Mount Prospect, IL Environmental Rules: Erosion Control (2026)

Section 16.703 of the Mount Prospect Village Code sits in Article VII, Grading, Excavation, and Erosion, Sediment and Dust Control. Subsection A applies the plan requirement to all developments, whether public or private. Subsection B ties approval to performance: the plat or plan must show that sediment will not be transported off the site by a storm event of 10-year frequency or less.

Subsection B lists eight principles for all development activity. Development must follow the topography and soils to create the least potential for erosion, steep slopes with high cuts and fills are avoided wherever possible, and natural vegetation is retained and protected. The smallest practical area of land is exposed for the shortest practical time. Sediment basins, debris basins, desilting basins, or silt traps or filters must be installed and maintained. Drainageways have to be designed so final gradients and discharge velocities create no additional erosion, and permanent vegetation and structures go in as soon as practical.

Subsection C spells out what the plan must contain. It needs a vicinity map with the boundary line, approximate acreage, a legend and a scale. The site plan shows existing topography of the site and adjacent land within approximately one hundred feet of the boundaries, drawn at no greater than two foot contour intervals, along with buildings, utilities, water bodies, floodplains and drainage facilities. The control plan itself covers measures for all phases of construction and permanently afterward, maintenance provisions with cost estimates, and the person or entity legally responsible for maintenance after development. A phasing schedule must give the expected clearing start date, how long cleared areas stay exposed, and the sequence of temporary sediment controls, storm drainage, paving and permanent vegetative cover.

Submissions must follow the manual "Procedures And Standards For Soil Erosion And Sedimentation Control In Illinois," adopted by the North Cook County soil and water conservation district and incorporated by reference. The Village can waive specific content requirements when the information submitted is sufficient to show compliance.

Section 16.704 requires a water wagon or other acceptable means to control dust, bars use of fire hydrants as a water source, and requires streets used by the developer, contractors or suppliers to be kept free of debris, dirt, dust and mud and left clean at the end of each day's work. Section 16.705 prohibits berms on Village-owned right of way and on drainage and utility easements.