Stormwater Management Permit

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Stormwater Management Review – Engineering

Kendall County requires the engineering review of “development” to determine compliance with County ordinances including:

These ordinances can be viewed online or purchased at the Planning, Building, and Zoning Office. For further information, please contact PBZ Staff.

Development is broadly defined as any activity that has potential for adverse effect on adjacent properties due to changes in stormwater runoff. A permit may be needed for some activities that do not require a land use, subdivision or zoning petition. Please check with the County Planning Building & Zoning Office (630-553-4139) prior to any significant grading or filling on your property.

An engineering consulting firm assists the County with the review of engineering plans submitted by developers. Fees associated with the engineering review and consultation services are charged to the applicant/developer. The applicant/developer will be expected to open an escrow account with Kendall County at the time of application. The engineering review and consultation service fees are in addition to the application fee charged by the County. Fees vary by project considering each project has different potential impacts and each development plan is different. If there is any question on fees, please contact the County Planning, Building, and Zoning Office (630-553-4139).

Highlights of Stormwater Management Regulations

  • Authority: The County has statutory authority to regulate Stormwater Management and governing the location, width, course, and release rate of all stormwater runoff channels, streams and basins in the County.
  • Objectives: To protect upstream and downstream land owners from adverse impact of development activities. These impacts relate to stormwater quantity (flooding), soil erosion control, and floodplain and wetland protection.
  • Exemptions & Limitations: Most farming activities outside the floodplain and wetlands are exempt from the ordinance. A farming activity that results in a total of more than 43,560 square feet of impervious surfaces (old & new) will require a permit. Many projects, such as ponds, berms, shore stabilization where more than 43,500 square feet of ground is disturbed or three feet of fill is placed, require a Stormwater Permit. Some exceptions include driveways, some swimming pools, utilities, and public roadway projects.
  • Procedures: The owner should do their best to read and understand the requirements of the ordinance prior to contacting the County and preparing an application. If the project involves impacts to floodplain or wetlands it may be necessary to seek guidance from a design professional. We encourage early communication to help determine permit requirements. A pre-application meeting is encouraged. In order for the meeting to be as productive as possible we recommend you bring an draft application, the engineering consultants fee deposit form, along with two copies of a concept grading plans that includes at a minimum, a location map, the extent of disturbance and a description of the change in ground elevation proposed. We recommend the applicant utilize the County GIS data in preparing initial project concepts County staff, with assistance from the County’s engineering firm, will determine if additional data is needed and whether other agency permits/consultation is required.

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