OLD DUNDAS ROAD SEWAGE PUMPING STATION (HCOO5) WET WEATHER RELIEF MASTER PLAN AND CLASS ENVIRONMENTAL ASSESSMENT STUDY

Final Report Prepared for:

CITY OF HAMILTON 440 – 77 James Street North Hamilton, ON L8R 2K3

Prepared by:

AQUAFOR BEECH LIMITED 260 Skymark Avenue Building 6, Suite 202 Mississauga, ON L4W 5B2

October 15, 2014 Reference: 65420

EXECUTIVE SUMMARY

INTRODUCTION

Aquafor Beech Limited has been retained by the City of Hamilton to undertake a Master Plan and Class Environmental Assessment (EA) for the Old Dundas Road Sewage Pumping Station. The pumping station was designed and constructed in the 1970’s and services an area of approximately 180 hectares (See Figure ES.1).

The area is serviced by a separated sewer system, however field investigations showed that stormwater and groundwater infiltrate into the sanitary sewer system. As a result of the excess infiltration/inflow, the sanitary sewer system and Old Dundas Sewage Pumping Station are unable to convey flows during significant precipitation events. As a result basements in the area have flooded several times in recent years. City records show that basement flooding was reported in 2005, 2006 and 2013.

STUDY PURPOSE

The study purpose has been defined as follows:

Basement flooding occurs within the Old Dundas Road Sewage Pumping Station (HC005) catchment area during some wet weather events. The purpose of this study is to identify the causes of basement flooding and propose remedial measures to mitigate future basement flooding.

MUNICIPAL CLASS ENVIRONMENTAL ASSESSMENT (EA) PROCESS

The study, which was initiated as a Schedule ‘B’ project, was revised to follow the Master Plan process in order to provide a more logical approach for providing a strategic level of options to better address overall system needs. This study was completed following Approach 2 under the Class Environmental Assessment process and will therefore address Phases 1 and 2 of the EA process for any Schedule ‘B’ projects that are identified and outline additional work that will be required to implement Schedule ‘C’ projects.

PHASE 1 – PROBLEM AND OPPORTUNITY DEFINITION

Over the years, the City has undertaken routine maintenance on both the sewer systems and pumping station. However, in recent years residents have reported flooding associated with moderate or significant precipitation events.

i

In summary the primary problem therefore relates to basement flooding. This study will focus on flooding that is related to overloading of the sanitary sewer system and/or the Old Dundas Road Sewage Pumping Station (HC005).

The opportunity includes the development of an integrated solution in order that homes within the study area are provided with a level of flood protection (100 year storm) that meets or exceeds that of other areas of the City.

PHASE 2 - EVALUATION OF ALTERNATIVE SOLUTIONS

Definition of Existing Conditions

A variety of information was collected and reviewed in order to define existing conditions. In addition to collecting and reviewing existing information a significant amount of fieldwork was undertaken in order to better define existing conditions.

A summary of the field program is provided below:

• Closed circuit television work (CCTV) identified priority locations within the sanitary sewer where significant infiltration/inflow of stormwater and/or groundwater into the sewers occurred. • Wet weather inspection of the system identified priority locations within the sanitary sewer where significant infiltration/inflow of stormwater and/or groundwater into the sewers occurred. Smoke testing identified homes or businesses where stormwater from downspouts or catchbasins was directly or indirectly conveyed to the sanitary sewer system. • Flow monitoring identified the magnitude of infiltration/inflow into the sanitary sewer system for different precipitation events.

The Mike Urban Hydraulic/Hydrologic model was then used to establish existing conditions and estimate the degree of flooding for different return period storms (2 year through 100 year). A summary of the findings is provided below:

• The analysis showed that the flooding was generally limited to low lying areas adjacent to the Old Dundas Road Sewage Pumping Station, primarily along Old Dundas road and Millcreek Court. These areas are low lying and therefore susceptible to flooding. • The analysis also showed that flooding would occur relatively frequently (flooding in low lying areas would occur for the 2 year storm or greater).

ii SEWERSHED AREA

PUMPING STATION

FORCEMAIN (400mm)

SANITARY SEWER

CITY OF HAMILTON - ANCASTER AREA FIGURE ES-1: PUMPING STATION SERVICED AREA

• The cause of flooding is associated with a high amount of infiltration and inflow into the sanitary system that exceeds design standards. Although there is adequate capacity for dry weather flows the infiltration/inflow exceeds the capacity of the sanitary sewer system as well as at the Old Dundas Road Sewage Pumping Station. • For the 100 year storm approximately 400m3 of infiltration/inflow would have to be removed or stored in order to alleviate basement flooding.

EVALUATION OF ALTERNATIVES

The alternative solutions that were initially developed to address the problem and associated issues were broadly categorized as follows:

• Do-nothing • Private property works • Public property works • Inline/offline storage • Increase Capacity of Old Dundas Sewage Pumping Station • Provide an Emergency Overflow

The Do-nothing alternative is traditionally carried forward as a benchmark in the Environmental Assessment process. For the purpose of this study the ‘Do-Nothing’ alternative would essentially equate to maintaining status quo.

Private property works would include disconnecting roof downspouts and private catchbasins which are likely connected to the sanitary sewer system. These illicit connections were identified during smoke testing of the system. Improving drainage adjacent to homes is also recommended.

Public Property works include sealing maintenance hole covers and chambers and replacing or rehabilitating sewer pipes that are structurally unstable or contribute significant infiltration of groundwater into the sanitary sewer system.

iii

Inline/Offline storage would provide temporary storage to accommodate flows which exceed the capacity of the sanitary sewer system and/or the Old Dundas Road Sewage Pumping Station.

Old Dundas Road Sewage Pumping Station works would include measures to increase storage, pump or forcemain capacity.

Provision of an emergency overflow would protect homes from basement flooding for storms which exceed the specified level (100 year) of flood protection.

Each of the alternatives were then evaluated against a series of criteria which are broadly categorized as follows:

• Natural Environment • Economic • Social and Cultural Environment • Technical and Operational

SELECTION OF THE PREFERRED ALTERNATIVE

A Preferred Alternative was selected based on the evaluation process.

As was noted previously, this project was carried out using the Master Plan approach in order to provide a more logical approach for providing a strategic level of options to better address overall system needs. The approach for this study found that several alternatives were required in order to meet the objective of mitigating basement flooding associated with the sanitary sewer system or Old Dundas Road Pumping Station.

Based on the evaluation, three alternatives were found to be the most preferred with one alternative assessed as moderately preferred.

iv

Collectively, implementation of the Private and Public Property works together with Inline/Offline storage along Old Dundas Road will provide a 100 year level of flood protection against basement flooding for the study area. These works should form the core of the preferred alternative.

Implementation of an emergency overflow will provide relief to homeowners who would experience flooding during storms which exceed the 100 year level. For this reason this alternative has also been included as part of the preferred alternative solution. Implementation of this alternative will require completion of Phase 3 and 4 of the Environmental Assessment (Schedule ‘C’).

The estimated costs for the components are provided in the accompanying table together with the applicable Class Environmental Schedule.

Table ES-1: Summary of Preferred Alternative Solution Description Estimated Cost Municipal Class Environmental Assessment Schedule Private Property Works 1 $30,000 Not applicable Public Property Works $300,000 Schedule ‘A’ Inline/Offline Storage $700,000 Schedule ‘A+’ Emergency Overflow $200,000 to $600,000 Schedule ‘C’ Note: 1- Estimated Costs allocated for outreach and education program only.

A conceptual design for the inline storage alternative has been completed and is shown in Figure ES.2.

Public Consultation

Two Public Information Centres (PICs) were held. The first PIC described the study area, defined problems and opportunities as well as a long list of alternatives and evaluation criteria.

The second PIC presented the alternative solutions, evaluation criteria and the preliminary preferred solution. A summary of the findings and input is provided in Sections 4.4 and 6.5.

v CITY OF HAMILTON - ANCASTER AREA FIGURE ES-2: INLINE STORAGE CONCEPTUAL DESIGN

Schedule ‘C’ Requirements

Section 7.2.4 of this report illustrates a conceptual design for an overflow from the existing sanitary sewer system to Ancaster Creek.

During the course of this study, contact was made with the Ministry of the Environment (MOE) to discuss the requirements of the Emergency Overflow option. In summary, the MOE confirmed that this option will require the completion of a Schedule ‘C’ Environmental Study Report (ESR). Part of this ESR will require the completion of supporting documentation and associated studies to evaluate the impacts of any discharges of minimally treated sewage to the Ancaster Creek as a result of overflows. The ESR will also include a complete discussion of all permits, approvals and licences that will be necessary and should demonstrate that all agencies having jurisdiction have been consulted and can support a discharge to this coldwater stream.

vi City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study

Table of Contents

1.0 INTRODUCTION ...... 1 1.1 Background ...... 1 1.2 The Class Environmental Assessment Process ...... 1 1.3 Study Area Characteristics ...... 3 1.4 Study Purpose and Primary Tasks ...... 3

2.0 PROBLEM AND OPPORTUNITY IDENTIFICATION ...... 5 2.1 General ...... 5 2.2 Identification of Problems and Opportunities ...... 5

3.0 EXISTING CONDITIONS ...... 6 3.1 Study Area ...... 6 3.2 Natural Environment ...... 6 3.2.1 General ...... 6 3.2.2 Geology, Physiography and Soils ...... 6 3.2.3 Terrestrial Communities ...... 7 3.2.4 Aquatic Communities ...... 10 3.2.5 Archaeological and Cultural Heritage Assessments ...... 11 3.3 Socio-Economic Environment ...... 12 3.3.1 Land Use ...... 12 3.3.2 Proposed Land Uses ...... 13 3.3.3 Transportation...... 13 3.3.4 Policy ...... 13

4.0 EXISTING SYSTEMS ...... 17 4.1 General ...... 17 4.2 Existing Storm and Sanitary Sewer Systems ...... 17 4.2.1 Description of the Sewer Systems...... 17 4.2.2 CCTV Inspection and Smoke Testing ...... 18 4.3 Basement Flooding...... 19 4.3.1 General ...... 19 4.3.2 City Flooding Records ...... 20 4.4 Overview of Public Open House No.1...... 20

5.0 EVALUATION OF SANITARY SEWER SYSTEM AND PUMPING STATION ...... 21 5.1 General ...... 21 5.2 Hydrologic and Hydraulic Modeling ...... 21 5.2.1 Calibration and Validation of the Model ...... 23 5.2.2 Definition of Existing Conditions ...... 27 5.2.3 100-Year Design Storm Assessment Event ...... 28

Aquafor Beech Limited Reference: 65420 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 6.0 EVALUATION OF ALTERNATIVES ...... 29 6.1 General ...... 29 6.2 Generalized Approach for categorizing Alternatives ...... 29 6.2.1 Do Nothing ...... 29 6.2.2 Private Property Works ...... 29 6.2.3 Public Property Works ...... 30 6.2.4 Inline/Offline Storage ...... 31 6.2.5 Old Dundas Road Sanitary Sewage Pumping Station ...... 31 6.2.6 Emergency Overflow ...... 32 6.3 Description of the Evaluation Criteria ...... 32 6.4 Summary of the Evaluation Process ...... 33 6.4.1 ‘Do-nothing’ ...... 33 6.4.2 Private Property Works ...... 34 6.4.3 Public Property Works ...... 36 6.4.4 Inline/Offline Storage ...... 37 6.4.5 Old Dundas Sanitary Sewage Pumping Station ...... 38 6.4.6 Emergency Overflow ...... 39 6.5 Overview of Public Open House No.2 ...... 40

7.0 SELECTION AND DESCRIPTION OF THE PREFERRED ALTERNATIVE ...... 42 7.1 Selection of the Preferred Alternative ...... 42 7.2 Description of the Preferred Alternative ...... 43 7.2.1 Private Property Works ...... 43 7.2.2 Public Property Works ...... 44 7.2.3 Inline/Offline Storage ...... 45 7.2.4 Emergency Overflow ...... 45

8.0 COSTING ...... 47 8.1 Summary of EA Undertaken ...... 47

9.0 CONCLUSIONS AND RECOMMENDATIONS...... 48 9.1 General ...... 48 9.2 Conclusions ...... 48 9.3 Recommendations ...... 49

REFERENCES ...... 50

Aquafor Beech Limited Reference: 65420 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study LIST OF FIGURES

Figure 1.1 Municipal Class Environmental Assessment Planning and Design Process

Figure 1.2 Study Area

Figure 3.1 ESAs Locations

Figure 3.2 Niagara Escarpment Planning Area Designations

Figure 4.1 Study Area and Existing Sanitary Sewer System

Figure 4.2 Sanitary Sewer System and Pumping Station Schematic

Figure 4.3 CCTV Inspection Results

Figure 4.4 Initial Smoke Testing Summary

Figure 4.5 Reported Flooding Locations

Figure 5.1 Rain Gauge Locations

Figure 5.2 Sanitary Flow Monitoring Locations and Catchment Areas

Figure 5.3 Calibration Results for March 11- 14, 2013 Event

Figure 5.4 Calibration Results for April 24, 2013 Event

Figure 7.1 Inline Storage Conceptual Design

Figure 7.2 Emergency Overflow Conceptual Design

LIST OF TABLES

Table 5.1 Summary of Calibration Rainfall Events

Table 5.2 Summary of Flow Monitoring Locations

Table 6.1 Evaluation Criteria

Table 7.1 Evaluation of Alternatives

Table 8.1 Estimated costs of Recommended Solution

Table 8.2 Summary of EA Undertakings

Aquafor Beech Limited Reference: 65420 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 1.0 INTRODUCTION

1.1 Background

Aquafor Beech Limited has been retained by the City of Hamilton to undertake a Master Plan and Class Environmental Assessment (EA) for the Old Dundas Road Sewage Pumping Station. The pumping station was designed and constructed in the 1970’s and services an area of approximately 180 hectares.

Several studies, including an Environmental Impact Statement completed by Totten Sims Hubicki Associates in 1994 (TSH, 1994), have been completed on the pumping station. This study, which was commissioned by the City, looked at the alternative of providing an emergency overflow in order to reduce flooding of adjacent homes in the area during significant rainfall or rainfall/snowmelt events.

The study was never formally approved and in 1997 City Council authorized the release and abandonment of an overflow easement which had been acquired and registered in 1992.

More recently flooding of basements has occurred in 2005, 2006, and 2013. As a result of ongoing flooding complaints, this study was undertaken. The study, which was initiated as a Schedule ‘B’ project, was revised to follow the Master Plan process in order to provide a more logical approach for providing a strategic level of options to better address overall system needs.

1.2 The Class Environmental Assessment Process

The Municipal Class Environmental Assessment (Class EA), Municipal Engineers Association (MEA) document (October 2000, as amended in 2007 & 2011), describes the process that municipalities must follow in order to meet Ontario’s Environmental Assessment requirements for water, wastewater and road projects, including Master Plans. The process is illustrated in Figure 1.1, and may involve up to five phases of assessment. These phases include:

• Phase 1: Establish the Problem or Opportunity • Phase 2: Identify and Assess Alternative Solutions to the Problem, and Select a Preferred Alternative • Phase 3: Identify and Assess Alternative Design Concepts for the Preferred Solution, and Select a Preferred Design Concept • Phase 4: Prepare an Environmental Study Report • Phase 5: Progress with Design and Implementation

Aquafor Beech Limited 1 Reference: 65420

City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Public and agency consultation is also an important and necessary component of the above process.

The level of assessment depends on the type of project or Master Plan that a municipality is undertaking. The MEA’s Class EA document classifies projects as Schedules ‘A’, ‘B’ or ‘C’ depending on their level of environmental impact and public concern.

• Schedule ‘A’ projects are generally routine maintenance and upgrade projects; they do not have big environmental impacts or need public input. Schedule ‘A’ projects are all so routine that they are generally pre-approved without any further public consultation.

• Schedule ‘B’ projects have more environmental impact and do have public implications. Examples would be stormwater ponds, river crossings, expansion of water or sewage plants beyond their rated capacity, new or expanded outfalls and intakes, and the like. Schedule ‘B’ projects require completion of Phases 1 and 2 of the Class EA process.

• Schedule ‘C’ projects have the most major public and environmental impacts. Examples would be storage tanks and tunnels with disinfection, anything involving chemical treatment, or expansion beyond a water or sewage plant’s rated capacity. Schedule ‘C’ projects require completion of Phases 1 through 4 of the Class EA process, before proceeding to Phase 5 implementation.

As for particular projects, the MEA’s Class EA document has identified different approaches to completing Master Plans. Four approaches have been identified, each representing different levels of assessment. However, despite the approach selected, all Master Plans must address the first two phases of the Class Environmental Assessment process.

• Approach 1, the most common approach, is to follow Phases 1 and 2 as defined above, then use the Master Plan as a basis for future investigations of site specific Schedule ‘B’ and ‘C’ projects. Any Schedule ‘B’ and ‘C’ projects that need specific Phase 2 work and Phases 3 and 4 works usually have this Phase 2, 3 and 4 deferred until the actual project is implemented.

• Approach 2 is to complete all of the work necessary for Schedule ‘B’ site specific projects at the time they are identified. Using this approach, a municipality would identify everything it needed in the first ten years and would complete all the site specific work required, including public consultation to meet Class EA requirements. The Master Plan in such cases has to be completed with enough detail so that the public in site specific locations can be reasonably informed, and so that the approving

Aquafor Beech Limited 2 Reference: 65420 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study government Agencies (Conservation Authorities, Natural Resources, Federal Department of Fisheries and Oceans, Transportation Canada etc.) can be satisfied that their concerns will be addressed before construction commences.

• Approach 3 is to complete the requirements of Schedule ‘B’ and Schedule ‘C’ at the Master Plan stage.

• Approach 4 is to integrate approvals under the EA and Planning Acts. For example, the preparation of new or amended Official Plans could be undertaken simultaneously with Master Plans for water, wastewater and transportation, and approval for both sought through the same process.

The City has selected Approach 2 for undertaking this Master Plan. The Master Plan will therefore be completed such that the level of investigation, consultation and documentation is sufficient to fulfill the Municipal Class EA requirements for the Schedule ‘B’ projects identified in the Master Plan. Additional studies will be required for any project which falls under Schedule ‘C’.

Any project identified in this Master Plan must be classified as to their level of complexity, which will in turn decide which Schedule process needs to be followed. As a general guideline, Schedule ‘A’ projects are limited in scale and have minimal adverse environmental effects. Schedule ‘B’ projects have the potential for some adverse environmental effects, while Schedule ‘C’ projects have the potential for significant environmental effects.

Once the report is completed, staff will request Council’s endorsement prior to issuing the “Notice of Completion” and the 30-day review.

1.3 Study Area Characteristics

The study area, together with the existing sanitary sewer infrastructure, is shown in Figure 1.2. The study area covers 180 hectares. The predominant land use is residential (single family homes) with some commercial use along Wilson Street East.

Other significant features include the Tiffany Falls Environmentally Significant Area (ESA), which is located within and east of the study area, as well as the Dundas Valley ESA, which is located within and west of the study area. Ancaster Creek also flows adjacent to Rousseau Street and Wilson Avenue East. Ancaster Creek flows in a northern direction over the Escarpment to Sulphur Creek. These features are described in more detail in Sections 3.2.3 and 3.2.4.

Aquafor Beech Limited 3 Reference: 65420 SEWERSHED AREA

PUMPING STATION

FORCEMAIN (400mm)

SANITARY SEWER

CITY OF HAMILTON - ANCASTER AREA FIGURE 1.2: STUDY AREA City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 1.4 Study Purpose and Primary Tasks

The study purpose has been defined as follows:

Basement flooding occurs within the Old Dundas Road Sewage Pumping Station (HC005) catchment area during some wet weather events. The purpose of this study is to identify the causes of basement flooding and propose remedial measures to mitigate future basement flooding.

The primary tasks which were undertaken as part of this study and the associated chapters in which information is provided are summarized below:

Chapter 1 – Define the study purpose Chapter 2 – Define the problems and opportunities associated with the study Chapter 3 – Establish existing environmental and social conditions Chapter 4 – Define condition of the existing sanitary sewer system Chapter 5 – Evaluate suitability of the existing sanitary sewer system and pumping station Chapter 6 – Present and evaluate the alternative solutions Chapter 7 – Present and select the preferred alternative Chapter 8 – Provide estimated planning level costs Chapter 9 – Provide conclusions and recommendations

Aquafor Beech Limited 4 Reference: 65420 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 2.0 PROBLEM AND OPPORTUNITY IDENTIFICATION

2.1 General

Basement flooding occurs within the Old Dundas Road Sewage Pumping Station (HC005) catchment area during some wet weather events. The purpose of this study is to identify the causes of basement flooding and propose remedial measures to mitigate future basement flooding.

2.2 Identification of Problems and Opportunities

A brief description of the study area, historical practices and problems was provided in Chapter 1. As was noted, the area was originally developed in the 1970’s and 1980’s. The Old Dundas Sewage Pumping Station (HC005) was designed and constructed by the Ministry of the Environment (and Energy) in the 1970’s (TSH, 1994).

Over the years the City has undertaken routine maintenance on both the sewer systems and pumping station. However, in recent years residents have reported flooding associated with moderate or significant precipitation events. Further details with respect to the frequency and location of flooding, is provided in Chapter 4.

In summary, the primary problem therefore relates to basement flooding. This study will focus on flooding that is related to overloading of the sanitary sewer system and/or the Old Dundas Road Sewage Pumping Station (HC005).

Aquafor Beech Limited 5 Reference: 65420 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 3.0 EXISTING CONDITIONS

3.1 Study Area

The study area is bounded by Mohawk Road to the south, Wilson Street East to the west and north, and Filman Road to the east. The area is defined by the homes where sanitary sewage is conveyed to the Old Dundas Road Sewage Pumping Station (HC005).

The area is serviced by a separated sewer system. However, field investigations showed that excessive stormwater and groundwater enter into the sanitary sewer system. As a result of the excess infiltration/inflow, the sanitary sewer system and Old Dundas Sewage Pumping Station are unable to convey flows during significant precipitation events. As a result basements in the area have flooded several times in recent years.

3.2 Natural Environment

3.2.1 General

This section will describe the natural environment within and adjacent to the study area. The objective of the following sections is to describe the natural (as well as social and economic) environment from a study area perspective.

3.2.2 Geology, Physiography and Soils

The study area is located in the Niagara Escarpment physiographic region of southern Ontario. The Niagara Escarpment extends from the Niagara River to the northern tip of the Bruce Peninsula, continuing through the Manitoulin Islands (Chapman and Putman 1984: 114-122). Vertical cliffs along the brow outline most of the edge of the dolostone of the Lockport and Amabel Formations, and the slopes below are carved in red shale. Flanked by landscapes of glacial origin, the rock-hewn topography stands in striking contrast, and its steep-sided valleys are strongly suggestive of non-glacial regions. The highest section of the Niagara Escarpment is the Blue Mountain section, which stands over 300 metres above Georgian Bay. In this section the dolostone cap rock is exposed in cliffs 45 metres high, while huge stone blocks that have broke away from the wall have left deep crevasses in the area known as “the caves.” Blue Mountain is located northwest of the study area and “the caves” are located to the north.

Soils within the study area consist of Alberton silt loam, Ancaster silt loam, Springvale sandy loam, Toledo silt loam, Ancaster silt loam-Oneida clay loam complex, and Grimsby sandy loam- Ancaster silt loam complex, as well as stream course, ravine and escarpment (Dept. of Agriculture 1967). Alberton silt loam is an alluvial soil with variable drainage that has been

Aquafor Beech Limited 6 Reference: 65420 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study deposited in stream valleys, likely during flood events. This soil is typically found on level valley flats and frequently overlies finer sediments. The soil depth and underlying sediments have a major effect on the soil’s internal drainage, which is commonly imperfect (Presant et al. 1965: 44-45).

3.2.3 Terrestrial Communities

Significant regions of terrestrial ecological communities within the study area are limited to two Environmentally Sensitive Areas (ESAs) located partially within and adjacent to the study area. A very small portion of the Dundas Valley ESA is located in the western region of the study area, west of Wilson Street and south of Millcreek Court. A portion of the Tiffany Falls ESA is located in the central and eastern regions of the study area, east of Wilson Road, south of the Ancaster Heights neighbourhood, and north of Lime Kiln Road. The location of these ESAs in relation to the study area is illustrated in Figure 3.1. A brief description of these ESAs follows below:

Dundas Valley ESA

The Dundas Valley ESA is located at the western end of the Dundas Valley, and encompasses an extensive natural area on the northwestern fringe of the Hamilton-Dundas-Ancaster urban centre. Ecological investigations completed as part of the Hamilton-Wentworth Natural Areas Inventory (NAI) concluded that the area was significant as it provides habitat for eighty two (82) species of conservation concern, as there is a presence of significant natural biotic communities, a presence of highly diverse biotic and abiotic features, as it has an important ecological and hydrological function, and as it encompasses significant earth science and life science features (Heagy, 1993).

Contained within the Dundas Valley ESA are the Dundas Valley Earth Science Area of Natural and Scientific Interest (ANSI) and Dundas Valley Life Science ANSI.

Ancaster Creek and its tributaries Sulphur Creek and Spring Creek flow through the Dundas Valley ESA. A portion of a tributary of Ancaster Creek flows through the study area. Further information regarding watercourses within the study area is found in Section 3.2.4.

Tiffany Falls ESA

The Tiffany Falls ESA provides a link between the greenspace along the Niagara Escarpment corridor through the Hamilton urban area to the natural areas of the Dundas Valley. Ecological investigations completed as part of the Hamilton-Wentworth NAI concluded that the area was significant due to its provision of habitat for thirteen (13) species of conservation concern, the presence of four (4) provincially rare vegetation types, its important ecological function, and its encompassment of a significant earth science feature (Heagy, 1993; HCA, 2014).

Aquafor Beech Limited 7 Reference: 65420 Dundas Valley ESA µ ¯

TAT1-4 FODM5-11 FOD7-4 Dundas Valley ESA TAT1-4 CLO1-5 Tiffany Falls ESA KEY MAP CUM1-1 CUT1-4 Legend

TAT1-4 Old Dundas Road SPS CLO1-5 Studay Area WILSON ST. E. Ecological Land Classification TAT1-4 CLO1-5 Water TAT1-6 Forest Environmentally Sensitive Areas Successional

no data Tiffany Falls ESA Meadow CUP3-2 CLO1-5 SWT2-5 Tiffany Creek NOTES: Ancaster Creek FOD4-4 FOM3-1 MAS2-7 SULPHUR SPRINGS RD. 0 50 100 200 300 400 MAS2-1 Meters FOD6-5 ROUSSEAUX ST. no data

FOD4-4

Capital Planning & Implementation Division

77 James Street North MOHAWK RD. no data Hamilton ON L8R 2K3 Phone: (905) 546-2424 Fax: (905) 546-4435

no data CITY OF HAMILTON - ANCASTER AREA Natural Heritage Features within and

HALSON ST. Adjacent to the Study Area

GOLF LINKS RD. Hamilton Golf and Country Club FIGURE No.3.1

DATE: July 3, 2014 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Contained within the Tiffany Falls ESA is the regionally significant Tiffany Falls Earth Science ANSI. This ANSI contains regionally significant bedrock exposures and does not fall within the study area.

Also contained within the Tiffany Falls ESA is Tiffany Creek. After descending the escarpment at Tiffany Falls, Tiffany Creek passes through a culvert under Wilson Street. The Creek is located west of the study area.

Vegetation Communities

Background information solicited from the Hamilton Conservation Authority detailed the vegetation communities within the above ESAs and other locations within the study area. Classified vegetation communities within the study area are illustrated in Figure 3.1 and include:

• TAT1-4: Fresh-Moist Sugar Maple Carbonate Treed Talus • CLO1-5: Open Carbonate Cliff Rim • CUP3-2: White Pine Coniferous Plantation • FOD4-4: Dry-Fresh American Elm-White Ash Deciduous Forest • SWT2-5: Red-osier Mineral Thicket Swamp • FODM5-11: Dry-Fresh Sugar Maple-Hardwood Deciduous Forest

Of the above, TAT1-4 and CLO1-5 are considered rare in Ontario. These communities are located along the northeastern boundary of the study area and will not be affected under any of the proposed options.

Aquafor Beech Limited 8 Reference: 65420 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Wildlife

Terrestrial wildlife (flora and fauna) recorded in the Tiffany Falls ESA during surveys completed as part of the Hamilton-Wentworth NAI was provided to Aquafor Beech Limited by the Hamilton Conservation Authority. Species lists for mammals, herbs, avifauna, lepidopterans, odonates, and flora are included in Appendix A.

Of these, the following species are considered At Risk in Canada:

• Butternut (Juglans cinerea)*, Endangered; • Eastern Flowering Dogwood (Cornus florida)*, Endangered; • Eastern Wood-pewee (Contopus virens), Special Concern; • Louisiana Waterthrush (Parkesia motacilla)*, Special Concern; • Monarch (Danaus plexippus)*, Special Concern; and • Wood Thrush (Hylocichla mustelina), Threatened.

*Also at risk in Ontario.

Information on the Dundas Valley ESA was not included in data from the Hamilton Conservation Authority because it was mutually decided that the small portion of the ESA that fell within the study area was not significant enough to warrant the inclusion of a comprehensive review of the ESA within the document. Accordingly, species lists for the Dundas Valley ESA are also not included. Nevertheless, for information purposes a list of flora and fauna considered At Risk in Canada, taken from the Hamilton-Wentworth NAI (Heagy, 2003) is included as follows:

• Acadian Flycatcher (Empidonax virescens)*, Endangered; • American Chestnut (Castanea dentata)*, Endangered; • Broad Beech Fern (Phegopteris hexagonoptera)*, Special Concern; • Cerulean Warbler (Setophaga cerulean)*, Endangered; • Eastern Milksnake (Lampropeltus triangulum spp. triangulum)*, Special Concern; • Golden-winged Warbler (Vermivora chrysoptera)*, Special Concern; • Jefferson Salamander (Ambystoma jeffersonianum)*, Threatened; • Louisiana Waterthrush (Parkesia motacilla)*, Special Concern; • Monarch (Danaus plexippus)*, Special Concern; and • Ribbon Snake (Thamnophis sauritus)*, Special Concern.

*Also at risk in Ontario, Provincial designation may vary from National designation.

Aquafor Beech Limited Reference: 65420 9 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 3.2.4 Aquatic Communities

As mentioned above in Section 3.2.3, two watercourses are located partially within or adjacent to the study area. Further information on these watercourses and the aquatic communities they support is detailed below.

Ancaster Creek

As previously mentioned, Ancaster Creek is located within the Dundas Valley ESA. The section of tributary of Ancaster Creek that partially flows through the study area is considered an intermittent coldwater watercourse. The Ancaster Sewage Pumping Station is located in the “upper valley catchment” of the creek. The Hamilton-Wentworth NAI states that the Dundas Valley ESA maintains hydrologic balance and surface water quality in the encompassed watercourses (Heagy, 2003). Waterfalls within the Dundas Valley ESA (Lower Sydenham Falls, Dyment Falls, Steven's Falls, Hermitage Cascade, Heritage Falls, Mineral Springs Falls, Canterbury Falls, Little Canterbury Falls, Mill Falls (inset photo), Lower Mill Falls, and Sherman Falls) are barriers to fish migration. Photo: Mill Falls, Copyright © 2014 Hamilton Conservation Authority Fish communities within Ancaster Creek were assessed between 1986 and 2000 as part of the Hamilton-Wentworth NAI (Heagy, 2003). All species within Ancaster Creek are considered common in the City of Hamilton with the exception of the invasive sea lamprey (Petromyzon marinus), which is considered rare within the City. A list of fish species within Ancaster Creek is found in Appendix A.

Tiffany Creek

Tiffany Creek is located west of the study area within the Tiffany Falls ESA. The creek largely supports a warm water baitfish community, though coldwater groundwater inputs in downstream reaches of the creek may support rainbow trout migration. Rainbow Trout is considered uncommon in the City of Hamilton (Heagy, 2003). Waterfalls within the Tiffany Falls ESA (Tiffany Falls (inset photo), Little Falls, Lower Little Falls, Ancaster Heights Falls, and Washboard Falls) are considered barriers to fish migration.

Aquatic community surveys conducted in 1999 and 2000 revealed a total of seven (7) common and one (1) uncommon Photo: Tiffany Falls, Copyright © 2014 fish species in Tiffany Creek (Heagy, 2003). These species are Hamilton Conservation Authority

Aquafor Beech Limited Reference: 65420 10 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study listed in Appendix A.

3.2.5 Archaeological and Cultural Heritage Assessments

A Stage 1 archaeological assessment authored by Archaeological Services Inc., it is known that thirty seven (37) previously registered archaeological sites are located within 1 kilometre of the study area, though no previously registered sites are located within 300 metres of the preferred alternative. A review of the site conditions as well as the historical and archaeological contexts of the study area suggests that it has the potential for the identification of Aboriginal (Iroquoian) and Euro- Canadian (French and English, mostly, but also American loyalists) archaeological resources. The most visible modern-day Euro-Canadian archaeological and cultural heritage resource in the study area is the Ancaster Old Mill on Spencer

Creek, as well as several roads/streets. The Old Ancaster Mill (Archaeological Services Inc.) Ancaster Old Mill is designated under Part IV of the Ontario Heritage Act. Other built and cultural heritage resources within the study area include a residence at 601 Old Dundas Road and a watercourse (Ancaster Creek), respectively.

A detailed archaeological field analysis of the areas to potentially be impacted under the preferred alternative (i.e. the Old Dundas Road Sewage Pumping Station and the adjacent right- of-way associated with Old Dundas Road, north of the Pumping Station property) was conducted by Archaeological Services Inc. in April 2014. The property inspection determined that the preferred alternative does not possess archaeological potential due to deep and extensive land disturbance. Work outside of the area of the preferred alternative will require additional archaeological investigation.

A detailed cultural heritage field visit within and adjacent to the areas to potentially be impacted under the preferred alternative (i.e. the Old Dundas Road Sewage Pumping Station and the adjacent right-of-way associated with Old Dundas Road, north of the Pumping Station property) was conducted by Archaeological Services Inc. in June 2014. As mentioned above, cultural heritage resources within the study area consist of the Ancaster Old Mill, Ancaster Creek, and a late 19th-century residence at 601 Old Dundas Road. The Ancaster Old Mill property is located immediately southwest of the Pumping Station property. Ancaster Creek is located on the northwest side of Old Dundas Road, flowing behind residential properties before branching out and crossing Old Dundas Road to the Old Ancaster Mill on the southeast side of Old Dundas Road. The property at 601 Dundas Road is located directly adjacent to the southwest side of Old Dundas Road; a portion of the property is across the street from the Pumping Station property. It is currently unknown what, if any, impacts there may be on these cultural heritage resources.

Aquafor Beech Limited Reference: 65420 11 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Full Archaeological and Cultural Heritage reports completed by Archaeological Services Inc. are included in Appendix B.

3.3 Socio-Economic Environment

Surrounding Neighbourhood or Community

The surrounding communities are largely residential with some commercial areas spread throughout. The commercial areas are focused on Wilson Road East and are comprised of antique shops, unique specialty stores, restaurants, and cafés.

Wards and Neighbourhoods

The study area is primarily made up of a region of one City ward: mix

• Ward 12, also known as the Ancaster Area, is a combination of urban and rural regions, and is comprised of the former Town of Ancaster. It is bordered by the former Town of Dundas and Highway 403 on the north and west, a hydro corridor and Glanbrook Road on the east, and Sawmill Road (the city limit) on the south.

Ward 12 is home to Redeemer University College along Rymal Road and is part of the Dundas Valley Conservation Area as well. There are several small to medium commercial and light industrial sections within this ward, including the Meadowlands Power Centre and the Ancaster Business Park. Ward 12 is managed by the Hamilton, Niagara, and Grand River Conservation Authorities.

Ward 12

Ward 12 has 13,040 residents, which is 6.2% of the city’s total population. Between 2001 and 2006, Ward 12 has experienced a population increase of 22.7%. The proportion of children and youth aged 0 to 19 years is slightly higher in Ward 12 than in Hamilton.

3.3.1 Land Use

Ward 12 is located partly in the urban region of the community of Ancaster and partly in the rural region of the community of Flamborough. Agricultural land use comprises 57% (or 14,400 acres) of the total area, followed by open space at 16.7% or 4,204 acres, and then by residential land use at 11.8% or 2,981 acres.

Ward 12 has a 10.7 person per hectare population density for the land used as a residential area and 2.9 persons per hectare when all land uses are aggregated and averaged.

Aquafor Beech Limited Reference: 65420 12 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 3.3.2 Proposed Land Uses

Based on the Hamilton Official Plan, no significant land use by the City is proposed within the study area.

3.3.3 Transportation

Similar to Hamilton, the most common mode of transportation to and from work by employed residents in Ward 12 is by a car, truck or van.

The proportion of the labour force that uses public transit or walks to their place of work is much lower in Ward 12 when compared to Hamilton.

3.3.4 Policy

The study area falls within the Niagara Escarpment Planning Area, which is under the jurisdiction of the Niagara Escarpment Commission (NEC). The Niagara Escarpment Planning Area utilizes designations which apply to the study area and are shown below in Figure 3.2. They include:

• Escarpment Protection Area (orange) • Escarpment Natural Area (green) • Urban Area (pink)

The entirety of the preferred alternative area is located within the Urban Area of the Niagara Escarpment Planning Area. The objective of this designation is to “minimize the impact and further encroachment of urban growth on the Escarpment environment” (NEC, 2011).

Urban Area development objectives (Section 2) relevant to this project include the following:

• All development should be of an urban design compatible with the visual and natural environment of the Escarpment. Where appropriate, provision for adequate setbacks and screening should be required to minimize the visual impact of urban development on the Escarpment landscape; • New development should not encroach into the Escarpment Natural or Escarpment Protection Areas; and

Aquafor Beech Limited Reference: 65420 13 µ ¯

KEY MAP

Legend

Old Dundas Road SPS Studay Area WILSON ST. E. Niagara Escarpment Planning Area Escarpment Natural Area Escarpment Protection Area Escarpment Rural Area Mineral Resource Extraction Area Urban Area Tiffany Falls ESA Escarpment Recreation Area

Tiffany Creek NOTES: Ancaster Creek

SULPHUR SPRINGS RD. 0 50 100 200 300 400 Meters

ROUSSEAUX ST.

Capital Planning & Implementation Division

77 James Street North MOHAWK RD. Hamilton ON L8R 2K3 Phone: (905) 546-2424 Fax: (905) 546-4435

CITY OF HAMILTON - ANCASTER AREA

HALSON ST. Niagara Escarpment Planning Area

GOLF LINKS RD. FIGURE No.3.2

DATE: July 3, 2014 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study • Development proposals should be compatible with and provide for the protection or restoration of historic features or areas, archaeological sites and structures of architectural significance in accordance with Part 2.12.

Under General Development Criteria (Section 2.2), the following are relevant to this project:

• Permitted uses may be allowed provided that: a) The long term capacity of the site can support the use without a substantial negative impact on Escarpment environmental features such as contours, water quality, water quantity, natural vegetation, soil, wildlife, population, visual attractiveness and cultural heritage features. b) The cumulative impact of development will not have serious detrimental effects on the Escarpment environment (e.g. water quality, vegetation, soil, wildlife, and landscape). c) The site is not considered hazardous to life or property due to unstable soil conditions or possible flooding. d) Development meets applicable federal, provincial and municipal requirements including health and servicing requirements. • Private sewage systems and water supplies associated with permitted uses require, where specified by statute, the approval of the Ministry of Environment or its agent, the local Medical Officer of Health, or the authority having jurisdiction in these matters. • Any development permitted should be designed and located in such a manner as to preserve the natural, visual and cultural characteristics of the area. • Where development involves new roads, road improvements or service corridors, their designation and alignment should be in harmony with the Escarpment landscape.

Under Existing Uses policies (Section 2.3), the following are relevant to this project:

• An existing use may change to a similar use or more compatible use provided it can be sufficiently demonstrated that the objectives of the applicable designation of the Niagara Escarpment Plan are met. • Where an existing use has a substantial ecological or visual impact, the property owner shall be encouraged to bring the use into closer conformity with the objectives of the applicable designation of the Niagara Escarpment Plan (e.g. erect a fence around a wrecking yard or install manure storage facilities). • An existing use may change to a similar use or more compatible use provided it can be sufficiently demonstrated that the objectives of the applicable designation of the Niagara Escarpment Plan are met.

Under Water Resource policies (Section 2.6), the following are relevant to this project:

• Changes to natural drainage should be avoided.

Aquafor Beech Limited Reference: 65420 14 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study • No sewage system should be allowed closer than 30 metres (approximately 100 feet) from: a) The high water mark of any lake; b) The top of a streambank or ravine; or c) The edge of any wetland. Where this setback cannot be achieved on an existing lot of record the distance may be varied to the satisfaction of the Ministry of Environment or its designated agent. • A setback for other development will be established from each side of a stream, river bed, lakeshore or wetland necessary to maintain existing water quality. The width of this buffer shall be determined by the implementing authority in consultation with the Ministry of Environment, Conservation Authority and the Ministry of Natural Resources, which shall consider: a) Soil type; b) Types and amounts of vegetation cover; c) Slope of the land; and d) Fish and wildlife. • No alteration of the natural grade or drainage shall occur within the setback where, in the opinion of the implementing authority, such action would adversely affect surface and/or groundwater resources. • The cutting of trees within the setback is regulated by Parts 2.7 and 2.9, Development Criteria. • Where in the opinion of the implementing authority a potential ground or surface water pollution problem exists, the applicant shall detail through appropriate studies, the detrimental effects and how they will be minimized. • During development, the following sediment and erosion control practices should be carried out: a) Only the smallest practical area of land should be exposed at any time during the development. b) When land is exposed during development the exposure should be kept to the shortest practical period of time. c) Natural features such as tree groves, grades and waterways should be preserved. d) Temporary vegetation and/or mulching should be used to protect critical areas exposed during development. e) Final landscaping and vegetation should be installed as soon as practical following completion of the development. f) Topsoil should not be removed from the site, but rather, should be stored and redistributed as a suitable base for seeding and planting. g) Sediment control devices should be installed to remove sediment from runoff due to changed soil surface conditions during and after construction.

Aquafor Beech Limited Reference: 65420 15 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study h) Construction in or across a watercourse or wetland should be appropriately timed to minimize impacts on fish and wildlife habitat. • New Development or redevelopment adjacent to significant fishery resources shall demonstrate the following: a) The development shall ensure net gain/no net loss of productive capacity of fish habitat; b) Maintenance of minimum baseflow of watercourses; c) Maintenance of existing watercourses in a healthy, natural state; d) Maintenance of vegetative buffers in accordance with the sensitivity of the fishery resource and development criteria; and e) Best available construction and management practices shall be used to protect water quality and quantity, both during and after construction. Treatment of surface run-off to maintain water quality and hydrological characteristics in receiving watercourses shall meet the standards established by the Ministries of Environment and Natural Resources.

Under Transportation and Utilities policies (Section 2.15), the following are relevant to this project:

• All new and reconstructed transportation and utility facilities shall be designed and located to minimize the impact on the Escarpment environment and be consistent with the objectives of this Plan. Examples of such site and design guidelines include the following: a) Blasting, grading and tree removal should be minimized where possible through realignment and utilization of devices such as curbs and gutters, retaining walls and tree wells. b) Finished slopes should be graded to a 2 to 1 slope minimum and planted; large cuts should be terraced to minimize surface erosion and slope failure. c) Site rehabilitation should use native species of vegetation and blend into the surrounding landscape. d) Vegetation screens should be used where feasible.

Aquafor Beech Limited Reference: 65420 16 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 4.0 EXISTING SYSTEMS

4.1 General

This section describes the existing storm and sanitary sewer networks. In defining the existing systems, a variety of information was collected and reviewed. This information included plan and profile drawings which describe the sewer system, relevant background reports, CCTV inspection, smoke testing results that describe which sewer system the foundation drains and/or roof downspouts are connected to, and historical flooding records as collected by the City. The accompanying figure illustrates a separated sewer system.

4.2 Existing Storm and Sanitary Sewer Systems

4.2.1 Description of the Sewer Systems

The existing sanitary sewer system is illustrated in Figure 4.1. The information provided was compiled from the collection and review of existing information in order to better define existing conditions.

The area consists primarily of residential properties as well as commercial properties and serviced by a separated sewer system. Reviewed existing information included plan/profile drawings, CCTV inspection and smoke testing results together with topographic and land use mapping.

As is illustrated in Figure 4.1, sanitary sewers are located along each street and convey wastewater to a 525 mm diameter sewer located adjacent to the Old Dundas Road Sewage

Aquafor Beech Limited Reference: 65420 17 SEWERSHED AREA

PUMPING STATION

FORCEMAIN (400mm)

SANITARY SEWER

CITY OF HAMILTON - ANCASTER AREA FIGURE 4.1: STUDY AREA City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Pumping Station. Flows in the sewer are then pumped southerly through a 400mm forcemain to a gravity sewer on Lowden Ave, which ultimately leads to the Woodward Treatment Plant.

The storm sewer system along Old Dundas Road drains stormwater to a 750 mm diameter pipe which outlets at Ancaster Creek.

Figure 4.2 illustrates a schematic of the sanitary sewer system and pumping station. The 180 hectare sanitary service area consists of approximately 600 properties based on the GIS database.

4.2.2 CCTV Inspection and Smoke Testing

In order to define potential sources of the infiltration/inflow problems, the City undertook a series of field assessments. The objective of these assessments was to better define the sources of problems within both public and private properties.

CCTV Inspection

The City undertook a Closed Circuit Television (CCTV) program in 2000. The objective of this program was to determine the general condition of the sanitary sewer system and to determine which sewer pipes may need to be replaced for structural reasons or because their condition is contributing to the ongoing flooding problems.

Figure 4.3 summarizes locations where sanitary sewer pipes may need to be replaced or rehabilitated.

The CCTV documentation and sanitary inspection report were available for review within the study area. Based on discussions with the City staff in regards to the CCTV, it was determined that the rehabilitation works (repair of sewer infrastructure) are centered only on structural issues but not infiltration/inflow.

Smoke Testing Results

The City retained Thompson Flow Investigation (TQI) Inc. to undertake smoke testing within the study area in February 2013. Smoke testing was completed to determine where roof downspouts discharge (to the sanitary sewer or other location) or to locate cross connections between storm and sanitary sewer systems.

In summary, approximately 15 findings were identified from the smoke test results.

Aquafor Beech Limited Reference: 65420 18 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Figure 4.4 illustrates potential locations of infiltration/inflow as identified by the field program undertaken by the City.

Summary of Findings

The City undertook a separate study to identify potential sources of infiltration/inflow into the sanitary sewer system. Specific work included deployment of flow monitors in the sanitary system, a review of existing CCTV, smoke testing, and inspections of the system during wet weather.

The potential sources of flooding for the separated sewer system in the study area were generally attributed to the following:

— Roof downspouts that are directly or indirectly connected to the sanitary sewer system.

— Infiltration/inflow from the sanitary manhole chamber or maintenance hole covers.

— Catchbasins that are directly or indirectly connected to the sanitary sewer system.

— Infiltration/inflow from foundation drains that are directly or indirectly connected to the sanitary sewer system.

— Infiltration/inflow from defects in existing sanitary sewers.

4.3 Basement Flooding

4.3.1 General

The approach used to define the extent of flooding initially involved reviewing City records. Basement flooding occurs within the Old Dundas Road Sewage Pumping Station (HC005) catchment area during some wet weather events. The purpose of this study is to identify the causes of basement flooding and propose remedial measures to mitigate future basement flooding.

This study addresses basement flooding that occurs as a direct result of overloading of the sanitary sewer system during some wet weather events by rainfall, snowmelt and groundwater, which can enter the system as inflow and infiltration.

Aquafor Beech Limited Reference: 65420 19

CCTV Inspection report Length Diameter Distance Start MH Finish MH Description/Remark (m) (mm) (m)

38 Infiltration Runner around Connection 67 Infiltration Runner around Connection 67 Infiltration Runner under Connection 80 Infiltration Runner around Connection AK06A004 AK06A003 104 450 80 Infiltration dripper beside connection 80 Infiltration dripper around and under CN 98 Infiltration Seeper under CN 103 Infiltration Runner @ Pipe to MH Connection 37 Infiltration Seeper under CN AK06A005 AK06A004 94 450 64 Infiltration Runner around Connection AL05A002 AL05A001 90 450 85 Infiltration Seeper AK08A013 AK08A016 80 200 48 Infiltration Runner at Joint AL07A007 AL07A006 60 250 55 Infiltration Runner at Joint

SEWERSHED AREA

SEWER WITH INFILTRATION ISSUE

FLOODING LOCATION JAN 13 & 30, 2013

FLOODING LOCATION 2005-2006

FORCEMAIN (400mm)

SANITARY SEWER

CITY OF HAMILTON - ANCASTER AREA FIGURE 4.3: CCTV INSPECTION RESULTS City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 4.3.2 City Flooding Records

The City of Hamilton maintains a historical record of flooding problems for homeowners who report a problem during or after a rainfall event. In general the street name and house number are recorded as is the date on which the flooding occurred together with a summary of whether flooding was a result of storm, sanitary or undetermined discharge.

The City records show that a number of homeowners have experienced flooding problems dating back to the mid 2000’s. Typically flooding complaints were received for severe rainfall events such as those that occurred in 2005, 2006 and more recently in 2013. These records were used as a starting point to define the location, frequency and type of flooding problems.

Figure 4.5 shows the locations of basement flooding reported to the City for several storm events in the study area. The events include 2005, 2006, January 13 and January 30, 2013.

4.4 Overview of Public Open House No.1

The Notice of Study Commencement was published in the April 17 and 25, 2014 editions of the Hamilton Spectator. A copy of the notice and a comment sheet was mailed out to all relevant government agencies, local interest groups, Aboriginal contacts, and persons requesting to be a part of the study. In addition, the notices were delivered by Canada Post to everyone in the study area.

The first Public Information Centre was held on Monday, April 28, 2014 at the Ancaster Old Town Hall from 6:00 p.m. to 9:00 p.m. The purpose of this open house was to present an overview of the Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief study, to present some of the initial findings, to solicit feedback from the public, and to outline the next steps in the process. The open house consisted of display boards outlining the study purpose and background, as well as next steps. A copy of display panels was presented and is attached in Appendix C.

In total, five (5) people attended the meeting and each was given a Comment Sheet to provide feedback. City staff, as well as staff from Aquafor Beech Limited provided responses and clarification to questions raised by the public.

The comments that were received were limited and focused on the potential impact of proposed alternatives on the health of Ancaster Creek, the Escarpment or the Bruce trail.

Aquafor Beech Limited Reference: 65420 20 SEWERSHED AREA

LOCATIONS WHERE POSSIBLE CONNECTION TO SANITARY SEWER BY THOMPSON FLOW INVESTIGATION INC. (TQI)

PUMPING STATION

FORCEMAIN (400mm)

SANITARY SEWER

CITY OF HAMILTON - ANCASTER AREA FIGURE 4.4: INITIAL SMOKING TESTING SUMMARY SEWERSHED AREA

SANITARY FLOW MONITORING STATION

FLOODING LOCATION JAN 13 & 30, 2013

FLOODING LOCATION 2005-2006

PUMPING STATION FORCEMAIN (400mm)

SANITARY SEWER

CITY OF HAMILTON - ANCASTER AREA FIGURE 4.5: REPORTED FLOODING LOCATIONS City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 5.0 EVALUATION OF SANITARY SEWER SYSTEM AND PUMPING STATION

5.1 General

The previous section provided a description of the existing sewers network together with a summary of historical flooding problems and information relating to CCTV inspection and Smoke Testing for identifying the existing systems. The following sections outline the model set- up, calibration/validation and evaluation of the sanitary sewer system and pumping station.

Pumping Station Description

The Old Dundas Road Pumping Station, commissioned in 1974, is situated in a residential- commercial area near an Environmentally Significant Area (ESA). This ESA is known as the Dundas Valley and belongs to the Hamilton Region Conservation Authority. The station is located on the east side of Old Dundas Road, in Ancaster, across the street from Ancaster Creek. The station services an area of approximately 180 hectares with a population of approximately 2,300 in 2009.

5.2 Hydrologic and Hydraulic Modeling

Hydrologic and hydraulic modeling of the sanitary sewer network was undertaken. The MIKE URBAN (MU) simulation package from DHI software was selected by the City as the most appropriate tool for modeling of the Hamilton wastewater sewer system.

The objective of the modeling was to assess the capacity of the existing systems, relate this to existing flooding problems, and to provide insight for defining suitable alternatives.

The following sections explain the steps that were undertaken in order to setup the model.

Downstream Sanitary Sewer Segment Separation

The City-wide wastewater sewer system model in MU version 2009 was provided by the City and was used as a basis for determining flow rates and to assess sanitary sewer system capacity. The existing model was refined by removing all sanitary pipe segments and associated infrastructure which are not included in the study area.

The drainage areas to the pumping station were determined by reviewing the background information and existing MIKE URBAN model.

Aquafor Beech Limited Reference: 65420 21 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Field Investigation

Aquafor Beech staff undertook a field investigation by driving the entire study area. The locations of reported basement flooding were verified by field observation. The capacity of the existing sanitary network was defined by utilizing existing information together with more detailed information collected in the field.

Available Monitoring Sources

Precipitation Data

An analysis of the rainfall data collected by the City was undertaken to identify the following:

• Wet periods within the flow data record at the flow monitoring locations for the sanitary system; and • Suitable rainfall events for model calibration.

The City maintains two rainfall gauges adjacent to the study area. Based on the availability and quality of information and discussions with the City, it was agreed that the model calibration periods would be selected from monitoring and rainfall information for the 2013 year.

Flow and rainfall data were reviewed together to select suitable rainfall events for model calibration. Based on the data review, it was determined that there was a better match between the flow data and rainfall data recorded at Southcote (HC061) than the other rain gauge for most of the rainfall events. A total of five rainfall events were selected for model calibration. Figure 5.1 presents the location of each rainfall gauge. Table 5.1 summarizes the total rainfall volume, peak intensity, and duration for those calibration rainfall events.

Table 5.1 Summary of Calibration Rainfall Events Storm Event Rainfall (mm) Peak 1 Hour (mm) Duration (hours) 11-March-2013 12.0 2.2 12.5 09-April-2013 14.2 5.7 7.2 10 April-2013 12.3 5.5 15.2 12-April-2013 12.9 5.8 11.0 24-April-2013 10.4 3.7 7.4 28-May-2013 29.4 13.9 16.1

Flow Monitoring Data

In order to more reasonably assess the capacity of the sanitary sewer system, TQI was retained by the City to undertake a flow monitoring program at three locations in the study area. Three

Aquafor Beech Limited Reference: 65420 22 SEWERSHED AREA

CITY'S RAIN GAUGE LOCATION

SANITARY FLOW MONITORING STATION

FLOODING LOCATION JAN 13 & 30, 2013

FLOODING LOCATION 2005-2006

FORCEMAIN (400mm)

SANITARY SEWER CITY OF HAMILTON - ANCASTER AREA FIGURE 5.1: RAIN GAUGE LOCATIONS City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study flow monitors, capable of recording depth, velocity and flow rate on a 5-minute basis, were installed in the sewer system. Table 5.2 presents the monitoring manhole locations, system sizes, and period of record available in the analysis of flow data. Figure 5.2 presents the location of each flow monitoring gauge.

Table 5.2 Summary of Flow Monitoring Locations Site ID Manhole ID System Size Period of Record Available in the (mm) Analysis FM1 AK06A003 250 February 9, 2013 – June 4, 2013 FM2 AK06A001 250 February 9, 2013 – June 4, 2013 FM3 AL07A006 200 February 9, 2013 – June 4, 2013

It should be noted that calibration/validation for Station FM03 was not undertaken as the station is located upstream of Station FM02 within the same sewershed.

5.2.1 Calibration and Validation of the Model

General

Calibration of the MIKE URBAN model was undertaken using the information as discussed previously together with flow monitoring information at three sites.

For calibration, rainfall data were obtained from the rainfall gauge located adjacent to the study area (43 Maplevale Drive – Southcote – HC061). The Southcote rainfall gauge is maintained by the City and is adjacent to the study area. Therefore, the rainfall data was determined to have the best correlation to the flow monitoring data.

Calibration Process

A calibration procedure was developed to enhance the ability of the hydraulic model to represent existing hydrologic and hydraulic conditions. Key steps of the model calibration methodology are described below.

At two flow monitoring locations, modeled flows generated from the simulations were compared to measured flows for selected wet weather events which are larger than 10 mm in total volume from February to June 2013.

Throughout the calibration process, the sub-catchment areas remain unchanged. Sub-catchment percent imperviousness and other parameters (i.e. Infiltration, Surface Depression, etc.) were adjusted to achieve a reasonable match between the measured and modeled flows.

Aquafor Beech Limited Reference: 65420 23 SEWERSHED AREA

SANITARY FLOW MONITORING STATION

FM2 DRAINAGE AREA

FM1 DRAINAGE AREA

FORCEMAIN (400mm)

SANITARY SEWER CITY OF HAMILTON - ANCASTER AREA FIGURE 5.2: SANITARY FLOW MONITORING LOCATIONS AND DRAINAGE AREAS City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study The calibration/validation focused on factors such as properly apportioning downspout flows to grassed areas versus sewers.

In the calibration process, emphasis was placed first on minimizing the discrepancy between observed and simulated runoff volumes. Following calibration of runoff volumes, emphasis was then placed on minimizing the difference between observed and simulated peak flow rates, and matching the general hydrograph timing.

Calibration/Validation Results

Model calibration was completed using the rainfall data and flow monitored values, where reasonable flow monitoring data existed. The selection of calibration events depends on the availability and quality of flow data at the time of the rainfall event.

Model calibration was undertaken for several events, using the flow data collected at the two (2) flow monitoring stations.

Figure 5.3 to 5.4 – Several representative calibration results are presented which show the comparison of measured and modeled peak flows and event volumes for model calibration which was undertaken at the flow monitoring locations.

Aquafor Beech Limited Reference: 65420 24 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study

Figure 5.3 Calibration Results – March 11-14, 2013 at Station FM1 on Old Dundas Road

For the March 11–14, 2013 calibration event, the modeled peak flows and event volumes are within 10% of the measured data. The calibration results for this location indicate an excellent agreement between the modelled and measured hydrograph shapes. In general, modelled and measured flows and event volumes correspond reasonably well for the event considered. The model reasonably predicts flows at Station FM1 on Old Dundas Road.

Aquafor Beech Limited Reference: 65420 25 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study

Figure 5.4 Calibration Results – April 24, 2013 at Station FM2 on Old Dundas Road

For the April 24, 2013 calibration event, the model predicts a higher event volume than measured data. However, the modelled peak flows is within 15% of the measured data. The calibration results for this location indicate an excellent agreement between the modelled and measured hydrograph shapes. In general, modelled and measured flows and event volumes correspond reasonably well for the event considered. The model reasonably predicts flows at Station FM2 on Old Dundas Road.

The calibration results were compared to the monitoring data in terms of peak flow, volume and hydrograph shapes.

Where possible, the model was calibrated for peak flow and volume. However, more emphasis was placed on matching the peak flows, as the primary objective of the study was to assess the conveyance capacity of the sanitary sewer system.

Aquafor Beech Limited Reference: 65420 26 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Summary of Findings

Model calibration was undertaken using flow data collected at three flow monitoring locations. At least five events were used to calibrate the model at each site. The error inherent in the best flow monitoring data is typically in a range of +/-15%. Because of the errors inherent in flow monitoring, hydraulic models calibrated with flow monitoring data are also subject to error. To account for errors in the collection of flow monitoring data, a calibrated model that consistently predicts measured values within +/-20% is considered suitable for a detailed hydraulic analysis.

Of the acceptable monitored data, emphasis was placed on calibrating and validating the system for large events, as the system hydrology and hydraulics would be closer to that expected during the 100 year storm, which is the level of protection being targeted by the City.

Once the model predicted reasonable matches (peak flows, flow volumes and hydrograph shapes) between the modeled and measured data, it was run for the 100 year storm in order to provide a general comparison of results for the recent flooding records (January 13, 2013 and January 30, 2013). The results are further described in Section 5.2.3.

5.2.2 Definition of Existing Conditions

General

A variety of information was collected and reviewed in order to define existing conditions. In addition to this, fieldwork was undertaken in order to better define existing conditions. Programs included field assessments to define the condition of the existing roads, and inspection and verification of the sewer systems and pumping stations to better assess current conditions.

A summary of the field program is provided below:

• As noted in Section 4.2.2, Closed Circuit Television work (CCTV) identified priority locations within the sanitary sewer where significant infiltration/inflow of stormwater and/or groundwater into the sewers occurred. • Wet weather inspection of the system identified priority locations within the sanitary sewer where significant infiltration/inflow of stormwater and/or groundwater into the sewers occurred. Smoke testing identified homes or businesses where stormwater from downspouts or catchbasins was directly or indirectly conveyed to the sanitary sewer system. • Flow monitoring identified the magnitude of infiltration/inflow into the sanitary sewer system for different precipitation events.

Aquafor Beech Limited Reference: 65420 27 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Existing Conditions

Over the years the City has undertaken routine maintenance on both the sewer systems and pumping station. However, in recent years residents have reported flooding associated with moderate or significant precipitation events.

In summary, the primary problem therefore relates to basement flooding. This study will focus on flooding that is related to overloading of the sanitary sewer system and/or the Old Dundas Road Sewage Pumping Station (HC005).

The cause of flooding is associated with a high amount of infiltration and inflow into the sanitary system that exceeds design standards. Although there is adequate capacity for dry weather flows, the amount of infiltration/inflow during some wet weather events exceeds the capacity of the sanitary sewer system as well as that of the Old Dundas Road Sewage Pumping Station.

Flows under dry weather conditions do not exceed either the capacity of the sanitary sewers or the Old Dundas Road Sewage Pumping Station. As such, basement flooding does not occur during dry weather periods.

Flows during wet weather events periodically exceed both the capacity of the sanitary sewers and the Old Dundas Road Sewage Pumping Station. As a result, sewage from the sanitary sewers backs up into basements, causing flooding.

The flooding is generally limited to low lying areas adjacent to the Old Dundas Road Sewage Pumping Station.

The opportunity includes the development of an integrated solution so that homes within the study area are provided with a level of flood protection (100 year storm) that meets or exceeds that of other areas of the City.

5.2.3 100-Year Design Storm Assessment Event

The 100-year assessment event model results are used to develop and evaluate alternative remedial measures and size the preferred solution for the study area.

For the 100 year storm approximately 400m3 of infiltration/inflow would have to be removed or stored in order to alleviate basement flooding.

Aquafor Beech Limited Reference: 65420 28 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 6.0 EVALUATION OF ALTERNATIVES

6.1 General

This chapter: • Provides a general description of the types of alternative solutions that were considered in order to assess the problems and opportunities as defined in Section 2.2 and meet the study purpose as defined in Section 1.4; and • Provides an evaluation of the effectiveness of the alternative solutions.

6.2 Generalized Approach for categorizing Alternatives

Section 1.4 defined the study purpose as follows:

“To identify the causes of basement flooding and propose remedial measures to mitigate future basement flooding.”

As the study progressed it was determined that the Master Plan process within the Environmental Assessment process would be followed in order to provide a more logical approach for establishing a strategic level of options to better address overall system needs.

In a simplified sense the alternative solutions must therefore collectively address issues relating to flooding and the accompanying lack of capacity of the present sanitary sewer system as well as the Old Dundas Sewage Pumping Station.

A description of the alternative solutions that were considered for this study are provided in the following sections.

6.2.1 Do Nothing

This alternative is traditionally carried forward as a benchmark in the Environmental Assessment process. For the purpose of this study the ‘Do-Nothing’ alternative would essentially equate to maintaining the status quo. This would include the necessary ongoing operation and maintenance programs for the sanitary sewer system as well as the pumping station.

6.2.2 Private Property Works

As noted in Section 4.2.1, the area is serviced by a separated sewer system. In a separated sewer system there is an allocation for some stormwater or groundwater to infiltrate into the sanitary sewer system, particularly as the system ages. However, as noted in Section 3.1, the area

Aquafor Beech Limited Reference: 65420 29 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study serviced by the Old Dundas Road Sewage Pumping Station experiences significant levels of infiltration/inflow (I/I) during precipitation events. As noted previously, the excessive I/I overloads both the sanitary sewer system as well as the pumping station causing periodic flooding.

In order to define the potential sources of the infiltration/inflow problems the City undertook a series of field assessments. The objectives were to better define the sources within both public and private property. The findings are summarized in Section 4.2.2.

In order to reduce infiltration/inflow from private property homes and businesses there are three primary activities that could be undertaken. These include:

• Disconnecting downspouts that are directly or indirectly connected to the sanitary sewer system;

• Disconnecting driveway catchbasins that are directly or indirectly connected to the sanitary sewer system; and • Improve grading adjacent to the foundation of the home in order to direct runoff away from the homes.

Driveway catch basin

The accompanying figures illustrate examples for the above activities.

6.2.3 Public Property Works

In 2000 the City undertook a Closed Circuit Television (CCTV) program. The objective of this program was to determine the general condition of the sanitary sewer system and to define sewer pipes that may need to be replaced for structural reasons or because conditions contribute to ongoing flooding problems. A summary of the findings is presented in Section 4.2.2.

Aquafor Beech Limited Reference: 65420 30 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study In order to reduce infiltration/inflow from public property (the municipal right of way) there are several activities that could be undertaken. These include:

• Sealing maintenance hole covers and chambers; • Replacing sewer pipes that are structurally unstable or contribute to significant infiltration of groundwater into the system; and • Rehabilitating the sewers through various techniques to improve structural stability or reduce infiltration.

The accompanying figures illustrate examples for the above activities.

6.2.4 Inline/Offline Storage

The measures as noted in Sections 4.2.1 and 4.2.2 will, if implemented, reduce the amount of infiltration/inflow to the sanitary sewer system thereby reducing the flows to the sanitary system and pumping station. However, as the system ages alternative sources of I/I are likely to originate. It is also not always possible to identify all private property sources.

A common alternative to reduce basement flooding is to provide inline or offline storage within the sewer system. The objective would be to provide temporary storage to accommodate flows which exceed the capacity of the sanitary sewer system and/or the Old Dundas Road Sewage Pumping Station.

A concept which illustrates inline storage is shown below.

6.2.5 Old Dundas Road Sanitary Sewage Pumping Station

This alternative would involve increasing the capacity of the sanitary sewage pumping station to accommodate flows which exceed the capacity of the station.

A number of alternatives as summarized below could be considered:

Aquafor Beech Limited Reference: 65420 31 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study • Increase the capacity of the wet well to improve storage capacity; • Increase the capacity of the existing pumps; and • Increase the capacity of the forcemain which receives flows from the pumping station.

6.2.6 Emergency Overflow

The alternatives as noted below are typically designed such that a specific level of protection against basement flooding (in this case a 100 year level) is achieved.

An emergency overflow could also be implemented to protect homes from basement flooding for storms which exceed the specified level of protection. The Old Dundas Road Sewage Pumping Station is located adjacent to Ancaster creek so the overflow would likely be directed to this creek.

6.3 Description of the Evaluation Criteria

In order to evaluate the alternative solutions identified in the previous sections, a broad range of criteria have been developed. The evaluation of the alternatives based on these criteria would form the basis and justification for the selection of the preferred alternative(s). As was noted previously, this project was carried out using the Master Plan approach in order to provide a more logical approach for providing a strategic level of options to better address overall system needs. The approach for this study will therefore bring forward one or more alternatives, which when implemented together will meet the objective of mitigating basement flooding associated with the sanitary sewer system or Old Dundas Road Pumping Station.

The various criteria which are summarized in Table 6.1 were separated into the following general categories:

• Natural Environment • Economic • Social and Cultural Environment • Technical and Operational

Aquafor Beech Limited Reference: 65420 32 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Table 6.1 Evaluation Criteria Natural Environment • Potential Impact on Terrestrial Systems (vegetation, trees, wildlife) • Potential Impact on Aquatic Systems, Aquatic Life and Vegetation • Potential Impact on Soils, Groundwater and Surface Water Economic • Capital Costs • Operating/Maintenance Costs Social and Cultural Environment • Impact on Urban Greenspace/Recreational Use (trees, parks, open spaces) • Disruption to Community During Construction • Potential Impact to Archaeological and/or Natural Heritage Sites • Niagara Escarpment Commission Designations Technical and Operational • Effectiveness of Control Measure in Eliminating Basement Flooding • Feasibility of Control Measure (available space, accessibility, construction requirements) • Current Pumping Station Function • Location/Impacts of Other Utilities • Permits and Approvals

6.4 Summary of the Evaluation Process

6.4.1 ‘Do-nothing’

The ‘Do-nothing’ alternative, as noted previously, would essentially equate to maintaining the status quo. This alternative would include necessary on-going operation and maintenance practices.

Impact Assessment

The potential for impacts associated with the ‘Do-nothing’ alternative was assessed and options for mitigating these impacts were reviewed. Details on the assessment are included in the following paragraphs.

Aquafor Beech Limited Reference: 65420 33 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study

Natural Environment Factors

Construction activities would be limited to periodic maintenance activities at the existing pumping station and within the sanitary sewer system. The potential impact to the terrestrial, aquatic, groundwater and surface water environments would therefore be minimal.

Economic Factors

This alternative, together with the private property alternative would result in the lowest overall costs (excluding those associated with flooding of basements) of the six alternatives that were considered.

Social and Cultural Environment Factors

The impact on existing homeowners who flood would be considerable as ongoing flooding problems would remain. There would be no impact on urban greenspace or disruption to the community as no significant activities would be undertaken.

Technical and Operational Factors

This alternative would not reduce the frequency or extent of existing basement flooding problems and therefore would be the least effective alternative from a technical basis.

Overall

Overall this alternative was assessed to be the least effective alternative of the six that were considered as it does nothing toward meeting the objectives of this study. It is not recommended that this option be brought forward as part of an overall comprehensive solution.

6.4.2 Private Property Works

This alternative would consist of works undertaken on private property in locations where stormwater may be found to be entering the sanitary sewer system. Based on the smoke testing results as well as general assessments, these works would likely include disconnecting of downspouts and driveway catchbasins that are directly or indirectly connected to the sanitary sewer system as well as improving grading adjacent to the foundation of the home in order to direct runoff away from the homes.

Aquafor Beech Limited Reference: 65420 34 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Impact Assessment

The potential for impacts associated with the Private Property alternative was assessed and options for mitigating these impacts were reviewed. Details on the assessment are included in the following paragraphs.

Natural Environmental Factors

Construction activities would be limited to minor works on residential or commercial lands. The potential impact to the terrestrial, aquatic, groundwater and surface water environments would therefore be minimal if at all.

Economic Factors

This alternative, together with the ‘Do-nothing’ would result in the lowest overall costs as the measures as proposed are straightforward and cost effective. The approximate cost to undertake the proposed works is $30,000 and would include time and disbursements to undertake an outreach and education program. It has been assumed that the cost to undertake the physical measure on private property would be paid for by the landowner.

Social and Cultural Environment Factors

The impact on existing homeowners would be nominal due to the nature of the works being undertaken. There would be no impact on urban greenspace or to the community as a whole beyond the homes where works are undertaken.

Technical and Operational

This alternative would reduce infiltration/inflow generated from private lands thereby assisting in the reduction in the frequency and extent of existing basement flooding problems. This alternative would not, by itself, eliminate flooding problems.

Overall

This alternative was assessed as one of the most preferred alternatives as there is nominal impact on the natural and social and cultural environment, is cost effective and will contribute to the reduction in the frequency and extent of existing basement flooding problems.

Aquafor Beech Limited Reference: 65420 35 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 6.4.3 Public Property Works

This alternative would consist of works undertaken on public property in locations where the CCTV program found that stormwater or groundwater was found to be entering the sanitary sewer system. The general types of works that may be undertaken include sealing maintenance hole covers and chambers and replacing sewer pipes that are structurally unstable or contribute to significant infiltration of groundwater into the system.

Impact Assessment

The potential for impacts associated with the Public Property alternative was assessed and options for mitigating these impacts were reviewed. Details on the assessment are included in the following paragraphs.

Natural Environmental Factors

Construction activities would be limited to short term works within the existing municipal roadway system. The potential impact to the terrestrial, aquatic, groundwater and surface water environments would therefore be minimal if at all.

Economic Factors

This alternative, as compared to the other five, would result in a moderate cost associated with the rehabilitation of sewers at various locations. The approximate cost to undertake these works is $300,000.

Social and Cultural Environment Factors

There would be minimal disruption to the community during the construction period. There would be no impact on urban greenspace or to the community as a whole as the extent of the works would be limited to within existing roadways.

Technical and Operational Factors

This alternative would reduce infiltration/inflow generated from public lands thereby assisting in the reduction in the frequency and extent of existing basement flooding problems. This alternative would not, by itself, eliminate flooding problems.

Aquafor Beech Limited Reference: 65420 36 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Overall

This alternative was assessed as one of the most preferred alternatives as there is nominal impact on the natural and social and cultural environment, is moderately cost effective and will contribute to the reduction in the frequency and extent of existing basement flooding problems.

6.4.4 Inline/Offline Storage

This alternative would consist of expanding the capacity of the existing sanitary sewer system by providing inline or offline storage within the sewer system. The objective would be to provide temporary storage to accommodate flows which exceed the capacity of the sanitary sewer system and/or the Old Dundas Road Sewage Pumping Station.

Impact Assessment

The potential for impacts associated with the Inline/Offline alternative was assessed and options for mitigating these impacts were reviewed. Details on the assessment are included in the following paragraphs.

Natural Environmental Factors

Construction activities would be limited to medium term works within the existing municipal roadway system where inline or offline storage would be constructed. The potential impact to the terrestrial, aquatic, groundwater and surface water environments would therefore be limited and would be dependent upon the final location of the proposed works.

Economic Factors

This alternative, as compared to the other five, would result in a moderate cost associated with the construction of the proposed storage facility. The approximate cost to undertake these works (including utility relocates and easement acquisition if required) is $700,000.

Social and Cultural Environment Factors

There would be minimal disruption to the community during the construction period. There would be no or minimal impact on urban greenspace or to the community as a whole as the extent of the works would be limited to within existing roadways.

Aquafor Beech Limited Reference: 65420 37 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Technical and Operational Factors

Providing increased storage within the sanitary sewer system would accommodate flows which exceed the capacity of the sewers and pumping station. The solution could be used as a stand alone solution but is recommended to be undertaken with other cost effective measures which assist in reducing flooding.

Overall

This alternative was assessed as one of the most preferred alternatives as there is nominal impact on the natural and social and cultural environment, is moderately cost effective and will significantly contribute to the reduction in the frequency and extent of existing basement flooding problems.

6.4.5 Old Dundas Sanitary Sewage Pumping Station

This alternative would consist of expanding the capacity of the Old Dundas Road Sanitary Sewer Pumping Station by providing additional wet well storage, adding pump capacity or improving the capacity of the forcemain. The objective would be to increase the overall capacity of the pumping station to accommodate flows which presently exceed the existing capacity.

Impact Assessment

The potential for impacts associated with the Old Dundas Sanitary Sewage Pumping Station alternative was assessed and options for mitigating these impacts were reviewed. Details on the assessment are included in the following paragraphs.

Natural Environmental Factors

Construction activities would be limited to medium term works within the existing footprint of the pumping station. The potential impact to the terrestrial, aquatic, groundwater and surface water environments would therefore be limited and would be dependent upon the final type and location of the proposed works.

Economic Factors

This alternative, as compared to the other five, would result in the highest cost due to the requirements to update the capacity of the wet well, pumps and forcemain. The approximate cost to undertake these works is $1,500,000.

Aquafor Beech Limited Reference: 65420 38 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Social and Cultural Environment Factors

There would be minimal disruption to the community during the construction period. There would be no or minimal impact on urban greenspace or to the community as a whole as the extent of the works would be limited to the existing footprint of the pumping station lands.

Technical and Operational Factors

Providing increased capacity at the pumping station would reduce the occurrence of flooding, however flooding would likely still occur as flows during significant events would still exceed the capacity of the existing sanitary sewer system.

Overall

This alternative was assessed as one of the least preferred alternatives as it the most costly alternative and would only partially resolve ongoing basement flooding issues.

6.4.6 Emergency Overflow

This alternative would consist of providing an overflow from the existing sanitary sewer system or pumping station to the adjacent Ancaster Creek. The objective would be to protect homes from basement flooding for storms which exceed the specified level of protection (the 100 year storm).

Impact Assessment

The potential for impacts associated with the Emergency Overflow alternative was assessed and options for mitigating these impacts were reviewed. Details on the assessment are included in the following paragraphs.

Natural Environmental Factors

The potential impact on the terrestrial or aquatic environment is unknown at this time. Further studies would be required to determine the impact on the environment as a result of an overflow during extreme precipitation events.

Economic Factors

This alternative, as compared to the other five, would likely result in a moderate cost due to the proximity of the existing sanitary sewer system and pumping station to Ancaster Creek. In

Aquafor Beech Limited Reference: 65420 39 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study addition to the construction costs fees will be required to undertake Phase 3 of the Environmental Assessment process which will include specific studies to assess the impact on the environment.

Social and Cultural Environment Factors

There would be minimal disruption to the community during the construction period. The impact on urban greenspace or natural heritage sites would be defined at Phase 3 of the Environmental assessment process.

Technical and Operational Factors

The objective of the overflow would be to provide relief to the sewer system and pumping station during infrequent (greater than 100 year) storms. Construction of an overflow from the existing sanitary sewer along Old Dundas Road to Ancaster Creek is likely feasible from a construction perspective. However approvals from the Ministry of the Environment, Hamilton Conservation Authority, and Niagara escarpment Commission will be required. Thus the overall technical feasibility remains undefined until Schedule ‘C’ requirements have been fulfilled.

Overall

This moderately preferred/cost alternative will provide flooding relief beyond the 100 year level of protection or in a rare case of catastrophic pumping station failure/shutdown. It is recommended that the overflow be subject to further study. However, approval from a number of agencies will be required as the impact to the terrestrial and aquatic environment is unknown at this time. It is therefore recommended that this study be brought forward for subsequent consideration following the completion of this Master Plan and Class EA including Phase 1 and Phase 2 works.

6.5 Overview of Public Open House No.2

The second public meeting was held at the Ancaster Public Library on June 23, 2014 from 6:00 p.m. to 9:00 p.m. In anticipation of the second PIC, an advertisement was placed in the June 13 and June 20, 2014 editions of the Hamilton Spectator. A copy of the notice and a comment sheet was mailed out to all relevant government agencies, local interest groups, Aboriginal contacts, and persons requesting to be a part of the study. In addition, the notices were delivered by Canada Post to everyone in the study area.

The purpose of this open house was to present the alternative solutions, evaluation criteria, and the preliminary preferred solution. The open house consisted of display boards outlining the

Aquafor Beech Limited Reference: 65420 40 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study study purpose and background, alternative solutions, evaluation criteria and next steps. A copy of the display panels are attached in Appendix E.

Generally, those whom project staff spoke with were pleased and supportive to see this initiative being undertaken in the area in order to reduce/eliminate basement flooding problems.

In total, four (4) people attended the meeting and each was provided a Comment Sheet to provide feedback.

Input from the public was limited but did include a local resident who had experienced basement flooding recently and wanted assurance from the City that the problem would be resolved.

Aquafor Beech Limited Reference: 65420 41 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 7.0 SELECTION AND DESCRIPTION OF THE PREFERRED ALTERNATIVE

7.1 Selection of the Preferred Alternative

Table 7.1 Evaluation of Alternatives Alternative 5 – Alternative 2 – Alternative 3 – Alternative 4 – Old Dundas Alternative 6 Evaluation Alternative 1 – Private Property Public Property Inline/Offline Road Sanitary – Emergency Criteria Do Nothing Works Works (O & M) Storage Sewage Pumping Overflow Station Natural •No impact on •No impact on •No impact on •Limited impacts •Limited impacts •Potential Environment terrestrial, terrestrial, aquatic terrestrial, aquatic associated with associated with impact on aquatic or or groundwater/ or groundwater/ construction of construction of terrestrial & groundwater/ surface water surface water proposed works proposed works aquatic surface water environments environments environment environments which would be determined through future assessments Economic •Lowest overall •Lowest overall •Moderate cost, •Moderate cost, •Highest cost, due •Moderate cost, costs, excluding cost, associated associated with associated with to the requirement associated with costs associated with works to rehabilitation of construction of to upgrade the with flooding of remove sewers at various inline storage on pumping station construction of basements stormwater on locations Old Dundas Road and accompanying an overflow private property forcemain from the entering the sanitary system sanitary sewer to Ancaster system Creek Social and •Significant •Minimal •Minimal •Minimal •Minimal •Minimal Cultural disruption to disruption to disruption to disruption to disruption to disruption to Environment homeowners community during community during community during community during community who experience construction construction period construction construction during basement period •No impact on period period construction flooding •No impact on urban greenspace •No impact on •No impact on period urban greenspace or archaeological urban greenspace urban greenspace •Impact on or archaeological features or archaeological or archaeological greenspace features features features would be dependent upon route selected

Aquafor Beech Limited Reference: 65420 42 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study Technical •This alternative •Work would •Work would •Increased storage •Increased •Overflow and would not reduce reduce within the sanitary capacity at would provide Operational reduce infiltration/inflow infiltration/inflow sewer system pumping station relief to frequency or generated from generated from would would reduce flooding extent of private lands public lands accommodate occurrence of associated with existing thereby reducing thereby reducing flows which flooding infrequent basement extent of basement extent of basement exceed capacity of •Flooding may storms (greater flooding flooding flooding sewers and Old still occur as a than 100 year) problems Dundas Road result of •Approvals Sewage Pumping inadequate sewer from MOE, Station capacity HCA, and NEC likely required

Overall Alternative Rank

As shown in Table 7.1 there were three alternatives that were considered to be the most preferred with one alternative assessed as moderately preferred. Collectively, implementation of the Private and Public Property works together with Inline/Offline storage along Old Dundas Road will provide a 100 year level of flood protection against basement flooding for the study area. These works should form the core of the preferred alternative.

Implementation of an emergency overflow will provide relief to homeowners who would experience flooding during storms which exceed the 100 year level. For this reason this alternative has also been included as part of the preferred alternative solution. Implementation of this alternative, as noted previously, will require completion of Phase 3 and 4 of the Environmental Assessment (Schedule ‘C’).

7.2 Description of the Preferred Alternative

This section of the report identifies the key components of the preferred alternative that were developed for this Environmental Assessment. Preliminary design for several components will be provided at a subsequent date under separate cover.

7.2.1 Private Property Works

Section 6.2.2 summarized a variety of private property works that could be undertaken in order to reduce the infiltration/inflow of stormwater into the sanitary sewer system. In summary these works included:

Aquafor Beech Limited Reference: 65420 43 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study

• Disconnecting downspouts that are directly or indirectly connected to the sanitary sewer system; • Disconnecting driveway catchbasins that are directly or indirectly connected to the sanitary sewer system; and • Improve grading adjacent to the foundation of the home in order to direct runoff away from the homes.

In total there are approximately 20 homes or businesses where potential sources of infiltration/inflow were identified. The general location of these properties is shown in Figure 4.4.

The primary focus of the private property works would be to reduce the volume of stormwater that enters the sanitary sewer system. In order to ensure that the opportunity to promote/implement the private property works is maximized, the following steps are suggested.

The City initiate a public education program for the area to describe why the downspouts and catchbasins cause flooding problems and to inform residents as to how they can undertake the necessary measures themselves or contact the City in order to address any questions they may have. As part of this program the City can also provide guidance with respect to alternatives for improving grading adjacent to the foundations of homes or businesses.

The approximate cost for a program of this type is $30,000 which would include staff time and preparation of materials for an outreach and education program. It has been assumed that costs to undertake the physical measures on private property would be paid for by the landowner.

7.2.2 Public Property Works

Infiltration/inflow of stormwater and groundwater into the sanitary sewer system occurs within the public right of way. As noted in Section 6.2.3, there are several activities that could be undertaken to reduce the volume of infiltration/inflow. These include:

• Sealing maintenance hole covers and chambers; • Replacing sewer pipes that are structurally unstable or contribute to significant infiltration of groundwater into the system; and • Rehabilitating the sewers through various techniques to improve structural stability or reduce infiltration.

The City intends to undertake a program to reduce infiltration/inflow in high priority sewers later this year. Section 4.2.2 highlighted several of the high priority sewers to be rehabilitated based

Aquafor Beech Limited Reference: 65420 44 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study on CCTV work. The final rehabilitation will be based on a combination of infiltration/inflow as well as structural deficiencies and, as noted above, will be confirmed later this year. The overall cost to undertake these works will be confirmed once the tender is prepared. An approximate cost to address the high priority infiltration/inflow locations is $300,000.

7.2.3 Inline/Offline Storage

The objective of implementing the private, public and inline/offline storage works is to ensure that basement flooding does not occur for the 100 year storm. The primary areas which are subject to basement flooding are along Old Dundas Road between the pumping station and Montgomery Drive as well as Millcreek Court. During significant rainfall events the capacity of the sanitary sewer system and pumping station is exceeded and excess flows result in flooding of basements.

The technical analysis showed that there is approximately 400 m3 of excess infiltration/inflow of stormwater and groundwater during the 100 year design storm. This volume will be reduced once the private and public property works, as noted above, are implemented. A significant component of the preferred alternative is to provide inline storage to accommodate flows which exceed the capacity of the sanitary sewer system and/or the Old Dundas Road Sewage Pumping Station. The storage needs to be located at an elevation high enough so as to not impact the day to day operation of the existing pumping station. The storage also has to be located low enough (i.e. below the lowest basement floor elevation) so as to be effective in reducing flooding.

Figure 7.1 illustrates the conceptual design of an inline storage facility along Old Dundas Road. The existing 450 mm sanitary sewer would be replaced by a 1650 mm sewer. A total of 200 m of sewer from the pumping station to the intersection of Old Dundas Road and Montgomery Drive would be replaced. The top (obvert) of the existing and proposed sewer would be the same.

The preliminary design of the inline facility will be completed as part of this assignment once the Environmental Assessment requirements have been met. This document will provide further information with respect to details, steps to be undertaken at the design stage, approvals, etc. For the purpose of this document, the approximate cost for the inline storage facility has been estimated to be $700,000.

7.2.4 Emergency Overflow

The objective of the emergency overflow would be to provide relief for homes which flood when storms which exceed the 100 year storm occur. The details, including feasibility, studies to be undertaken, approvals, etc. would be defined as part of Phase 3 Schedule ‘C’ Project (the intent of this study would be to address the impacts on Ancaster Creek). An existing storm sewer which

Aquafor Beech Limited Reference: 65420 45 CITY OF HAMILTON - ANCASTER AREA FIGURE 7.1: INLINE STORAGE CONCEPTUAL DESIGN City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study outlets to the Creek could be used, or alternatively, a new sewer could be constructed. Figure 7.2 illustrates a potential concept for the emergency overflow.

Aquafor Beech Limited Reference: 65420 46 CITY OF HAMILTON - ANCASTER AREA FIGURE 7.2: EMERGENCY OVERFLOW CONCEPTUAL DESIGN City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 8.0 COSTING

Estimated planning level costs for the preferred alternatives were determined and are summarized in Table 8.1. As shown in the table, the estimated cost of implementing the recommended solution for the City is approximately $1,339,000 excluding the emergency overflow.

Table 8.1: Estimated costs of Preferred Alternatives

Preferred Description Estimated Cost Alternative Number 2 Private Property Works $30,000 3 Public Property Works $300,000 4 Inline/Offline Storage $700,000 6 Emergency Overflow $200,000 to $600,000

SUBTOTAL 1 $1,030,000 Engineering & Contingency (30% of subtotal) $309,000 GRAND TOTAL $1,339,000 Costs are exclusive of land acquisition and GST. Note: 1 - Excludes estimated cost for emergency overflow.

8.1 Summary of EA Undertaken

Table 8.2 summarizes the EA Schedule for all proposed undertakings associated with the Preferred Alternatives.

Table 8.2: Summary of EA Undertakings

Preferred Description Municipal Class Alternative Number EA Schedule 2 Private Property Works Not applicable 3 Public Property Works Schedule ‘A’ 4 Inline/Offline Storage Schedule ‘A+’ 6 Emergency Overflow Schedule ‘C’

Aquafor Beech Limited Reference: 65420 47 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study 9.0 CONCLUSIONS AND RECOMMENDATIONS

9.1 General

This study was completed following the Master Plan process (Approach 2) under the Class Environmental assessment process and will therefore address Phases 1 and 2 of the EA process for any Schedule ‘B’ projects and outlined additional work that will be required to implement Schedule ‘C’ projects. Subsequent phases will also include completion of conceptual and detail design drawings followed by construction and monitoring, as required, for the preferred alternative solution.

9.2 Conclusions

(1) The study, which was initiated as a Schedule ‘B’ project, was revised to follow the Master Plan process in order to provide a more logical approach for providing a strategic level of options to better address overall system needs. This study was completed following Approach 2 under the Class Environmental Assessment process. (2) The primary problem as identified in this study, relates to basement flooding that is associated with the overloading of the sanitary sewer system as a result of lack of capacity in the sanitary sewer system and/or the Old Dundas Road Sewage Pumping Station (HC005). (3) A program involving closed circuit television video (CCTV), smoke testing, field inspection, flow monitoring and computer analysis was undertaken to better define the causes and extent of flooding. (4) The analysis showed that the flooding was generally limited to low lying areas adjacent to the Old Dundas Road Sewage Pumping Station, primarily along Old Dundas road and Millcreek Court. These areas are low lying and therefore susceptible to flooding. (5) The analysis also showed that flooding would occur relatively frequently (flooding in low lying areas would occur for the 2 year storm or greater). (6) The cause of flooding is associated with a high amount of infiltration and inflow into the sanitary system that exceeds design standards. Although there is adequate capacity for dry weather flows, the infiltration/inflow exceeds the capacity of the sanitary sewer system as well as at the Old Dundas Road Sewage Pumping Station. (7) For the 100 year storm approximately 400m3 of infiltration/inflow would have to be removed or stored in order to alleviate basement flooding. (8) A variety of alternatives which included the following were considered: • Do-nothing • Private property works • Public property works

Aquafor Beech Limited Reference: 65420 48 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study • Inline/offline storage • Increase Capacity of Old Dundas Sewage Pumping Station • Provide an Emergency Overflow (9) The Preferred Alternative, which was selected based on the evaluation approach as outlined in Chapter 7, includes several alternatives in order to meet the objective of mitigating basement flooding associated with the sanitary sewer system or Old Dundas Road Pumping Station. The components of the Preferred alternative include private and public property works provision of inline storage to accommodate flows which exceed the capacity of the sanitary sewer system or the Old Dundas Road Sewage Pumping Station and the provision of an emergency overflow which will provide relief to homeowners who would experience flooding during storms which exceed the 100 year level and/or if a catastrophic shutdown/failure of the pumping station occurred. The estimated costs and appropriate Environmental Schedule for each component are provided in Tables 8.1 and 8.2 respectively. (10) The private and public property works as well as the inline storage Environmental Assessment requirements are covered under this study. Implementation of the Emergency Overflow will require completion of Phase 3 and 4 of the proposed works as part of the Schedule ‘C’ requirements. The Ministry of the Environment was contacted during this study and direction as to the potential requirements for this component were identified in a letter which is included in Appendix C-7.

9.3 Recommendations

(1) That the proposed private and public property works together with the provision of 400 m3 of inline storage be undertaken as per the direction provided in this document. Implementation of the private property works will likely require a public education program. The public property works should be implemented in a relatively straightforward manner through the issuance of a competitive tender document. Implementation of the inline storage will require conceptual and detail design to be completed. (2) That the City initiates the Schedule ‘C’ option of the emergency overflow works.

Aquafor Beech Limited Reference: 65420 49 City of Hamilton October 15, 2014 Old Dundas Road Sewage Pumping Station (HC005) Wet Weather Relief Master Plan and Class Environmental Assessment Study

REFERENCES

Totten Sims Hubicki Associates, 1994. Old Dundas Road Sewage Pumping Station Environmental Impact Statement. Prepared for The Regional Municipality of Hamilton- Wentworth.

Conestoga-Rovers & Associates, 2009. City of Hamilton Wastewater Pumping Station Assessment. Prepared for City of Hamilton.

Thompson Flow Investigation Inc., 2013. Report on Discharge Measurement of Forcemain from Old Dundas Road Sewage Pumping Station (HC005). Prepared for City of Hamilton.

Thompson Flow Investigation Inc., 2013. HC005 Catchment Area Sanitary Manhole Inspection. Prepared for City of Hamilton.

Thompson Flow Investigation Inc., 2013. Summary of Findings from the February 20-26th, 2013 Smoke Testing of the HC005 Catchment Area in Ancaster. Prepared for City of Hamilton.

Hamilton Conservation Authority. 2014. ANCA 11 Herps 2013 species list. PDF.

Heagy, A. 1993. Hamilton-Wentworth Natural Areas Inventory (NAI):Vol I&II. Hamilton Naturalists’ Club. Hamilton, Ontario.

Niagara Escarpment Commission. April 1, 2011. The Niagara Escarpment Plan, 2005. ISBN: 0- 7794-8194-1.

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