Georgetown Water Storage Class Environmental Assessment Study

Transcription

1 Georgetown Water Storage Class Environmental Assessment Study Public Information Centre Cedarvale Community Centre Main Street South Thursday, September 4th, :30 p.m. 8:30 p.m.

2 Why are we here? Halton Region is completing a Class Environmental Assessment Study to address water storage requirements in Georgetown to meet current demands of existing customers, as well as future demands of planned growth within the existing Georgetown urban boundary and the Hamlets of Stewarttown, Glen Williams and Norval. Rehabilitation of the existing Todd Road elevated water tank is necessary for the tank to comply with current safety standards and codes. The purpose of this study is to identify any upgrades, replacement and/or expansion requirements of the water storage facilities in Georgetown in order to establish the preferred solution to provide the necessary water storage capacity. 2

3 What is the purpose of this Public Information Centre? As part of the Municipal Class Environmental Assessment (Class EA) process, the public is invited to participate and provide comments on the study before any final decisions or recommendations are made. This PIC provides the public with the opportunity to: Understand the need for this project and review background information Review the alternative solutions considered to address the storage requirements in Georgetown Provide input in the evaluation methodology and criteria used to assess the alternative solutions Provide comments on the preliminary recommended alternative solution presented tonight Review and discuss the project with Region staff and their consultants, and any concerns you may have related to the study Public participation is an integral part of the study process. We encourage you to provide us with any comments or concerns which you may have. 3

4 Overview of the Municipal Class EA Process NEXT STEPS July 2008 July - August 2008 September 4, 2008 Sept. Dec /2010 Notice of Study Commencement Newspaper Ad Problem/ Opportunity Identification Project Background Study Area Alternative Solutions Evaluation Criteria Evaluation of Alternatives Assessment of Impacts & Mitigation Measures Identify Preliminary Preferred Solution Public Information Centre Consult with Review Agencies and Public We are here Receive Comments Confirm Preferred Solution Prepare Project File Report Seek Council Approval to File Report Notice of Study Completion Begin the 30-day Review Period Address any Part II Orders Complete Detailed Design Obtain Necessary Approvals Selection of Contractor Commencement of Construction This project is being undertaken in accordance with the requirements for Schedule B undertakings. 4

5 Georgetown Water Supply System 22 nd Sideroad In-ground Reservoir - 8,000 m³ - The Georgetown Water Supply System provides water to the Georgetown Urban Area, and the Hamlets of Stewarttown, Norval and Glen Williams. Silver Creek GLEN WILLIAMS Credit River - The groundwater source is obtained from three well fields; Cedarvale, Princess Anne and Lindsay Court. Todd Road Elevated Water Tank - 2,270 m³ LEGEND: URBAN BOUNDARY HAMLET - Groundwater from the Cedarvale wells is treated at the Georgetown Water Purification Plant, whereas water from the other wells is treated at the well fields. STEWARTTOWN EXISTING WATERMAIN RESERVOIR WATER PURIFICATION PLANT ELEVATED WATER TANK STANDPIPE WELL BOOSTER PUMPING STATION - The existing distribution system comprises 177 km of watermain ranging in size from 150 mm to 500 mm, the Moore Park Booster Station, and three separate water storage facilities: nd the 22 Side Road In-ground Reservoir, the Todd Road Elevated Tank; and the Norval Standpipe. Georgetown Water Purification Plant Rated Capacity 8,640 m³/d Sixteen Mile Creek Norval Standpipe 795 m³ NORVAL Levi's Creek 5

6 Project Background Existing Conditions - Todd Road Elevated Tower Water storage in the Georgetown water distribution system is provided by the Todd Road Elevated Tank, the 22nd Sideroad Reservoir and the Norval Standpipe. In August 2003, the Todd Road Elevated Tank developed a leak which was immediately repaired. Following this incident, a detailed inspection of the Todd Road Elevated Tower was completed. The inspection identified that the tower was generally in good condition and could continue in operation. It was also revealed that safety upgrades, functional, operational and site improvements were needed for the tower to comply with current standards. Water storage studies completed for Georgetown have identified that additional water storage is required to meet the current needs of existing customers, as well as accommodate planned approved growth within the Georgetown urban boundary from 38,869 to 48,958 by the year 2021 (residential population). The current employment population of 12,291 is not expected to change significantly by Residential Population (Georgetown & Hamlets) 51,000 49,000 47,000 45,000 43,000 41,000 39,000 37,000 35, Year 6

7 Georgetown Water Supply System Water Demands and Storage Treated water storage facilities are sized to meet the maximum day demands during the day and during fire flow and emergency conditions. Water storage requirements for the Georgetown Water System have been estimated based on existing water consumption trends and planned growth within the existing urban boundary. The existing storage facilities provide a total water storage volume of approximately 11.1 ML. Additional water storage is needed in order to meet the water demands for the existing serviced population as well as the demands of the approved growth. Year Required Storage Volume (ML) Total System Max. Day Demands (ML/day) Additional Volume = 2.7 ML Fire Storage Equalization Storage Proposed Total Storage =13.8 ML Storage Requirements (ML) Storage volume required based on water demands Current Storage =11.1 ML Emergency Storage Total Storage Year Storage Deficit (ML) % Contingency Storage 7

8 Water Storage Alternative Solutions Five different water storage alternative solutions were developed with consideration given to preliminary screening criteria that include: Use of existing storage facilities Proximity to existing infrastructure Additional storage volume has to provide security of supply Option must provide at least the existing level of service Within or in close proximity to the Georgetown urban boundary Suitable topography in order to maintain adequate range of pressures in the distribution system Minimal impact on residential/commercial areas Minimal environmental impacts 8

9 Water Storage Alternative Solutions Graphic Description 9

10 Evaluation Criteria The following criteria were used to assess and score the water storage alternatives. The criteria were divided into five main groups: natural, socio-cultural, technical, legal/jurisdictional and economic environments. NATURAL Potential impacts to existing natural features (i.e. watercourses, wetlands, woodlands, greenlands, wellhead protection zones, protected countryside areas, etc.) LEGAL ISSUES Land availability/property acquisition Requirement for permits and approvals from regulatory agencies Compatibility with existing and future land uses Evaluation Criteria SOCIO-CULTURAL Impacts in terms of visual effects, shadow effects, noise, dust and vibration to residential and business areas Impacts to existing traffic conditions Impact to archaeological features Aesthetic issues Public Perception TECHNICAL ISSUES Ability to use existing infrastructure Ability to provide the same level of service as a minimum under all conditions, including fire and emergency scenarios System security Constructability Requirement for additional watermains Potential conflict with underground utilities ECONOMIC Estimated capital construction cost Operation and maintenance, and life cycle costs Cost for property acquisition 10

11 Existing Conditions Georgetown Urban Area and Hamlets Natural Heritage Features Land Use Designations 11

12 Summary of Alternatives Evaluation 12

13 Preliminary Recommended Water Storage Solution Based on the evaluation of the 5 different options, the preliminary preferred water storage solution for Georgetown is: Option 4.1: Build a new larger (5,000 m 3 /1.1 MIG) elevated tank on the site adjacent to the existing Todd Road Elevated Tank. The recommended site is a privately owned lot adjacent to the existing tower. The property owner has expressed a willingness to exchange land with the Region. Negotiations would have to be finalized. This option presents negligible impact to the natural environment as the proposed new site is deprived of any vegetation other than overgrown grass. This option makes use of the existing infrastructure, minimizing the need for additional watermain looping. Minimal impact to the socio-cultural environment as construction will be confined within existing property limits and outside residential areas. Proposed location for the new tower is desirable in terms of providing adequate pressures in the distribution system with acceptable associated energy costs. New site reduces technical complexity during construction in terms of continuous operability of existing tower and less conflict with existing utilities. New configuration of the bulk water depot will provide safe access and/or parking for users. New larger tank will provide improved residual pressures under emergency fire conditions. Proposed concept for new tank will improve the aesthetic appearance of the storage facility. Todd Road Mountainview Rd S Existing Todd Road Elevated Tank Preferred Location for New Larger Tank 13

14 Proposed Conceptual Elevated Tank - Layout and Preliminary Design Preliminary Site Plan for New Elevated Tank Perspective View 14

15 Anticipated Impacts and Mitigation Measures Potential Anticipated Impacts Due to the small footprint required for the new tank and the lack of existing natural features in the proposed site, the impacts to the natural environment are expected to be negligible; however, site clearance for construction of the new tower will involve disturbance to grassed areas. Some temporary and localized impacts in terms of noise, vibration, dust, mud and traffic increase resulting from construction of new elevated tank and demolition of existing tank. Spills of hazardous materials during construction (e.g. fuels, hydraulic fluids) Demolition of existing Todd Road Elevated Tank requires removal of existing communication satellites and antennas. Potential to impact archaeological features. Construction of the new elevated tank will have an overall positive impact to the surrounding areas, since proposed architectural concept is more aesthetically pleasing than the existing tank. Proposed Mitigation Measures Disturbed areas will be restored to original or improved conditions as soon as construction is complete. Construction equipment will be operated as per the Town of Halton Hill s Local Noise by-law. Adjacent businesses will be notified in advance of construction and provided with the Region contact information should they encounter any problems during construction. Temporary construction walls or fencing around construction areas to minimize noise, dust, mud and visual impacts. Standard best practices for vehicle and pedestrian safety will be used throughout the construction areas. Standard sediment and erosion control measures will be implemented during construction to minimize effects from spills. Contractor to have designated fuel filling station and spill clean-up kits on site. Coordination with satellite owners for removal and relocation of existing satellites and antennas will be carried out. The necessary archaeological assessments will be completed prior to project implementation to assess the potential risk of impacts to archaeological features. Existing conditions (lack of watercourses in the area) and current land use designations indicate minimal potential for the presence of archaeological remains. 15

16 Typical Elevated Water Tower Construction Process Excavation of tank foundation. Placement of reinforcing steel in tank foundation. Pouring lift #4 of the concrete support pedestal. Placement of wire mesh reinforcement in pedestal wall. Erection of top formwork for concrete pedestal. Erection of steel cone and wall plates around base of pedestal. Application of exterior protective coating system by roller at ground level. Hoisting of steel tank from top of pedestal. Completed concrete support pedestal and steel tank. 16

17 Expected Elevated Tower Demolition Process City of Brantford 50,000 gallon tank removal 17

18 Project Contacts Please complete a Comment Sheet and leave it here today, or return it to Halton Region by Friday, September 19, For more information about this project, or to view the Public Information Centre displays online Please visit our website: Should you have any questions or concerns at any time during the project, please contact either of the following individuals: Ms. Tanya Parr, C.E.T Mr. Tom Montgomery, P.Eng Special Projects Technologist Project Manager Halton Region UMA Engineering Ltd 1151 Bronte Road, 509 Mill Street Oakville, ON, L6M 3L1 Kitchener, ON, N2G 2Y5. Telephone: , Ext Telephone: ext. 222 Facsimile: Facsimile: Tanya.parr@halton.ca tom.montgomery@uma.aecom.com 19