1972 Map of Nichol Flat

About this map

Portlock Ranch stands as the primary human landmark in this corner of Owyhee County during the early 1970s. The landscape is defined by the high, dry plateau of Nichol Flat, where a complex network of seasonal water management is visible through numerous impoundments such as Lower Nichol Flat Reservoir and Harris Creek Reservoir. This environment highlights the critical importance of water rights and ranching infrastructure in the high desert, as seen in the frequent Spring and Well markers scattered across the terrain.