Which tributary of the Saint John River did Chamberlain Lake drained into
Allagash River The Allagash River is a tributary of the Saint John River, approximately 65 mi long, in northern Maine in the United States. It drains in a remote and scenic area of wilderness in the Maine North Woods north of Mount Katahdin. The name "Allagash" comes from the Penobscot word "/walakéskʸihtəkʸ/", meaning "bark stream".
Lake Whittlesey Lake Whittlesey was a proglacial lake that was an ancestor of present-day Lake Erie. It formed about 14,000 years ago. As the Erie Lobe of the Wisconsin Glacier retreated at the end of the last ice age, it left melt-water in a previously-existing depression area that was the valley of an eastward-flowing river known as the Erigan River that probably emptied into the Atlantic Ocean following the route of today's Saint Lawrence River. The lake stood at 735 ft to 740 ft above sea level. The remanent beach is not horizontal as there is a ‘hinge line’ southwest of a line from Ashtabula, Ohio, through the middle part of Lake St. Clair. The hinge line is where the horizontal beaches of the lake have been warped upwards towards the north by the isostatic rebound as the weight of the ice sheet was removed from the land. The rise is 60 ft north into Michigan and the Ubly outlet. The current altitude of the outlet is 800 ft above sea level. Where the outlet entered the Second Lake Saginaw at Cass City the elevation is 740 ft above sea level.