2017 Map of Yale Dam

About this map

Yale Dam stands as the central engineering landmark along the Lewis River, anchoring the significant reservoir of Yale Lake as it straddles the boundary between Cowlitz and Clark counties. This 2017 topographic survey highlights a landscape defined by industrial water management and protected wilderness, with the Gifford-Pinchot National Forest covering the southern and eastern sectors. The terrain is notably vertical, rising from the lake shores toward prominent peaks such as Tumtum Mtn and Green Knob. A network of rural and forest roads, including Yale Village Rd and Saddle Rd, provides access to the dispersed properties and recreational areas surrounding Lake Merwin. Numerous drainages like Canyon Creek and Siouxon Creek carve through the heavily forested uplands, illustrating the complex hydrology of the Pacific Northwest's Cascade foothills.