Water Power and Dam Construction. Issue May 2010
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INTERNATIONAL WATER POWER & DAM CONSTRUCTION MAY 2010
MAY 2010
Serving the hydro industry for over 60 years
Spillway modifications
Designing tailings dams
Diving in
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MAY 2010
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CONTENTS
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DAM
ENGINEERING
ModernPowerSystems
COMMUNICATING POWER TECHNOLOGY WORLDWIDE
COVER: Read details on the
latest equipment for underwater
inspections starting on p40
34
44
24
10
46
PROFESSIONAL DIRECTORY
48
WORLD MARKETPLACE
REGULARS
4
WORLD NEWS
8
DIARY
FEATURES
APPOINTMENTS
7
Executive movements
The latest appointments in the industry
SPILLWAYS
10
Contractor’s build on Capability’s legacy
Spillway modifications are being carried out at Blenheim
Palace dam, a World Heritage site
14
Spillways step up for assessment
An extensive upgrade programme is currently in full
swing at dams owned by Australia’s SunWater
17
Piano Key Weir growth
The relatively recent development of Piano Key Weir
spillways is taking sure steps forward for dam upgrades
SAFETY
20
The dam safety minefield
David Hilyard explains the balancing act which has to
be maintained between dam safety and the efficient utili-
sation of coal resources in Australia
24
Design of a tailings dam for permanent water cover
Details on the design of new dams to be built at a tail-
ings storage facility in Boliden, Sweden
RCC
29
Technical solutions of Bassara Dam
The design of the first RCC Dam in Iraq
34
On the up – the San Vicente Dam raise project
Construction is underway to raise the height of the San
Vicente dam in San Diego County
WAVE & TIDAL POWER
38
Power across the Mersey
An update on the Mersey tidal power project
UNDERWATER INSPECTIONS
40
Advancing underwater robotics
Researching the use of advanced underwater robotics
44
Getting to the bottom of it
The latest products for underwater applications
4 MAY 2010 INTERNATIONAL WATER POWER & DAM CONSTRUCTION
WORLD NEWS
T
HE BRIT ISH COLUMBI A
government has announced
that it will move forward with BC
Hydro’s 900MW Site C hydroelectric
project – the third dam to be built
on the Peace River in northeast BC,
Canada.
The government said it decided to
advance Site C based on the project’s
benets to British Columbians, includ-
ing the fact that, as a third project on
one river system, Site C will generate
30% the electricity produced at the
W.A.C. Bennett Dam with only 5%
of the reservoir area. Site C is also
expected to contribute to the local
and provincial economy by creating an
estimated 7650 direct construction
jobs through the construction period,
and up to 35,000 direct and indirect
jobs through all stages of the project.
The decision to pursue Site C
comes at a time when BC Hydro fore-
casts that the province’s electricity
needs will grow by 20 to 40% over the
next 20 years.
Construction of Site C will be
subject to regulatory approvals, and
ensuring that the Crown’s constitu-
tional duties to First Nations are met.
Site C will now advance to the
regulatory review phase, which will
include an independent environmen-
tal assessment. The regulatory review
phase is expected to take about two
years, and it is anticipated that Site C
will be available for domestic electric-
ity need by 2020.
The regulatory review for Site C
will involve consultation processes,
including opportunities for input
and participation by the public, First
Nations, stakeholders, communities
and customers.
In addition, as part of the envi-
ronmental assessment process, the
project will consider potential environ-
mental and socio-economic effects,
impacts to land and water, and
options for regional benets, such as
infrastructure and supporting recrea-
tional opportunities. Where impacts
cannot be avoided, BC Hydro will iden-
tify and evaluate potential options for
mitigation.
The Site C Clean Energy Project has
been evaluated using best practices
in project planning and development.
This includes a five-stage process
that provides multiple milestones for
assessing the project and deciding
whether to proceed to the next stage.
The provincial government decision
to advance Site C to the third stage
of project planning and development,
including an environmental review,
is based on two years of work by BC
Hydro that included comprehensive
consultations, as well as environmen-
tal and engineering studies.
The BC Hydro report, Stage 2
Report: Consultation and Technical
Review [PDF, 4.9 Mb], along with
35 appended studies and reports,
is available at: www.bchydro.com/
sitec.
BC Govt to advance Site C
WORLD
NEWS
WORLD
NEWS
www.waterpowermagazine.com
Plans for huge marine farm off Scotland
T
HE UK CROWN ESTATE, A
government department that
administers land held nomi-
nally by the head of state, and the
Scottish government have unveiled
a £4B project to build 10 wave and
tidal power sites around the Orkney
islands and the Pentland Firth.
The devices deployed will include
relatively mature technology like
the Pelamis ‘sea snake’, a hinged
machine that generates power by
undulating as surface waves pass
along its length, and the SeaGen
tidal machine, which works from tidal
currents and resembles an under-
water wind turbine, alongside more
experimental projects. In total, the
machines are expected to produce
about 1.2GWe of green energy.
Alex Salmond, Scotland’s rst min-
ister, said the announcement con-
rmed his prediction that the Pentland
Firth region – where the north-east
Atlantic meets the North Sea – would
become the ‘Saudi Arabia’ of marine
energy. The narrow sea channel has
some of the most powerful currents
and tidal surges in the world, with
speeds up to 16 knots or 19mph
recorded. The area also experiences
some of the most energetic waves in
the UK.
Salmond said some estimates sug-
gested the waters could release up to
60GW of power – 10 times Scotland’s
annual electricity usage. Other stud-
ies have suggested that one-third of
the UK’s total electricity needs could
be met by tidal power alone.
“This is a huge milestone on the
way to making that dream a real-
ity,” Salmond said. “Today marks a
major milestone in the global journey
towards a low carbon future, with
the commercial-scale deployment of
marine renewables set to power our
economies and help safeguard the
planet for generations to come.”
As well as the £4B to install them
these schemes are expected to
require up to £1B of extra investment
– from public sources – to build new
national grid connections, harbours
and other infrastructure in Orkney and
Caithness.
The 10 projects, several of which
have already had investment from a
£22M UK government marine energy
fund, are evenly divided between
wave and tidal power station. The
projects are being shared by three of
the UK’s largest power rms, E.ON,
Scottish and Southern Energy (SSE),
which already operates the UK’s larg-
est hydro schemes, and Scottish
Power Renewables, a strong investor
in windfarms.
Edinburgh-based Pelamis Wave
Power, whose sea-snake device has
been tested in Scottish waters already
and is currently underging tests off
the coast of Portugal, will have its own
50MW site in the Pentland Firth and
share three other sites with SSE and
Scottish Power on the west coast of
Orkney’s main island. Its new devices
will each be 180m long and gener-
ate 750kW. Another tidal machine,
SeaGen, features two underwater
propellers attached to a tall column
anchored to the seabed. It will be
installed by Marine Current Turbines
off Orkney and at a 100MW site north-
west of John O’Groats.
Less well known devices include a
more powerful version of Aquamarine’s
existing Oyster machine, in which a
lever hinged at the ocean oor oscil-
lates back and forth with tidal cur-
rents. It will be used for a 200MW
station with SSE Renewables, and its
200 1MW machines are expected to
start producing power by 2015; and
OpenHydro, a large underwater tur-
bine xed to the sea oor and made
by Cantick Head Tida, will harness the
erce tides at a 200 MW site south
of Orkney.
The marine announcement follows
last month’s conrmation that £75B
will be spent developing a much larger
amount of offshore wind power – at
least 25GW – at nine sites around
the British Isles, including two off
Scotland.
Orkney Islands’ council is now
planning to invest more than £20m
to upgrade its harbours and port
facilities to cope with the huge inux
in industrial equipment, ships and
workers involved in these projects,
which will industrialise large areas of
the coastline.
G
DF SUEZ, THROUGH ITS
subsidiary EnerSur, has been
awarded contracts to supply
a total of 662MW of electricity to
Peru following its involvement in the
rst long-term energy auction organ-
ized by distribution companies in
the company.
Energy for the bids will be sup-
plied from Enersur’s existing capac-
ity, and through the construction of a
hydroelectric power plant, Quitaracsa
I, located 500km to the North East
of Lima in the Ancash region. The
plant will have an estimated capac-
ity of 112MW, and will be part of the
National Electricity Grid.
In addition, GDF Suez’s existing
ChilcaUno thermal power plant will
be converted to combined cycle,
increasing the plant’s capacity by
approximately 270MW. This boosts
the total capacity of this plant - which
is located close to Lima - to approxi-
mately 800MW.
The total investment required for
both projects will amount to approxi-
mately 450M euros.
Both projects will be instrumental
in supplying Peru’s growing energy
demands, and will further diversify the
Group’s portfolio. GDF Suez’s contri-
bution of over 380MW new electric-
ity generation is part of its long-term
commitment to Peru and the develop-
ment of its energy sector.
GDF Suez in
Peruvian deal
WWW.WATERPOWERMAGAZINE.COM MAY 2010 5
WORLD NEWS
New funding for US
water power schemes
T
HE US DEPARTMENT OF ENERGY
is to invest up to US$39M over
four years to expand and accel-
erate the development of marine
and hydrokinetic technologies (MHK)
throughout the country.
The department will accelerate
the technological advancement and
commercial readiness of emerging
water power technologies that can
produce renewable, cost-competitive
electricity by harnessing the energy
of waves, currents, tides, and free-
flowing rivers, or energy stored in
ocean thermal gradients. DOE will
use “technology readiness levels” a
tool which has been effectively used
by numerous companies and federal
agencies to measure and compare
the maturity of evolving technologies,
to evaluate and select projects.
This funding opportunity seeks to
leverage private-sector investment
in MHK technologies by providing
cost-shared funding to industry and
industry-led partnerships in order to
advance the technological and opera-
tional readiness of MHK systems and
components. The goal is to effectively
transition leading MHK system and
component designs toward commer-
cialization.
Applications for funding for MHK
technologies are due 7 June 2010.
The complete Funding Opportunity
Announcement can be viewed on the
Wind and Water Power Program’s
Financial Opportunities site at http://
www1.eere.energy.gov/windandhy-
dro/nancial.html.
T
HE INT ER-AM ERI C A N
D e ve l o p m e n t B a nk h a s
announced its intention to
increase its nancing for renewable
energy and climate-related projects in
Latin America and the Caribbean to
$3B a year by 2012.
IDB President Luis Alberto Moreno
made the announcement at a summit
of energy ministers of the Americas
held at the Bank’s headquarters in
Washington, D.C. Representatives
from 32 Western Hemisphere coun-
tries attended the event, including
US Energy Secretary Steven Chu and
Secretary of State Hillary R. Clinton.
At the opening ceremony of the
two-day event, Moreno said the IDB
faces a surging demand for support
from Latin American and Caribbean
countries interested in developing
their renewable energy resources
and in combating the effects of cli-
mate change. IDB lending for ener-
gy-related projects is likely to reach
$1.5B this year, up from $457M
approved in 2008.
“Last month [MARCH], as many
of you know, our Board of Governors
approved in principle a record general
capital increase for the IDB of $70
billion. As a result, when this proc-
ess is concluded, the Bank will have
the capacity to double its clean and
sustainable energy lending again, to
approximately $3B a year, by 2012.
And I am pleased to announce that
this is our intention,” Moreno said.
The expanded lending will allow
the IDB to focus on four broad areas:
stepping up renewable energy invest-
ments in its poorest member coun-
tries; fostering energy integration
throughout Latin America and the
Caribbean; promoting energy effi-
ciency measures across the region
and helping governments establish
climate change mitigation and adap-
tation frameworks.
As an example of the sort of
projects the IDB intends to pursue,
Moreno said the Bank would propose
to the Haitian government the devel-
opment of a new energy infrastructure
to harness Haiti’s wind, solar and
hydroelectric potential. Such an initia-
tive could cost as much as $1B, but
would help the poorest country in the
Western Hemisphere save hundreds
of millions of dollars a year in fossil
fuel imports.
In addition, Moreno said the IDB is
teaming up with the US Department of
Energy and other agencies inside and
outside the region to establish the
Energy Partnership for the Americas
Innovation Center, which will be
staffed by some of the world’s lead-
ing experts in renewable energy and
energy efciency. The center will serve
as a clearing house for knowledge
and an incubator for energy projects
backed by governments and private
sector investors.
IDB to expand lending
for renewable projects
From the Editor
Dear readers,
At the tail end of last year I reported on new research
from the UK’s National Grid that engineering has become
‘an invisible industry’ which is undervalued and under-
mined by outdated stereotypes. Engineering has gener-
ally suffered from a poor image, and training has often
been inadequate or completely lacking. Exacerbating the
problem, many senior people with the experience and
skills most needed are now on the verge of retirement.
As the older generation of engineers start to retire, there
are fewer and fewer new entrants who can gain hands-
on experience or training from these experts, eventually
replacing them in the field.
It is essential that the industry has a pipeline of talent
coming through in the long term to help support the transi-
tion to a low carbon economy, and to meet government
targets for renewable energy generation. Attracting the
younger generation of engineers is a task that everyone
involved in the industry needs to tackle.
Over the past 20 years the engineering community has
witnessed a variety of campaigns, projects and initia-
tives aimed at improving the perception of engineering,
in particular targeting young people. Among these are the
Association of State Dam Safety Official’s Committee on
Education Outreach, which was formed in 2004 with the
purpose of focusing more attention on the promotion of
dam safety engineering as a profession in undergradu-
ate and graduate college-level programs. Another initiative
is Energyzone, an internet service from the UK’s Energy
Institute, which is billed as ‘the most comprehensive guide
to UK energy education and training’. The site provides
advice and information for teachers and students involved
in energy education and promotes energy careers by
providing details of courses, job profiles and opportunities
for employment. Energyzone also features the professional
services provided by the Institute to employees in the
energy industry.
But have these initiatives worked, and just how does the
industry attract young engineers? At International Water
Power & Dam Construction we thought the best people
to ask would be the young generation themselves. So, in
upcoming issues of the magazine, we’ll be talking to some
of the fresh new talent to enter the industry.
In a special series we’ll be including biography informa-
tion and interviews with individuals under the age of 35
who are already making an impact in the global hydro pow-
er and dams arena. We’ll be asking them what attracted
them to the industry, who has been the biggest influence
in their professional life, and what type of projects they’re
working on. We’ll also be asking what advice they would
give to graduates entering the industry.
If you would like to suggest an individual from your com-
pany or organisation that you feel deserves to be included
in this special focus, please contact the editor, Carrieann
Stocks, via email: carrieannstocks@globaltrademedia.com
or tel: +44 (0) 20 8269 7777, briefly detailing why they
should be included. I look forward to hearing from you.
Best wishes
Carrieann Davies, Editor
6 MAY 2010 INTERNATIONAL WATER POWER & DAM CONSTRUCTION
WORLD NEWS
In brief
SKANSKA IS TO BUILD
two new hydro power
plants in Høyanger
Municipality, Sognefjorden,
for Norwegian power
company Statkraft.Under
the contract – valued at
NOK 254M (US$43M) –
the construction rm will
undertake civil engineering
work on the Eiriksdal and
Makkoren plants, which
will have a combined
capacity of 340GWh. The
power plants will be con-
structed to capitalize on the
natural vertical fall in the
Høgsvatnet and Daleelva
rivers, and will replace three
older plants.
RWE NPOWER renewa-
bles has begun construction
of the £2.5M (US$4M)
hydroelectric project being
built at Northumbrian
Water’s Selset Reservoir
in the Tees Valley. RWE
signed at agreement back
in January with the utility
company to develop the
750kW project at the exist-
ing reservoir site. The work
is expected to take around
12 months to complete,
with the project opera-
tional in early 2011.
TWO SMALL HYDRO
plants are among several
new projects approved by
the Board of Investment
(BOI) of Sri Lanka, equat-
ing to an investment of over
US$8.7M. According to
Lanka Business Online, BOI
has signed an agreement
with Nilwala Vidulibala
Company for the develop-
ment of a hydro plant at
Morawaka, which would
require on an investment
of US$3.28M. It has also
approved a US$5.5M deal
for the development of a
4MW scheme at Kirkoswald
Estate, Norwood.
WWF, Three Gorges Corporation
cooperate to protect Yangtze
T
HE WORLD’S LARGEST HYDRO
complex operator – the China
Three Gorges Corporation
(CTGPC) - will cooperate with WWF
to promote sustainable hydro power
standards that could help maintain
healthy Environmental Flows in the
Yangtze River.
A 5 - ye ar M em o r a nd um o f
Understanding (MoU) between CTGPC
and WWF signed in March 2010 aims
to make the Three Gorges Dam’s
operations more sustainable to help
restore crucial environmental ows to
keep the Yangtze, the world’s third-
longest river, in good health.
“The Yangtze is home to over 400
million people – that’s close to one
third China’s population. With so
many people relying on the health of
this river to maintain their livelihoods,
ensuring that the Three Gorges Dam
operates sustainably is a must,” said
WWF Director-General James Leape.
“Greener hydro standards that
improve Environmental Flows for
the world’s largest dam means the
Yangtze’s rich resources have the
chance to be protected for future
generations.”
The MOU also sets the Yangtze
Environmental Flows Project in motion,
which will benet from strengthened
international exchanges, public aware-
ness campaigns on the Three Gorges
Project, as well as the what’s being
done to protect the Yangtze’s valu-
able resources.
“Hydropower can bring huge social,
economic and ecological benets, but
it can also have an impact on the envi-
ronment. The CTGPC is working with
WWF to minimizing the impacts of the
Three Gorges Project and other hydro
complexes to ensure the Yangtze’s
future,” said CTGPC Chairman, Cao
Guangjing.
The agreement comes after two
years of cooperation between CTGPC
and WWF on sustainable dam man-
agement and E-ows modeling. While
the primary focus of the new partner-
ship is minimizing the impact of the
Three Georges Project, the lessons
learned will be adapted and applied
to other hydro projects across China.
Three Gorges Dam is the world’s
largest hydroelectricity plant, spanning
over 2.3km across the Yangtze River.
The dam’s total generation capac-
ity will eventually reach 22,500MW,
which represents about 5% of China’s
total electricity demands.
Dam Safety Awards 2010 – call for entries
T
O ACKNOWLEDGE THE IMPOR-
TANCE of dam safety in the
industry today, and to recognise
the development of new equipment
that will play an integral part in safety
programs worldwide, International
Water Power & Dam Construction
magazine is launching a new awards
scheme, the Dam Safety Awards.
The awards are open to any dam
safety project (from rehabilitation
schemes to new research initiatives)
and new product development initi-
ated between 1 January 2009 and
30 September 2010.
Our awards programme allows the
industry to choose the best of the
best. IWP&DC’s December 2010
issue will publish a selection of lead-
ing dam safety projects and equip-
ment that have been nominated by
utilities, vendors and others in the
industry. By being selected to appear
in IWP&DC, all of these projects and
products will already be recognised
as the best in the industry. Readers
will then get to choose the winning
product and project, with the winners
proled in detail a few months later.
To enter, please send a letter
outlining the details of the project/
product (including dates, scope of
work planned, scope of work accom-
plished, personnel involved), and the
reasons why you feel they should be
considered, to reach us by 4 October
2010. There is no cost to enter.
Send entries to: The Editor,
Carrieann Stocks, via email: car-
rieannstocks@globaltrademedia.
com; fax +44 208 269 7804.
International Water Power & Dam
Construction, Progressive House, 2
Maidstone Road, Foots Cray, Sidcup,
Kent, DA14 5HZ, UK.
Operations re-start at Taum Sauk
A
MERENUE HAS ANNOUNCED
that its 408MW Taum Sauk
pumped storage project in east-
ern Missouri is generating electricity
again after an extensive rebuild follow-
ing the collapse of the project’s upper
reservoir in December 2005.
Earlier this month, the Federal
Energy Regulatory Commission
authorized AmerenUE to resume
normal project operations at the
project. AmerenUE provided FERC a
nal design and construction report
dated March 24 that included cer-
tifications from the utility and its
design engineer and quality control
manager that the project was con-
structed as designed and in accord-
ance with approved plans and
specications. It also submitted a
dam performance and instrumenta-
tion report that detailed the satisfac-
tory performance of the rebuilt upper
reservoir during a test rell program
in March.
AmerenUE reported it complet-
ed a successful test March 20 of
the upper reservoir level control
and protection system, which is
designed to provide adequate and
redundant safeguards to ensure
safe operation through the reser-
voir’s full range of operations.
Paul C. Rizzo Associates Inc.,
AmerenUE’s design engineer and
quality control manager, provided
FERC a commissioning notice to
operate the project March 26.
Ozark Constructors – a ven-
ture partnership formed by ASI
Constructors Inc. of Pueblo West,
Colo., and St. Louis-based Fred
Weber Inc – rebuilt the upper res-
ervoir under the guidance Paul
C. Rizzo Associates Inc. Other
firms that worked on the project
included PayneCrest Electric and
Communications, Haberberger Inc.,
B&P Construction, Castle Contracting
and Tarlton Corp.
Taum Sauk has not operated
since the reservoir’s mountaintop
ring dam breached on 14 December
2005, when 5.9B litres of water from
the plant’s upper reservoir ooded
Johnson’s Shut-Ins state park and
nearby roads.
Here you will find details on some of the executive appointments made by companies within the hydro power and dams industry
over the past few months. To submit details of appointments for publication in a future issue of the magazine,
please send an email to the editor, Carrieann Stocks, at: carrieannstocks@globaltrademedia.com
EXECUTIVE MOVEMENTS
APPOINTMENTS
WWW.WATERPOWERMAGAZINE.COM MAY 2010 7
New CEO for Hydro Tasmania
At its January 2010 meet 21
June 2010.
Hydro Tasmania Chairman
Dr David Crean said Adair has
extensive national and interna-
tional experience at the highest
level in the energy industry.
Ada i r w as P r esi d e nt a nd
CEO o f Senok o P ower Ltd,
Singapore’s largest integrat-
ed electricity generation and
retail supplier for six years to
November 2009. Previously he
was Chief Operating Officer for
Pacific Hydro, one of Australia’s
leading renewable energy busi-
nesses and a major player in
the development of the national
wind industry.
Dr Crean said Adair brought a
wealth of experience to the posi-
tion and was the best person
to lead Hydro Tasmania as it
sought to build on its position
as one of Australia’s leading inte-
grated energy businesses.
A d a i r ’ s p r e v i o u s r o l e s
include:
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Australia - July 1999 - January
2001
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Energy - April 1996 - June 1999
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He is a graduate economist
and a qualified accountant and
is currently a Board member
of the Centre for Energy and
Greenhouse Technologies.
Asbjørn Grundt appointed
Executive Vice President for
Statkraft
As of 1 April 2010, Asbjørn Grundt
was appointed Executive Vice
President and a member of the
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Statkraft.
Grundt will take over the role
of Jørgen Kildahl who recently
resigned from Statkraft. In his
over 10 years in Statkraft, Grundt
has had management positions
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Trading & Origination, and since
2008 he has been in charge of the
Trading & Continental Operations
Business Unit. Grundt holds a
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in Oslo.
“Asbjørn is a highly competent
executive with a lot of business
and industry expertise. He has
been instrumental in building up
and realising Statkraft’s protable
growth in Europe and he was an
obvious candidate for this posi-
tion” said CEO and President Bård
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PPL Corporation names new
Corporate Controller
PPL Corporation has announced
that it is promoting the controller
of its largest business segment to the
position of vice president and cor-
porate controller for the company.
Vincent Sorgi, 38, who has been
controller for PPL’s Supply segment
since 2007, has 16 years of experi-
ence in accounting, controllership,
business planning and economic
analysis.
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who had served as PPL’s vice presi-
dent and controller for three years
before being named vice president-
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ofcer in September of last year.
Sorgi joined PPL in 2006 as nan-
cial director of the company’s PPL
Generation subsidiary. In 2007, he
was named controller for the com-
pany’s Supply segment, the combi-
nation of PPL Generation and PPL
EnergyPlus, the company’s market-
ing business.
Sorgi came to PPL from Public
Service Enterprise Group in New
Jersey, where he served as director
of business operations for PSEG
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in North America. His other roles at
PSEG included corporate and inter-
national controller for PSEG Global,
which operated power plants and
electricity distribution companies
in North America, South America,
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Africa, India and Asia; director
of accounting services for PSEG’s
unregulated business; and princi-
pal accountant for the corporation,
where he was responsible for SEC
and other regulatory reporting.
Prior to his service at PSEG, Sorgi
worked in various roles at Deloitte
& Touche. He earned an accounting
degree from Penn State University
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University. He is a member of
the American Institute of Certied
Public Accountants.
EBRD Managing Director for
Russia appointed
The EBRD has created the position
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the largest of its 30 countries of
operation, and has named Natalia
Vladimirovna Khanjenkova as the
rst holder of this new post.
The appointment, in which
Khanjenkova will report to the
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the rst Russian national to head
the Bank’s operations in Russia. It
will also be the rst time in Bank’s
history that Russia is the sole area of
responsibility of one of the members
of the EBRD’s senior management.
Khanjenkova joined the EBRD
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2007 where she worked as Director
in charge of the Bank’s Infrastructure
and Energy business in Russia. She
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in her new position.
In 2009, the EBRD signed 56
projects in Russia worth Euro
2.4B and accounting for 30% of
the Bank’s total business volume
last year.
The appointment will bring
to eight the number of EBRD
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ated earlier this year to replace the
Bank’s former senior management
structure under which the heads of
its main operational divisions had
previously been known as Business
Group Directors.
The previous Business Group
Director for Russia, Alain Pilloux,
was also in charge of the Bank’s
Agribusiness, Property and Tourism
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EBRD’s newly-created Industry,
Commerce and Agribusiness Group.
In addition to its main ofce in
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work of six regional ofces stretch-
ing from the Baltic Sea to the
Pacific Ocean. These are located
in Ekaterinburg, Krasnoyarsk,
Rostov-on-the-Don, St. Petersburg,
Samara and Vladivostok. The
EBRD employs around 130 staff in
its Russian ofces.
Born in 1961, Kanjenkova is an
economics graduate from the pres-
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*OUFSOBUJPOBM3FMBUJPOT.(*.0
Sri Mulyani Indrawati
appointed Managing Director
of the World Bank Group
World Bank President Robert
B. Zoellick has announced the
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of the World Bank Group. As
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TJODF .T *OESBXBUJ IBT
guided economic policy for one of
the largest countries in Southeast
Asia, and one of the biggest states
in the world, navigating success-
fully in the midst of the global
economic crisis, implementing key
reforms, and earning the respect of
her peers across the world.
1SJPSUPIFSQPTJUJPOBT'JOBODF
.JOJTUFS .T *OESBXBUJ TFSWFE
BT4UBUF.JOJTUFSBOE$IBJSPGUIF
Indonesian National Development
Planning Agency. Between 2008-
2009, she served as Coordinating
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Executive Director on the Board of
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She has been on the faculty of the
University of Indonesia and was
a visiting professor at the Andrew
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Georgia State University.
*OIFSOFXSPMF.T*OESBXBUJ
will supervise three Regions: Latin
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East and North Africa, and East Asia
and Pacic. She will also oversee the
Information Systems Group.
The appointment follows an
JOUFSOBUJPOBMTFBSDIQSPDFTT.T
Indrawati will join the Bank on 1
June, enabling a transition period
with Juan Jose Daboub who com-
QMFUFTIJTGPVSZFBSUFSNBT.BOBHJOH
Director on 30 June.
Let IWP&DC’s readers know about your forthcoming conferences and events.
For publication in a future issue, send your diary dates to: Carrieann Stocks, IWP&DC, Global Trade Media Ltd, Progressive House, 2 Maidstone Road,
Foots Cray, Sidcup, Kent, DA14 5HZ, UK. Alternatively, email: carrieannstocks@globaltrademedia.com, or fax:+44 208 269 7804
DIARY OF EVENTS
8 MAY 2010 INTERNATIONAL WATER POWER & DAM CONSTRUCTION
DIARY
June
8-10 June
Power-Gen Europe 2010
Amsterdam, Netherlands
CONTACT:
Emily Pryor, Conference Manager,
Power-Gen Europe.
Tel: +44 1992 656 614.
Fax: +44 1992 656 735.
Email: paperspg@pennwell.com.
www.powergeneurope.com.
8-10 June
R e n e w a b l e E n e r g y W o r l d
Europe 2010
Amsterdam, Netherlands
CONTACT:
Amy Nash, Conference Manager,
R e n e w a b l e E n e r g y W o r l d
Europe.
Tel: +44 1992 656 621.
Fax: +44 1992 656 735.
Email: amyn@pennwell.com.
www.renewableenergyworld-eu-
rope.com.
23-25 June
International Conferences on
Green Ocean Construction and 7th
Ground Improvement Techniques
Seoul, Republic of Korea
CONTACT:
Conference Secretariat,
CI-Premier Pte Ltd, 150 Orchard
Road, #07-14, Orchard Plaza,
Singapore 238841,
Tel: +65 6733 2922.
Email: cipremie@singnet.com.sg.
www.cipremier.com.
23-26 June
16th British Dam Society Conference
Glasgow, Scotland
CONTACT: Barbara Sharp,
British Dam Society, C/O Atkins
Water, UK.
Tel: +44 1372 756 838.
barbara.sharp@atkinsglobal.com
http://www.britishdams.org
July
27-30 July
Hydrovision International
North Carolina, US
CON TAC T: L ibb y S mit h,
PennWell.
Tel: +1 (918) 831-9560.
Email: LibbyS@PennWell.com.
August
25-27 August
35th Conference on Our World in
Concrete and Structures
Singapore
CONTACT: Conference Secretariat,
CI-Premier Pte Ltd, 150 Orchard
Road, #07-14, Orchard Plaza,
Singapore 238841,
Tel: +65 6733 2922.
Email: cipremie@singnet.com.sg.
30 August - 3 September
ECEE 2010 (14th European
Con f er e nce o n Ear thq u ake
Engineering)
Ohrid, Macedonia
CONTACT: MAEE (Macedonian
As sociati on of Earthqu ak e
Engineering), 73 Salvador Aljende, PO
Box 101, 1000 Skopje, Macedonia.
Tel: +389 2 3 107 701.
www.14ecee.mk.
September
12-16 September
21st World Energy Congress
Quebec, Canada
Let IWP&DC’s readers know about your forthcoming conferences and events.
For publication in a future issue, send your diary dates to: Carrieann Stocks, IWP&DC, Global Trade Media Ltd, Progressive House, 2 Maidstone Road,
Foots Cray, Sidcup, Kent, DA14 5HZ, UK. Alternatively, email: carrieannstocks@globaltrademedia.com, or fax:+44 208 269 7804
DIARY OF EVENTS
WWW.WATERPOWERMAGAZINE.COM MAY 2010 9
DIARY
CONTACT: Organsing Committee,
740 Notre-Dame Street West, 8th
Floor, Montréal, Québec, Canada
H3C 3X6.
Tel: + 1 (514) 397-1474.
www.wecmontreal2010.ca.
22-23 September
8 th I C OLD E uop e a n C l ub
S y mposi u m : D a m S a f e t y -
Sustainability in a Changing
Environment
Innsbruck, Austria
CONTACT: IECS2010 Organizing
Committee, Stremayrgasse 10/II,
A-8010 Graz, Austria.
Fax: +43 316 873 8357.
IECS2010@TUGraz.at.
www.iecs2010.tugraz.at.
27-29 September
Hydro 2010
Lisbon, Portugal
CONTACT: Hydropower & Dams,
Aqua~Media International Ltd, PO
Box 285, Wallington, Surrey
SM6 6AN, UK.
Tel: +44 (0)20 8773 7244.
edit@hydropower-dams.com.
www.hydropower-dams.com.
October
13-14 October
British Hydropower Association
Annual Conference 2010
Glasgow, UK
CONTACT: Ellan Long, British
Hydropower Association, Unit 6B
Manor Farm Business Centre, Gussage
St Michael, Dorset, BH21 5HT UK
Tel: + 44 (0)1258 840934.
Email: info@british-hydro.org.
www.british-hydro.org.
17-19 October
Power Generation & Water
Abu Dhabi, United Arab Emirates
CONTACT: IIR Middle East, Dubai,
United Arab Emirates.
www.powerandwaterme.com.
19-21 October
EFEF 2010 (European Future
Energy Forum)
London, UK
CONTACT: Turret Middle East,
ADNEC House, PO Box 94891, Abu
Dhabi, United Arab Emirates.
www.europeanfutureenergyforum.
com/home.
25-29 October
Risk Management in Hydropower
Development
Trondheim, Norway
CONTACT: International Centre
for Hydropower (ICH), Klaebuveien
153, N-7465 Trondheim, Norway.
Tel: +47 73 59 0780.
Email: mail@ich.no.
www.ich.no.
November
24-26 November
16th International Conference on
Hydropower Plants
Vienna, Austria
CONTACT: Dr. Eduard DOUJAK,
Vienna University of Technology.
eduard.doujak@tuwien.ac.at.
www.viennahydr
:KRGRWKH:RUOG¶VGDPRZQHUV
FDOOIRUZDWHUZD\EDUULHUV"
7KH\FDOO:RUWKLQJWRQ
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waterway barriers needs including debris and trash
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Log jam at flood control dam in Pennsylvania (USA)
10 MAY 2010 INTERNATIONAL WATER POWER & DAM CONSTRUCTION
SPILLWAYS
I
T may be every designer’s dream to transcend a trend and create a
timeless classic, but Lancelot Capability Brown is perhaps one of
the few to achieve just that. When he was commissioned to rede-
sign the landscape of England’s Blenheim Palace in Oxfordshire
in the naturalistic style fashionable of the era, it’s unlikely he would
have imagined that civil engineers and reservoir safety experts would
be working together almost 250 years later to preserve it.
In the mid 1760s Brown began work on the ambitious project
and within four years had ooded the Royal Park’s River Glyme
Valley in Woodstock to create his largest ever lake, and what
would later be described by Lord Randolph Churchill as, ‘The
nest view in England’. Unfortunately, although he had consider-
able experience (being responsible for the design and construction
of at least 40 earth dams), he left neither cross-sections nor speci-
cations for his designs.
Specic information on the dam’s construction, vital for under-
standing its behaviour and designing required refurbishment works,
had to be gleaned from researching the limited information that is
available, and identifying the natural materials present in and around
Blenheim Park that would have been used for its construction.
The meadows, then stretching along the valley floor from
Woodstock Mill to the nearby village of Bladon, were on rich allu-
vial soils, whereas much of the park lies on rocks of the Great Oolite
series. The only clay available was Oxford Clay, found on the high
ground to the west of the dam.
Despite the limited supply of clay, Blenheim’s dam was constructed
of a clay core mixed with limestone gravel, in keeping with Brown’s
usual approach and the standard method used at this time.
Engineered as a single structure, the dam comprised a long earth
ll embankment and an overow cascade, with solid limestone
bedrock foundations.
THE MODERN DESIGN CHALLENGE
Some two centuries later, following the Reservoirs Act 1975, Brown’s
large ornamental lake at Blenheim Palace became subject to regula-
tory inspections.
The dam, which is 200m long, has a 17m wide xed crest spillway
known as the cascade. It also has a low level outlet controlled by a
1.2x0.8m penstock which can regulate water levels.
Internal seepage and local settlement of Blenheim dam’s down-
stream face had taken place for a number of years and a variety of
remedial works had been carried out to ensure the continued safety
of the dam. However, settlement of the downstream face and forma-
tion of local erosion features had been occurring at an increasing rate.
Leakage rates through one section of the dam, measured by v-notch,
were worsening.
The supervising engineer, Richard Dawson of consultants
Peter Brett Associates, was called to site in August 2007. He was
brought in to inspect a local collapse of the crest which revealed
steady leakage over the clay core. He called for an inspection
under Section 10 of the Reservoirs Act and met on site with the
appointed inspecting engineer, Martin Airey of Mott MacDonald,
later the same week.
In addition to the leakage, previous studies had identied a decit
in spillway capacity. Blenheim dam is rated a category B reservoir,
whereby a breach could endanger lives, although not in a community,
and could result in extensive damage to property and infrastructure.
The recommended design ood is a 10,000-year event.
Maintenance staff had also noted that the penstock on the low level
outlet was becoming increasingly difcult to operate, and closing it
completely was not achievable. There were also no facilities in place
to allow inspection of the penstock or the low level outlet in the dry.
As a result, these had not been inspected for some 25 years.
Consequently, the inspecting engineer’s report gave the following
required measures in the interests of safety:
r Additional spillway capacity.
r Remedial works to the embankment and clay core to reduce leakage.
r Inspection and refurbishment of the low level outlet penstock
and culvert.
During the remainder of 2007 and 2008, the team undertook ground
investigation and analysis, further topographical survey and divers’
surveys, together with hydrological and hydraulic studies. A hydro-
dynamic model was constructed to assess options and also incorpo-
rated a smaller reservoir some 2km downstream. A feasibility study
considered various options for coping with the 10,000-year ood,
assessed at 83m
3
/sec.
CONSTRUCTION
The favoured solution was to reinforce the existing primary spill-
way (the cascade) sides, and create a new auxiliary 80m wide spill-
way across much of the dam crest in interlocking concrete blocks
(Armorloc). This would be tied in with remediation and raising of
the clay core.
Following detailed design and preparation of specications later
in 2008, JN Bentley Ltd, a North Yorkshire based civil engineering
contractor, was awarded the construction and repair works contract
in early 2009.
Work on Blenheim dam started in mid-May 2009 and was success-
fully completed in October with nal planting works taking place in
November. In detail, the construction works comprised:
r Remediation of the clay core by excavating a 0.6m wide trench to
remove eroded and breached sections of the clay core and backll-
ing with cement bentonite slurry. Although extensive ground inves-
Contractors build on
Capability’s legacy
When modern safety requirements prompted spillway modications at Blenheim Palace’s
dam, civil engineers and reservoir inspectors had to nd a solution to preserve this World
Heritage Site and ensure structural integrity was not compromised. Kate Crawford reports.