Basement Flooding Improvement Program

Town Hall Meeting, Ward 33

May 21, 2009

Background

• Major flooding reported in August 19, 2005

• City workplan to address areas of chronic flooding; 31 study areas

• Study Areas 29 and 30 among first to be examined

• Studies were completed in August 2008

• Our sewer system performs as designed (for “normal” storm conditions)

• During extreme storms – sanitary sewer system is overloaded; surface flooding on private property

• Many older developed areas do not have proper overland flow routes; resulting in low points with no outlet for water

City has adopted a higher level of protection against basement flooding for both the sanitary & storm

sewer systems

Our Findings

Overland Flow PathsC

actus Ave.

Homewood Ave.

Patricia Ave.

Peck

ham

Ave

.

General Surface

Patricia Ave.

Cactus A

ve.

Overland Flow PathsC

actus Ave.

Homewood Ave.

Patricia Ave.

Peck

ham

Ave

.

Lot Level Controls

• Downspout disconnection

• Proper lot grading

• Installation of backwater valves on sanitary lateral

• Capping off storm laterals & installation of sump pump

• Repair cracks in foundation walls & sealing window wells

• Covering basement stairwell

• Disconnecting “illegal” sanitary sewer connections

Need homeowners to help take action!

Recommended Solutions

Surface Flow Controls

• Catchbasin Inlet Control

• Increased No. of Catchbasins

• Sealing Maintenance Hole Covers

• Flow Path Diversion

Recommended Solutions

Recommended Solutions

Pipe Controls (Storm and Sanitary)

• Increasing Sewer Pipe Size

• Adding new sewers (twinning)

Recommended Solutions

Storage for Sanitary and Storm

• Underground tanks within the sewer system

• Underground storage tank:

- Old Sheppard Park, Dallington Park, Pinto Park

• Dry pond at Muirhead Park

• Over 300 improvement works

• Five-year timeframe for investing more than $200 million

• Work will be constructed according to the priority approved by City Council

– Highest priority is for sanitary sewer improvements

– Storm system improvements where the cost is $25,000 or less per benefiting property will be prioritized

– Projects greater than $25,000 will be combined with other City infrastructure renewal programs

City-wide Implementation Plan

Cost of Improvements(Study Areas 14, 28, 29 & 30 only)

Total Cost: $272 million; $195 million for Priority Areas

Ward 33: 17 works; $52 million

Sanitary Sewer Upgrades 16 works $6 million

Sanitary Storage Tanks 13 works $14 million

Storm Drainage Upgrades 261 works $163 million$100 million (priority areas)

Storm Sewer Storage Facilities

10 works $47 million $33 million (priority areas)

Lot level controls $42 million

Our 2009 Workplan

• Since last year, we have been working on:– Developing a schedule for all the works– Coordinating with various agencies– Surveying the sites– Developing detailed engineering plans

• Contractors to be hired in fall 2009 to begin work

• Sanitary sewers will be replaced along:– Shaunghnessy Blvd, Leith Hill Rd, Esterbrook AveShaunghnessy Blvd, Leith Hill Rd, Esterbrook Ave

• Storm sewers replaced along:– Edmonton Rd., Ipswich CresEdmonton Rd., Ipswich Cres

• Pre-engineering underway for storm sewer replacement along: – Seneca Hill Dr, Silas Hill Dr, Van Horne Ave, Oshea Cres– Corning Rd and Lesgay Cres– Grove Park Cres and Glentworth Rd– Shippigan Cres and Dallington Dr– Axsmith Cres– Deerford Rd and Hobart Dr– Gleneagle Cres, Sandbour Cres, Baroness Cres– Gleneagle Cres, Allenbury Cres, Kingslake, Lisburn, Kempsell, Houston– Faye Drive and Edmonton Dr– Brian Drive, Pleasant View Dr, Old Sheppard Ave, Cairnside Cres

• Work involves approvals/permits by conservation authority and province

2009 and Beyond