There are lots of ways groups form in order to tackle shared interests. “In 1955, the Minnesota Legislature authorized the creation of watersheds through the Watershed Act. The intent of the Act was to develop water management policies and plans on a watershed basis, because water does not follow political boundaries.”
Water flows in the direction of the lowest point. If your neighbor’s lot sits higher than yours, then more than likely you will deal with the drainage that flows following a storm. For that reason, people in a shared drainage system collaborate to be sure adverse effects are tackled. These generally include land use planning, flood control and conservation projects.

From an analysis point of view, the watersheds are interesting as they are independent of standard governance structures. Water crosses country lines, meanders between cities, and flows around carefully surveyed property lines. They can group people and their properties over vast plains.
But where is the value in the grouping? Mainly in the flood zone analysis. Inundation and water tables effect construction prospects and insurance issues.
