2023 Map of National City

About this map

National City serves as the primary hub in this landscape where Iosco and Arenac counties meet. The area is defined by an intricate network of managed waterways and wetlands, including Messer Swamp and the Alabaster Swamp. The East Branch Au Gres River meanders through the terrain, accompanied by numerous historic agricultural and roadside conduits such as the Sherritt Drain, McMullen Drain, and Parent Drain. Smaller settlements like McIvor and Turtle are linked by a grid of named rural routes, reflecting a history of land partitioning and local drainage engineering. This 2023 survey documents the modern state of the Au Gres River basin, showing the persistence of traditional family-named road systems and the specialized Old Channel East Branch Au Gres River, illustrating how the region has been meticulously drained for forestry or farm use.