Loading...
HomeMy WebLinkAboutENG 05-22Report to Council Report Number: ENG 05-22 Date: March 28, 2022 From: Richard Holborn Director Engineering Services Subject: City of Pickering Frenchman’s Bay Stormwater Management Master Plan - Status Update - File: A-1440 Recommendation: 1. That Report ENG 05-22 from the Director, Engineering Services regarding a status update of the City of Pickering Frenchman’s Bay Stormwater Management Master Plan be received for information; and, 2. That the appropriate officials of the City of Pickering be authorized to take the necessary actions as indicated in this report. Executive Summary: At the Council Meeting of January 24, 2022 Correspondence 03-22 from David Steele dated December 31, 2021 regarding the City of Pickering Frenchman’s Bay Storwmater Management Master Plan (FBSWMMP) prepared by MMM Group was received, and staff was directed to report back to Council on the status of that report no later than March 28, 2022. The FBSWMMP dated April 2009 prepared by MMM Group was endorsed by Council Resolution #72/10 on April 19, 2010 through the approval of Report OES 04-10. The endorsement of the Master Plan was a commitment in principle to implementing watershed- wide stormwater management controls through a recommended suite of projects, programs and policies designed to address issues related to flooding, erosion and poor water quality in Frenchman’s Bay and its contributing watersheds. The Master Plan identified $53.8 million (in 2009 dollars) of projects, programs and monitoring spanning a period of 25 years. The purpose of Report ENG 05-22 is to advise Council of the components of the FBSWMMP that have been undertaken, are underway, or in the planning stages since the endorsement of the Master Plan approximately 12 years ago. The two most significant projects that have been completed are the Pine Creek and Amberlea Creek erosion control and restoration projects. Projects that are currently in the design and approvals stage include the Krosno Creek culvert replacements, and the Breezy Drive storm sewer outfall reconstruction. The Radom Street culvert replacements project is in the planning stage. From a policy aspect, the implementation of the City of Pickering Stormwater Management Guidelines in 2011 (which were recently updated in 2019) are key to ensuring that new development or redevelopment in the City of Pickering conforms to a set of criteria that protects and mitigates the impact of development on our watersheds. ENG 05-22 March 28, 2022 Subject: City of Pickering Frenchman’s Bay Stormwater Management Master Plan – Status Update Page 2 Financial Implications: There are no financial implications directly related to receiving this status report. An update of the FBSWMMP is required within the next five years, and the cost for the Master Plan update report was identified in the City’s 2017 Development Charges Background Study at a cost of $700,000. As the update has not taken place, it will be restated in the 2022 Development Charges Background Study. Discussion: At the Council Meeting of January 24, 2022 Correspondence 03-22 from David Steele dated December 31, 2021 regarding the City of Pickering Frenchman’s Bay Stormwater Management Master Plan (FBSWMMP) prepared by MMM Group was received, and staff was directed to report back to Council on the status of that report no later than March 28, 2022. In March 2006, Council gave approval for staff to retain MMM Group to develop a Stormwater Management Master Plan for Frenchman’s Bay and its contributing watersheds, namely Amberlea Creek, Dunbarton Creek, Pine Creek, Krosno Creek as well as the West Shore and Bay Ridges neighbourhoods with storm sewer systems that outfall directly into Frenchman’s Bay. The total area is approximately 2260 hectares. The preparation of a master plan was in response to long standing concerns regarding the ongoing decline in the water quality of the Frenchman’s Bay ecosystem mainly due to uncontrolled runoff entering the local creeks and Frenchman’s Bay itself. The FBSWMMP dated April 2009 prepared by MMM Group was endorsed by Council Resolution #72/10 on April 19, 2010 through the approval of Report OES 04-10. The endorsement of the Master Plan was a commitment in principle to the recommended suite of projects, programs and policies designed to address issues related to flooding, erosion and poor water quality in Frenchman’s Bay and its contributing watersheds. The FBSWMMP was based on implementing watershed-wide stormwater management controls in the form of source controls, conveyance controls and end of pipe/end of creek controls. The preferred alternative was “Scenario 4C” which is a combination of watershed-wide controls such as SWM facilities at the mouth of Amberlea, Dunbarton and Pine Creek (Level 1 sizing), surface SWM facilities in the watershed, Oil Grit Separators (OGS) for areas less than 5 hectares, and source controls. The Master Plan identified $53.8 million (in 2009 dollars) of projects, programs and monitoring spanning a period of 25 years. The first 5 years of the plan identified $25,605,000 of projects and programs, whereas the next 20 years of the plan identified $28,206,000 of projects and programs including the end of creek facilities in the amount of $19,000,000 which are described further in this report. Policies and Programs The City of Pickering introduced Stormwater Management Guidelines in 2011 to guide development and redevelopment from a water resources point of view. The guidelines include criteria by which development must conform to mitigate the impact of development on watercourses and receiving bodies of water such as Frenchman’s Bay and Lake Ontario. The ENG 05-22 March 28, 2022 Subject: City of Pickering Frenchman’s Bay Stormwater Management Master Plan – Status Update Page 3 guidelines include the use of on-site control measures such as Low Impact Development (LID) practices to promote ground water infiltration and reduced runoff volumes , measures to reduce pollutant and suspended solids loading such as oil grit separators and clean water collection systems, and the requirement for stormwater management facilities (ponds) to be designed for quantity, quality and erosion controls. The Stormwater Management Guidelines were recently updated in 2019 to incorporate more recent best management practices. Municipal activities such as street sweeping, catchbasin cleaning and storm sewer flushing can work to reduce the quantity of pollutants and suspended solids that end up in receiving water bodies. Over the last 12 years, the City has increased its fleet from one to three street sweepers. Catchbasin cleaning is completed on a four year cycle and storm sewer flushing and video inspection continues to be an annual maintenance program. The City introduced a pilot project to harvest Eurasian Milfoil Weed in Frenchman’s Bay in 2021 and is recommending a repeat of this program in 2022. Although eradication of this invasive weed is not achievable due to the extent of the invasion, removal of the weed assists with increasing the health of the Frenchman’s Bay ecosystem and increasing safety for recreational users of the bay. Projects Within the Master Plan A number of projects were recommended in the master plan such as erosion control/remediation projects, construction of stormwater management (SWM) facilities, and installation of oil grit separator (OGS) units. The consultant’s plan was extremely aggressive, recommending 10 SWM facilities and 20 OGS units in the first 5 years, and 10 SWM facilities and 14 OGS units in the next 20 years. It should be noted that many of the SWM facilities were recommended on developable lands not owned by the City of Pickering. The plan recommended SWM facilities at the mouth of Amberlea, Dunbarton, and Pine Creek in the second phase (Year 6 - 25) at an estimated cost of $19 Million. Discussion with both the Toronto & Region Conservation Authority (TRCA) and the Ministry of Natural Resources (MNR) during the consultation phase of the Master Plan indicated quite clearly that they did not support construction and maintenance of stormwater facilities in the provincially significant wetland (PSW), Frenchman’s Bay Coastal Wetland Complex. The City was advised that once all upstream initiatives were completed, and their effectiveness assessed, they would be willing to revisit the mouth of creek proposal, more so as a restoration project for the PSW . When the FBSWMMP is updated, the viability of this project will be reviewed. Projects Completed Sandy Beach Road Bridge Replacement 2006 Although this project was initiated before the FBSWMMP was completed, replacing this bridge with a larger structure resulted in an increase of flow through capacity which relieved some of the flooding concerns in the Krosno Creek watershed upstream of this bridge. ENG 05-22 March 28, 2022 Subject: City of Pickering Frenchman’s Bay Stormwater Management Master Plan – Status Update Page 4 Amberlea Creek Erosion Control and Restoration This project was the most significant undertaking outlined in the Master Plan. Site specific stormwater management controls to deal with flooding and erosion problems were identified in this area. The severe local channel erosion of the valley wall on Amberlea Creek downstream of Bayly Street and the resulting sediment transport and deposition downstream and into Frenchman’s Bay needed to be addressed to prevent further decline. This project was undertaken in 2014 at a cost of approximately $2.1 Million. Upon completion, the area was monitored for three years to determine its stability. Pine Creek Erosion Control and Restoration Another significant erosion control and restoration project identified in the Master Plan was within Pine Creek south of the storm sewer outfall east of Mountcastle Crescent, west of Dixie Road. The Master Plan concluded that restoration of the channel would be the most cost effective and least disruptive solution. The project was undertaken in 2016 at a cost of approximately $1.1 Million. Upon completion, the area was monitored for three years to determine its stability. West Shore Boulevard/Sunrise Avenue OGS The installation of an OGS unit was included in the design and reconstruction of West Shore Boulevard from Oklahoma Drive to Sunrise Avenue undertaken in 2012. The OGS component of the project was at a cost of approximately $120,000. Browning Street OGS Installation The installation of an OGS unit was included in the design and reconstruction of the Browning Avenue storm sewer replacement west of Fairview Avenue undertaken in 2016. The OGS component was at a cost of approximately $50,000. Pine Creek Culvert Replacements – Douglas Park As part of a Region of Durham sanitary sewer replacement project, the five parallel culverts in Pine Creek, at the north end of Douglas Park, that supported the sanitary sewer and pedestrian walkway were replaced with a bridge. A large scour in the creek bed had developed over years at the downstream end of the culverts resulting in erosion and the transport and deposition of sediment further downstream towards Frenchman’s Bay. Projects in the Planning and Design Stage Krosno Creek Culvert Replacements The replacement of three culverts in Krosno Creek, at Morden Lane, Reytan Boulevard and Alyssum Street, to increase their capacity and reduce upstream flooding was a recommendation of the Krosno Creek Flood Reduction Study Class Environmental Assessment completed in 2015. The FBSWMMP identified a solution whereby flows from Krosno Creek would be diverted to Pine Creek upstream of Hwy 401. However, the Class EA offered a solution that restricted increased flows south of Hwy 401 and recommended that the Krosno Creek culverts south of Bayly street be replaced with larger culverts to reduce ENG 05-22 March 28, 2022 Subject: City of Pickering Frenchman’s Bay Stormwater Management Master Plan – Status Update Page 5 backwater effect and potential flooding. With this solution, a diversion of flows to Pine Creek is not necessary. The culvert replacement project design is complete. Funds in the amount of $4.8 Million for construction were approved in the 2019 Capital Budget and utility relocation in the area of the three culverts is being completed. The construction cost also includes creek rehabilitation works between Reytan Boulevard and Sandy Beach Road. Breezy Drive Storm Sewer Outfall Reconstruction The design to reconstruct the storm sewer outfall at the intersection of Breezy Drive and Sunrise Avenue, south of the Frenchman’s Bay Yacht Club, is underway and will be complete in 2022. Additional funds for construction over and above funds already approved are recommended in the 2022 Capital Budget. The construction cost is estimated at $1.75 Million and the scope of work includes constructing a sediment forebay at the storm sewer outfall and a large OGS unit upstream of the outfall. Radom Street Culvert Replacements There are two large corrugated steel culverts in Pine Creek at the Radom Street crossing. The culverts are deteriorating and being undermined. The FBSWMMP identified replacing these culverts with larger culverts along with other works in the Pine Creek flood plain, upstream of Hwy 401, to mitigate flooding potential on properties north of Kingston Road. This project is in the planning stage as funds for design were approved in 2021 and construction is forecasted in 2023. The project is estimated at $1.75 Million. Frenchman’s Bay Stormwater Management Plan Update As with most Master Plans, it is prudent that the FBSWMMP be revisited and updated in the near future to look at many aspects such as: • Changes in legislation and/or regulations • Changes in stormwater management policies and criteria • Current environmental issues and objectives • Current best management practices and new innovation • Effectiveness of the measures implemented to date • Cost estimates of components of the Master Plan • Partnerships and funding opportunities City staff have recognized the importance of this Master Plan and its requirement to be updated after a period of time has passed. A FBSWMMP Update was identified in the 2017 Development Charges Background Study at an estimated cost of $700,000 within the 2018- 2027 timeframe. As an update did not occur within the five year window of the current Development Charges By-law, it is being restated in the upcoming 2022 Development Charges Background Study process. Staff anticipates that the update will be initiated within the next five year window of 2022-2027, subject to Council approval of the funds through the annual budget process. ENG 05-22 March 28, 2022 Subject: City of Pickering Frenchman’s Bay Stormwater Management Master Plan – Status Update Page 6 Attachments: 1. Council Resolution #780/22 Prepared/Approved/Endorsed By: Original signed by: Richard Holborn, P. ENG. Director, Engineering Services RH:mjh Recommended for the consideration of Pickering City Council Original signed by: Marisa Carpino, M.A. Chief Administrative Officer Attachment #1 to Report #ENG 05-22 Legislative Services Division Clerk’s Office Directive Memorandum February 1, 2022 To: Richard Holborn Director, Engineering Services From: Susan Cassel City Clerk Subject: Direction as per Minutes of the Meeting of City Council held on January 24, 2022 Corr. 03-22 David Steele City of Pickering MMM Storm Water Management Plan Council Decision Resolution #780/22 1.That Corr. 03-22, from David Steele, dated December 31, 2021, regarding the City of Pickering MMM Storm Water Management Plan, be received; and, 2.That staff be directed, through the CAO, to report back to Council on the status of the City of Pickering Storm Water Management Plan no later than the March 28, 2022 Council meeting. Please take any action deemed necessary. A copy of the original correspondence is attached for your reference. Susan Cassel Copy: Chief Administrative Officer