Boskalis Nordic Today No.02/2018-2019

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BOSKALIS AREA NORDIC | INFORMATION MAGAZINE NO. 02 / 2018—2019

INTERNATIONAL DREDGING AND MARINE EXPERTS

IN THIS ISSUE

COVER PHOTO MUSSALO HARBOUR, EXPANSION OF D TERMINAL PHOTO: TERRAMARE OY

MANAGING DIRECTOR’S COLUMN STRENGTH IN THE TEAM GAME

MUSSALO HARBOUR EXPANSION NEW D HARBOUR SECTION FOR UPM PULP TERMINAL

CUSTOMER’S NEWS KIMMO NASKI, CEO OF PORT OF HAMINAKOTKA

EXPANSION OF PORT OF KALAJOKI MORE BERTHS FOR CONTAINER TRAFFIC

EXPANSION OF PORT OF RAAHE EXPANSION FOR LOW-EMISSION LNG VESSELS

PERSONNEL NEWS DREDGE MASTER MIKKO MERTANIEMI

REFURBISHMENT OF TURKU MAIN CHANNEL MAINTENANCE DREDGING AND REPLACEMENT OF ICE BUOYS WITH SPINDLE BUOYS

NEWS BOSKALIS ON THE MOVE SEMINAR

BOSKALIS AREA NORDIC Boskalis Area Nordic has strong experience and special know-how in harbour and marine construction. Specialisation in different types of services, such as underwater drilling and blasting, port construction and various dredging methods in different soil types, has made us one of the leading contrac- tors in the Nordic countries.

WORK SITES TODAY | WINTER 2018–2019

PROJECT NEWS HERNESAARI CRUISE SHIP (LHD) QUAY READY

BACK COVER WORKING UNDER THE NORTHERN LIGHTS GRAPHIC: MARKKU SALONEN

The Boskalis Area Nordic companies mentioned below provide all the services in their region.

TERRAMARE OY | FINLAND BOSKALIS SWEDEN AB | SWEDEN ROCK FALL COMPANY LTD | UNITED KINGDOM TERRAMARE EESTI OÜ | ESTONIA

BOSKALIS NORDIC TODAY

OUR COMMON WEBSITE: BOSKALIS.COM/NORDIC

INFORMATION MAGAZINE NO. 02 / 2018–2019

EDITOR–IN–CHIEF Nina Kesseli P. +358 9 6136 2618 F. +358 9 6136 2701 nina.kesseli@boskalis.com

EDITING & LAYOUT Markku Salonen

Our parent company is the globally operating Royal Boskalis Westminster N.V. The listed company operates in 90 countries on six different continents.

NORDIC ECOLABEL 4041 0750 Ecolabelled Printing Paper

MANAGING DIRECTOR’S COLUMN

STRENGTH IN THE TEAM GAME

we can commit more closely to a team game similar to that in Sweden, supporting and encouraging each other.

ATTENTION TO OCCUPATIONAL SAFETY Terramare had a record year in 2018. We have had interesting projects in Finland, Sweden and a little further afield, such as in Uruguay and India. When the amount of work is growing quickly, managing and directing projects require additional attention on our part. In terms of occupational safety, we have not developed as we would have wished and we have not, unfortunately, managed to avoid acci- dents and serious near miss situations. Some near miss situations and accidents could have been avoid- ed through better advance planning. Serious accidents in projects have included the spinning of a tubular pile on to a worker’s legs, an excavating machine falling into the sea and a dumper suddenly catching fire. The content of this column would have been darker in tone, even desolate, if matters had taken a more unfortunate turn in the situa- tions mentioned above. For many years we have adopted the theme that: “Work must be done safely or not at all.” Now, we have had more luck at times in what we do than skill in working safely. In previous years, we in Terramare have been pathfinders in the infrastructure sector in occupational safety, and I know that we will also continue to lead the way on this crucial issue in the future. Now, we only have to roll up our sleeves once again and work together, particularly with respect to the advance planning of work. The team and each individual person must be able to ask themselves openly and honestly whether we have really done eve- rything we can to ensure that work is carried out safely. We will surely put things right when we address the safety issue resolutely and think clearly about what we do. A little occupa- tional safety training and revision will be no bad thing for us. We will determinedly invest in this, both now and in the future.

2018 was a busy year in the marine construction sector, and the outlook for 2019 in Finland and Sweden is reasonably good, boosted by a number of key projects. In Finland, the civil and marine engineering market is expected to contract by 2-4 per cent this year as housing construction slows down. In sporting terms, it has been customary in Finland to push construction to the limits and to see how long it continues before it hits the wall. In Sweden, they are known to play the game in a different kind of way, particularly in team sports. In Sweden, in accordance with the team game spirit, a joint 12- year long-term national plan has been prepared for the construc- tion and modernisation of railways, highways and waterways. The state has allocated to projects SEK 700 billion (nearly EUR 70 bil- lion) up to 2029. Decisions have been prepared carefully with op- erators in the sector, and all of the political parties have committed to the investment decisions, irrespective of who has government responsibility at any given time. The Luleå and Gothenburg port and shipping channel projects are among the waterway projects included in budgeting. In Finland, too, a good, open and wide-ranging market dialogue is already under way between major customers, service providers and planners, of which the round-table meetings of the Finnish Transport Agency and Infra Ry are examples. These are really rewarding events for developing the sector, markets, forms of pro- curement and a joint team game. It is to be hoped that in Finland

I WISH A GOOD START TO 2019!

Hannu Tomperi MANAGING DIRECTOR | TERRAMARE OY

The Boskalis WAY OF WORKING quality management system aims to achieve operational excellence with a clear focus on safe and sustainable solutions and a consistent client approach. More than just systems and procedures, the Boskalis Way of Working provides a consistent approach towards the initiation, planning, execu- tion and completion of our projects. At the same time it promotes diversity in our teams with experts, facilitates innovation whilst caring for people and the environment with a commitment to act with respect and integrity. This is how we create new horizons for all our stakeholders.

04 PORT OF HAMINAKOTKA, FINLAND | MUSSALO HARBOUR, EXPANSION OF D TERMINAL NEW HARBOUR SECTION IN MUSSALO FOR UPM PULP TERMINAL

TEXT & PHOTOS: MARKKU SALONEN | PHOTO 03: PORT OF HAMINAKOTKA | PHOTOS 04−06: TERRAMARE

F innish forest industry company UPM has decided to centralise the sea transport of its Kaukas and Kymi pulp mills, located in Southeast Finland, at Mussalo Harbour in Kotka, where a ma- jor UPM pulp terminal will be built. Port of HaminaKotka is investing in a significant expansion of the D section of the harbour for the pulp terminal’s shipping activity. The expansion consists of the construc-

tion of a 220 metres long quay berth, a harbour basin area of around 20 hectares and a 620 metres long breakwater. The expansion comprises, in fact, a completely new harbour section, which will be able to serve the largest cargo vessels of the Baltic Sea. When the harbour section is complet- ed this year, Mussalo Harbour will become the Baltic Sea’s most important pulp port. In the major project, the UPM pulp termi-

nal and the harbour section will be imple- mented in parallel. The logistics company Steveco is responsible for implementing a 20,000 square metre terminal hall and a five hectare terminal field covering around five hectares, which be built in connec- tion with the new harbour section. In the contract, Terramare is responsible for con- structing the new D harbour section. HARBOUR BASIN DEEPENING Terramare began the expansion work of Mussalo Harbour’s D section in favourable weather conditions in summer 2018. The contact was launched with the deepening of the extensive harbour basin area, which also required, in addition to dredging, un- derwater drilling and blasting due to the rocky sea bottom. A total of 240,000 m 3 of bedrock was removed from the site. Of the large amount of rock waste, much will be utilised in the breakwater to be built. Underwater drilling and blasting was

BOSKALIS AREA NORDIC´S OPERATING PRINCIPLES ARE: WE DO WHAT WE PROMISE — RIGHT FIRST TIME — WORKING TOGETHER

Terramare is responsible for the construction of an expansion of the D section of Mussalo Harbour, in Kotka, Finland, for the use of a UPM pulp terminal. The contract consists of a 220 metres long retaining quay wall, a 620 metres long breakwater and a deepening of an extensive harbour basin to a minimum depth of −17.5 metres.

carried on schedule during the autumn. Dredging of the site is continuing, and it is estimated that the dredged material will amount in total to around 500,000 m 3 . The harbour basin will be deepened to a minimum depth of −17.5 metres. Terramare Site Manager Reijo Kulta- lahti is very satisfied with the implementa- tion of the varied project. “The D-section expansion is also a sig- nificant project for Terramare in terms of its size. It gives us the opportunity to utilise all of the areas of Terramare’s core expertise, such as dredging, underwater dredging and blasting, seaward rock filling, slipform casting and quay construction,” says Kulta- lahti. “The scope of the project, the dredging depth and the rocky, hard sea bottom have also required powerful equipment, for which Terramare’s largest drill barge Playmate and the parent company’s huge backhoe dredger Nordic Giant, transport-

MASSIVE DREDGING AND HARD BEDROCK REQUIRE high-performance equipment. Terramare personnel monitor the work of the powerful backhoe dredger Nordic Giant. THE HEAVY-DUTY BACKHOE DREDGER NORDIC GIANT was transported to the Mussalo site from Dover, England. Pictured alongside the dredger is the 60-metre barge Terra 1. ARTIST’S IMPRESSION OF THE EXPANDING HARBOUR AREA, to be used for UPM’s new pulp terminal. A) Pulp terminal and field, B) 220-metre quay, C) 620-metre breakwater. IN THE EXPANSION OF THE D-SECTION HARBOUR BASIN, a total of 240,000 m 3 of rock was recovered during underwater drilling and blasting, which was carried out by the drill barge Playmate, pictured in the foreground.

INTERNATIONAL MARINE EXPERTS | BOSKALIS AREA NORDIC | WWW.BOSKALIS.COM/NORDIC

ed to the location from a site in Dover, Eng- land, are highly suitable. The self-propelled barges Terra 1 and Terra 2, both of which have a load capacity of 660 m 3 , are also well suited to a project of this magnitude,” adds Kultalahti. 620-METRE BREAKWATER A breakwater protecting the D section on the west side of the area will also be implemented alongside the deepening of the harbour basin. The 620 metres long breakwater will be nearly 4 metres high above sea level. “This is one of the biggest breakwaters that I have worked on during my career. It will be built using of vast quantity of rock,

some of which is rock waste obtained from the underwater dredging and blasting,” continues Kultalahti. MASSIVE QUAY ELEMENTS Slipform casting for the 220 metres long quay berth to be constructed was also launched in parallel with the harbour area expansion work. A slipform casting site was established on the broad end em- bankment of the Mussalo Harbour’s A and B quay areas. “We began work on the slipform casting site in July by reinforcing the shore em- bankment, because the 53 quay elements implemented for this project are exception- ally massive. The slipform cast elements

are nearly 19 metres high, which is around six metres more than usual in this type of project ,” explains Matti Juslenius , man- ager of the slipform casting site. Early-stage slipform casting work in- cluded, among other things, reinforcement work, casting of base slabs and construc- tion of casting moulds. A total of one mil- lion kilos of reinforcement steel was used in the reinforcement work. “And, yes, there were quite a few aston- ished onlookers as the slipform casting progressed, because this impressive, near- ly 20 metres high, 300 metres long row of 300-tonne retaining wall elements and 140-tonne intermediate elements certainly attracted attention. An often asked ques-

MASSIVE, NEARLY 19 METRES HIGH QUAY ELEMENTS, produced by slipform casting, will be installed in the quay line in spring 2019. A total of 53 elements were constructed. SLIPFORM CASTING WAS PRECEDED BY CASTING of base slabs and reinforcement work. The picture shows the lifting and installation of the reinforcements. A total of approximately one million kilos of reinforcement steel was used in the reinforcement work.

BOSKALIS AREA NORDIC´S OPERATING PRINCIPLES ARE: WE DO WHAT WE PROMISE — RIGHT FIRST TIME — WORKING TOGETHER

CUSTOMER’S NEWS | KIMMO NASKI, PORT OF HAMINAKOTKA’S CEO:

’

STRONG, NEW GROWTH IN ALL ASPECTS OF PORT ACTIVITY’

WWW.HAMINAKOTKA.COM

portunities for Finnish softwood pulp, for example as a raw material substituting for plastics, might make this product a ‘new Nokia’ for us,” emphasises Naski. “The decision to locate the pulp terminal at our Mussalo Harbour is based on effi- cient infrastructure, excellent rail links and versatile shipping options, and of course the opportunity to build at our harbour a large terminal area where pulp is handled easily and smoothly. In addition, our deep fairway provides operating opportunities for the largest cargo vessels in the Baltic Sea,” explains Naski. “From the perspective of our port’s growth in pulp traffic, it is also significant that we have signed a letter of intent with Finnpulp on the transport through HaminaKotka of the export logistics of the world’s largest softwood pulp mill, being planned for Kuo- pio. And new growth is also emerging with UPM’s plan to build a biorefinery at our port,” adds Naski. “In addition to the major projects and plans mentioned above, we are involved in two other large world-class projects. One of these is the Belgian Sarens Group’s reshipping, via the Port of Hamina, of giant modules to the oil fields of Kazakhs- tan. Overall, the Sarens Group’s project is currently the largest project under way in the world. The second large project is the Nord Stream II gas pipeline project, in which Port of Hamina is acting a key har- bour,” continues Naski. “In other words, we can state, in summa- ry, that Port of HaminaKotka is on a real growth track, although we are fully aware of the need to keep our feet firmly on the ground. I believe, however, in the sustai- nability of the Finnish forest industry’s pro- duct exports and in the profitability of new forms of activity and services in the long term. We are also pleased to have recei- ved EU support for the pulp terminal port expansion. It is a significant contribution and covers around one fifth of the total in- vestment,” says Naski in conclusion.

tion is how we will manage to transfer such apartment block size elements for installa- tion in the quay line. People are amazed when we tell them that the elements will be lifted and transported to the installation site by a floating crane,” says Juslenius, de- scribing the attention his slipform casting site has received.” All of the quay elements were completed by the end of November last year. Now they will wait in a row on the embankment for the astonishment of passers-by until the spring, when they will be lifted one by one and transported for installation in the D- section quay line, on the deepened and levelled sea bottom. “Of these huge elements, only 60 centi- metres will remain visible above the sea in the quay line, because during installation they will be sunk to a depth of over 18 me- tres. The visible quay profile will ultimately consist of the coping beam of the retaining quay wall, which will be cast on top of the elements,” says Juslenius. Along with all of the initial stages, the ex- pansion work of the Mussalo Harbour’s D section, ordered by Port of Hamina, will continue in spring 2019 with, among other things, quay line levelling work, installation of the retaining wall elements, completion of the quay with full equipment and acces- sories, and finishing of the breakwater. Terramare Project Manager Jani Vyyryläinen , who has overall respon- sibility for the contract, is monitoring the development of the project confidently. “Whatever the size of the project, I can only say that everything is made possible purely and simply by skilled, cooperative and professional personnel. It is a valuable resource in which we trust when taking for- ward with confidence even a large project like this,” concludes Vyyryläinen. NEW WORK STAGES IN THE SPRING 2019

P ort of HaminaKotka’s CEO, Kimmo Naski D.Sc.(Econ.), has managed the port company in its present form, after the merger of the Ports of Kotka and Hamina, since 2011. This period has been marked by the aftermath of the glo- bal recession and the recovery from it. For Port of HaminaKotka, however, recovery has meant a strong growth track through which the company has risen to become the fourth largest container port on the Bal- tic Sea. “A strong upswing happened in 2016 when our port’s transport volumes started to grow substantially, but alongside this many significant things have also hap- pened, in fact in all aspects of port activi- ty,” says Naski with satisfaction. “The most recent of these is the agree- ment reached with UPM and Steveco on the investment in a large pulp terminal at our Mussalo Harbour in Kotka. The outlook for pulp exports is excellent, and I believe that our investment in the port expansion connected with the pulp terminal will be rewarding in long term. The world market price, demand and further processing op-

INTERNATIONAL MARINE EXPERTS | BOSKALIS AREA NORDIC | WWW.BOSKALIS.COM/NORDIC

08 PORT OF KALAJOKI, FINLAND | WEST QUAY EXTENSION AND NEW RO-RO RAMP

PORT OF KALAJOKI LAUNCHES CONTAINER TRAFFIC

TEXT: MARKKU SALONEN | PHOTOS 01 AND 03: TERRAMARE, PHOTO 02: PORT OF KALAJOKI

T he town of Kalajoki, renowned for Finland’s finest sand dunes, is also well known for its sawn timber port, the largest on the Gulf of Bothnia. Ap- proximately 500,000 m 3 of sawn timber is exported through the Port of Kalajoki each year, mainly to the rest of Europe and North Africa. The total annual traffic vol- ume is around 700,000 tonnes, and ap- proximately 200 vessels, on average, visit the port each year. In addition to sawn timber, plywood, steel structures, scrap iron, growth peat, grain and wood pellets are also exported from Kalajoki. Imports include various minerals and animal feed for industrial use as well as project cargo, such as wind turbine parts. The traffic at the port has been growing steadily, and new growth is also being promoted by container traffic, launched in summer 2018, which will significantly ex- pand the port’s services.

123-METRE QUAY EXTENSION In the expansion of its operations, the Port of Kalajoki will increase its ship berths with a new quay section, extending the length of its West Quay by 123 metres. The quay extension also comprises a 19 metres long transverse quay, including a ro-ro ramp, to be built at the outer end of the extended quay. The quay extension will enable the port to handle two handysize cargo ves-

sels simultaneously or provide a free berth for line and container traffic. Terramare is responsible for the Port of Kalajoki’s West Quay extension and ramps. The contract began at the begin- ning of 2018 with dredging and levelling work carried out at the quay extension site. Underwater drilling and blasting were also carried out at the outer end of the quay. The site was dredged to a mini-

THE CAST-IN-SITU ELEMENTS FOR THE WEST QUAY extension were installed at the site using the floating crane Nosto-Pekka. THE PORT OF KALAJOKI IS LOCATED IN A PLACE of great natural beauty, close to sand dunes popular with holidaymakers.

10.2 METRES HIGH QUAY ELEMENTS, 29 IN TOTAL, were produced with in-situ casting.

BOSKALIS AREA NORDIC´S OPERATING PRINCIPLES ARE: WE DO WHAT WE PROMISE — RIGHT FIRST TIME — WORKING TOGETHER

The Port of Kalajoki, located in Finland on the Gulf of Bothnia coast, is increasing its ship berths with a new quay section, extending the length of its West Quay by 123 metres including a 19 metres long quay with a ro-ro ramp.

After completion of the quay work, the Port of Kalajoki will have a total of 550 metres of quay for loading use. The Port of Kalajoki’s quay investment has also stimu- lated other development activity. Both of the port’s operators, Rahjan Huolinta Oy and Oy Blomberg Stevedoring Ab, have invested in new harbour crane equipment. The launch of container traffic has also required investments in a new warehouse building and container fields.

stage where we have installed, with the as- sistance of divers, the erosion slabs on the sea bottom in front of the quay. Alongside the backfilling of the retaining quay wall elements, we have also begun the casting of the quay coping beam,” explains Sep- pälä. “The work will continue over the winter and, after completing the edge beam, we will implement the quay’s public utility services, surfacing work, asphalting and quay accessories,” adds Seppälä.

mum depth of −9.5 metres, and the dredg- ing masses amounted to around 73,000 m 3 . The dredging was implemented by the backhoe dredger Attila and the underwa- ter drilling and blasting by the drill barge Rockbuster. Alongside the dredging, in-situ casting of the quay extension’s retaining quay wall elements was also launched. In this process, 10.2 metres high quay elements, 29 in total, were produced, including re- taining quay wall and intermediate ele- ments. Installation of the elements on the levelled sea bottom of the quay line was implemented by Terramare’s floating crane Nosto-Pekka and its crew. For the contract’s project manager, Juha Seppälä , the advance of the project has been a positive experience. “The Port of Kalajoki quay contract has progressed in a spirit of effective coopera- tion and interaction. We are now at the

INTERNATIONAL MARINE EXPERTS | BOSKALIS AREA NORDIC | WWW.BOSKALIS.COM/NORDIC

| DEEP-WATER HARBOUR EXPANSION, END QUAY AND RO-RO RAMP

PORT OF RAAHE EXPANSION FOR LOW-EMISSION LNG VESSELS

TEXT & PHOTO 01: MARKKU SALONEN | PHOTO 02: TERRAMARE

T he Port of Raahe, located on Fin- land’s northwest coast, has expand- ed its deep-water harbour basin for LNG-powered bulk cargo vessels. Such vessels are powered by liquefied natural gas (LNG), and their emissions are in many respects more environmentally friendly than those that use heavy fuel oil. LNG can help reduce carbon dioxide, sulphur and nitrogen emissions. A bunkering station has also been built at the Port of Raahe for the refuelling of the ships.

BOTHNIA BULK PROJECT The LNG vessels operating at the Port of Raahe belong to a new fleet of vessels which, compared with their predecessors, produce nearly half of the carbon diox- ide emissions arising from raw material transports between the ports of Luleå, Ox- elösund and Raahe. The fleet modernisa- tion is part of the EU co-funded Bothnia Bulk project, in which Port of Raahe Ltd is participating. The project’s other par- ties are the ports of Luleå and Oxelösund,

SSAB Europe Oy, ESL Shipping Oy and Raahen Voima Oy. The aim of the project is to develop an energy-saving, low-emis- sion cargo fleet for the Baltic Sea region. MAJOR EXPANSION CONTRACT In the summer, commissioned by Port of Raahe Ltd and the Town of Raahe, Ter- ramare implemented major expansion deepening of the deep-water harbour in connection with the Bothnia Bulk project. The 25,000 m 3 expansion deepening of

THE HIGH-PERFORMANCE BACKHOE DREDGER Attila carried out the harbour basin expansion effectively. In the background, reinforcement work is under way at the slipform casting site. IN ADDITION TO THE EXPANSION CONTRACT, a new 85 metres long end quay was implemented, includ- ing a 39 metres wide ro-ro stern door ramp to diversify the activities of the deep-water harbour’s main quay.

BOSKALIS AREA NORDIC´S OPERATING PRINCIPLES ARE: WE DO WHAT WE PROMISE — RIGHT FIRST TIME — WORKING TOGETHER

11 PERSONNEL NEWS | TERRAMARE´S DREDGE MASTER MIKKO MERTANIEMI

the harbour basin was implemented to a minimum depth of -11.365 metres. Along- side the expansion dredging, Terramare also implemented a 32,000 m 3 excava- tion for the slope of a new end quay and ramp, which are included in a second con- tract, bringing the total amount of dredg- ing masses to 56,000 m 3 . The dredging masses were dumped into a separate ba- sin, from which they will later be utilised in a one and a half hectare harbour field to be built at the Port of Raahe’s Lapaluoto Harbour. The work was carried out using Terramare’s high performance backhoe dredger Attila. The dredging masses were transported to the dumping basin with the barges SCG 3 and SCG 4, both of which have a load capacity of 500 m 3 . In addition to the expansion dredging, a new 85 metres long end quay was im- plemented at the deep-water harbour in a separate contract. The new quay includes a 39 metres wide ro-ro stern door ramp to diversify the activities of the deep-water harbour’s main quay. In summer 2018, in parallel with the dredging and levelling work in front of the quay, slipform casting of the quay elements began, leading to the production of a total of 17 retaining quay wall elements, each 12.5 metres high. The elements were lifted and installed into posi- tion with Terramare’s floating crane Nosto- Pekka. The tops of the elements installed in the quay line are anchored to the harbour field. On completion the quay will be deliv- ered to the client fully equipped. The new quay section, equipped with a ramp, will also serve, in addition to loading activities, as an auxiliary quay for tugs operating in the basin.

TEXT & PHOTO: MARKKU SALONEN

PRECISION AND ALERTNESS THE KEY ISSUES ON A DREDGING VESSEL

T he backhoe dredger Attila, which has been busy in summer and au- tumn 2018 in Raahe, Kalajoki and Turku, is a familiar work vessel for Dredge Master Mikko Mertaniemi . “Although I’ve worked on many dredg- ers, I could say that the Attila is my home vessel. Over the years, I’ve come to know its character and technology like the back of my hand. It’s a suitable and effective unit for a wide variety of projects,” says Mikko. Mikko has worked in the marine construc- tion industry for over 20 years, and in that time mostly for Terramare. “I’ve always been fascinated and moti- vated by technology, and when I got to know about marine construction, I was attracted not only by its machinery and equipment, but also by its special charac- ter and challenges,” explains Mikko. “In addition, the varied projects in Fin- land and abroad, as well as periodic work, also seem to suit me well. Periodic work means that you work on average for 2-3 weeks and then have the same time off. With that schedule, both at work and on leave, you have enough time to achieve something,” says Mikko with a smile. With a dredging vessel, the dominant element is water and the challenges it

presents. The conditions are in many re- spects different from construction on land. “Working on water is a world of its own in terms of weather and conditions. Moni- toring the wind as well as fluctuations in sea level and temperature is an essential part of the daily routine. On a dredging vessel, the key issues for safe and effec- tive work are precision and alertness, and a readiness to act immediately as the situation demands. You have to constantly know where you are and what is happen- ing. Of course, information technology helps out with this. As a dredger operator you can’t see directly what’s happening when dredging under water, or sometimes even what’s going on around you. So the control cabin’s monitoring systems, loca- tion devices and virtual displays help the work go smoothly, and other screens show the surrounding water traffic,” says Mikko, who up to 2009 also worked as an opera- tor on a dredger. “Thus, over the years, I’ve learned in par- ticular to value working with reliable top professionals. A good team spirit creates a motivating atmosphere in which it’s great to embark on new projects – with enthusi- asm,” concludes Mikko.

The first LNG-powered vessel, M/S Haaga, arrived at Raahe’s deep-water harbour in October 2018. The vessel is a 160 metres long, 26 metre wide ice-strengthened ship, with a draught of 10 metres. The second LNG vessel to be served at the harbour is the M/S Haaga’s sister ship M/S Viikki.

INTERNATIONAL MARINE EXPERTS | BOSKALIS AREA NORDIC | WWW.BOSKALIS.COM/NORDIC

12 PORT OF TURKU, FINLAND | MAINTENANCE DREDGING OF MAIN CHANNEL AND REPLACEMENT OF SEA MARKS TURKU MAIN CHANNEL CLEARED OF RIVER AURA SEDIMENT

TEXT : MARKKU SALONEN | PHOTO 01: MARKKU ALAHÄME, PORT OF TURKU

T he busy main channel of the Port of Turku, located in southwest Finland on the coast of the Archipelago Sea, needs regular maintenance due to the River Aura that runs through the city. The Rajakari–Turku channel and Turku’s main harbour are located at the mouth of the River Aura, which carries sediment into the area. The sedimentation in the harbour area and channel requires maintenance dredging at regular intervals. This ensures that the channel and the harbour basin maintain their officially stated navigation depth and safety. Terramare began maintenance dredging at the site in autumn 2018. The contract included 13 different dredgings in the ar- eas of the main channel and the harbour basin, with the minimum depth varying between −11.00 and −8.10 metres. The dredging work covered an area of ap- proximately 120,000 m 2 . The contract also included the replacement of the channel’s

sea marks, with the old ice buoys being replaced by spindle buoys.

Terramare’s backhoe dredger Attila in con- junction with the towable barges SCG 3 and SCG 4. Each vessel has a load capac- ity of 500 m 3 . Terramare’s Site Manager Markku Pöyhönen supervised the project’s progress. “The dredging of the Turku harbour basin and channels involved delicate clearance

DREDGING WITH A LIP BUCKET In the Turku maintenance dredging, an average 20 centimetre layer of sediment deposited by the River Aura was removed from the bottom of the harbour basin and channel. The dredging was carried out by

MAINTENANCE DREDGING OF THE PORT OF TURKU and the main channel was carried out using the backhoe dredger Attila. Pictured alongside it is the towable barge SCG 4. THE SEA MARKS OF THE TURKU MAIN CHANNEL were replaced. The old steel ice buoys were replaced with plastic spindle buoys.

THE VIKING LINE AND SILJA LINE CAR FERRIES OPERATE in the Turku channel through the Archipelago Sea.

BOSKALIS AREA NORDIC´S OPERATING PRINCIPLES ARE: WE DO WHAT WE PROMISE — RIGHT FIRST TIME — WORKING TOGETHER

The flow of the River Aura carries into Turku’s harbour and main channel sediment that has to be removed at regular intervals. This ensures that the channel and the harbour basin maintain their officially stated navigation depth and safety. Terramare was responsible for the maintenance dredging in 2018.

dredging in which we used a lip plate fixed on top of the claws of the dredger’s buck- et. The channels’ dredging masses were mainly loose clay which, during dredging, was also studied for future stabilisation measures planned in future maintenance dredging,” explains Pöyhönen. “The Turku maintenance dredging went smoothly. During the work, we ensured at the same time that the Viking Line and Silja Line car ferries were able to operate un- hindered in the Port of Turku despite our dredging activities,” continues Pöyhönen. ICE BUOYS TO SPINDLE BUOYS Terramare’s contract also included the re- placement of sea marks in Turku’s main channel. This involved changing the old ice buoys with new spindle buoys. “We have replaced the old steel ice bu- oys with new plastic spindle buoys, which need less maintenance that ice buoys. The old steel ice buoys also needed regular maintenance painting, while the surface layer of the plastic spindle buoys is dyed throughout,” says Pöyhönen. “Replacement of the sea marks was im- plemented in cooperation with a subcon- tractor, Meritaito Oy. We lifted the old ice buoys out with a backhoe dredger and levelled the bottom, while Meritaito in- stalled the new spindle buoys precisely in position with its own channel maintenance vessel Seili. A total of 21 sea marks were replaced in the contract,” says Pöyhönen in conclusion. The Turku maintenance dredging and the installation of the new sea marks have now been completed. The River Aura will ensure, however, that the maintenance dredging is repeated every few years.

ICE BUOY STEEL

SPINDLE BUOY PLASTIC

10 m

WEIGHT 10,000 KG

GRAPHIC: MARKKU SALONEN PHOTO 03: JOUNI SAARISTO, PORT OF TURKU

WWW.PORTOFTURKU.FI

INTERNATIONAL MARINE EXPERTS | BOSKALIS AREA NORDIC | WWW.BOSKALIS.COM/NORDIC

NEWS

BOSKALIS ON THE MOVE BRAZILIAN SEMINAR | 15 AUGUST 2018 AT THE SEMINAR: TERRAMARE & ROCKFALL – INTERNATIONAL UNDERWATER DRILLING AND BLASTING

O n 15 August 2018, Boskalis held a seminar in Itajaí, Brazil. The seminar was part of the Boskalis On The Move marketing project, in which the company is pre- senting its international marine construction expertise at various locations around the world. For Terramare, the Brazilian seminar was also a major event, as the company had the opportunity to present, in cooperation with the British company Rockfall, the in- ternational underwater drilling and blasting services it has to offer. Terramare was represented at the event by Project Manager Sami Soikkeli . “It was great, of course, to also be able to present underwater drilling and blasting services, benefits and related issues in Brazil, where as well as ports and channels there is also an emphasis on shoreline maintenance, particular due to erosion. In Brazil, mainte- nance of shoreline areas is a continuous process,” says Sami. “At the same time, we became acquainted with local needs, practices and legislation in marine construction. The event also

enabled us to present underwater drilling and blasting solutions for environmental construction. We have experience, for example, of constructing breakwaters and artificial reefs implemented with rock waste and of encapsulating contaminated dredging masses. Utilising rock waste obtained from underwater drilling and blast- ing in various projects aroused a lot of interest,” explains Sami.

INTERNATIONAL REPRESENTATIVES AT THE Boskalis seminar held in Itajaí, Brazil. Terramare Project Manager Sami Soikkeli is third from the left. AT THE EVENT, PARTICIPANTS WERE INTRODUCED to underwater drilling and blasting methods and uses. Pictured is a presentation on safe liquid explosives developed by Terramare.

Check out and follow the Boskalis On The Move project at: WWW.BOSKALISONTHEMOVE.COM

BOSKALIS AREA NORDIC´S OPERATING PRINCIPLES ARE: WE DO WHAT WE PROMISE — RIGHT FIRST TIME — WORKING TOGETHER

BOSKALIS AREA NORDIC´S WORK SITES TODAY | WINTER 2018—2019

WORK SITE

PROJECT MANAGER

SITE MANAGER

Marieholm tunnel project, Gothenburg, SWEDEN

Juhani Naukkarinen Markku Sollo Markku Sollo Tristan Forsythe Markku Pöyhönen Matti Juslenius Arto Kontio

Jouko Sederholm Juha Seppälä Juha Seppälä Colin Fergusson Marko Saarelma Jani Vyyryläinen Marko Saarelma / Bart de Witt

Port of Raahe, expansion of deep-water harbour, quay work, FINLAND

Port of Kalajoki, extension of West Quay, FINLAND

Seabird phase IIA, underwater drilling and blasting, Karwar, INDIA

Port of Turku, maintenance dredging of main entry channel, FINLAND

Port of HaminaKotka, expansion of Mussalo Harbour’s D section, FINLAND

Stockholm Norvik Port project, quay work, SWEDEN

SAFETY, QUALITY AND ENVIRONMENT

Terramare has a management system certified according to the Quality Standard ISO 9001 and the Environmental Standard ISO 14001. The company’s occupational health and safety fulfils the requirements of OHSAS 18001.

RALA r.y. has granted Terramare a construction company Certificate of Competence for main contracting.

PROJECT NEWS | PORT OF HELSINKI, FINLAND

HERNESAARI CRUISE SHIP (LHD) QUAY READY T erramare has handed over the Hernesaari 313-metre cruise ship quay to Port of Helsinki.

The quay is located in Helsinki’s West Harbour, and it is able to receive luxury cruise ships up to 330 metres in length. The world’s busiest passenger port will take the quay into use for the 2019 cruise season. The quay was handed over fully equipped. The contract also included the adjacent harbour field with pub- lic utility services as well as massive storm bollards.

INTERNATIONAL MARINE EXPERTS | BOSKALIS AREA NORDIC | WWW.BOSKALIS.COM/NORDIC

WISHING YOU A SUCCESSFUL START TO 2019

WORKING UNDER THE NORTHERN LIGHTS | GRAPHIC: MARKKU SALONEN

www.boskalis.com/terramare

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