Water Power and Dam Construction

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WWW.WATERPOWERMAGAZINE.COM OCTOBER 2009 41

PLANNING & PROJECTS

to the unknown inﬂuence of overland ﬂooding from ungauged hydro-

logical basin inputs,” Fritz says. “A seamless, highly accurate digital

elevation model [DEM] for the entire Red River Basin will enable

ﬂood managers to more accurately estimate and model the ungauged

hydrological ﬂows entering the Red River system.”

SECUR IN G INTERA GE NCY FUND IN G

The long path to funding the initiative started in 2000 with

the formation of the International Water Institute within

North Dakota State University at Fargo. Organised

by recommendation of the International Flood

Mitigation Initiative, which is funded by the

Federal Emergency Management Agency

(FEMA), the institute is tasked with coordinat-

ing watershed education, information and research

in the Red River Basin.

In its first year, the institute hosted a digital elevation

meeting to explore terrain-mapping technologies and potential

funding opportunities. Meetings continued annually, and letters of

support for a large-scale mapping programme were generated, yet

obtaining funding for the estimated project remained an obstacle.

Following a meeting in 2005, Fritz requested a resolution of sup-

port from the Minnesota Red River Watershed Management Board

along with a ﬁnancial commitment. The board agreed, authorising up

to US$500,000 if matching contributions could be secured from its

counterpart in North Dakota and from the federal government.

Over the next two-and-a-half years, Fritz organised an aggressive

funding strategy that would eventually include 13 local, state and

federal partners. “Obtaining the ﬁnancial commitment from local

and regional entities was relatively easy because they were close to

the problems, had vivid memories of the 1997 ﬂood and the need

for better elevation data, and they understood how they could use

the data to improve response to ﬂood events and make defendable

resource management decisions,” Fritz explains. But as he moved up

the government ladder, the challenges increased substantially due to

limited budgets with different funding priorities. “There were even

some strongly opposed to the project because they believed it was

technologically impossible,” he says.

Working with state legislators and the congressional delegation, Fritz

did eventually secure full funding in 2007. He credits US Senator Byron

Dorgan from North Dakota, Minnesota state Senator Keith Langseth

and North Dakota state Senator Tom Fischer for overcoming the ﬁnal

budget challenge. A formal request for proposals was issued nationally

by the institute in November of that year. In December, Fugro Horizons

of Rapid City, South Dakota, was selected as the most qualiﬁed ﬁrm to

perform the Red River Basin Mapping Initiative.

RIGHT TECHNOLOGY AT THE RIGHT TIM E

The funding opposition Fritz faced from state government ofﬁcials

who believed the project was not technologically feasible wasn’t

completely unfounded. The project required a 15cm vertical accu-

racy root mean square error (RMSE) to support FEMA standards for

ﬂoodplain mapping. Given the large project size -– 108,000km

– and

the goal to complete the project within a two-and-a-half year time

frame, the project seemed daunting, especially when using standard

airborne LiDAR mapping technology.

In 2007, however, Leica Geosystems released its Leica ALS50-II

airborne laser scanner system, which included numerous improve-

ments over existing technology. With a maximum pulse rate

frequency of 150,000 pulses per second and the ability to main-

tain clean pulse patterns at higher acquisition altitudes, the Leica

ALS50-II allows for more efﬁcient and cost-effective LiDAR data

collection, gains that are realised with the addition of Leica’s new

Multiple Pulse in the Air (MPiA) upgrade. When equipped with

MPiA, the ALS50-II can ﬁre a second outgoing pulse prior to receiv-

ing all returns from the ﬁrst outgoing pulse. The result signiﬁcantly

increases point densities for a given set of collection parameters

compared to conventional LiDAR technologies.

Fugro Horizons and its airborne partners on the project, Fugro

EarthData and North West Geomatics (also known as North West

Group), had each invested in an ALS50-II MPiA system that year.

“For us, this new technology really made the Red River project pos-

sible,” says Guy Meiron, vice president of engineering for Fugro

Horizons. “The ability to ﬁeld match three Leica ALS50-II MPiA sys-

tems for the same mass collect meant we could ensure a high standard

of data consistency across the project.”

In addition to the LiDAR data collection, the project also calls

for concurrent leaf-off imagery over the central corridor of the Red

River. As a quality control measure, the imagery will be used to deﬁne

LiDAR point classiﬁcations throughout the toughest vegetation along

the Red River. The imagery will also provide a basis for future photo-

grammetric collection of water-body and terrain breaklines to further

supplement the LiDAR-based DEM.

MAKIN G THE MOS T OF MODE RN TOOLS

Even with the advantages of the latest-generation airborne LiDAR

technology, meeting the project delivery schedule of two-and-a-half

years is a huge undertaking, especially given the relatively small

window for data collection between long periods of snow cover. To

meet this challenge, the data acquisition mission is designed to take

place in ﬁve phases during three spring and two fall ﬂying seasons.

Each phase was originally planned to cover about 21,000km

acquisition and processing with the ﬁrst acquisition beginning in spring

2008. With three aircraft dedicated to LiDAR collection and one aircraft

for the photography acquisition, the Fugro Horizons team was onsite

from mid-April to the end of May. Looking to capitalise on what turned

out to be optimal ﬂying conditions, the team increased their anticipated

collection of 31,000km

of ﬂight-line data.

LiDAR data were acquired at 2400m above mean terrain (AMT) from

three twin-engine aircraft. The ALS50-II systems were set to collect data

at a 45-degree ﬁeld of view with an average post spacing of 1.37m and

reﬂection intensity values of 3+4 return pulse mode – ie, recording up

to four LiDAR returned pulse signals at a time. Color aerial photogra-

Above: The National Guard transported U.S. Geological Survey personnel from

East Grand Forks, Minnesota, to Grand Forks, North Dakota., by way of the

ﬂooded Sorlie Bridge. Photo courtesy of the U.S. Geological Survey.

42 OCTOBER 2009 INTERNATIONAL WATER POWER & DAM CONSTRUCTION

PLANNING & PROJECTS

phy was acquired at 5300m AMT using a 15cm focal length, ﬁ lm-based

Zeiss RMK TOP 15 camera, which was equipped with a high-resolution,

distortion-free lens and forward-motion compensation. Both data col-

lection types employed airborne GPS, and the LiDAR collection further

employed inertial measurement unit (IMU) technology for position and

orientation information thereby reducing the number of GPS ground

survey points needed to control the mapping output.

Over the course of four-and-a-half weeks, the ﬂ ight crews averaged

nine data-acquisition ﬂ ights per week with a maximum of 15 mobili-

sations when conditions were ideal. In the end, the team’s mileage for

a total of 415 ﬂ ight lines far exceeded expectations for a single aerial

data acquisition phase. The total land area mapped during this ﬁ rst

mission covered almost 47,000km

, nearly 26,000km

more than

called for in the original contract.

DATA PROCESSING

Using its own proprietary bore-site calibration software, Fugro

Horizons preprocessed the raw LiDAR, GPS and IMU data to the

required 15cm vertical and 1m horizontal RMSE accuracy require-

ment. The data set for each ﬂ ight line was also checked to ensure

project area coverage, detect data gaps between overlapping ﬂ ight

lines and evaluate tension/compression areas (sections where data

points were more or less dense than the average project-speciﬁ ed post

spacing). Production staff then processed the LiDAR data into the

project coordinates removing overlaps and clipping the data sets to

extend a buffer area surrounding the project boundaries.

Surfacing of the total data set, also achieved with proprietary soft-

ware, eliminated noise and other obvious erroneous elevation points.

Computer algorithms were used to perform automated removal of

some structures and vegetation to derive the bare-earth elevation

model. Staff then edited the surfaced bare-earth LiDAR data and

stereo imagery using softcopy photogrammetric workstations with

3D viewing and compilation capabilities.

QUALITY CONTROL

“Under real-life project application and stringent quality control and

assessment, the high accuracies we are achieving over the Red River

Basin are a direct result of the most advanced LiDAR instrumentation

and good project execution,” says Paul Harwig, president of Fugro

Horizons. “Enabling a higher-quality DEM than previously possible,

these acquisition and processing advancements are also working to

eliminate some of the recognised difﬁ culties with determining ortho-

metric heights from LiDAR data.”

Airborne acquisition for the second scheduled mission began in

late October 2008. Weather permitting, this mission will complete

data collection over the western half of the project putting the entire

Red River Basin Mapping Initiative on track for completion up to

six months early.

“Expanding the data collection areas for each planned mission has

deﬁ nitely helped us get in front of the project schedule,” explains Gene

Ensor, project manager at Fugro Horizons. “Progressively delivering

9000km

of data every 60 days allows us to ensure that our approach

is sound and required RMSE accuracies are being met or exceeded

before moving on to the next project phase. Keeping the processing

and quality control three to six months ahead of the next LiDAR and

ﬁ lm collect has allowed for resource levelling in all areas.”

When complete, the project will vastly improve upon the current

patchwork of mixed data sets that now comprise the base-level eleva-

tion data for the region. And though improved ﬂ ood management and

response was the primary motivation for this project, the institute and

its funding partners have numerous plans for the LiDAR data, which

will be made publicly available through CLICK, the USGS Center for

LiDAR Information Coordination and Knowledge Web site.

“From the very beginning, the Red River Basin Mapping

Initiative has been about making better and more defendable

resource-management decisions,” Fritz says. “Applications of

LiDAR data are boundless and limited only by our ability to com-

prehend how these data will eventually be integrated with existing

and new technologies to make decisions that enhance the lives of

residents in the Red River Basin.”

David A. Webb, senior regional sales manager for Fugro

Horizons, Rapid City, South Dakota, US. Email : dave.

webb@fugrohorizons.com

For more information, visit www.fugrohorizons.com or

www.internationalwaterinstitute.org. The CLICK Web

site is at lidar.cr.usgs.gov

IWP& DC

The collection of highly accurate LiDAR data

is expected to improve ﬂ ood management and

response in the Red River Basin. Illustration by

Greg Geiger

WWW.WATERPOWERMAGAZINE.COM OCTOBER 2009 43

PLANNING & PROJECTS

For over 30 years the authors of Construction Project

Management have been providing construction

professionals with an indispensible, on-the-job guide.

Here we provide an insight into the latest edition of this

408 page publication

Under one cover: 30 years

of project management

U n d e r o n e c o v e r : 3 0 y e a r s U n d e r o n e c o v e r : 3 0 y e a r s

ONSTRUCTION projects are unique – no two jobs are

ever the same. They are intricate, time-consuming under-

takings. Each structure is tailored speciﬁ cally to suit its

environment, arranged to perform its own particular

function, and designed to reﬂ ect personal tastes and preferences.

The vagaries of the construction site and the possibilities for crea-

tive and utilitarian variation, of even the most standardised build-

ing product, combine to make each construction project a new and

different experience.

The construction process is subject to the inﬂ uence of highly variable

and sometimes unpredictable factors. The construction team, which

includes architects, engineers, building tradesmen, subcontractors,

material dealers, and others, changes from one job to the next. All the

complexities inherent in different construction sites – such as subsoil con-

ditions, surface topography, weather, transportation, material supply,

utilities and services, local subcontractors, labour conditions, and avail-

able technologies – are an innate part of construction.

Consequently, construction projects are typiﬁ ed by their complexity

and diversity and by the non-standardised nature of their production.

The total development of a project normally consists of several phases

requiring a diverse range of specialised services. In progressing from ini-

tial planning to project completion, the typical job passes through succes-

sive and distinct stages that demand input from ﬁ nancial organisations,

governmental agencies, engineers, architects, lawyers, insurance compa-

nies, contractors, material manufacturers and suppliers.

During the construction process itself, even a structure of modest

proportions involves many skills, materials, and literally hundreds

of different operations. The assembly process must follow a natural

order of events that constitutes a complicated pattern of individual

time requirements.

As Clough and Sears highlight above in the introduction to their new

book, all construction projects involve a great deal of time and expense.

Therefore in order to ensure that they are completed within the estab-

lished time and cost limitations, close management control is required.

For more than 30 years, Construction Project Management: A

Practical Guide to Field Construction Management by Clough and

Sears has been considered the pre-eminent guide to the critical path

method (CPM) of project scheduling. The objective of this book is

to present and discuss the management of ﬁ eld construction projects.

The text also develops and discusses management techniques direct-

ed towards the control of cost, time, resources, and project ﬁ nance

during the construction process. Emphasis is placed on practical and

applied procedures of proven efﬁ cacy and examples relate to ﬁ eld

construction practices.

Effective management of a project also requires a considerable

background of general knowledge about the construction industry. A

chapter is devoted to this in order to familiarise the reader with certain

fundamentals of construction practice that will be useful for a complete

understanding of the discussions presented in later chapters.

S O L I D F O U N D A T I O N S

Published by John Wiley, this 408-page book combines a solid founda-

tion in the principles and fundamentals of CPM with particular emphasis

on project planning, demonstrated through an example project.

The ﬁ fth edition of the book features a thorough analysis of project

cost estimates, time, resource and ﬁ nancial management. Other areas

covered include:

U Complete coverage of planning and scheduling principles that apply

to every type of construction project.

U Expanded coverage of production planning.

U Large foldout illustrations conveniently integrated throughout the book.

This edition also incorporates a range of improvements. New

pedagogical devices improve absorption of the material. Updated

labour, material, and equipment pricing is incorporated into the

text. Coverage is also enhanced by discussions of contemporary

planning and management methods such as work breakdown struc-

tures (WBS) and the earned value management system (EVMS).

Through the use of case studies, readers are given project manage-

ment problems and hands-on project management experience.

The authors have drawn upon their wealth of construction and

management experience in this publication. S Kekoi Sears has

extensive experience managing large construction projects world-

wide. He is a senior programme manager for CH2M Hill on the

London 2012 Olympic Park in the UK. Glenn A Sears is an active

consultant in construction engineering and management, and an

emeritus professor of civil engineering at the University of New

Mexico. Richard H Clough, deceased, was dean of the College of

Engineering at the University of New Mexico. He was a fellow of

the American Society of Civil Engineers and was considered to be

one of the leading American educators in construction engineering

and management.

R E F E R E N C E T O O L

Thorough and up to date, the ﬁ fth edition of Construction Project

Management is described as a ‘superb’ text for students and an indis-

pensable on-the-job reference for civil engineers, builders, architects,

and other construction professionals.

For more information visit

http://www.researchandmarkets.com/product/29c154/

construction_project_management_a_practical

or see www.wiley.com

ISBN: 978-0-471-74588-4

IWP& DC

44 OCTOBER 2009 INTERNATIONAL WATER POWER & DAM CONSTRUCTION

PLANNING & PROJECTS

HE energy storing wind dam project from New Zealand

based ﬁrm Green Zephyr began with the intent of coupling

wind power with pumped water storage, without the need

for large electricity networks to connect wind farms with

hydro dams. The wind dam was designed from the start to have no

complicated control systems. It would utilise simple components and

technology, enabling it to be used in places where access to expensive

expertise and technology may not be available. The project started in

2001 and has so far been run as an in-house development.

W H A T I S A N E N E R G Y S T O R I N G W I N D D A M ?

An energy storing wind dam uses wind to pump water. This water

is stored for electricity generation on demand via a hydro genera-

tor. Other applications include irrigation or any situation requiring

a raised water source.

The structure itself is made up from many hexagonal ducts, each

housing a wind turbine and water pump within the duct. Each row

of ducts receives water from the layer below and pumps it to the layer

above. Each duct is approximately 5.4m tall (point to point) and

varies in length depending on its position in the wind dam. Ducts near

the bottom of the dam are longer, ducts at the top are shorter.

Instead of using electricity to drive a water pump, wind energy is used.

A water pump is connected directly to a wind turbine via a common

shaft. When the wind blows the wind turbine drives the water pump.

A single wind dam turbine is approximately 4m in diameter. At this

size it does not have the capacity to pump a large amount of water,

however many stacked together are used to gain the desired pumping

capacity. To make this possible each turbine module is placed inside

a duct or tube to provide a separation between turbines to minimise

interference. The opening of the duct is hexagonally shaped for opti-

mal stacking and reduces to a circular shape centrally to accommo-

date the turbine. This wall of turbines, or energy storing wind dam,

requires a water source and an upper storage reservoir.

The number and size of turbines relates to the amount of energy extracted

from the wind. Either one of these parameters has to change to increase the

wind energy collected. With free ﬁeld turbines, a much larger land area is

required because the turbines can interfere with each other. Adequate spacing

is required between turbines to avoid interference for optimal performance.

However, an energy storing wind dam accommodates the close stacking of

turbines due to the separation attained by the ducts minimising interference.

This means there is a greater turbine density or wind collection area ie the

wind sees the wind dam as one large turbine.

Energy storing wind dams have the huge advantage of being able

to store energy. Duration of energy storage depends on the size of

the water reservoir and the electrical consumption, but the design

is for approximately 24 hours. Conventional wind turbines do not

have this luxury and so must be used in an electrical grid. Here other

modes of electrical generation can be varied to compensate for the

sometimes inconsistent energy output from wind turbines.

T E S T I N G T I M E S

Twenty three 1/8th scale energy storing wind dam ducts were manu-

factured in Green Zephyr’s workshop, including a scale foam nacelle in

each. These 23 ducts were assembled to create the model to be tested.

Our results showed that the array of ducts had an effect of levelling

out the wind ﬂow, with all the ducts showing relatively similar wind

speeds. Testing also showed that there was not a largely signiﬁcant

drop in relative wind speed through the ducts for wind angles up to

400 off axis. This means that the wind dam has a useful wind range

of 1600 (as it is unable to yaw rotate into the wind).

The energy storing wind dam project – ﬁrst discussed in IWP&DC in January 2006 – is

nearing the stage for full-scale construction. Stephen Wilson provides an update on this

innovative project, while also paying tribute to the wind dam’s inventor,

Allan McCreadie, who passed away in September 2009

Wind and water – working together

Above: 1/8th scale model of an energy storing wind dam structure

Turbine/water pump assembly

Water

pump

Motor

Electricit

Water

pump

Wind

Turbine

Above: Motor/water pump assembly

WWW.WATERPOWERMAGAZINE.COM OCTOBER 2009 45

PLANNING & PROJECTS

We designed a wind turbine with the following properties:

U Ability to yaw into the wind so the turbine will rotate in the same

direction regardless of which direction the wind is travelling down

the duct.

U Geometry that allows the sail boom (like a yacht) to set and swing

without changing the trailing edge tension.

U A minimal parts count mechanism to give a low velocity, highly

cambered aerofoil at the blade base, blending to a higher velocity

less cambered tip aerofoil.

U Camber changes with sail setting to favour both ﬂ ow directions.

U A sail cut and support that allows the shear movement required.

U A method of preventing centrifugal air pumping through the inter-

nal sail space (double surface), which would otherwise ‘blow-up’

the sail tips and destroy the aerofoil section.

Successful construction and testing of a small scale (27%) working

turbine has been conducted and Green Zephyr is in the process of

constructing a full size working prototype.

Results show that our 27% scale wind turbine performed well, with a

coefﬁ cient of performance of 0.3 when the tip speed ratio was 5.

We have also designed and tested our own pump. This was

because there were no conventional water pumps with the exact

performance range we needed for the wind dam. We began with

small scale testing and have ﬁ nished with a full scale pump. The

target efﬁ ciency was 60%.

The water pump performed to a satisfactory level for proof of

concept, obtaining the desired 60% efﬁ ciency across the operational

range for the wind dam. There is potential for further improvements

in pump efﬁ ciency by optimization of the impeller, with scope for

computational ﬂ uid dynamics analysis.

F U T U R E I S S U E S

Sadly, Allan McCreadie, the inventor, ﬁ nancial provider and

chief design engineer of the energy storing wind dam project died

unexpectedly in September 2009. The future of the energy storing

wind dam project is therefore entirely uncertain with no project

funding.

If the project were to continue the future plans are as follows:

U Complete development and construction of full size wind turbine

and related structural components.

U Construction of full size duct to house wind turbine and water pump.

U Testing of fully working duct.

U Construction of a fully working pilot energy storing wind dam

(which will require partnership with an electricity supplier and/or

large scale funding).

More details about the project can be found at

www.greenzephyr.co.nz, by emailing info@greenzephyr.

co.nz or tel: +64 9 298 0228.

Visit www.waterpowermagazine.com to view a tribute to

the inventor of the wind dam, Allan McCredie

IWP& DC

Side view End view

Storage

reservoir

Water

source

Wind

dam

Mass

Check valve with

extended torque arm

Flow meter

Water

tank

Pump

Above: Single turbine assembly

Above: Multiple turbine assemblies in series

Above: Energy storing wind dam system

Above: Pump testing rig

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46 OCTOBER 2009 INTERNATIONAL WATER POWER & DAM CONSTRUCTION

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I N T E R N A T I O N A L

& DAM CONSTRUCTION

Water Power

PROFESSIONAL DIRECTORY

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48 OCTOBER 2009 INTERNATIONAL WATER POWER & DAM CONSTRUCTION

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Fax: +358 204 84 4233

Email: timo.norvasto@metso.com

Web: www.metsofoundries.com

Providing water control solutions through thoughtful engineering,

innovative design, attention to detail and outstanding customer

service. Contact us for inflatable water control gates and rubber

dams.

PO Box 668, Fort Collins, CO 80522 USA

Tel: 970-568-9844

www.obermeyerhydro.com

• Custom Design Hydraulic Cylinders

• Servomotors

• Piston Accumulators'

•

Hydraulic Power Units

•

Control Panels

www.doucehydro.com

Douce Hydro FRANCE, USA and GERMANY

Tel France: + 33 / 3 22 74 31 08 ; E-mail: afleroy@doucehydro.com

el USA: + 1 / 586 566 4725 ; E-mail: fvandenbulke@doucehydro.com

Tel Germany: + 49 / 177 398 37 78 ; E-mail : ublase-henke@doucehydro.com

BEARINGS

PAN

bronzes

and

PAN

-GF

self-lubricating bearings

Since 1931

- Superior quality with

• Highest wear resistance

• Low maintenance

• Or maintenance free

Extended operating life

PAN-Metallgesellschaft

P.O. Box 102436 • D-68024 Mannheim / Germany

Phone: + 49 621 42 303-0 • Fax: + 49 621 42 303-33

ontakt@pan-metall.com • www.pan-metall.com

BEARING OIL COOLERS

EXECO, Inc. ... a H

at Ex

hanger E

gineering Co

el: +1 (920) 361-3440 • Fax: +1 (920) 361-4554

E-Mail: info.wpd@hexeco.com • Web: www.hexeco.com

IL COOLERS

For

THRUST and

GUIDE

BEARINGS

CONCRETE COOLING

• COLD & ICE WATERPLANTS

• FLAKE ICE PLANTS

• ICE DELIVERY & WEIGHING SYSTEMS

• ICE STORAGES

KTI-Plersch Kältetechnik GmbH

Carl-Otto-Weg 14/2

88481 Balzheim

Germany

Tel:/Phone: +49 - 7347 - 95 72 - 0

Fax: +49 - 7347 - 95 72 - 22

Email: ice@kti-plersch.com

Website: www.kti-plersch.com

CONCRETE COOLING

FILTRATION EQUIPMENT

WWW.WATERPOWERMAGAZINE.COM

kuenzameri ca@kuenz.com

ww w.kuenzameric a.com

TRASH RAKE CLEANING

POWER HOUSE CRANES

America I n c.

kuenzamerica@kuenz.com

www.kuenzamerica.com

TRASH RAKE CLEANING

POWER HOUSE CRANES

America I n c.

CIVIL ENGINEERING:

U Þ`iÀÃ] «ÜiÀ ÕÌÃ >` VÌÀÃ

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>` iiVÌÀV ÃÞÃÌiÃ vÀ `> }>Ìi

«iÀ>Ì Õ« Ì >ÕÌ>ÌV ÀiÃiÀÛÀ

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www.montanhydrauli k.com

WORLD MARKETPLACE

WWW.WATERPOWERMAGAZINE.COM OCTOBER 2009 49

CLASSIFIED

www.waterpowermagazine.com

HYDROMECHANICAL

EQUIPMENT

HYDRO POWER

PLANT EQUIPMENT

HYDRO POWER

PLANT EQUIPMENT

HYDRO POWER

PLANT EQUIPMENT

ANDRITZ HYDRO GmbH

Penzinger Strasse 76, A-1141 Vienna, Austria

Phone: +43.1.89100-2659, Fax: +43.1.8946046

contact@andritz-hydro.com • www.andritz-hydro.com

Your partner for renewable energy.

Hydro Power.

e focus on the best solution – from water to wire.

Voith Hydro Holding GmbH & Co. KG

Alexanderstrasse 11

89522 Heidenheim/Germany

www.voithhydro.com

Voith and Siemens Company

! Water power plant equipment

(electrical and mechanical)

! Pumps

! Governors

! Automation

! Modernization of existing power plants

! Hydro power services

! Ocean energies

INSTRUMENTATION

(DAM MONITORING)

Geokon, Incorporated manufactures a full range

of geotechnical instrumentation suitable for

monitoring dams. Geokon instrumentation employs

vibrating wire technology that provides measurable

advantages and proven long-term stability.

The World Leader in

Vibrating Wire Technology

Geokon, Incorporated

48 Spencer Street

Lebanon, New Hampshire

03766

•

USA

Dam Monitoring Instrumentation

•

603

•

448

•

1562

•

603

•

448

•

3216

info@geokon.com

www.geokon.com

Vikas Kothari: Executive Director Tel: 91 11 29565552 TO 55

Om Metals Infraprojects Ltd. Fax: 91 11 29565551

4th Floor, NBCC Plaza, Mobile: 91 98110 68101

ower III, Sector 5, Email: vikas@ommetals.com

Pushp Vihar, info@ommetals.com

Saket, New Delhi, 110 017, INDIA Web: www.ommetals.com

Turnkey EPC contracts for:

•Radial Gates •Trash Racks & TRCM

•

Vertical Gates •Gantry Cranes & EOT

•

Penstocks •Mechanical/ Hydraulic Hoists

•Stoplogs •Draft Tubes

Turnkey EPC contracts for:

•Radial Gates •Trash Racks & TRCM

•Vertical Gates •Gantry Cranes & EOT

•Penstocks •Mechanical/ Hydraulic Hoists

•Stoplogs •Draft Tubes

Om Metals

Reliable and innovative solutions utilizing

over 156 years continuos hydro-electric

experience.

Fully customised supply of turbines,

generators, controls, switchgear &

associated plant up to around 20MW,

including a micro hydro range of turbines.

Japan: Gilbert Gilkes & Gordon Ltd

h-yamamo@rf6.so-net.ne.jp

North America:

Vancouver Island Technology Park

2103 - 4464 Markham Street

Victoria BC V8Z 7X8

b.sellars@gilkes.com

t: 250-483-3883

UK: Gilbert Gilkes & Gordon Ltd,

Canal head North, Kendal,

Cumbria LA9 7BZ

[    M  

hydro@gilkes.com

! World wide referenced water to wire General Contractor

! Turbines and Generators

! Electromechanical Equipment

! Switchgears

! Control Protection Monitoring and SCADA Systems

! Balance of the Plant

! Turn key projects

! Rehabilitation

S.T.E. S.p.a. - Via Sorio, 120 - 35141, PADOVA(Italy)

tel. +39 049 2963900 - fax. +39 049 2963901

Email: ste@ste-energy.com Web: www.ste-energy.com

ISO 9001 CERTIFIED

Contact Diane Stanbury on:

+44 208 269 7854

dstanbury@progressivemediagroup.com

For World Marketplace

advertising opportunities

WORLD MARKETPLACE

50 OCTOBER 2009 INTERNATIONAL WATER POWER & DAM CONSTRUCTION

CLASSIFIED

www.waterpowermagazine.com

SMALL HYDROELECTRIC

POWER SETS

MICRO/SMALL

HYDROELECTRIC POWER SETS

INSTRUMENTATION

(GEOTECHNICAL)

INSTRUMENTATION

(GEOTECHNICAL)

SCREENING

Planning a run-of-river project?

Reduce your capital costs significantly!

Why a coanda intake?

• Eliminates desander

• Protects your investment

from premature wear

and debris.

• Flows up to 25 M3/sec.

• Screens out debris

down to 0.5mm

• Customizable for

a range of conditions

• MAXIMIZES POWER

GENERATION

Partial Discharge?

www.pdix.com

PARTIAL DISCHARGE DETECTION

INSTRUMENTATION

(DAM MONITORING)

Contact Diane Stanbury on:

+44 208 269 7854

dstanbury@

progressivemediagroup.com

For World Marketplace

advertising opportunities

Water Power and Dam Construction - Issue October 2009

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