2* Engineers VI ui•so•g• INFRASTRUCTURE CONSTRUCTORS 5 Background Review

Key stakeholder agencies were consulted to inform the analysis and design of the Marentette Mangin Drain SWM Plan. Several sub-watershed studies have been completed in and around the study area, including technical studies completed in support of the Environmental Assessment. The following sections provide a brief overview of the technical studies and agency feedback received in preparation for this study.

5.1

DRIC Environmental Assessment

An Ontario Environmental Assessment Report (EA Report) was prepared as part of the DRIC study. The EA Report documents the formal federal and provincial environmental assessment processes undertaken for a new or expanded Detroit River International Crossing; and the selection of the Technically and Environmentally Preferred Alternative (TEPA).

Chapters 4, 10 and 11 of the Ontario EA Report were reviewed in detail to inform decisions in the design of the proposed Marentette Mangin Drain SWM plan. Chapter 4 describes the existing conditions relative to land use, socio-economic environment and natural environment. Chapter 10 of the EA Report contains details on the environmental effects and proposed mitigation measures of the Recommended Plan and commitments to future work. Chapter 11 outlines commitments to consultation, compliance monitoring and permits/approvals that must be obtained during future stages of the project.

5.2

The Windsor-Essex Parkway Preliminary Design Report

The Preliminary Design Report (PDR) completed by URS was issued in November 2009. The PDR expands on Chapter 9 of the EA report (Description of the Recommended Plan) and provides details on the preliminary design of the Windsor-Essex Parkway. As part of the preliminary design, a preliminary stormwater management plan was developed by URS and is outlined in The Windsor-Essex Parkway Stormwater Management Report (November 2009).

5.3

The Windsor-Essex Parkway Stormwater Management Report

The Windsor-Essex Parkway Stormwater Management Report (URS; November 2009) outlines the preliminary SWM Plan that was developed for The Parkway to address the highway drainage and the potential impacts of The Parkway on the drains and drain crossings. The Report included the preliminary design of several drainage elements and, in conjunction with the EA Report, established the basis for the detailed design of the Windsor-Essex Parkway. The stormwater management criteria are summarized as follows:

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