2015 Map of Thomas Reservoir

Surveyed in the 21st century, the map illustrates the complex hydrography of the region's southern drainages, where Rose Cr and Little Rose Cr descend through the western sections near Pickett Cr. The lack of named roads or established settlements emphasizes the character of this territory as a managed watershed and natural habitat, organized by the township and range lines of t49n r103w and surrounding sections.