2021 Map of Saint Mary

Hydrology plays a central role in the geography here, with numerous named drainages such as Saunders Cr, Silver Cr, and Deer Cr feeding into the larger river system. The presence of the Heusman Reservoir suggests the local importance of water management and irrigation in this agricultural corridor. The map's detailed section lines and rural road designations, such as 734 Rd and 733 Rd, illustrate the enduring Jeffersonian grid that dictates land ownership and movement across the Nebraska plains.