1978 Map of Pemadumcook Lake

About this map

Pemadumcook Lake dominates this late-1970s orthophotograph, serving as a massive hydraulic hub in the Maine wilderness. This imagery, captured by the Geological Survey, reveals the intricate shoreline of one of the state's largest water bodies before modern shoreline development changed the character of these remote reaches. To the northeast, the Penobscot River flows through the W Branch, connecting Ambajejus Lake into the broader river system. The map provides a stark visual record of the timber-rich landscape, showing the dense forest cover surrounding North Twin Lake and South Twin Lake. Topographical elevation is represented through the shadowed forms of Potaywadjo Ridge, while the drainage patterns of Cooper Brook feed into the Jo-Mary Lake and Middle Jo-Mary Lake chain, illustrating the primitive water-interconnectivity of the Piscataquis region.