Toronto Water Environmental Initiatives

Big City Water Woes – Innovating the Fix
Michael D’Andrea, P.Eng.
Director, Water Infrastructure Management
City of Toronto
Connecting Water Resources – Changing the Water Paradigm
March 20, 2013
Ottawa, Ontario
Presentation Overview
• Toronto’s Water Infrastructure Challenges
and Solutions
• Asset management: infrastructure renewal
and servicing growth
• Environmental stewardship
• Urban flooding: climate change adaptation
City of Toronto – Some Key Statistics
• Canada’s largest City: over 2.7
million
• Total City of Toronto area: 641 km²
• Land Uses:
 45% residential
 23% open space & natural
areas
 10% industrial
 9% commercial
 13% other
• Lake Ontario Waterfront: 43 km
• Waterfront Beaches: 11
Toronto Water – What We Do
Mission Statement
To provide quality water services through supplying drinking water and
the treatment of wastewater and stormwater to residents, businesses
and visitors in order to protect public health, safety and property in an
environmentally and a fiscally responsible manner.
Guiding Principles
I. Continuous Service Delivery
Improvement
II. Financial Vitality, Viability and
Sustainability
III. Operational Excellence
IV. Infrastructure Management
V. Employer of Choice
Aging Infrastructure and Renewal Backlog
< 50 Yrs Old
59%
50 - 80 Yrs
Old
22%
> 100 Yrs Old
7%
80-100 Yrs
Old
12.4%
Watermains Profile
250
Length in km
200
150
100
50
0
1860
1870
1880
1890
1900
1910
1920
1930
1940
1950
1960
1970
1980
1990
2000
5 2010
Asset Management and Infrastructure Renewal –
Optimizing Decisions (cont’d)
“Mortality” Curves Approach
Asset Management and Infrastructure Renewal –
Optimizing Decisions (cont’d)
Condition Assessments:
-conventional and robot mounted CCTVs
-under water sonar
-watermain sound sensors
-watermain break history data
Damage to the Coxwell STS
Underwater Sonar
Robot Mounted CCTV
Images from redzone.com
RedZone Multi-Sensor
Asset Management and Infrastructure Renewal –
Optimizing Decisions
GIS mapping of linear assets
with attributes, condition
assessment data, and
hydraulic capacity
Mapping Tools: TWAG and InfoWater
Condition
Assessment
Mapping
Mapping Critical Locations
Asset Management and Infrastructure Renewal –
Optimizing Decisions (cont’d)
Multi-Year Capital Coordination Program
• Prioritization of over 400 projects based on scoring and ranking
methodology, risk assessment and corporate priorities:
o
o
o
o
o
Health & Safety
Legislated
State of Good Repair
Service Improvement
Growth Related
Capital Program Coordination Communications
T.O. INview (Infrastructure Viewer)
http://www.toronto.ca/inview/
Minimizing Construction Impacts –
Trenchless Technologies
• Structural lining
Image: http://www.trenchlessonline.com
• Slip lining
• Pipe bursting
• Horizontal directional drilling
• Microtunneling
• Pipe Bursting
Costefficiencies
Reduce
community
disruption
Water Efficiency Plan
• Adopted by City Council in 2003.
Updated in 2011.
• Reduce water consumption across
the City
• Create “in-system capacity” to
service population and
employment growth .
• Avoid/defer costly infrastructure
expansion
Toilet
Replacement
Program
• Financial incentives provided for
implementation of water
efficiency measures.
• Contains detailed implementation
schedule with sector specific
measures to help reduce water use,
water loss, and wastewater flows.
Industrial Water Rate
Public Education
Capacity Buy-Back
Program
Population and Water Consumption
Decreasing water
consumption as
population is
increasing
Average Residential Per
Capita Base Demand
21 % decrease from
2003 to 2012
City Wide Water Loss Reduction Strategy
• Water Metering Program
(Fixed Area Network Technology)
• Provides for at-site and remote
meter reading on demand
• Consumption Profiles - ability to
accurately analyze water
consumption by location, area,
sector
• Active Leak Detection
• Pressure Management - where
applicable
• Infrastructure Management infrastructure renewal
Environmental Stewardship
Toronto – “Area of Concern”
(as identified by the International Joint Commission - 1987)
Sewer Outfall Locations
15
Humber River Plume
Wet Weather Flow Master Plan
MONO
ADJALATOSORONTIO
RICHMOND
HILL
KING
CALEDON
Region
of
Peel
Watershed
Region
of
York
N
VAUGHAN
BRAMPTON
CITY OF
TORONTO
Watercourses
Regional Boundaries
Municipal Boundaries
Sub-Watersheds
Combined Sewer Area
Seperate Sewer Area
Sub-Watersheds
Humber River Main Stem
West Branch Humber River
Albion Creek
Black Creek
Berry Creek
Emery Creek
Humber Creek
Silver Creek
Combined Sewer Area
Sewershed
Residential
Lot
16
Lot Level Controls
Development - Redevelopment - Retrofit
Green Roofs
Mandatory
Downspout
Disconnection
Green Roof Bylaw
Parking Lot
17
Drainage
Porous Pavement Pocket Wetland
Greening Surface Parking Lots
Stream Restoration
Natural (Bio-engineering) Channel Design
Projects:
• Adaptive management approach
• Improved channel hydraulics, water quality,
aquatic and riparian habitat
• Stormwater management incorporated
• Amenity to local community
Humber Creek –
before restoration
Humber Creek –
after restoration
18
End of Pipe Stormwater
Management Infrastructure
Ellis Ave. Stormwater Pond
Terraview-Willowfield
Underground
Infiltration Basin
Etobicoke Flow Balancing
System
Western Beaches Tunnel
19
Earl Bales Stormwater Management Pond
• 3.2 hectare pond manages
stormwater runoff from a
550 ha residential and
industrial area.
• Treated stormwater to be
used for snow-making for
nearby ski hill in winter and
to water golf course in
summer.
• Awarded 2012 Living City
Award for Healthy Rivers
and Shorelines.
Earl Bales Ski Hill
Don Valley Golf Club
20
Earl Bales SWM Pond
DON RIVER & CENTRAL WATERFRONT PROJECT
Lower Don River - Inner Harbour - Taylor Massey Creek
21
Integrated Servicing
Dry Weather Servicing
Wet Weather Flow
Control
Integrated Solution
22
Climate Change Adaptation and
Urban Flooding
August 19, 2005 Storm
4,200 flooding complaints
Basement Flooding
City-Wide Work Plan
• Approved by Council in 2006
• 34 Priority Study Areas
• Design Standards approved:
– Sanitary sewer back-up protection for the May
2000 storm
– Upgrade storm drainage system to “New
Development” standards: 100 year storm
24
Adaptive Management Approach
• Lot Level Controls
•
•
•
•
•
Downspout disconnection
Proper lot grading
Installation of backwater valves on sanitary lateral
Capping off storm laterals & installation of sump
pump
Surface Flow Controls
• Catchbasin inlet control, increase # of catchbasins,
sealing maintenance hole covers, surface flow path
diversion
• Pipe - Conveyance Controls
• Pipe twinning, increasing sewer pipe size, high level
relief storm sewer
•
Storage
• Underground and above ground storage facilities
25
25
Public Outreach and Education
Concluding Thoughts
•
Funding/budgets insufficient to support the many competing priorities:
infrastructure renewal, servicing of future growth, environmental objectives,
climate change adaptation.
•
Multi-disciplinary, multi-faceted approach is required:
•
Adaptive - new urban development: opportunity to do it right! (lessons
learned from older municipalities); infrastructure renewal: opportunity to
“shoe-horn” in adaptation;
•
Integrated - Maximize/optimize use of existing infrastructure and build
new infrastructure to meet multi-servicing needs; and,
•
Innovative – adoption of new technologies, policies, approaches.
•
Shared responsibility among all sectors and the public: communication
and education is critical.
•
Lessons learned - knowledge and information sharing is key!
THANK YOU
Big City Water Woes – Innovating the Fix
Michael D’Andrea, P.Eng.
Director, Water Infrastructure Management
City of Toronto
[email protected]
www.toronto.ca/water