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

STORMWATER CSO MANAGEMENT OPTIONS6 Source controls 6 Downspout disconnection 6 Flood alleviation program 6 Others pet litter control, spill 6 Combined sewer overflow control 6 Flow bala

City of St Catharines STORMWATER MANAGEMENT

AND NON-POINT SOURCE RUNOFF

Mayor Tim Rigby

We want to use our waterways – 1999 World Rowing Championships

problems World Class Henley Rowing Course in Martindale Pond

Tributary to Lake Ontario

ENVIRONMENTAL IMPACTS

(as identified by RAP)

6 Contamination of

recreational beach areas

6 Impacts on fisheries and

St Catharines 134,000 pop.

BACKGROUND – 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)

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 – Toronto

(2.5M population, 640 km 2 ( 250 mi2))

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)

City of Toronto

City of St Catharines

A TALE OF TWO CITIES

STORMWATER (CSO) MANAGEMENT OPTIONS

6 Source controls

6 Downspout disconnection

6 Flood alleviation program

6 Others (pet litter control, spill

6 Combined sewer overflow control

6 Flow balancing system

6 Stormwater ponds and wetlands

6 Watercourse restoration

6 Watershed Management

Based on Environment Canada slide

DOWNSPOUT DISCONNECTION PROGRAM

annual inspections in older

combined and partially

separated sewer areas

DOWNSPOUT DISCONNECTION PROGRAM Toronto

6 City-wide voluntary program

FLOOD ALLEVIATION PROGRAM –

drains, install sump pump

and backwater valve

SOURCE CONTROLS

6 Pet Litter Control

6 Dry Weather Outfall Inspection

6 Strong Sewer Use By-law with

stormwater quality and control

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)

STORMWATER INFILTRATION SYSTEM (NORTH YORK & ETOBICOKE)

City of Toronto slide

CSO/SEWER SYSTEM CONTROLS

St Catharines

6 Of 150+ in older areas - 30 critical

predicted to spill an estimated

6 Partners: City, Region of Niagara,

Provincial SuperBuild Fund, Federal

Canada-Ontario Infrastructure Fund

360 m 3 sewage storage Walker’s Creek facility

Completed Spring 2004

6 85,000 cubic metres of total storage

WESTERN BEACHES STORAGE TUNNEL

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 Pollution control planning over last 15 years: St Catharines, Toronto, Hamilton, Niagara Falls, Welland, Thunder Bay,

Windsor, Cornwall, Sarnia, other municipalities

6 Recent infrastructure funding for CSOs has increased municipal initiatives: Niagara Region – Welland, St

TECHNOLOGY DEVELOPMENT

CSO High Rate Treatment

6 Polymer aided settling of CSOs

– Toronto, Windsor, Welland

6 Vortex – Niagara Falls

Potential cost savings: 144 million

for 4 municipalities in AOCs

Full scale demonstration North Toronto CSO tank 1997-present

Field pilot trials Scarborough

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

CONSTRUCTED WETLAND

St Catharines

PLAN OF CONSTRUCTED WETLAND: Future: Trails and Interpretive Nature signage

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

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

NIAGARA WATER QUALITY PROTECTION STRATEGY

6 Developed by

Regional Niagara, Niagara Peninsula Conservation

Authority, Ontario Ministry of the

Environment, 12 municipalities, and the public

6 $270M over 30 years

www.regional.niagara.on.ca/government/initiatives/nwqps/pdf/NRRReport.pdf

Niagara Water Quality Protection Strategy

HUMAN HEALTH

Clean and abundant drinking water for safe human consumption

PROPERTY RISK AND LIABILITY

Protection for residential, employment and public land uses from adverse flooding and erosion

NATURAL ENVIRONMENT

Sufficient water of a satisfactory quality in natural settings to

restore and maintain healthy flora, fauna and ecosystem integrity

AGRICULTURE AND COMMERCE

Clean and abundant water for agriculture and economic

opportunities

RECREATION

sustain recreational uses

TORONTO’S WET WEATHER FLOW MASTER

MANAGEMENT PLAN (Watershed Based) OBJECTIVES

WATER QUALITY

1 Meet guidelines for water

and sediment quality

2 Virtually eliminate toxics

through pollution prevention

3 Improve water quality in

rivers and the lake for body

contact recreation

4 Improve aesthetics

NATURAL AREAS AND

WILDLIFE

8 Protect, enhance and

restore natural features (eg

wetlands) and functions

9 Achieve healthy aquatic

communities

10 Reduce fish contamination

WATER QUANTITY

5 Preserve and re-establish

a natural hydrologic cycle

6 Reduce erosion impacts

on habitats and property

7 Eliminate or minimize threats to life and

property from flooding

SEWER SYSTEM

11 Eliminate discharges

of sanitary sewage

12 Reduce infiltration and

inflow to sanitary sewers

13 Reduce basement

flooding

Based on City of Toronto slide

TORONTO - OVERVIEW OF CITY-WIDE 25 YEAR PLAN

PUBLIC EDUCATION ($30 M ) MUNICIPAL OPERATIONS ($8 M ) SHORELINE MANAGEMENT ($42 M ) SOURCE CONTROLS ($112 M )

CONVEYANCE CONTROLS ($74 M ) STREAM RESTORATION ($131 M) BASEMENT FLOODING ($55 M ) END-OF-PIPE CONTROLS ($596 M ) TOTAL - $1,048M over 25 years

Based on City of Toronto slide

GREAT LAKES MUNICIPAL

Municipal Resources

6 Http://www.civil.ryerson.ca/

urban : Canadian web site

of stormwater and CSO

technology Urban Drainage