person on foot ............2-3**.........2*.........4
group (single file)..........3**...........3*.........6
1 car (2 tons)...............7.5...........7.........7.5 (not allowed on Truesdale Lake)
  • number is for black (new) ice; recommends stay off old ice
    ** this site now says 2-3 inches of good clear ice

Sources for ice thickness and ice safety/rescue tips:
https://www.youtube.com/watch?v=ysnKtuUTt8k -really worth watching
USACE = U.S. Army Corps of Engineers - http://www.mvp-wc.usace.army.mil/ice/safety.html
NYS DEC - http://www.dec.ny.gov/outdoor/7733.html
NH Fish & Game Dept - http://www.wildnh.com/Outdoor_Recreation/ice_safety.html (download pdf)

Thanks to Mark, Barbara, and Alison for putting this information together. (This is a republished and updated article from the old lake website.)