1978 Map of Mount Locke

About this map

The McDonald Observatory sits atop Mount Locke, dominating this high-altitude landscape of the Davis Mountains as it appeared in the late 1970s. This survey records a complex network of water management features essential for ranching and scientific operations in an arid climate, including Limpia Windmill, Salcido Windmill, and numerous catchment basins like Prude Tank and Agua Blanca Tank. The topography is defined by the massive spine of Gavina Ridge and the deep incisions of Madera Canyon, where the Madera Canyon Roadside Park provided a stopping point for travelers along the mountain roads. Notable natural water sources such as Pine Peak Spring and Tuly Spring are documented alongside a web of jeep trails that navigate the high gaps and peaks, reflecting the region's historical reliance on seasonal springs and groundwater for both livestock and the growing astronomical research community.