Journal Eastmain Juin 2010 eng

Volume 8, Issue 2, June 2010

Eastmain-1-A powerhouse water intake

STARTUP AHEAD OF SCHEDULE

FIRST GATE OPERATION AT RUPERT SPILLWAY

Sarcelle powerhouseARCHITECTURAL, MECHANICAL AND CONCRETE WORK ... SOLID AS A ROCK!

People with a powerful vision

The Eastmain-1-A powerhouse water intake

Startup ahead of scheduleCL – The last operations prior to startup of the water intake were successfully carried out, allowing water from the reservoir to � ow back into the con� nes of the temporary dike on Monday, April 26, 2010, a week ahead of schedule.

Several steps were taken during the last weeks of April to reach this goal; for example, removing the wire mesh, dismantling the pumping station and cleaning the rock, carried out by Neilson-EBC. None of this would have been possible without the impres-sive work of CIC in concreting the water intake and penstocks.

Canmec Industriel also successfully completed the installation of the three gates and trashracks, while conducting the necessary tests on the set of stoplogs. “Alignment of the gate slots began on January 15, 2010. It was a race against time, since we had to be ready for startup on May 3,” said Félix McKoy-Perreault, Jobsite Project Manager for Canmec Industriel. “Thanks to the e� orts of the Canmec team, in partner-ship with Construction Euler, Nordex and Génitique, we were able to lock out the gates for startup on Monday, April 26,” he added proudly.

Startup

During startup, � ve to seven pumps were used to move water from the reservoir into the enclosure.

Pumping began on April 26 in the afternoon and ended on the morning of May 4. It took seven-and-a-half days of nonstop pumping to raise the water level in the enclosure to the same level as the reservoir, 275 metres above sea level.

On April 28, water almost completely covered the trashracks.

The 271 sheet piles patiently waiting to be removed.

Removal of the sheet piles and the temporary dike

The next steps consist of removing the sheet-pile cuto� wall and dismantling the temporary dike in the headrace. To this end, Neilson-EBC removed the � rst sheet piles on May 4. Removal of all 271 steel sheet piles is expected to take until the end of May. Then the bucket of the huge Liebherr dragline excavator will be in operation until October 2010 to remove the bulk of the temporary dike and � nish remodelling the ends of the spur dikes.

Supervisor – Public Relations / Magazine Editor: Bionda Miotto / 819 672-2200, ext. 3854 [email protected] Advisor - Public Relations and Editor-in-Chief: Jimmy Lavoie / 819 865-2100 poste 4159, [email protected]: Pascal Dion, Catherine Langlois, Marie-Ève Morin, Liza Perron, Mélanie VachonContributors: Yvon Coulombe , Normand Faubert, Carine Durocher Translator: Margaret Kane Savage / Reviser: Isabel Fonte / Graphics: Paul Salois Design / Photographer: Paul Brindamour / Printer: Imprimerie Lebonfon

Eastmain Magazine is published by SEBJ Public Relations for the workers of the Eastmain-1-A/Sarcelle/Rupert project. Internet site: www.hydroquebec.com/rupert. Extranet site: www.extranetsebj.ca. (© SEBJ, All rights reserved)Eastmain Magazine is printed on chlorine- and acid-free EcoLogo certifi ed paper, made in Québec, containing 100% post-consumer fi bre, manufactured using biogas energy.

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2 Eastmain Magazine, June 2010 People with a powerful vision

CL – The three trashracks, designed and supplied by Canmec Industriel, are among the largest installed on a Hydro-Québec jobsite. A single trashrack con-sists of � ve sections, 16 metres long and 2.7 metres wide. Each section weighs 25,000 kg and has traveled almost 800 kilometres by truck from the Canmec factory in Chicoutimi.

It took � fteen trips to move these huge parts to the Eastmain-1-A jobsite.

The water intake on the eve of startup

JL – Cégerco–Inter-Cité is working on several fronts at the Eastmain-1-A power-house. Outside the superstructure, the contractor mobilized a 300-tonne crane in early May to install the prefabricated beams of the transformer deck. These interlocking slabs will allow quick instal-lation of the deck for the future trans-formers on the front of the powerhouse. Similar prefabricated beams will also used for the generator � oor.

Inside the powerhouse, Inter-Cité is con-tinuing its numerous concrete pours in the generator area. The concrete cover-ing the LC 11 scrollcase was completed in early May and pours for unit LC 12 have begun.

Les travaux au tablier des transformateurs le 13 mai dernier.

Phase II concrete work

Huge sections!

Les travaux au tablier des transformateurs le 13 mai dernier.Les travaux au tablier des transformateurs le 13 mai dernier.

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Eastmain Magazine, June 2010 3

Excavation of the tailraceJL – Work has been in high gear at the tailrace of Eastmain-1-A powerhouse since the beginning of spring. Neilson-EBC is working in overdrive to excavate this important canal through which water will � ow from the powerhouse. More than 525,000 m3 of rock will have to be removed by August.

An equivalent volume of overburden has already been removed in the same area over the last year.

Excavation of the powerhouse tailrace.

Eastmain-1-A powerhouse under construction and Eastmain-1 powerhouse operational.

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Supply and assembly of generating units JL – Now that the preparatory work for the scrollcase of unit LC 11 has been completed, turbine manufacturer Voith Hydro has to repeat the various assembly operations on the scrollcases of units LC 12 and LC 13. Accordingly, after assembly of the spiral sections, the parts will be sol-dered and X-ray inspected and, � nally, the bulkheads will be installed to start � lling in preparation for hydrostatic testing. Only then can concrete be poured around the huge spirals. The turbine manufacturer can start installing the stay rings as soon as the scrollcases have been con-creted.

Equipment and mechanical and electrical systemsThe TAP Consortium is proceeding with its contract to sup-ply and install equipment and electrical and mechanical systems at Eastmain-1-A powerhouse. The work to equip the powerhouse is advancing on every level: lighting, elec-trical and telephone outlets, cable racks and air condition-ing, for example. Electrical work is also progressing in the water intake’s hoist rooms.

Assembly of the three generating units.

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Water intake

LP – Construction of the upstream side of the power-house, initiated at the end of 2009, resumed at a brisk pace when the employees of Nordex, subcontractor for CRT-Hamel, returned to the jobsite. In mid-May, the task for units 21 and 22 was to � nish the concrete surfaces. The intake section of unit 23, less advanced than the others, went up quickly. In fact, in early June, the last lintel was completed.

The lintels are slightly rounded concrete sections. The powerhouse has six of them, two per unit; the three lin-tels at the entrance to the water intake are concave and the other three, closer to the bulb turbines, are convex. The curves in the concrete channel the water, reducing turbulence that could a� ect the generating units.

Di� users

Construction of the di� users is progressing. The three di� users will be the last parts of the powerhouse the water will touch on its way out. They are cast to create a funnel e� ect, thereby increasing drainage capacity. This con� guration results in a di� erence in diameter of approximately 6 metres from the inlet of the draft tube cones to the outlet of the di� users.

Contrary to the order followed during installation of the draft tube cone armoring, upstream of the di� users, the excavation, reinforcement, formwork and concreting started with units 21 and 23, adjacent to the rock. The central unit was left free to move material in or out from inside the powerhouse. This was the only place where the bracing (diagonal steel bars) was removed.

Rebar, concrete, formsConcrete work all year round

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Architectural, mechanical and electrical workMV – Finishing work in the various rooms of the service area is moving ahead quickly. In the assembly area, the � bre cement coating has been applied. This type of factory-made coating, composed of Portland cement, sand and cellulose � bres, makes it possible to obtain a � re resistance rating for type A � res. Products of this kind require less maintenance and are resistant to insects and mold.

More and more electrical conduits, ductwork, plumb-ing and wiring racks have appeared along the walls and ceilings of the various � oors of the service area. The employees of contractor CLS have been hard at work in this part of the powerhouse since February. Working together, electricians, pipe� tters, welders and other trades people have kept up with the rapidly advanc-ing architectural work: masonry, drywall installation, plastering, painting, � reproo� ng, door installation and much more. Some rooms, such as the assembly area, were scheduled for delivery in early May, when workers of contractor Alstom moved into this part of the service area en masse to begin assembly of the � rst stay ring.

Architectural work was also underway outside. Roo� ng of the powerhouse and railing installation by CRT-Hamel ended in early May.

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Overhead travelling crane

LP – The overhead traveling crane, with a capacity of 210 tonnes, the auxiliary crane, which can lift 25 tonnes, and the mono rail, with a hoist capable of lifting 10 tonnes, were tested at 100% and 125% of their capacities on April 27.

The crane o² cially took its position above the location of the future generating units on May 17.

Superstructure

LP – The steel superstructure went up within deadline. In early May, workers of Alma Soudure installed the prefabricated concrete panels forming the upstream wall of the powerhouse. There were nine bays to close using these huge concrete structures manufactured by � rm Tremca in Saint-Jean-sur-Richelieu.

Eight sections of the same size were walled o� by seven panels weighing 15,000 pounds apiece; the much larger bay adjacent to the service area required thirteen 17,000-pound panels.

Powerhouse switchyard

MV – Hydro-Québec is supervising the begin-ning of work at the powerhouse switchyard. The excavation of three areas that will hold the three oil recovery basins, the oil recovery separator and several equipment bases for anchoring the towers and transformers has been underway since April. Rebar is also being installed to anchor switchyard components.

Section 16

LP – The foundations of section 16 of the powerhouse are taking shape. This last area to be concreted is lo-cated on the left bank, on the same side as the Sarcelle control structure. The � rst pour was on May 6. The 100-m3 concrete base will support the last section of the superstructure. In fact, although the building looks completed, contractor Alma Soudure will be back to � n-ish setting up the steel framework this summer.

Switchyard back� ll retaining wall

The retaining wall at the entrance to the switchyard, which extends to the gantry crane’s storage area, has been completed since May 31. The 45-m3 concrete wall required only three pours.

Busbar assembly

At the entrance to the switchyard, on the powerhouse wall, concrete work on the busbar assembly is � nished. The power produced by the generating units will be transmitted through it to the switchyard’s three trans-formers.

Gantry crane storage area

The concrete for the gantry crane storage area, located near the upstream wall of the service area, was com-pleted in early June.

DID YOU KNOW?Names of the unitsSince the beginning of work at Sarcelle jobsite, we’ve been talking about units 21 to 23.

Maybe you’ve been wondering why? Well, the three powerhouses of the Eastmain-1-A/Sarcelle/Rupert project will be operated from a single location, either Eastmain-1 or Eastmain-1-A powerhouse. The names of the units must therefore eliminate the possibility of confusion for the operator in charge. The rest is just a mathematical series:

Eastmain-1 powerhouse: 1, 2 and 3; Eastmain-1-A powerhouse: 11, 12, and 13; Sarcelle powerhouse: 21, 22, and 23

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MEM – June is here with its lovely days during which wild-life and vegetation remind us of their powerful beauty.

Consequently, the workers have pleasant weather for their ongoing work on the Rupert River. And it’s progressing well; the rock� ll weir at KP 20.4, the spur dikes at KP 49 and 85 and the weir at KP 110 are � nished. Here is the work currently underway on the river:

KP 20.4: The work of dismantling the temporary bridge ended on April 11, which meant the end of Newco’s work on the rock blanket at the weir

KP 33: The left and right abutment walls of the weir should be completed in early July, along with the con-crete work.

In parallel, the excavation and back� ll of the future rock� ll zoned dam in the central channel began in mid-April.

KP 49: Completed

KP 85: Completed

KP 110.3: Completed on April 19 when the entire con-crete weir became operational. Work in this area also included the 550-metre-long secondary dam, the two main dikes, the spawning ground developed downstream and the 3.6 kilometres of access road required for this major work.

Our sincere congratulations go out to contractor Denis Lavoie et Fils for its performance!

More attire for the Rupert River!

KP 110.3

KP 20.4

KP 33

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People with a powerful vision10 Eastmain Magazine, April 2010

KP 170: On April 9, the left branch of the river was cleared to allow the weir to become operational.

Meanwhile, Newco workers closed the right branch, and began in-river concreting of the weir and work on the riverbanks in mid-May.

KP 223: The temporary bridge is � nished and will be in service as soon as the weir is operational.

When the concrete work is � nished (late July), the weir’s upstream and downstream co� erdams will be excavated; the excavation materials will be used as � ll for the future left co� erdam of the rock� ll dam.

KP 290: Work on the central channel weir began in early April and will continue until mid-June. Devel-opment of the � sh pass will continue until the end of June.

KP 170

KP 223

KP 290

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Eastmain Magazine, April 2010 11

MEM – On May 8, 2010, at 10 a.m., the Rupert spillway gates were operated for the � rst time to meet the spring instream � ow commitments.

Rupert spillway

Present for the � rst gate opening at the Rupert spillway: SEBJ occupational health and safety o� cials, Environnement Illimité and Ingénierie mise en eau.

Over a � ve-day period, at a rate of two operations per day, the Rupert River’s � ow was gradually ramped up to 416 m3, as planned.

My left or the other left?

LP – It’s not always easy to � gure out what’s left or right since it all depends where you’re standing. In building a powerhouse, there aren’t two lefts or two rights. To speak the same language, you have to be looking downstream (in the direction of � ow) to name the two banks correctly.

So, let’s recap—upstream is where the � ow is coming from and downstream is where it’s going. So, facing downstream, that bank on the right is the right bank. Now it makes sense!

MAKING SENSE OF ITDoes distinguishing the left bank from the right bank and upstream from downstream make your head swim?

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MEM – By de� nition, a spawn-ing ground is an aquatic habitat where various � sh species lay and fertilize their eggs at speci� c times of the year *.

Is it just a pile of stones in the water? Not only—and not exactly!

Several design criteria must be met. First, you have to be familiar with the characteristics of the breeding grounds of species that will use it. You also have to select a natu-ral site, if one is available, that corresponds to those characteristics, otherwise you have to create it.The substrate—the material that forms the bed of the stream or river and serves as a support for living or-ganisms—should essentially be composed of natural stones that are � uvial in origin, that is to say, stones that are already resistant to water conditions. They can vary in dimension from 40 to 1100 mm, depend-ing on the calculated position.

NF – In accordance with the Boumhounan Agree-ment, an average of 30% of the Rupert River’s � ow is restored annually at the Rupert dam site for species maintenance.

This instream � ow was established following an envi-ronmental impact assessment inspired by the Québec government’s policy on instream � ow for protection of � sh and their habitat. The assessment took into ac-count the species present in the river, their biological periods and their special needs in terms of habitat.

Five species are considered representative of the Rupert’s � sh community: lake sturgeon, walleye, northern sucker, white sucker and lake white� sh. They occupy the entire reduced � ow stretch of the river

Spawning grounds: underwater mathematicsIn fact, spawning ground design is based primarily on major mathematical equations. Among other things, these equations can be used to establish the best location for a spawning ground on the basis of � ow velocity, � ow volume, water depth and sediment movement. The spawning ground is also laid out to ensure maximum stability and to with-stand spring � oods and ice movement that could move the substrate’s small stones and destroy the eggs. The risk of

erosion of the substrate due to rock and sediment abrasion in the water is minimized and even eliminated by stabilizing the banks and trapping � ne particles using a � lter.

Impressive dynamics! Now you know what to answer when someone asks: Is it just a pile of stones in the water?

Instream ¡ ow design of the Rupert Riverand breed in areas of shallow rapids, which are sensitive to changes in � ow.

A modeling approach was used to determine the minimum � ow needed to protect the spawning grounds of the target species. Actually, a precise relationship between � ow and habitat is involved. To establish this relationship two kilometre-long sections, located at KP 281 and KP 216, were selected and many physical and biological surveys were conducted.

The results were interpreted in a way that ensures that the se-lected instream � ows will e� ectively protect breeding habitats and the sustainability of the species studied.

*(TRADUCTION) MULTI Dictionnaire de la langue française, DE VILLIERS Marie-Eva, Québec Amérique, 4e Édition, 2003.Reference: Aménagements pour l’ichtyofaune - Ouvrage de restitution de la Lemare, Énoncé d’envergure Génivar Société en commandites, Juin 2008, Q107523

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When planning the projects, Hydro-Québec Équipement et services partagés and SEBJ ensure that they are implemented in compliance with schedules, costs, quality, environment and human safety.

No objective-related deadline can justify endangering your health and safety or anyone else’s. Methodical planning, development and dissemination of safe work procedures, as well as compliance with regulations, should be emphasized, promoted and, most importantly, become part of your daily routine.

When you do your part, taking action before or during construction and other

activities to eliminate or control hazards at the source and correcting hazardous situations, you are helping to establish a safe environment for everyone.

Hydro-Québec and SEBJ are Québec institutions that strive to accomplish major high-quality projects involving workers, partners and sta� . I am counting on you to work towards this goal together.

Normand BéchardDirector – Eastmain Projects

Safety—our priority

MV – A simulation of the use of fall protection equipment was held at the Eastmain-1-A and Sarcelle jobsites. Martin Savard, of SPI Sécurité, and Guy Dufour, a representative of the � rm SALA, showed workers the importance of a properly adjusted harness and spoke about new technologies.

During the simulation, Denis Belley of CRT-Hamel played the part of guinea pig.

THE HARNESS—AN ALLY Successful simulation!


Pro�

le

MEM – Her interest in the natural en-vironment at the family cottage in the Eastern Townships and her obvious skills in science led Isabelle Bertrand to opt for lengthy studies in environ-ment. At 28, she has already been working on the project for 3 years. After a stint with the Eastmain envi-ronment team until March 2009, she joined the Rupert diversion project.

Always smiling, she exudes a natural energy! She is thrilled with her experi-ence at the jobsite—the diversity of tasks, multiple responsibilities and freedom of action make it very reward-ing. “It’s a unique opportunity to work with people who have so much experience in the � eld.

SEBJ-HQ promotes knowledge transfer to maintain a leadership position,” she said proudly. It’s an example of the signi� cant room being made for young people.

Bright eyed, she explains how proud she is of the results of environmental work. “My chal-lenge is to make sure everything is done ac-cording to environmental requirements. I like it when the government approves our approach. I like it when the Crees tell me they are satis� ed with the drinking water in Waskaganish. The human environment is very important to me. The beauty of a project is reconciling points of view, � nding common ground.”

It’s a sure bet that young people of this calibre will convince us to meet future environmental challenges.

CL – May 2010 was Environment Month. It was observed throughout the workcamps of the Eastmain-1-A/Sarcelle/Rupert project. For the occasion, several activities to educate people about nature, outdoor sports and mitigation measures were organized by the Environment team.

Tours, spring cleaning days, hiking and canoe races are some examples of the many activities that will be held until the end of July in some workcamps. The first, held Sunday, May 2, was a huge success; some

France Brûlé, SEBJ Environment Protection Manager, during the tour of environ-mental facilities

Tour of diked bay BE-07: the visitors discovered idyllic sites.

forty workers took part in the tour of the environmental facilities around Eastmain workcamp. France Brûlé, SEBJ Environment Protec-tion Manager, eloquently described five environmental structures designed for the Eastmain-1 hydroelectric development project.

For dates of upcoming activities, keep an eye on the bulletin boards or visit the special “Mois de l’environnement” section at www.extranetsebj.ca.

environment month at the jobsite

Making room for youth!

Isabelle BertrandTechnical Assistant – Environment


Maximum recommended sh consumption Recommendations for Eastmain and Opinaca reservoirs, Boyd Lake and the Eastmain River (between Eastmain and Opinaca reservoirs) Brook trout Walleye Pike (speckled trout)

Adults (except pregnant women) 8 meals/month 1 meal/month 1 meal/monthPregnant women 2 meals/month Not recommended Not recommended

In comparison, the recommendations for natural environments

Adults (except pregnant women) No restrictions 4 meals/month 4 meals/monthPregnant women 8 meals/month 2 meals/month 2 meals/month

N.B.: One meal equals 230 grams or 8 ounces.

The Weh-Sees Indohoun Corporation

CD – The WSI is a Cree/Hydro-Québec joint venture. Its mandate is to oversee the sport hunting and � shing activities of project workers and other non-Aboriginal land users to ensure the conservation of wildlife and � sh in the area.

As was the case in recent summers, anyone wanting to � sh in WSI territory must have a WSI pass, in addition to a � shing li-cense from the Québec government. The pass is available free of charge at workcamp WSI o² ces from Monday to Sunday, from noon to 10 p.m.

WSI employees monitor catches to ensure that when the quota established by the MNRF for a lake is reached, it is closed for the rest of the season. Anglers must return the passes to the WSI after their � shing trip, otherwise the maximum number of catches per angler will be recorded for the lake. This means that the lake will reach its quota quickly, after which � shing is prohibited there.

Fishing and mercuryOn June 1, sport � shing began in the Eastmain-1-A/Sarcelle/Rupert area. As in previous years, the 2010 season will be managed by the Weh-Sees Indohoun (WSI) Corporation in association with the Ministère des Ressources naturelles et de la Faune (MRNF).

Since the early 1980s, Hydro-Québec has been conducting extensive research on mercury. Studies on this subject have shown that mercury levels in Aboriginal people and anglers are well below the threshold at which the � rst e� ects related to mercury (numbness in � ngers and toes) could appear.

Fish consumption and mercury

Mercury is a naturally occurring element in the lakes of northern Québec. The impoundment of hydroelectric reservoirs leads to the transformation of the mercury in vegetation and flooded soil and its circulation in the aquatic environment. This results in an increase in mercu-ry content in fish, which may last for about 10 to 35 years, depending on the species of fish and type of reservoir.

As expected, the mercury levels of fish in Eastmain and Opinaca reservoirs, in the Eastmain River between these two reservoirs, and in Boyd Lake are influenced by the im-poundment of Eastmain reservoir. The increase in mercury content of fish will continue for several more years. This change calls for caution in eating fish from these waters.

The following table gives recommendations regarding � sh consumption. Anglers should make sure they do not ex-ceed the level of mercury exposure deemed safe by public health agencies.

A background document on mercury and � sh consumption is available at the WSI o² ces. For more information about mercury, you can also visit Hydro-Québec’s website on this subject at http://www.hydroquebec.com/sustainable-development/documentation/mercure.html

Documents

Journal Eastmain Juin 2010 eng