Title
Tinley Creek Stabilization - September 2020 Update
History
In November of 2004, the Illinois State Legislature granted the Metropolitan Water Reclamation District (MWRD) of Greater Chicago the authority for general supervision of stormwater management in Cook County. The legislative act granting the authority required the preparation and adoption of a countywide stormwater management plan. In February of 2007, the MWRD's Board of Commissioners adopted the Cook County Stormwater Management Plan (CCSMP) by ordinance. The CCSMP was a high-level organizational plan and the first step in the development of the MWRD's countywide stormwater management program. Based on the CCSMP, the MWRD then studied each of the six watersheds in Cook County and developed Detailed Watershed Plans (DWP), which address regional stormwater problems in Cook County. The primary objectives of the DWPs were to document stormwater problem areas, evaluate existing watershed conditions using industry accepted hydrologic and hydraulic models, produce flow, stage, frequency, and duration information about flood events along regional waterways, and estimate damages associated with regional stormwater problems. The Cal-Sag DWP identified four potential projects within the Tinley Creek portion of the watershed. In 2010, feasibility/preliminary studies were prepared for each of the projects to determine the impact and benefits of the projects. Two of those projects are located in Orland Park and were selected for implementation based on the results of the preliminary analysis. Details for each project are provided below:
Project TICR-7 (Tinley Creek)
Description: Stabilize approximately 2,200 linear feet (LF) of Tinley Creek using a combination of retaining walls and bioengineering techniques. Estimated Construction Cost (2014 Dollars): $1,437,510
Project TICR-8 (Tinley Creek)
Description: Stabilize approximately 1,803 LF of Tinley Creek using a combination of retaining walls and bioenginee...
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