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Upper Bolton Lake - Coventry, CT 

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2005 Aquatic Plant Survey Map of Upper Bolton Lake

(1.5 MB, .pdf format*)

Transect Data (236 KB, .pdf format*)  | Water Data

   Upper Bolton Lake is 50 acres, and is the smallest of the three Bolton Lakes.  Its maximum depth is 7.5 feet and its mean depth is 3 feet. Upper Bolton Lake feeds into Middle Bolton Lake through a culvert under the road on its southern shore.  Surrounded mostly by wetland, there is no residential development on the shoreline.  Public access is available only at the state-owned boat ramp on the southern shore and boat motors are limited to 6hp.

   The CAES IAPP July 2005 survey, revealed large amounts of vegetation in the entire lake. The southern, and deepest, portion of the lake was covered mainly by Brasenia schreberi and Utricularia vulgaris .  Along the west side there were numerous patches of Nuphar variegata, Nymphaea odorata, Brasenia schreberi, Najas flexilis, Potamogeton epihydrus, Potamogeton pulcher, Potamogeton pusillus, Utricularia purpurea, and to a lesser extent, Potamogeton oakesianus. There was a large patch of Elodea nuttallii, and several large patches of Eleocharis acicularis, Potamogeton pusillus and Nymphaea odorata located in the southern portion of the lake, as well as the invasive Myriophyllum heterophyllum.  The western side of the lake had several large patches of Nymphaea odorata and Nuphar variegata, and smaller patches of Potamogeton pulcher, Eriocaulon aquaticum and Potamogeton pusillus.  The northern part of the lake was also covered in vegetation with Pontederia cordata as the dominant species, and contained large patches of Brasenia schreberi, Nuphar variegata, Nymphaea odorata and Utricularia vulgaris.

Find Common Plant Names

(65 KB, .pdf format*)

Species recorded in our 2005 survey of Upper Bolton Lake. Click plant to view herbarium mount (invasives in bold).

Brasenia schreberi

Eleocharis acicularis

Elodea nuttallii

Eriocaulon aquaticum

Myriophyllum heterophyllum

Najas flexilis

Nuphar variegata

Nymphaea odorata

Pontederia cordata

Potamogeton epihydrus

Potamogeton oakesianus

Potamogeton pulcher

Potamogeton pusillus

Utricularia purpurea

Utricularia macrorhiza (FKA vulgaris)


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