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File #: 17-0170    Version: 1
Type: Report Status: Filed
File created: 2/7/2017 In control: Stormwater Management Committee
On agenda: 2/16/2017 Final action: 2/16/2017
Title: Report on Green Infrastructure, Detention, and Compensatory Storage Volumes Required by the Watershed Management Ordinance (As Revised)
Attachments: 1. Quarterly Reporting Table

TRANSMITTAL LETTER FOR BOARD MEETING OF FEBRUARY 16, 2017

 

COMMITTEE ON STORMWATER MANAGEMENT

 

Mr. David St. Pierre, Executive Director

 

Title

Report on Green Infrastructure, Detention, and Compensatory Storage Volumes Required by the Watershed Management Ordinance (As Revised)

Body

 

Dear Sir:

 

The Watershed Management Ordinance (WMO) regulates sewer construction within the District’s service area and development within suburban Cook County.  It provides uniform stormwater management regulations to prevent future development projects from exacerbating flooding and protect environmentally sensitive areas.  Green infrastructure (GI) is installed to comply with the stormwater management requirement of capturing one inch of stormwater runoff from all impervious surfaces of the development.  Detention requirements have been enhanced by the WMO as compared to the previous requirements under the Sewer Permit Ordinance, and compensatory storage is required to mitigate development impacting the floodplain.

 

When a WMO permit is required, the development must comply with the stormwater management provisions of the WMO.   The attached table includes the number of permits issued per quarter since the WMO became effective.  It also summarizes the development area, volume captured by GI, locally-provided detention, and compensatory storage.  The total for each year and running total are also provided.  This table will be updated at the end of each quarter and transmitted for your information.

 

Respectfully Submitted, Catherine A. O’Connor, Director of Engineering, WSS:JK

 

Attachment