The full volume, with maps covering the entire length of the canal can be found at Connecticut State Library or in the Digital Collections

Connecticut. Commissioners to Survey and Lay Out the Farmington Canal. “Map of the Farmington Canal .” Connecticut State Library, State Archives, RG 000, Classified Archives, call number 912.74 C72. http://cslib.cdmhost.com/cdm/ref/collection/p4005coll1/id/518