P/2014/00693Received 02/06/14OUTWOODS NR 1 SERVICE RESERVOIR RECONSTRUCTIONPRE - CONSTRUCTION METHOD STATEMENTIssue 01Page 1 of 9May 2014PRE - CONSTRUCTION METHOD STATEMENTContentsIntroduction o Indicative scope of work itemsGeneralPlanning and ProgrammingSite InvestigationSite LogisticsSite ManagementSecurity and Site establishmentPersonnel Safety InductionSite Access and DeliveriesSignageMovement and Hoisting of MaterialsStorage and HandlingWaste ManagementScaffoldingTemporary ServicesDust and DebrisNoise ControlSafetyConstruction o General o Initial Work o Demolition o Groundworks o Structure o Valve house Mechanical & Electrical Works o External WorksProject ReportingCleaning, testing, disinfection and commissioningHandover documentation and Client TrainingContract Administration and HandoversPrepared by:Alan D Rogers BSc (Hons), MCQI, CQPSupervising Engineer Reservoirs Act 1975Issue 01Page 2 of 9May 2014IntroductionThis Construction Method Statement (CMS) has been prepared to support theplanning application for the reconstruction of Outwoods Nr1 Service Reservoir.Location: Reservoir Road, Outwoods, Burton upon Trent DE14 2BPNGR: SK 2286 2405The works briefly comprises the demolition of an existing Victorian brick servicereservoir and the design and construction of a new reinforced concrete servicereservoir (nominal capacity 18,000 m3non Statutory Reservoir under the existingReservoirs Act 1975) together with new integral valve house.The tendering stage and appointment of principle Design and Construct Contractor isnot yet completed.Indicative Scope of work items includes:DesignTraditional in-situ reinforced concrete reservoir construction, with 2 equalcompartments, to SSW Performance Specification based upon Euro codes.DemolitionExisting Victorian reservoir built 1882 (capacity 18,230 m 3) is brickconstruction with barrel vaulted roof supported on cast iron columns andwrought iron beams with mass concrete floor slab.ExcavationTo formation level for foundations, under drains, pipework and drainage asrequired.ConstructionFoundations, walls and columns, roof and floor slabs, division walls, valvehouse, backfill and formation of earth embankments.M&ESupply and Installation of Pipework, valves, NRVs, actuators, electricalpanels, LED lighting, Security doors to valve house, SS Submarine accessdoors to tank, ventilation ducts, SS handrails, galvanised steelwalkways/stairways.DrainageRoof drainage, roadway drainage, reservoir overflow and scour drainconnections.RoadwaysAccess road to be extended and turning/parking area to be provided at valvehouse.Issue 01Page 3 of 9May 2014LandscapingProfiled reservoir earth embankments to be grass seeded, gravel to the roof,tree planting for site screening.Testing and CommissioningFinal pipework connections, flushing, cleaning, drop testing, sampling.Challenges for Construction Team identifiedVery steep public access roadway shared with residents and a PrimarySchool and Nursery at a busy road junction. Working safely within an existingconfined operational site.Maintaining good relationship with school andneighbouring residents.The scheme will provide potable water storage serving customers in theBurton water supply zone for the next 80 100 years.GeneralThis Construction Method Statement (CMS) sets out proposed measures tominimise and mitigate construction impact on the neighbouring community andobjectives for the management of the site during the construction phase.The CMS will remain under review during all stages of the project and certain areasof operation will be the subject of specialist considerations. The Principal contractorand CDM Co-ordinator will be appointed for the whole construction phase includingDesign and commissioning. More specificand detailed method statements and riskassessments relating to these operations will be provided at a later stageand as theproject proceeds. These additional method statements and risk assessments willcomply with therequirements of the relevant regulatory bodies and will be preparedby the specificcontractors involved.Risk assessments and method statementscarried out by Contractors will be submitted to SSW and appropriate measures takento mitigate any risks to employees, contractors and public in accordance with TheConstruction (Design and Management) Regulations 2007 requirements.Planning & ProgrammeThe overall Project programme including design, demolition and construction isestimated to be completed within approximately 18months. The Principal contractorwill prepare a computerbased programme using Microsoft Project planning andproject management software or similar.The project managementsystem will analysecritical path and produce bar chartprogrammes that can incorporate design,designreviews, procurement, equipment/material orders, deliveries and siteinstallation period aspart of standard procedures.The construction programme will bemonitored, tracked and updated on a regular basis andany corrective action appliedas necessary.Site InvestigationA topographical survey has been carried out to confirm theexisting site levels, extentof any existing services and the condition of the existing environs. Services havebeen plotted on drawings and a photographic record taken, which will bemaintainedas a record throughout the stages of the contract. Geotechnical investigation hasalso been carried out to determine detailed ground conditions to support theIssue 01Page 4 of 9May 2014reservoir and foundation design. The geothechnical investigation has not identifiedany significant problems with construction of the reservoir foundations. At this stage,it is not envisaged that any specialist groundworks will be required as part of thereservoir construction work.Notification of the project commencement will be issued to all Statutory Authorities,including CDM notification to HSE, advisingthem of the construction works andadvising them of the proposed programme of works.A phase 1 Environmental habitat site survey has been completed and will besubmitted as part of the planning application.Site LogisticsThe way in which the site is established and managed is critical to the success of theproject.The Principal contractor will be responsible for preparation of a site accessplan identifying areas for unloading, storage of materials and waste, vehicle parking,accommodation and messing facilities etc.Methods of unloading using crane and/orfork lift plant will also be detailed showing methods of lifting and horizontal materialmovement facilities during the construction period. Loading towers will be erectedadjacent to the external elevation for the forklift truck totransfer materials to the rooflevel.Mobile elevating platforms will be utilized, where conventional scaffolding isunsuitable, toprovide access and erection of various elements.Site ManagementThe site management for the project will comprise a permanent full time site basedProject Managerwhowill lead the site team and administer the contract. The ProjectManager will be assisted and supported by various site basedconstructionManagement personnel, responsible for themanagement and supervision of thesite-based operations.The site team will be supported and assisted by additional officebased staff includingenvironmental, planning, temporary works, health and safetymanagers and the Project CDM Co-ordinator.Security and Site EstablishmentHeras fencing or plywood hoarding or will be erected on the site boundary withReservoir Road to secure it during the contract period. Additionally, Heras fencingwill secure the work area inside the site boundary.The working area will be within theexisting site boundary and areas of site will remain fully operational and visited bySSW staff throughout the construction period. Site office and welfare facilities will beestablished. Temporary site accommodation and welfare will comprise of the ProjectManagers office,Meeting and Induction room, Welfare facilities and will beerected onhard standing within the contractors working area.Further accommodation for sub-contractors will be sited as required and the meeting roomwill be available for theClients representatives when visiting the site.Personnel Safety InductionsAll personnel will be inducted prior to gaining access to the site. They will beinformed of thespecific site rules required in the preliminaries relating to this projectas well as South Staffs Water site rules for contractors, health and safety policy andtheir own companies risk assessments and method statements.Issue 01Page 5 of 9May 2014Site Access and DeliveriesVehicular and pedestrian access to the site compound will be from Reservoir Road.Delivery vehicles will be provided with directions ontothe site and be required to turnoff engines to avoid nuisance upon arrival. No parking on street in Reservoir Roadwill be permitted.A delivery vehicle lay-by and wash down area will be provided atthe entrance of the sitecompound.Site access and deliveries must be avoided during the busy Shobnall Primary Schoolset down and pick up times (08:35 09:15 and 15:10 15:50hrs).Considerationmust also be given to Tiddlywinks Nursery at the junction of Reservoir Road andShobnall Road whose opening hours are Monday to Friday 07:3018:30hrs andparents drop off and collect children at various times between openinghours.Delivery constraints will be identified to all suppliers and trade contractors.Deliveriesof materials, plant and equipment will be strictly controlled and co-ordinatedtoprevent congestion and disruption to traffic using Reservoir Road and ShobnallRoad junction.SignageAdequate signage will be installed such that vehicle deliveries and access to the siteareclearly defined within the general site geographical area.A main constructionsignboard will be positioned in agreement with SSW.Site signage will be providedwithin the curtilage of the site as necessary to adviseoperatives/visitors and deliverystaff of safety requirements within the confines of the site andwhere to report onarrival. Such signage will include: -Accommodation / Access requirementsSpeed LimitsOverhead / Underground ServicesSafety Helmet, high visibility work wear and footwear requirementsNoise and any requirements for ear protectionDanger Construction Site, etc.Movement and Lifting of MaterialsCrane and Hoisting provisions will be as detailed within specific risk assessment andmethod statements. All vehicle movements and deliveries will be subject to thecontrol of the Principal contractor.The storage of materials on site will be kept to anabsolute minimum and therefore deliveryscheduling will be carried out to ensuresupply is on a just in time basis only.All concrete and screed deliveries are anticipated as ready mixed and will bedelivered tosite in appropriate vehicles.Concrete and screed placement techniqueswill be changed and adapted to suit the locationand suitability of the equipment for itsplacement.Storage and HandlingThe contractors site area will provide the storage area for all plant and materialsdelivered tosite.More vulnerable materials/equipment will be stored in the securecontainers, or programmed on to site to be incorporated directly into theconstruction.Issue 01Page 6 of 9May 2014Waste ManagementA waste strategy will be developed during the pre-commencement period. ThePrincipal contractor will produce a Site Waste Management Plans (SWMP) for thisProject with the objective of working towards better understanding wastemanagement so the volume ofwaste to be disposed is reduced and segregationenables as much as possible to be recycled.ScaffoldingConventional scaffolding, where required, will be independent with boarded lifts tosuit thenature, location and type of the particular operations.All scaffolding will besecurely tied to the structure and will include suitable ladder access.Scaffolding willbe provided, erected and maintained in accordance with all currentstatutoryregulations.Suitable guard railing will be utilised to prevent falling fromunprotected edges of theexcavations, upper floors and staircases as applicable.Noperson other than certified competent scaffold erectors will be permitted to erect,alter, adapt ordismantle any conventional scaffolding.Temporary ServicesPower supply will be provided by a generator or temporary power supply from theexisting pumphouse. 110v power tools will be utilised throughout construction.Waterwill be provided direct from the mains system for use in the welfare facilities.Fax,telephone lines and an electronic data transfer line will be provided to the site officesas required by the Contractor.Dust and DebrisThe site will be kept clean and tidy at all times and will comply with anystatutoryrequirements.Particular attention will be given to preventing thecontamination of adjoining roadways andexisting water courses. Wheel washing ofHGVs leaving site and roadsweeping will be carried out as required.Noise ControlManagement of noise pollution and vibration control will be given a high priority.Where theworks are in close proximity of occupied buildings the Contractor willensure that targeted acceptable levels of noise are adhered to as well as statutorylevels or any imposed by the Environmental Health Officers.SafetyManagement and execution of the project will be fully compliant withtherequirements of the Construction Design and Management Regulations 2007 andPrincipal contractor and an independent CDM Co-ordinator will be appointedthroughout construction from commencement of the Design stage to commissioningand handover.The Health and Safety file will be maintained and available throughoutthe construction phase. All contractors will be required to provide safety policies,plans and method statements andwill be assessed prior to order placement on allaspects of safety, health and welfare.All contractor and subcontractor employeesshall be checked for competency and complete a Health and Safety Site Inductionbefore commencement of any work on site. The site will be subject to independentsite safety checks, inspection and reports by ourindependent site safety inspectorsand advisors.Issue 01Page 7 of 9May 2014Construction General The Principal contractor will produce amaster programme indicating proposed timing and sequencing of operations necessaryto achieve project completion.Initial WorkPrior to the commencement of the project works, the preliminary Health andSafety Plan will be prepared. This plan will be progressively refined anddeveloped as other specialist sub contractors are appointed, and morespecific and detailed methods,techniques and requirements areestablished.The Contractors offices and welfare facilities will be set-up withinthe contractors site designated work area.The temporary hoarding andfencing, will be erected around the sitebefore work commences andmaintained throughout the Project.DemolitionAny asbestos material in the existing reservoir, identified by survey beforecommencement, will beremoved by a specialist sub-contractor before thebuilding is demolished. Operativeswill be provided with appropriate personalprotective equipment to prevent injury from dustand abrasion. Noise and dustgenerated by the demolition works will be confined within thecontractors sitearea.All the demolition works will be undertaken by a specialistsubcontractor.Temporary screens or dust protection at existing door openingswill be provided within theexisting retained areas prevent the contamination ofsurrounding areas.GroundworksDemolition of existing structure, excavation for the foundation base slab andunder drains will be undertaken by tracked excavators. Construction of under-drain system will be followed by preparation for construction and placement ofreinforced concrete base slab. This will involve construction of blinding layerand erection of reinforcement matting. The ground floor slab will then be castin structural concrete once the under drainage has been completedandtested.StructureIt is anticipated that the contractor will use heavy articulated cranes to placeshuttering and steel reinforcement to the wall and roof structural elements.These will be cast using reinforced concrete either skipped or pumped intoposition. Walls will be cast progressively in suitable height lifts, from floor slablevel up to full height. Reinforced concrete columns, internal to the reservoirstructure, may be precast and located in place via the crane system.A mobile crane is likely to be used to erect the steel staircases, hoistequipment valves and pipework into the valve house structure.Valve house - Mechanical / Electrical ServicesA detailed fabrication, delivery and installation schedule will be prepared bythe Mechanicaland Electrical contractor, upon instructions to proceed, toensure compliance with the overallcontract programme. Builders workrequired for the new services will be defined at this stagefor inclusion on theIssue 01Page 8 of 9May 2014structural engineers construction drawings.Installation of light fittings,smoke/heat detectors and intruder alarm systems will be co-ordinated withother works. Key dates for power and watersupplies to be available within thebuilding will be identified on the programme.Testing and commissioning ofspecialist systems will be carried out by the specialist systemsupplier/installerand test certificates will be issued.External WorksThe hard and soft landscaping will be undertaken once the building envelopeshave beencompleted all access scaffolding has been removed.Project ReportingThe following will be tabled for discussion at each internal site meeting;The status and progress recorded against the contract programme. Current updatedConstruction Programme with, if necessary, actions for bringingworks into line withthe Construction programme. Weekly labour and plant returns.A rolling schedule ofapprovals of all Design, Detailing and Materials yet to beapproved. This schedule willbe updated on a weekly basis.A schedule of materials and projects manufactured offsite, with status of percentagemanufactured and anticipated delivery dates.Cleaning, Testing, disinfection and CommissioningFollowing construction works roof water testing, cleaning, drop testing, disinfectionand commissioning will be carried out out in accordance with SSW, DWI and CESWIspecifications and procedures.Handover Documentation and Client TrainingIn parallel with the construction phases, the handover of the project to SSWoperational staff will require development of H&S, operational and technicalinformation and procedures by the contractor and SSW project team.Contract Administration and HandoversThroughout the contract, the Principal contractorwill maintain the updated, trackedandmonitored Construction Programme for the works. In order to ensure that theprogramme isadhered to, the Principal contractor will hold regular on-site progressmeetings withsub-contractors. At these meetings, other issues such as quality andsafety will bediscussed in detail to ensure that they fully comply with the contractrequirements.Prior to handover of sections of works, the Principal contractor willcarry out their ownsnagging of the works, with the aim of minimum defects atpractical completion.As built drawings, commissioning records and operation andmaintenance manuals will beprepared and issued prior to completion of the works.Issue 01Page 9 of 9May 2014