Drainage summary
Simpson precinct, Johnson County, Illinois is listed as a county subdivision. For drainage, the page currently shows stormwater segments: ~ 14, ditches and channels: ~ 11, low points: ~ 5, road shoulders: ~ 10, residents covered: 0. The figures use the available U.S. geography, population, housing and local-structure data for this place.
Calculated from U.S. geography, population and local structure. Public messages are moderated before publication.