Preferred Elevated Tank Site - Region of Peel - Working ... · PDF fileNorth Bolton Elevated Tank/Reservoir and Feedermain Class EA Preferred Elevated Tank Site ... detailed design

North Bolton Elevated Tank/Reservoir andFeedermain Class EA

Preferred Elevated Tank SitePreferred Site No. 3 is on private property owned byHopewell Developments.

Approximately 5 acres of land will be required,including lands required for a permanent access roadand feedermains to the new elevated tank.

The new elevated tank structure will consist of awelded steel storage cell supported on a reinforcedconcrete shaft, with a working capacity of 9.0 ML.

The tank and shaft diameters will be approximately 32m and 18 m, respectively, and will have a top waterlevel of 297.4 masl (the same as the existing elevatedtank) in order to maintain pressures in the distributionsystem, resulting in an overall tower height ofapproximately 44 metres.

A tank drainage/overflow detention area with acontrolled outlet is also proposed, to limit thedischarge of peak flow from the elevated tankoverflow. The tank will be connected to the existingwatermain, storm, sanitary, gas, hydro and phoneutility infrastructure on Coleraine Drive.

A paved driveway access and parking area will alsobe constructed on the site, but should have negligibleimpact on the existing runoff characteristics for thesite.

A TEMPORARY WORKING EASEMENT of approx. 2acres will also be required across the Hopewell siteduring construction period.

View from Coleraine Drive looking north towards the existing tank on the east side and proposedelevated tank on the west side

Preferred Site No. 3 - Hopewell Developments –Conceptual Layout of Elevated Tank Site

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Typical Elevated Water Tank Construction Process

Excavation of tank foundation Placement of reinforcing steel in tankfoundation

Pouring lift #4 of the concrete supportpedestal

Placement of wire mesh reinforcement inpedestal wall

Erection of top formwork forconcrete pedestal

Erection of steel cone andwall plates around base of

pedestal

Application of exterior protectivecoating system by roller at ground

level

Hoisting of steel tank fromtop of pedestal

Completed concrete supportpedestal and steel tank

Photographs taken during construction of a similar Elevated Water Tank project in Milton, Ontario

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Alternative Feedermain RoutesOption 1: Predominantly along Future Bolton Arterial

Road (BAR), Highway 50Estimated Capital Cost: $42 million *Longer feedermain lengthSeveral trenchless crossings through valley landsTiming issues associated with construction of BARNo opportunity for community enhancement

Option 2: Predominantly though potentially sensitiveHumber River Valley Forest Lands

Estimated Capital Cost: $30 million *Significant environmental impactsHigher Risk in the event of feedermain breakObtaining approval from the TRCA likely a challengeNo opportunity for community enhancement

Option 3: Predominantly though Bolton core, Highway 50Estimated Capital Cost: $24 million *Less environmental impact; shorter feedermain lengthand construction to occur within road right-of-wayPublic coordination requiredOpportunity to coordinate with other developmentprojectsTemporary traffic disruption however, will providepermanent community enhancement (i.e. pavementrehabilitation on local roads, etc.)

*Plus the cost of elevated tank $8.5 million (excludingland acquisition)

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Several Alternative Feedermain OptionsSeveral Alternative Feedermain Optionsthrough Bolton Core were Evaluatedthrough Bolton Core were Evaluated


Preliminary Preferred Feedermain AlternativePermanent and Temporary WorkingEasement Details (Schematic only)

Bolton Core Parking Lot

Preferred Feedermain Option No. 3Through Bolton Core

Senior Housing (KingNursing Home)

Condominiums

From Hwy-50 Looking westat the Bolton Core ParkingLot (towards condominiums)

• Feedermain Option No. 3 is the Preliminary PreferredFeedermain Alternative.

• The feedermain will be installed within the existing roadallowance; along Coleraine Drive north to King Street, easton King Street to Temperance Street, north on Temperanceto Sterne Street, east on Sterne through the parking lotthrough the Black Bull Pub to Highway 50/Queen Streetand north to Columbia Way.

• A connection point to the existing system would occur atthe corner of Columbia Way and Kingsview Drive.

• The 600mm/400mm (24”/16”) diameter feedermain willextend approximately 5.0 km from the elevated tank, buriedto provide a minimum cover of 1.8 metres.

• The feedermain will be installed within the existing roadallowance in a vertical trench, utilizing a trench box tominimize environmental impacts and site disruption.Concrete trench plugs will be installed to preventgroundwater migration along the pipeline.

• The feedermain crossing the Humber River will becompleted via trenchless methods to minimizeenvironmental impacts.

• Coordination with the Town of Caledon and traffic controlmeasures will be required for the installation of thefeedermain through the Bolton core.

• Traffic detours will be required, however, construction willremain out of the main Highway 50/King Street intersectionto provide alternate movement through Bolton core area.

• Flexibility to stage construction and accelerate certainareas.

• Temporary disruption to traffic flow and use of parking lot,however enhancements to area will be permanent

• Co-ordination with the public will be required. From Hwy-50 Lookingtowards Humber River

• Acquisition of Private property will berequired for the installation of thefeedermain through the Parking lot, asshown in the Permanent and TemporaryEasement Details figure above.

Construction Staging AreaFor Trenchless Crossing

Potential Shaft Locations

Trenchless Crossing

Potential ShaftLocations

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Overview of Construction Methods

CONSTRUCTION METHODS

There are two methods that can be used to construct thefeedermain they are:

– Open Cut Method– Trenchless Method

OPEN-CUT METHOD

Generally used when depth is less than 10 m, otherwisetrenchless used:Protection and/or relocation of existing utilitiesRemoval of soil from trenchPlacing of imported bedding material and pipeBackfilling of pipeTemporary restoration of roadConstruction of line valves and chambers at selectedlocationsFinal restoration of roadAs most of the feedermain is within the road right-of-way,where there are existing utilities, the proposed feedermainwill have to be installed below the existing utilities.Open cut construction will be a minimum of 5.0 m deep andwill be carried out using a trench box to avoid completelytearing up the existing road.

TRENCHLESS METHOD (Humber River Crossing)

The feedermain crossing the Humber River will becompleted via Trenchless method to minimize environmentalimpacts.Define construction staging areas and excavation of entryand exit shaftAdvancement of trenchless excavation using an electricTunnel Boring Machine (TBM) or Horizontal DirectionalDrilling (HDD)Removal of soil through the shaftsInstallation of feedermainOnce the feedermain is constructed the shaft sites will bereturned to original condition

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Actions to Limit Construction Impacts

TRAFFIC MANAGEMENT

A traffic plan (for exit and entry shaft locations) willregulate construction traffic. For pedestrian safety,hoarding is to be installed around construction site areas.For open cut construction, closure of traffic lanes,identification of detours and temporary access routes, willminimize the impact to property owners and commuters

NOISE

Restricted hours of operation, per Town of Caledon noiseby-lawHoarding around construction sitesUsing mufflers and other noise-reducing features ofconstruction equipment

AIR QUALITY

Standard dust reductions measures to include:Keep on-site truck movements to a minimumMaintain truck wheel cleaning stations at eachconstruction siteClean and wash streets adjacent to the constructionareasUse MOE approved chemical binder dust suppressantas circumstances warrant

NATURAL FEATURES

During construction:Install sediment and erosion controls throughout theconstruction areaMinimize vegetation removal within route alignment tothe extent possiblePrune damaged roots and branches appropriatelyReplace any trees to be removed with similar vegetationRemove all stockpiles upon completion of the works andthe sites restored

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Traffic Management

As construction of the feedermain progressesalong the recommended route, there will betraffic disruptions.Open cut construction will require laneclosures (100-200 m stretches) that advanceas the pipe is installed.Access to properties will be maintained at alltimes.Proposed mitigation measures include:– Use of traffic diversions to maintain level

of service;– Advance notification signage.

Public notification will be continued duringdetailed design and construction to keep youinformed of what will be happening and when.Adjacent businesses, residents, senior’shome and community services (i.e. EMS, fire,school boards) will be notified in advance ofthe timing of construction.

King Street

The proposed watermain on King St. will be installed on:– North-side from Colerain Dr. to HESP Dr.– South-side from HESP Dr. to Temperance St.

Temporary lane closure during construction as shown inthe figure above will be maintained, in accordance withOntario Traffic Manual - Book 7.Pedestrian sidewalk along King Street will be maintainedduring construction.Access to intersecting roadways will be maintained duringconstruction.Access to local residences and business will be maintainedat all times.Emergency vehicle access will be maintained at all times.Expected construction duration: 3 to 4 months.

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Traffic Management (Cont’d)Queen St. N. / Highway-50

The proposed watermain will be installed mostly on thewest side of Hwy-50.Temporary partial lane closure and lane shift as shown inthe figure above will be maintained during construction inaccordance with Ontario Traffic Manual - Book 7.Two-lane northbound and one-lane southbound will bemaintained at all times.Centennial Drive South Access will be temporarily closed.Access to local residences and business will bemaintained at all times.Pedestrians to use east side of Queen Street/Hwy-50during construction.Emergency vehicle access to be maintained at all timesExpected construction duration: 3 to 4 months.

Bolton Core Parking Lot

Work zone to be fenced and temporary road workcondition to be in accordance with Ontario Traffic Manual -Book 7.Access to staging zone areas to be determined duringconstruction.Access to the parking lot to be maintained at all timesduring construction. Entrance from Queen Street to betemporarily closed during drain chamber construction.Contractor to arrange proper parking location for crew andconstruction vehicles outside the business parking area.Access for pedestrians and emergency vehicles tobuildings will be maintained at all times.Expected construction duration: 3 to 4 months.

Proposed 400mm dia. Feedermain

Hwy-50

Approx.Limit ofWork Zone

Shaft for DrainChamber

Ann St. Proposed 400mm dia.Feedermain

Proposed Shaft fortrenchless crossing

Timothy St.

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Impacts and Mitigation

Potential Anticipated Impact Proposed Mitigation Measures

Due to the small footprint required for the new elevated tank and the lack ofexisting natural features in the proposed site, the impacts to the naturalenvironment are expected to be negligible; however site clearance forconstruction of the new tank will involve disturbance to agricultural area

• Disturbed areas will be restored to original or improved conditions as soon as construction is complete

Some temporary and localized impacts in terms of noise, vibration, dust, mud andtraffic increase resulting from the construction of new elevated tank

• Construction equipment will be operated as per the Town of Caledon’s local noise by-law. Adjacentbusinesses, residents, senior’s home and community services (i.e. EMS, fire, school boards) will be notifiedin advance of the timing of construction and provided with Region contact information should they encounterany problems during construction

• Temporary construction walls or fencing around construction area to minimize noise, dust, mud and visualimpacts

• Standard best practices for vehicle and pedestrian safety will be used throughout the construction area

Spills of hazardous materials during construction (e.g., fuels, hydraulic fluids) • Standard sediment and erosion control measures will be implemented during construction to minimize effectsfrom spills

• Contractor to have designated fuel filling station and spill clean-up kits on site

Potential to impact cultural resources • Archaeological assessments will be completed prior to project implementation to assess the potential risk ofimpacts to archaeological features

Crossing of Humber River using trenchless methods on fish and fish habitat • Impact will be avoided by use of trenchless methods under watercourse

Minimal traffic impact at entry and exit shaft locations • Controlled access to shaft areas• Construction will be fenced off and shaft areas enclosed

Potential impact to through traffic during Feedermain installation • Most of the feedermain will be constructed using open-cut methods within the existing right-of way• Traffic control measures will be implemented• Staged construction will reduce impacts• Emergency services will not be disrupted

Limited use of parking lot in Bolton core • Parking use will return to normal upon completion of project• Use of signage to direct auto and pedestrian traffic to alternative routes• The potential contractor will be required to maintain access to the parking lot at all times• Also Construction vehicles and personal vehicles of construction crew will not be allowed to use the parking

lot

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Next Steps

Following this Public Information Centre, the Project Team will:

Receive and incorporate comments from the public and agencies until January 12, 2011.If no significant comments are received following this PIC, the Project Team will proceed tofinalize the preferred elevated tank site and feedermain route and complete theEnvironmental Study Report (ESR) in early 2011.Notices will be placed in local newspapers to announce where and when the EnvironmentalStudy Report will be available for a 30-day public review period and will advise the public ofits rights to requesting a Part II Order under the Ontario Environmental Assessment Act. If nosignificant issues arise, the Region will proceed with implementing the Study.Construction is scheduled to begin in 2011.

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Project Contacts

THANK YOU FOR ATTENDING THISPUBLIC INFORMATION CENTRE!

Please complete a comment sheet and place it in the box provided or send it back to the addressshown on the form. Your comments will be considered in the assessment and evaluation of thepreferred Elevated Tank site and Feedermain alignment.

‘Comments Forms’ are provided for your convenience and may be completed here or returned byJanuary 12, 2011.

Chris Hamel, P.EngConsultant Project ManagerAECOM105 Commerce Valley Drive West, 7th FloorMarkham, ON L3T 7W3Tel: 905.886.7022Fax: 905.886.9494Email: [email protected]

Italia Ponce, P.Eng.Project ManagerThe Regional Municipality of Peel10 Peel Centre DriveBrampton, ON L6T 4B9Tel: 905.791.7800 ext. 4583Fax: 905.450.0728Email: [email protected]

OR

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Documents

Preferred Elevated Tank Site - Region of Peel - Working ... · PDF fileNorth Bolton Elevated Tank/Reservoir and Feedermain Class EA Preferred Elevated Tank Site ... detailed design