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Eagle Lake Plant Surveys Page
Surveys of Eagle Lake that studied either individually or in combination the location and distribution of native vegetation or the locations and distributions of the invasive Eurasian Water Milfoil. A few documents relate more to the herbivore activity or the management of the milfoil but are included here as they directly relate to plants.

The driving force behind completing these surveys was that in the late 1970's a "new to the lake" plant was observed identified. Lake residents who observed this plant saw a few dense and spreading beds of what, to them, did not look like native vegetation. Samples of this plant were sent out for official identification. Since early taxonomy books did not include this later to be identified invasive plant, Eurasian Water Milfoil, it enjoyed growing and spreading for many years while being misidentified. The plant was officially identified in the late 1980's; by this time there were several large dense beds of plants spread throughout the lake. See maps of the 1989 and 1994 distribution for more information.

The documents History of Milfoil (2005 - 2007) and History of Milfoil (1970 - 2005) summarizes some of the thousands of tasks that members of the ELPOI completed over the past years to gain control over this invasive. In 2008 the ELPOI with support from the towns of Ticonderoga and Crown Point moved closer to their goal of control when awarded a NYS Invasive Species Grant.
Additional information related to Eagle Lake's environmental management (milfoil) is listed below.

2021/2022/2023 Milfoil Survey Maps- from Adirondack Research, ELPOI Volunteers, and SUNY ESF

2011-12-2018 APIPP Survey- Adirondack Park Invasive Plant Program and Adirondack Research's 2018 Aquatic Invasive Species Survey Report. Pictures from doing the survey are also available.

7-9-2015 Plant Survey of Eagle Lake- part of the Adirondack Aquatic Regional Response Team 2015 Report completed under direction of the Adirondack Watershed Institute, Paul Smith's College.

10-22-2011 Eagle Lake Plant Survey (Ti Bay)- partial lake survey of Ti Bay by Amy Calkins.

2009, 2011- Ongoing Underwater "Target" Photographic Site Specific Plant Survey- Plant survey using a series of underwater photographs to show native plants and milfoil distributions within a "Target Location" at several specific sites in Eagle Lake. The methodology is based on a type of Vermont DEC plant survey.

2008- November Overlay Map: for 2008-9-4 Tier III plant survey and 2003-Summer GPS survey of milfoil distribution and patch size. A look at comparing survey sites/distribution of patch size.

9-4-2008 Tier III Aquatic Macrophyte Survey: Allied Biological; a partial lake survey to identify aquatic plants within a quarter mile of proposed herbicide treatment area (20mb). For photos of the survey taking place click here.

6-17-2008 Email: from the NY National Heritage Program staff providing data on 1988 Eagle Lake's Crown Point Bay plant survey locating the plant Potamogeton Alpinus see full survey at 1998-8-3 National Heritage Plant Identification Survey.

7-3-2006 Pictorial Guide to Aquatic Plants in Eagle Lake: M. Tiedemann, compiled from names listed on prior plant surveys; document prepared to help Eagle Lake milfoil removal divers identify plants for the protection of natives species during the milfoil removal process.

2003-Summer GPS Survey of Milfoil in Eagle Lake Page: M. Tiedemann, Baseline study documenting the location and size of the largest and densest beds of Eurasian Watermilfoil in Eagle Lake (survey data, maps, and results).

2001 US Army Corps of Engineers Preliminary Restoration Plan: A report for an Aquatic Ecosystem Restoration based on 2001-7-2 site visit. The determination was that milfoil is a problem but that a Section 206 program was not appropriate for Eagle Lake.

7-2-2001 Study for Herbivore Activity on milfoil through out Eagle Lake: Dr. R. Johnson, Cornell University. Site visit follow up data to a 2000- October limited milfoil plant observation to identify herbivores existing in Eagle Lake.

2000-October: Limited milfoil plant observation to identify herbivores existing in Eagle Lake Dr. R. Johnson Cornell University. Based on verbal feedback "significant Acentria Moth and Weevil activity identified, follow up study warranted."

2000-January DRAFT Supplement Environmental Impact Study (SEIS): A comprehensive management assessment comparing methods for the control of eurasian water milfoil in Eagle Lake with Flouridone (Sonar). Prepared for the NYS DEC by ENSR (11mb)

1998-December Baseline Aquatic Plant Monitoring Survey: A pre-treatment survey for a Sonar demonstration project, Darrin Fresh Water Institute (DFWI). A survey completed by assessment of plants in an east and west transect sampling- transects were monitored 1996-1998.

1996-1998: grid/transect survey plant survey raw data for final report. (see 1998-December Baseline Aquatic Plant Monitoring Survey for the full report).

10-25-1994, NYS DEC Follow Up: Lake plant survey 26 Sept 1994 by Sutherland and Eichler a follow up to the DFWI plant survey dated 13 September 1989, includes 1994 and 1989 milfoil distribution maps.

9-22-1993 Management Options/Plant Survey- D. Pullman Aquest Corp a professional opinion for control of milfoil using 2,4-D or Sonar.

1989 Darrin Fresh Water Institute Aquatic Plant Survey: A report to the Eagle Lake Homeowner Association describing abundance/distribution of native and milfoil plants in Eagle Lake (Data was collected September 1989- Report was released April 1990. The report is often referred to by either date).

8-3-1988 National Heritage Plant Identification Survey (4.6mb): of Eagle Lake' Crown Point Bay, L. Taggett, survey reports finding samples of Potamogeton Alpinus a plant listed on the NYS Rare/Threatened/Endangered Plant List

1932- DEC Plant Survey: there is a reference in the 1989 DFWI Plant Survey to a plant survey having been completed at this time. No data is currently available.

The following information relates to aquatic plants in general and provides access to: NYS Rare Threatened and Endangered plant list, how to complete/conduct "Tier Plant Surveys" using a rake toss, as well as guides for identifying native and or invasive plants.