Welcome to the joint Public Open House for 2016 Nepean South Infrastructure Projects, including the South Nepean Collector Sewer Phase 2. This is an opportunity for you to learn about the project and provide input on the planned works and traffic management strategies, as well as other aspects of the project.
Please feel free to view the presentation material. Should you have any questions regarding the presentation material, or any aspects of the project, please speak to any of the City of Ottawa staff or consultant team members in attendance.
We encourage you to provide comments in writing. Comment sheets are available at the registration desk. Please deposit completed forms in the comment box or mail / fax / email to the address indicated on the bottom of the sheet.
Lastly, we ask that you record your attendance on the sign-in sheet.
What Is the City Doing?
The Infrastructure Services and Planning and Growth Management Departments within the City of Ottawa have initiated the design and construction of the South Nepean Collector Phase 2 Sewer in the Barrhaven portion of the City of Ottawa. The sewer runs from the downstream termination point at Jockvale Road, through City-owned lands and privately-owned farmlands, ultimately ending at the upstream termination point just south of Strandherd Drive (a total length of approximately 2500m). The sewer will service ongoing and future development within this portion of the South Nepean urban area. Included in the scope of this project is:
- Site specific investigations to confirm the environmental, geotechnical, archaeological, cultural heritage and natural environment features of the site;
- Construction of a large diameter (900mm-1050mm) sanitary trunk sewer;
- Specialized construction considerations at the crossings of Jockvale Road and the Kennedy-Burnett Stormwater Management Facility; and
- Reinstatement of disturbed roadway segments along Jockvale Road and Greenbank Road.
Goals and Objectives of the Open House
The goals of this Public Open House are to:
- Introduce the project to the public;
- Present the preliminary design of the project;
- Identify areas for further review;
- Outline next steps; and
- Obtain your comments.
The former City of Nepean initiated a Master Servicing Study in 1994 for the South Nepean Urban Area (SNUA). The study was completed in 1997 and revised in 1998 in accordance with the requirements of Phase 1 and 2 of the Class Environmental Assessment for Municipal Water and Waste Water projects. This study provided a conceptual plan for water, wastewater and stormwater infrastructure to service the SNUA, including the recommendation to design and construct an east-west sanitary trunk sewer named the Jock River Collector. To better represent the servicing area, the Jock River Collector was renamed the South Nepean Collector (SNC). In 2003, a Functional Design was initiated to develop an optimal construction staging plan to allow final design and construction to progress once the SNC sewer was required.
Phase 1 of the SNC sewer was constructed in 2005 from Prince of Wales Drive, through Heart’s Desire Forest and Stonebridge Golf & Country Club and presently terminates at the upstream limit on Bren-Maur Road. In 2012, an update to the Functional Design was undertaken for the remaining phases in order to be prepared to proceed to final design and construction to meet development needs. In 2014, an Alignment Finalisation Report was produced to establish the exact corridor of the sanitary trunk sewer from the upstream termination point of Phase 1 to Strandherd Drive. This segment of the SNC is referred to as Phase 2. Moreover, the Alignment Finalisation Report established the invert elevation at the upstream end of the SNC sewer at the intersection of Strandherd Drive and Kennevale Drive (Phase 3), allowing for construction of proposed development lands north of Kennevale Drive for which the SNC sewer will ultimately service.
Municipal Class Environmental Assessment
No planning works under the municipal class environmental assessment planning process have been undertaken as part of the South Nepean Collector Phase 2 sewer project. It is understood that all works as part of the project have been previously environmentally cleared under the South Nepean Urban Area (SNUA) Master Servicing Study. As noted above, the Master Servicing Study was initiated in 1994 by the former City of Nepean for the SNUA, with the Study being completed in 1997 and revised in 1998 in accordance with the requirements of Phase 1 and Phase 2 of the Class Environmental Assessment (EA) for Municipal Water and Wastewater projects. A conceptual plan for water, wastewater and stormwater infrastructure to service the SNUA was developed as part of the Study, including recommendations to design and construct the east-west SNC sanitary trunk sewer. At the time of publication, Class EA planning guidelines limited the environmental clearance to implement projects with a 5-year sunset clause. Implementation of the EA recommendations was initiated within the 5-year sunset period with the extension of the West Rideau Collector.
As part of 2003 Functional Design for the South Nepean Collector sewer, the District Engineer of the Ministry of Environment confirmed that there was no need to develop an addendum to the ESR for the project since the extension of the West Rideau Collector had been initiated within the sunset clause period. Moreover, as part of the design for Phase 2 of the South Nepean Collector, the MOECC District Engineer was consulted and presented with similar rationale as to why an addendum to the ESR was not being undertaken as part of the design and construction for Phase 2 of the SNC sewer.
Project Plan [ PDF - 841 KB ]
Site Specific Investigations
Phase 1 Environmental Site Assessment
A Phase 1 Environmental Site Assessment (ESA) was completed in order to identify issues of environmental concern which have the potential to impact the soil and/or groundwater of the site and to assist in scoping any required Phase 2 ESA activities. Based on the findings, a Phase 2 ESA was recommended to be completed in conjunction with proposed geotechnical investigations to assess the soil and groundwater quality and to assist in the planning and scoping of the management of materials (soil and/or groundwater) during construction.
Phase 2 Environmental Site Assessment
The Phase 2 ESA included the collection and analysis of native soil, fill and topsoil from geotechnical boreholes and dedicated Phase 2 ESA locations along the project alignment. Recommendations for soil management were made based on the maximization of reuse of material and diversion from landfill. Soils in some locations were found to contain trace contaminants from pesticide application, hydrocarbons and background metals and may require off-site disposal during construction. Similar contaminants in groundwater were found and may require treatment prior to discharging groundwater pumped from the excavations.
Geotechnical & Hydrogeological
Geotechnical and Hydrogeological Investigations were carried out to assess the general subsurface and groundwater conditions throughout the project corridor. Subsurface conditions consist of surface topsoil, pavement structure and/or fill overlying native deposits of clay and/or general glacial till with sand and silt layers. In some locations, thin deposits of native sandy silt were also encountered. Where fully penetrated, the overburden is underlain by limestone bedrock. Groundwater is expected to be encountered at depths as shallow as one metre below the existing ground surface.
Stage 1 Archaeological Assessment
A Stage 1 Archaeological Site Assessment (ASA) was completed in order to identify known archaeological resources within the project area, to provide information on previous archaeological studies completed in the area, to assess the archaeological potential of the project corridor and to provide recommendations as to whether any additional archaeological investigations are required. Results of the Stage 1 ASA indicated that construction of the proposed sewer should be preceded by a Stage 2 ASA.
Stage 2 Archaeological Assessment
A Stage 2 ASA was undertaken to document archeological resources within the project area, to determine whether any identified archaeological resources required further assessment (i.e. a Stage 3 ASA) and to recommend appropriate Stage 3 ASA strategies if significant archaeological resources were identified. The Stage 2 ASA was completed over two days in November 2015 with assessments being completed by a combination of pedestrian survey (walking ploughed fields) and subsurface survey (hand excavated test pits). Seven find locations were identified during the Stage 2 ASA, with none considered to represent significant archaeological resources requiring additional investigation.
Cultural Heritage Overview
A Cultural Heritage Overview was conducted in order to provide initial guidance with respect to heritage resources on the project. A review of existing inventories, legislation, policies, published information, air photos and maps was undertaken. Seven known or potential cultural heritage resources were identified within the project area. One property, 261 Bren-Maur Road, is listed on the City of Ottawa Heritage Register and six other properties predate 1975 and are potential cultural heritage resources. The proposed sewer alignment is far enough removed from potential cultural heritage resources that no physical impacts are anticipated.
A Natural Environment survey was completed along the SNC sewer corridor to provide information on the natural environment features and the functions they represent for input into the engineering design, construction and other components of the project. Aquatic habitats, terrestrial habitats, and species at risk (SAR) were all reviewed along the project corridor. Several Butternuts were observed between Jockvale Road and Greenbank Road. As such, a Butternut Health Assessment was completed in August 2015 on all Butternuts within the proposed work area, as well as within 25 metres of the work area. A total of 23 Butternut’s were assessed, with 18 assessed as healthy, including two Category 3 Butternuts. As a result, a formalized permitting process is underway with the Ministry of Natural Resources and Forestry (MNRF) to remove/harm these butternuts. Compensation plantings for the butternut removals will be made through the Rideau Valley Conservation Foundation (RVCF).
Closed Circuit Television (CCTV) of existing sewers downstream of the SNC sewer was conducted to determine the sewers condition, as well as the extent of groundwater infiltration into the sewer. CCTV revealed significant calcite encrustation build-up at pipe joints, likely caused by groundwater infiltrating into the sewer as a result of static pressure induced by groundwater. Specialized piping/jointing techniques are being considered for the SNC Sewer to counteract groundwater infiltration.
Upstream termination of the SNC Phase 2 sewer occurs at the intersection of Strandherd Drive and future Clarke Fields Collector (Fraser Fields Way). It is anticipated that Phase 2 of the SNC sewer will be terminated south of existing Strandherd Drive within the future road right-of-way as to not disrupt Strandherd Drive.
An approximately 100m length of the SNC sewer is planned within the existing Greenbank Road right-of-way, south of St. Joseph High School and north of the crossing of the Jock River. It is anticipated that the affected section of Greenbank Road will be fully closed to vehicular traffic to enable the sewers construction. It is anticipated that sewer and roadway construction along this section will take approximately four (4) to six (6) weeks to complete. Pedestrian access along Greenbank Road will be maintained as to allow students attending St. Joseph High School to safely walk to school.
The SNC Sewer crosses a portion of the recently constructed Jockvale Road, just south of Longfields Drive. Based on an anticipated open-cut installation across Jockvale Road, northbound and southbound traffic will be shifted to either side of the median (one lane in each direction) while construction occurs on the other side. It is anticipated that sewer and roadway construction across Jockvale Road will take approximately six (6) to eight (8) weeks to complete.
Ministry of Tourism, Culture and Sport (Received) - February 2, 2016
Final Design Utility Circulation - May 6, 2016
Environmental Compliance Approval – May 8, 2016
Permit to Take Water – June 4, 2016
Butternut Removal Permit – Pre-Construction
Rideau Valley Conservation Authority – Pre-Construction
Department of Fisheries and Oceans – Pre-Construction
City of Ottawa Sewer Use Agreement – Pre-Construction
The majority of lands for which Phase 2 of the SNC sewer crosses are privately-owned, save for City-owned lands extending from the Greenbank Road ROW east to the project limits within the Bren-Maur Road ROW. In order to access these privately-owned lands to construct the sewer, construction easements are required between the City and landowners along the sewers alignment. At this time, it is anticipated that a 30m construction easement surrounding the sewers intended alignment will be sufficient for construction. Moreover, permanent easements between the City and landowners are required post-construction in order for the City to access and maintain the sewer, prior to future roadways being established. At this time, it is anticipated that a 9m wide easement centered on the sewers alignment will be sufficient for the permanent easement. The City of Ottawa’s Real Estate and Property Development Office is currently negotiating terms of construction and permanent easements with required landowners. It is expected that all required construction easements will be in place prior to the anticipated start of the sewers construction.
Milestone / Date:
Project Initiation – June 2015
Date Review and Collection – July 2015
Site Specific Investigations and Reporting – July-August 2015
Initiation of Required Approvals – September 2015
Completion of Preliminary Design – March, 2016
Public Information Session – March 21, 2016
Completion of Detailed Design – March, 2016
Tenders Close/Award of Contractor – June, 2016
Construction Start Date – July-August 2016
Construction Completion Date – Spring 2017
Jonathan Knoyle, P.Eng.
Senior Engineer, Infrastructure Projects
City of Ottawa
Infrastructure Services Department
Design & Construction Municipal West
100 Constellation Crescent
Ottawa, ON K2G 6J8
Tel: 613-580-2424 ext. 16436
Edson Donnelly, C.E.T.
Senior Project Manager
200-240 Michael Cowpland Drive
Ottawa, ON K2M 1P6