1956 Map of Wilson Creek SE

About this map

Black Rock Coulee dominates this mid-1950s landscape in Washington's Grant County, showcasing a complex geological profile shaped by prehistoric glacial floods. The terrain is marked by sharp elevation changes and the distinctive Black Rock Lake, which sits as a centerpiece in the coulee floor. This survey, based on aerial photographs from 1954 and field-checked in 1956, identifies local navigation and surveying points including Marlin and the Marlin Azimuth. Sparse water sources are meticulously documented, highlighting a Spring and a Well amidst the dramatic contours. The map provides a high-resolution view of a region defined by its volcanic history and the scars of the Missoula Floods, offering a clear record of the area before modern land-use changes altered the local hydrology.