PROJECT SHEET ROOM FOR THE RIVER, THE PROJECTS FOR LOWERING RIVER WATER LEVELS

INTRODUCTION FEATURES As part of the 'Room for the River’ government Client Room for the River Program program, thirty flood-protection projects are (an alliance including Rijkswaterstaat ongoing in the Netherlands. At numerous (Dutch Directorate General for Public locations on the IJssel, , , Works and Water Management), , and rivers, more space is being provincial authorities, water authorities created for the water. A range of techniques are and municipal authorities). being applied, such as moving dikes, excavating flood plains, lowering summer beds and lowering Location Various groins. Boskalis was and is involved in a large Period 2006 - 2015 number of these projects. This project sheet gives a short description of a number of activities. Contractor Boskalis Nederland, in combination Alongside the projects mentioned here, Boskalis with various partners is also executing a large number of other Type of contract Various types of contract assignments, such as the projects ‘Grensmaas’, ‘Noordwaard’ and ‘IJsseluiterwaarden Olst’, and a range or larger and smaller works.

EXCAVATING THE FLOOD PLAINS NEAR DEVENTER With excavation work going on in the areas of Hengforderwaarden, Zandweerdplas, Bolwerksplas, Worp, Ossenwaard, and the Keizers- en Stobbenwaarden, the IJssel River in the vicinity of Deventer is being given more room, and leisure facilities are being created. Trenches are being dug over a distance of ten kilometers in the flood plains, allowing more water to flow through the river and reducing the risk of flooding. The Engineer & Construct project is being conducted by the IJsselfront consortium, which consists of Boskalis and Van Hattum & Blankevoort, who are responsible for the construction of a concrete retaining wall, a quay A wall, and changes to the piers of the Wilhelmina Bridge. The engineering firm Witteveen + Bos is A Deventer Project: aerial view of the work in the Stobbenwaarden area. providing support for the project. A total of 2.7 million cubic meters of soil, sand and clay will be moved, and the aim is to optimize the beneficial use of the soil. Some of the sand is ROOM FOR THE LOWER RHINE being taken by water to Urk, where Boskalis is The ‘Lower Rhine’ project is the first Plan, Design & Construct (PD&C) project in working on the construction of a aquatic hydraulic engineering, with the plan study, design and execution being 1,100-meter-long berm in the IJsselmeer as part integrated in a single assignment. As the director of the project, Boskalis takes of the construction of a wind farm. The fact that over a lot of work from Rijkswaterstaat. most of the material is not transported by road Our early involvement meant we could contribute ideas that saved time and was an important consideration for the client expense, and so the work was finished a year earlier than originally planned when it came to giving the assignment to by the client. There was collaboration with the engineering firm Grontmij in the Boskalis. A complicating factor is the presence of field of risk assessment and management. Considerable attention was paid to bombs from World War II, making clearance the spatial quality of each area. Nature and recreational areas are being operations necessary before the excavation of overhauled, and this includes the creation of footpaths and bicycle paths, and the area could start. The operations include parking areas, for leisure visitors. Work is going on in four areas. In the cutting off gas pipelines, shutting down road, rail Doorwerthse Waarden area, the summer dike will be moved. The bank will be and air traffic, and informing local residents. A lowered and cleaned up between the new dike and the river. Location Manager maintained contacts with the The storage place for stone from the local stone factory will also be moved. A parties concerned. new road will be built on the lowered surface for the offloading traffic going to 09 — 2014 The information contained in this data sheet is for guidance purposes only and may be subject to changes. © Boskalis. All rights reserved. Between Dalem and Dodewaard, 365 groynes Between DalemandDodewaard,365groynes water. unnecessarily largeobstacletothedischargeof recent years.Atpresent,theyconstitutean position ofthegroinsinWaal hasrisenin rate andtheerosionofnavigationchannel, As aresultoftheincreaseinriverdischarge They maintainthepositionanddepthofariver. discharge ofthewater, ice,gravel,sandandclay. ofregulatingthe interms They areimportant landscape. oftheDutch direction oftheriverandtheyarepart capacity oftheWaal. Groinsarebuiltacrossthe the directionofriver, raisingthedischarge replacedbydamsin being loweredand,inpart, Between GorinchemandNijmegen,groinsare LOWERING GROYNESINTHEWAAL RIVER and anature-friendlyriverbankwillbecreated. flooded. Thepresentwatercoursewillbewidened resulting inalow-lyingmeadowthatcanbe willbeexcavatedandcleanedup, stone factory storagesiteforstonefromanold At Elst,theformer with ahigherdischargecapacity. widened toensurethattherewillbeahealthyflow and Tollewaard areas.Theriverbedwillbe floodplains willbeexcavatedintheMiddelwaard land.The the floodfrequencyforfarming enough toensurethattherewillbenoincreasein the stonefactory. Thenewsummerdikewillhigh B C langsdam baak kribverlaging PROJECTS FORLOWERINGRIVERWATER LEVELS ROOM FORTHERIVER,NETHERLANDS D C B

levels, theworkwillbecompletedinlate2015. component ofthisproject.Dependingontheweatherconditionsandwater As ontheLowerRhineproject,soundlocationmanagementisacrucial pontoons. bywaterusingpushboats,hopperbargesand transport transported execute theexcavationwork.Incomingandoutgoingequipmentwillbe machinesto the constructionofdams.Therewillbedozensearthmoving techniques.Sixfloatingpontoonswith craneswillbedeployedon surveying be conductedbelowthewaterline,thesechecksareusing oftheprojectwill and willremain,sand-proof.Giventhefactthatalargepart began inmid-2013.Proofisrequiredthatthegroinanddamstructuresare, toandfromthe project.Operations being limitedbyusingshipsfortransport infrastructure ortheinterestsoflocalresidents.Theimpactforresidentsis environment, unexplodedordinance,leisurefacilities,underground objection proceedingsinareassuchasarchaeology, ecology, the assessment ofwhethertherewerepossibledifficultiesthatcouldleadto wasconductedforeachgrointhatincludedan 2013. Arisksurvey applicationsbeganinthefirstsixmonthsof The preparationsandpermit methods. elaboratingthetechnicaldesign,anddevelopingworking services, ofitsownengineeringconsultancyandothersupport contributing theexpertise UAV-GC contractthatBoskalisisexecutingwithVan denHerik.Boskalisis a firstintheNetherlands:thisispilotprojectforRijkswaterstaatunder being removedatthelocationsofthesedams.Theconstructiondamsis of theriverinsectionbetweenWamel withthegroinsare andOphemert, Two damsmeasuringsevenandfourkilometersarebeingbuiltinthedirection high water, thewaterlevelwillbebetween6and12centimeterslower. have beenlowered,improvingtheflowofriverwater. Duringperiodsof have beenlowered,extended,removedandupgraded.Atotalof253groins D Work ontheLowerRhine project removed andupgraded. Dodewaard ,365groins havebeenlowered,extended, Lowering thegroinsin theWaal. Between Dalemand pass moreeasily. parallel totheflowofwatermeansthat therivercan Tiel toreplace groins.Theirpositioning andOphemert Dams arebeingbuiltinthedirectionof riverbetween www.boskalis.com [email protected] F +317869555 T +317869000 The Netherlands 3350 AAPapendrecht PO Box43 Royal BoskalisWestminster N.V.