City of St. Catharines STORMWATER MANAGEMENT AND NON-POINT SOURCE RUNOFF Mayor Tim Rigby potx

City of St. Catharines
STORMWATER MANAGEMENT
AND NON-POINT SOURCE RUNOFF
Mayor Tim Rigby
PERSPECTIVE
We want to use our
We want to use our
waterways
waterways
–
–
1999 World
1999 World
Rowing Championships
Rowing Championships
6
6
Settled in 1800
Settled in 1800
6
6
Canal system in
Canal system in
1829
1829
6
6
Waterworks in
Waterworks in
1975
1975

6
6
Sewers to
Sewers to
waterways in 1912
waterways in 1912
6
6
Wastewater
Wastewater
treatment in 1951
treatment in 1951
6
6
CSO and
CSO and
stormwater
stormwater
problems
Courtesy of J. Lehnen
problems
World Class Henley Rowing Course in Martindale Pond
Tributary to Lake Ontario
ENVIRONMENTAL IMPACTS
ENVIRONMENTAL IMPACTS
(as identified by RAP)
(as identified by RAP)
6 Contamination of
recreational beach areas
6 Impacts on fisheries and

aquatic biota
6 Sediment quality and
benthic invertebrates
6 Contribution to fish
consumption advisories
6 Loss of fish habitat
6 Nutrient enrichment:
nuisance algal growth
Based on City of Toronto slide
PHYSICAL IMPACTS
PHYSICAL IMPACTS
6 Surface Flooding
6 Basement Flooding
6 Stream Erosion
6 Impacts on Infrastructure
Based on City of Toronto slide
St. Catharines
St. Catharines
134,000 pop.
134,000 pop.
BACKGROUND
BACKGROUND
–
–
St. Catharines
St. Catharines
(
(100 km
2
(40 mi

2
))
6 150 combined sewer overflow outfalls (6 directly to Lake
Ontario)
6 400 storm sewer outfalls (7 directly to Lake Ontario)
6 Sewer infrastructure: 540 km (336 mi)
Storm Sewers 340 km
Combined Sewers 200 km
Sanitary Sewers 340 km
6 4 Lake Ontario Beaches and 25 km
(16 mi) Lake Ontario waterfront
6 Watercourses: 120 km (75 mi)
6 Three major waterways:
6 Welland Ship Canal, Twelve Mile Creek and the
Old Welland Canal
6 25 urban creeks
BACKGROUND
BACKGROUND
–
–
Toronto
Toronto
(2.5M population, 640 km
(2.5M population, 640 km
2
2
( 250 mi
( 250 mi
2
2

))
))
6 79 combined sewer overflow outfalls (33 directly to Lake
Ontario)
6 2600 storm sewer outfalls (70 directly to Lake Ontario)
6 Sewer infrastructure: 10,400 km (6460 mi)
Storm Sewers 4,550 km
Combined Sewers 1,300 km
Sanitary Sewers 4,150 km
Large Trunks 400 km
6 14 Lake Ontario beaches and 43 km (27 mi) Lake Ontario
waterfront
6 Watercourses: 370 km
(230 mi)
6 6 major watersheds
Based on City of Toronto slide
City of Toronto
City of St.
Catharines
A TALE OF TWO CITIES
STORMWATER (CSO) MANAGEMENT OPTIONS
6
6
Source controls
Source controls
6
6
Downspout disconnection
Downspout disconnection
6

6
Flood alleviation program
Flood alleviation program
6
6
Others (pet litter control, spill
Others (pet litter control, spill
management)
management)
6
6
Conveyance
Conveyance
6
6
Swales
Swales
6
6
Perforated pipe (
Perforated pipe (
exfiltration
exfiltration
)
)
6
6
End of pipe
End of pipe
6

6
Combined sewer overflow control
Combined sewer overflow control
6
6
Flow balancing system
Flow balancing system
6
6
Stormwater
Stormwater
ponds and wetlands
ponds and wetlands
6
6
Watercourse restoration
Watercourse restoration
6
6
Watershed Management
Watershed Management
Based on Environment Canada slide
DOWNSPOUT DISCONNECTION PROGRAM
St. Catharines
6
6
By
By
-
-

Law requiring retroactive
Law requiring retroactive
disconnection
disconnection
6
6
Started with public
Started with public
education in 1991
education in 1991
6
6
Followed up by systematic,
Followed up by systematic,
annual inspections in older
annual inspections in older
combined and partially
combined and partially
separated sewer areas
separated sewer areas
6
6
17,086 homes inspected
17,086 homes inspected
6
6
98% compliant
98% compliant
DOWNSPOUT DISCONNECTION PROGRAM
DOWNSPOUT DISCONNECTION PROGRAM

Toronto
Toronto
6 City-wide voluntary
program
6 2,500 disconnections/year
6 Combined sewer service
areas a priority
6 Initial inspection by City
staff re: suitability
6 Free Rain Barrel provided
with disconnection
City of Toronto slide
FLOOD ALLEVIATION PROGRAM –
St. Catharines
6
6
Provides homeowners
Provides homeowners
protection from chronic
protection from chronic
basement flooding
basement flooding
6
6
Reduces inflow
Reduces inflow
6
6
Disconnect foundation
Disconnect foundation

drains, install sump pump
drains, install sump pump
and backwater valve
and backwater valve
6
6
Funds up to $2,500 per
Funds up to $2,500 per
installation
installation
6
6
1991 to 2004
1991 to 2004
-
-
$650,000
$650,000
6
6
294 installations
Valve closed
Valve open
294 installations
SOURCE CONTROLS
6 Pet Litter Control
6 Dry Weather Outfall Inspection
6 Strong Sewer Use By-law with
stormwater quality and control
requirements (Toronto)

SG400R
SG400R
6 Spill management
Underground spill containment device
collects floatables, oil, grease
CONVEYANCE MEASURES
CONVEYANCE MEASURES
6 roadside swales
6 stormwater percolates through soil
6 cleaner runoff intercepted through
subsurface perforated pipes
6 incorporated through
laneway reconstruction
6 stormwater percolates
through soil
LOT LEVEL CONTROLS
6 swales
6 surface drainage control
and/or oil/grit collectors
LANE DRAINS (TORONTO)
LANE DRAINS (TORONTO)
STORMWATER INFILTRATION SYSTEM
STORMWATER INFILTRATION SYSTEM
(NORTH YORK & ETOBICOKE)
(NORTH YORK & ETOBICOKE)
City of Toronto slide
CSO/SEWER SYSTEM CONTROLS
St. Catharines
6 Of
150+ in older areas

150+ in older areas
-
-
30 critical
30 critical
predicted to spill an estimated
predicted to spill an estimated
300,000 m3(10.6M ft3)/year
300,000 m3(10.6M ft3)/year
6
6
1992-2003 3 facilities, 3000m3 to
manage 15 overflows,
$17M in past
$17M in past
decade
decade
6 2004-2006: 6 facilities, 10000m
3
and
5km sewer upgrades to manage 15
overflows at $13.5M
6
6
Partners: City, Region of Niagara,
Partners: City, Region of Niagara,
Provincial SuperBuild Fund, Federal
Provincial SuperBuild Fund, Federal
Canada
Canada

-
-
Ontario Infrastructure Fund
Ontario Infrastructure Fund
360 m
3
sewage storage
Walker’s Creek facility
Completed Spring 2004
UNDERGROUND STORAGE/TREATMENT
UNDERGROUND STORAGE/TREATMENT
Toronto
Toronto
6 4 km, 3 metre diameter tunnel - 50
metres deep
6 7 shafts intercept flow from existing
system
6 3 - 30 metre diameter
storage/interception shafts
6 85,000 cubic metres of total storage
WESTERN BEACHES STORAGE TUNNEL
WESTERN BEACHES STORAGE TUNNEL
EASTERN BEACHES STORAGE TANKS
EASTERN BEACHES STORAGE TANKS
6 2,250 cubic metre tank at
Kenilworth Ave. (1992)
6 8,000 cubic metre tank at Maclean
Ave. (1994)
City of Toronto slide
CSO INITIATIVES

Niagara Falls
Thunder Bay
6
6
Pollution control planning over last 15 years: St. Catharines,
Pollution control planning over last 15 years: St. Catharines,
Toronto, Hamilton, Niagara Falls, Welland, Thunder Bay,
Toronto, Hamilton, Niagara Falls, Welland, Thunder Bay,
Windsor, Cornwall,
Windsor, Cornwall,
Sarnia
Sarnia
, other municipalities
, other municipalities
6
6
Recent infrastructure funding for CSOs has increased
Recent infrastructure funding for CSOs has increased
municipal initiatives: Niagara Region
municipal initiatives: Niagara Region
–
–
Welland, St.
Welland, St.
Catharines, Hamilton
Catharines, Hamilton
6
6
Assessment of alternative controls for
Assessment of alternative controls for

CSOs
CSOs
such as high rate
such as high rate
treatment
treatment
is underway to meet Provincial guidelines
is underway to meet Provincial guidelines
6
6
Initiatives support the Canada Ontario Agreement including
Initiatives support the Canada Ontario Agreement including
reducing
reducing
CSOs
CSOs
in
in
AOCs
AOCs
6
6
Environment Canada partners with municipalities and
Environment Canada partners with municipalities and
Provinces to provide advice/information to Canada’s
Provinces to provide advice/information to Canada’s
Infrastructure Program, guidance documents and
Infrastructure Program, guidance documents and
workshops/seminars on CSO control technology and
workshops/seminars on CSO control technology and

stormwater management
stormwater management
Sarnia
Cornwall
Welland
Windsor
Based on Environment Canada slides
TECHNOLOGY DEVELOPMENT
CSO High Rate Treatment
6
6
Polymer aided settling of CSOs
Polymer aided settling of CSOs
–
–
Toronto, Windsor, Welland
Toronto, Windsor, Welland
6
6
Vortex
Vortex
–
–
Niagara Falls
Niagara Falls
6
6
Feasibility
Feasibility
–

–
St. Catharines
St. Catharines
6
6
GLSF, NWRI, MOE, municipality
GLSF, NWRI, MOE, municipality
collaboration
collaboration
6
6
Now working on stormwater
Now working on stormwater
application in Toronto
application in Toronto
Potential cost savings: 144 million
Potential cost savings: 144 million
for 4 municipalities in
for 4 municipalities in
AOCs
AOCs
Full scale demonstration
North Toronto CSO tank
1997-present
Field pilot trials
Scarborough
1992 – 1998
Lab model of North Toronto CSO
tank at NWRI hydraulics lab
Based on Environment Canada slide

STORMWATER MANAGEMENT PONDS/WETLANDS
STORMWATER MANAGEMENT PONDS/WETLANDS
6 Taylor/Massey Creek subwatershed
6 Intercept flow from 10 outfalls
6 Ponds, wetlands & natural channel
6 Headwaters Centennial Creek subwatershed
6 Self-sustaining ecological park with
a series of 3 wetland/wet pond systems
SPRING CREEK & LOWER DUCK POND
(2000)
6 In High Park
6 Wetland & stream naturalization
6 Improve stormwater quality
EMERY CREEK POND (construction 2004)
6 Subwatershed to Humber River
6 Innovative 3 stage pond design with
spill containment and wetland
6 Services large industrial area
TERRAVIEW WILLOWFIELD PONDS (1999/2000)
WILLIAM ALEXANDER DEMPSEY ECO PARK (1999)
City of Toronto slide
Pelham Road
Louth St.
Proposed Site
Twelve Mile Creek
Extendicare
Fire
Hall
Glendale Ave.
6

6
Innovative management
Innovative management
to increase the capacity of
to increase the capacity of
existing outfall to
existing outfall to
accommodate further
accommodate further
development and improve
development and improve
quality of stormwater flow
quality of stormwater flow
CONSTRUCTED WETLAND
St. Catharines
PLAN OF CONSTRUCTED WETLAND:
Future: Trails and Interpretive Nature signage
FLOW BALANCING SYSTEMS
FLOW BALANCING SYSTEMS
DUNKERS FLOW BALANCING SYSTEM
(SCARBOROUGH)
6 5 cells (including wetland)
6 40,000 cubic metres storage
6 Pumping of lake water after event to
improve water circulation
6 Initiated facility performance assessment
ETOBICOKE SWM FACILITY
6 5 cells (including wetland)
6 80,000 cubic metres storage
6 Stormwater displaces lake water

6 Vegetative rafts proposed in wetland cell
6 Services redevelopment lands
City of Toronto slide
WATERCOURSE RESTORATION
WATERCOURSE RESTORATION
Humber Creek
Highland Creek - Markham Branch
Martindale Pond
6 improve water quality
6 aquatic and riparian habitat
improvements
6 initiated through subwatershed studies
6 complemented with stormwater
management
6 provide amenity to local community
Martindale Pond/Twelve Mile Creek
Based on City of Toronto slide
WATERSHED MANAGEMENT
6
6
Provincial regulation
Provincial regulation
coming
coming
–
–
Water Source
Water Source
Protection Plans
Protection Plans

6
6
Stormwater management
Stormwater management
–
–
will be critical component
will be critical component
NIAGARA WATER QUALITY PROTECTION
STRATEGY
6
6
Developed by
Developed by
Regional Niagara,
Regional Niagara,
Niagara Peninsula
Niagara Peninsula
Conservation
Conservation
Authority, Ontario
Authority, Ontario
Ministry of the
Ministry of the
Environment, 12
Environment, 12
municipalities, and the
municipalities, and the
public
public

6
6
$270M over 30 years
$270M over 30 years
www.regional.niagara.on.ca/government/initiatives/nwqps/pdf/NRRReport.pdf