1923 Map of Monocline Ridge

About this map

Monocline Ridge dominates this 1921 survey of the Fresno County landscape, revealing a period of early infrastructure and geographic education in the California foothills. The map captures the remote Tumey Gulch School positioned near the head of a winding drainage, serving as a focal point for a sparse rural population. The presence of an Oil Pumping Station in the eastern flats signals the region's developing petroleum industry, connected to the wider world by a network of unimproved roads and survey tracks. Surveyed by E.T.Walker, the topography illustrates the transition from the steep, dissected terrain of the Tumey Hills to the gentler alluvial slopes where ephemeral watercourses like Tumey Gulch lose their definition. This sheet provides a detailed record of land ownership boundaries and elevation before modern agricultural and industrial expansion reshaped the valley floor.