The Town of Cicero has enacted a Stormwater Ordinance in order to establish minimum stormwater management requirements and controls to protect and safeguard the general health, safety, and welfare of the public residing in watersheds within this jurisdiction. The Town of Cicero is the permitting authority for all land disturbing activities and requires the land owner to maintain all on-site stormwater control facilities and all open space areas (e.g. parks or “green” areas) required by the approved stormwater control plan. The Town of Cicero will only provide construction permits to projects that establish a plan to manage stormwater runoff occurring during the construction process. The Town of Cicero, under the NPDES program, also has the authority to inspect properties for noncompliance and can issue a notice of violation (NOV) for any deficiency or infraction onsite. Property owners are responsible for the maintenance of any stormwater facilities or practices located on the property. The Town of Cicero has the authority to inspect stormwater facilities and practices in order to ascertain that they are properly maintained and functioning.
(a) A combination of stormwater detention and controlled release rates for stormwater runoff is required for all new construction, additions to existing structures or appurtenances, and any additional development or change or use which will increase the volume of stormwater runoff over that which existed prior to the proposed development. Such detention and release rate shall be calculated in accordance with the procedures accepted by the Metropolitan Water Reclamation District of Greater Chicago and from time to time amended. Each development under this article shall discharge stormwater at the specified release rate into an existing or proposed natural stormwater outlet. All plans, calculations and specifications shall be subject to the review of the town engineer and shall receive his approval prior to commencement of any construction.
(b) The release rate of stormwater runoff for new construction shall not exceed the volume of stormwater that would run off the entire subject site in its natural undeveloped state for a three-year rainfall intensity. For additions or change in use, stormwater detention will only be required for that portion of a parcel being developed and increasing the volume of stormwater runoff greater than the land in its natural, undeveloped state.
(c) The live detention storage to be provided under this article will be calculated on the basis of a 100-year frequency rainfall as published by the National Weather Service for this area and will have sufficient volume to handle the runoff for any and all durations from the parcel subject to the detention under this article.