Report to: Development Services Committee Report Date: June 2, 2009

SUBJECT: West Thornhill Stormwater Flood Remediation Class EA Study

PREPARED BY: Yanli Xu, Senior Stormwater Management Engineer, ext.2894

Phoebe Fu, Manager, Capital of Right-of -Way, ext.3010

RECOMMENDATION:

1) THAT the report entitled “West Thornhill Stormwater Remediation Class EA Study – Project Update” be received;

2) AND THAT staff be directed to hold Public Information Centre (PIC) No. 2 and present the draft preferred alternative solution to increase the level of flood protection in West Thornhill Area;

3) AND THAT staff report back to General Committee with final recommendations on June 22, 2009.

4) And that Staff be authorized and directed to do all things necessary to give effect to this resolution.

EXECUTIVE SUMMARY:

Not applicable

1. Purpose 2. Background 3. Discussion 4. Financial

5. Others (HR, Strategic, Affected Units) 6. Attachment(s)

PURPOSE:

The purpose of this report is to obtain Council’s authorization to host Public Information Meeting (PIC) No. 2 to present the draft preferred alternative solution of the West Thornhill Stormwater Flood Remediation Class EA Study.

BACKGROUND:

On Friday afternoon, August 19, 2005, the Town of Markham experienced a rainstorm event that dropped more than 120 millimetre (5-inches) rainfall in its three hour duration. Significant surface and basement flooding occurred in some areas of West Thornhill.

In response, Markham initiated in February 2008, a Municipal Class B Environmental Assessment (Class EA) study to assess the existing stormwater system conditions and the alternative solutions to improve the stormwater system performance in West Thornhill to an acceptable level of protection.

OPTIONS/ DISCUSSION:

Refer to the attached presentation entitled “West Thornhill Stormwater Flood Remediation Class EA Study Project Update” by Asset Management Department at Special Development Services Committee Meeting June 2, 2009.

FINANCIAL CONSIDERATIONS AND TEMPLATE: (external link)

Not applicable

HUMAN RESOURCES CONSIDERATIONS

Not applicable

ALIGNMENT WITH STRATEGIC PRIORITIES:

This report is consistent with the Building Markham’s Future Together strategic priority on the “Environment” as it considers sustainability on the built environment.

BUSINESS UNITS CONSULTED AND AFFECTED:

Engineering, Operations and Finance Departments has been consulted.

RECOMMENDED

BY: ________________________ ________________________

Steve Andrews Brenda Librecz

Director, Asset Management Commissioner, Community and Fire Services

ATTACHMENTS:

Presentation “West Thornhill Stormwater Flood Remediation Class EA Study Project Update” by Asset Management Department for Special Development Services Committee Meeting June 2, 2009