Project Sheet Colwyn Bay Coastal Protection Scheme Phase 1 Colwyn Bay, North Wales, United Kingdom

PROJECT SHEET COLWYN BAY COASTAL PROTECTION SCHEME PHASE 1 COLWYN BAY, NORTH WALES, UNITED KINGDOM

BOSKALIS WESTMINSTER: SKILLS, FEATURES RESOURCES, EXPERIENCE Project Name Colwyn Bay Coastal Protection Boskalis Westminster provides clients with tailored, Scheme Phase 1 project-specific solutions for dredge related services, Client Conwy County Borough Council as illustrated by the following project summary. Contractor Volker Stevin - subcontracted to PROJECT DESCRIPTION Boskalis Westminster Ltd This high profile contract for Conwy County Borough Location Colwyn Bay, North Wales Council included the supply of material to renourish one kilometre of beach as part of Phase 1 of the Col- Execution period Mar - April 2013 wyn Bay Waterfront Project. The beach nourishment comprised the majority of the works and was completed by Boskalis Westminster under a subcontract to main contractor Volker Stevin.

Material was sourced from Westminster Gravels licensed winning Area 457, situated approximately twelve nautical miles from the site, beyond the Burbo Bank Wind Farm. The trailing suction hopper vessel ‘Barent Zanen’ dredged, transported and pumped the beach material ashore through a sinker pipeline over 1,500 metres long.

Logistical planning was a key challenge, with A mobilisation and preparation taking four weeks, plus a further two weeks for demobilisation, either side of the three week execution period. Due to the short A Location map window to undertake the work, potential delays due B Pipeline preparation at to weather and sea state were minimised by deliver- Pensarn C ing the pipeline to North Wales from Holland by 15km route from Pensarn to Colwyn Bay road on seventy lorries, each carrying sixty metres of pipe.

The assembly and fabrication of the 1548m sinker line was critical to the arrival of the ‘Barent Zanen’ and hence the timely delivery of the project. As there was limited beach available at Colwyn Bay, the pipeline was constructed on an alternative beach B at Pensarn, fifteen kilometres to the east. It was built

C 07 — 2012 The information contained in this data sheet is for guidance purposes only and may be subject to changes. © Boskalis. All rights reserved. suffering asignificantpumpfailure,the oftheworks.Despite‘BarentZanen’ delivery unplanned maintenanceremainarisktothe one atColwynBay, breakdownsand machinery programmes,suchasthe During intensedelivery CHALLENGES incident freeoperation. ground staffandbeachplantoperatorstoensurean communication wasmaintainedamongstthevessels, the pipelineduringlaunch,andconstantradio toprovideequalforces mately 250metresapart ground. Thefivevesselswerepositionedapproxi staffonthe vesselsonthewaterandthirty support requiring extensivedetailedplanningforthefive Launching ofthepipelinewasacomplexoperation sliding intothewater. welded togetherduringtheprocessofflotationand in twosectionsof966metresand582metres,then G E - COLWYN BAY, NORTH WALES, UK COLWYN BAY COASTAL DEFENCESPHASE1 local lifeboatstation. and soldtoalocalrecyclingcompany, withtheproceedsbeingdonatedto Scrap metalthatwasproducedduringthepipelinedemobilisationsorted established andupdatedbyConwyCountyBoroughCouncil. boards, presseditorialsandthroughtheproject’s own webpagethatwas community, regularupdateswere postedusingvariousmeansincludingnotice In ordertodevelopandmaintaingoodworkingrelationshipswiththelocal LOCAL COMMUNITY and reassembledfrombeingusedonatleastthreeearlierprojects. The sinkerpipelinewasutilisedinasustainableway, havingbeendelivered SUSTAINABILITY ANDTHEENVIRONMENT loadwasdeliveredwithintheoriginalprojectprogramme. project, afurther material and,althoughthevesselwasscheduledtocommenceanother Towards theendofproject,clientsecuredadditionalfundingforextra date. completed insixteenhoursandultimatelyhadnoimpactonthecompletion sufficientsparesonboard,therepairwas contingency planofcarrying H F www.boskalis.co.uk [email protected] F +441489578588 T +441489885933 United Kingdom Fareham, HampshirePO155SS WestSegensworth 4 CromptonWay Westminster House Boskalis Westminster Ltd H G F E

Barent Zanenpumpingashore Sandfill operations Donation to Pipeline operations RNLI