April 12, 2013

Mayor and Council
Corporation of the City of Windsor
360 City Hall Square West
Windsor, Ontario
N9A 6S1

Attention: Ms. Anna Godo, P. Eng.

Drainage Superintendent

Drain Improvements to the

MARENTETTE MANGIN DRAIN

As part of the Windsor-Essex Parkway City of Windsor

Dear Ms. Godo:

Instruction

We have reviewed the proposed drainage improvements contained within the Marentette Mangin Drain Stormwater Management Report as prepared by the Parkway Infrastructure Engineers (PIE), and have made an examination of the area for improvement to the Marentette Mangin Drain in the City of Windsor. Instructions were initiated by a request from the Windsor-Essex Mobility Group (WEMG), acting as agents for the Ministry of Transportation (MTO) as part of the infrastructure construction and development of the Windsor-Essex Parkway.

The proposed work as it affects the Marentette Mangin Drain is consistent with the hydraulic analysis and design prepared by PIE. We find that if the work is carried out in accordance with the drawings and specifications, that the portion of the Marentette Mangin Drain being improved can proceed without adversely affecting any person(s) and / or property. All of the works recommended shall be at the cost of the MTO (Road Authority) and the entirety of the proposed work is on lands solely under the jurisdiction of the City of Windsor or the Ministry of Transportation. We hereby recommend that the improvements, as described in this letter, may proceed as set out in our written opinion in accordance with Section 77(3) of the Drainage Act. As such, a formal report under the Drainage Act is not required.

Watershed Description

The Marentette Mangin Drain is a regulated municipal drain and lies within the Turkey Creek Watershed. The headwaters of the Drain are located on the west side of Huron Church Road, approximately 150 m south of Bethlehem Avenue. The Drain flows southwest, and then southerly to a storm sewer inlet immediately west of the Lambton Street Cul-de-Sac. The total contributing area to the inlet is approximately 33 ha. The current land uses in the Marentette Mangin Drain Sub-Watershed consist of residential developments, improved land and fragmented woodlots.

The Marentette Mangin Drain is under the jurisdiction of the Essex Region Conservation Authority (ERCA) with respect to hydraulic performance and floodplain management, and the Ontario Ministry of