Being a By-law to prohibit or regulate any alteration to the grade (topography) and drainage of land within the Town of Whitby to limit interference and damage to watercourses, drainage systems and water supplies, to regulate unanticipated grading and drainage alterations as a result of Infill Developments, to limit the use of improper fill and potential environmental impacts, to limit erosion arising from such changes and to limit impacts on neighboring and surrounding properties.