1950 Map of Alameda Flat

About this map

The Columbia River serves as a dominant geographic divider on this mid-century survey, separating Okanogan and Douglas counties and defining the southern border of the Colville Indian Reservation. The river's powerful character is evident in the marking of Mah-kin Rapids, Nespelem Rapids, and Equilibrium Rapids, capturing the waterway before modern engineering fully transformed its flow. Along the northern banks, the landscape of the reservation is marked by mining activity near Hobo Hill, including the Anchor Mine, Sailor Boy Mine, and Apache Mine.