Lake Winnemaug, Watertown
Upper Guilford Lake Species Map

(1.19 MB, .pdf format*)

   Winnemaug Lake is an 112.9-acre body of water that is artificially impounded by a masonry and earthen dam.  It is bounded by a road on its eastern shore.   The shoreline is heavily settled with mostly summer cottages with the exception of the southern end.  The maximum depth is 16.5 feet  (5 m) and the mean depth is 7.9 feet (2.5 m). 

   Our survey of aquatic vegetation in September 2005 found snailseed pondweed (Potamogeton bicupulatus) was the most widespread species,. It was found mostly in the southern end of the lake.  Most vegetation was restricted to the southwestern cove in depths less than 3 feet.   The invasive Najas minor was also found there.   Small patches of Charaphyte and arrowhead ( Sagittaria sp.) were observed in the northwestern part of the lake, but nowhere else. 

Find Common Plant Names

(65 KB, .pdf format*)

Species recorded in our 2005 survey of Winnemaug Lake. Click on plant to view herbarium mount. (invasive species in bold)


Elatine minima

Eleocharis sp.

Najas flexilis

Najas minor

Potamogeton bicupulatus

Sagittaria sp.

Vallisneria americana

*NOTE: Some of these documents are provided in Adobe® Acrobat® (.pdf) format. In order to view or print these documents you need Adobe® Reader®.  If you do not have Adobe® Reader®, click the "Get Adobe® Reader®" image for a free copy

Get Adobe Reader