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293 Calea Vitan 031295 Sect.3
Bucharest Romania

T +40 (0) 21 314 72 70
F +40 (0) 21 312 09 25

E info@isph.ro

For sixty years we have been taking the power from water and handing it over to nations.

  • Hydropower
  • Water infrastructure
  • Environment
  • Consultancy
Company

A better future is always made out of straight lines, right numbers and plenty of knowldge.

It is our core belief that only by providing cutting edge design engineering and consultancy services we can help our clients meet and sometimes even surpass their operational and business objectives in terms of sustainability, profitability, reliability and safety.

Not only do we listen and understand the needs of our customers but we often show up with overlooked or innovative ideas that cut costs and improve the overall project. We also take pride in the provision of a friendly service, first class customer care, straightforward high quality advice that can be trusted and good value. We believe that all of these elements are critical to the fostering of long term relationships with our customers.

Last but not least, ISPH aspires to be a reliable international partner to every company, institution and public authority that is developing or operating energy and infrastructure projects. Our past projects are living proof that we strive for excellence and aim to conduct all our activities by the highest standard of professionalism.

185
hydropower
stations
6000
mw installed
capacity
100
experts and
technicians
150
permanent
staff
973
km of tunnels and
galleries
169
dams
of all types
60
years
of engineering
13
countries,
engineering
and
consultancy
services
Memberships and certificates

Written on paper, engraved in concrete.

ISPH is a member of the Romanian Committee on Large Dams (CROMB) and founding member of the International Commission on Large Dams (ICOLD/ CIGB).

In 1996, ISPH, together with other economic agents, founded the Romanian Association of Consulting Engineers (ARIC).

Since 2004, ARIC is a member of FIDIC - International Federation of Consulting Engineers and since 2005 is also a member of EFCA - European Federation of Engineering Consultancy Associations.

Starting with 2010, ISPH is a member of the Romanian Small Hydropower Association. (member of ESHA - European Small Hydropower Association).

For the consultancy and engineering activity conducted in Romania, ISPH is certified in accordance with the legal provisions for:

  • Carrying out studies for water management and hydraulic structures design, regulation works, torrent correction and documentation for obtaining water management permits and licenses;
  • Drawing up environmental balance;
  • Drawing up environmental impact assessments (EIAs);
  • Design of electrical lines, transformer substations, power stations and the electrical part of the hydroelectric power plants;
  • Design of intrusion alarm systems;
  • Design of systems and installations for fire limiting and extinguishing;
  • Design of fire signalling and alarming systems;

Business Valuation as ANEVAR (National Association of Romanian Valuers) member.

Presently, ISPH has over 150 employees out of which over 100 engineers, technicians and CAD operators, covering all specialties required for carrying out the activity, predominantly oriented towards hydroelectric and hydrotechnical investment objectives achievement.

ISPH has also experts certified by MLPTL (Ministry of Public Works, Transport and Housing) and MEC (Ministry of Education and Research) as auditors of projects and/or experts for construction works in accordance with HG 925/1995 as well as for mounting/erection of equipment, plants and industrial technological equipment in accordance with O.G. (Government Order) no. 95/1999.

ISPH currently cooperates with engineering companies, designing-research institutes specialized in various fields of activity, such as:

INCERC and INMH (National Institute of Meteorology and Hydrology) in order to get some support studies required by the drawing up process of projects.

Presently, ISPH SA has certified quality management, environment, health and safety systems keeping them operating and developing them in accordance with the requirements of international standards ISO 9001:2008, ISO 14001:2004, OHSAS 18001:2007 (adopted as Romanian standards SREN ISO 9001:2008, SREN ISO 14001:2005, SROHSAS 18001:2008).

Also, in ISPH SA, the Information Security Management System is implemented and certified for electronic archiving activities in accordance with the requirements of ISO 27001:2005.

Sustainable development

A legacy of responsability, dedication and foresight.

We have been in the bussines for a long time. More than enough to realise that for a sustainable future we must build the right present. So, how do we make a lasting difference? First of all, by developing sustainable solutions that should allow current and future generations to benefit from the same unaltered environment. Also, we make sure that a good dose of ethical behaviour, good citizenship and safety permeate every aspect of our vision and business strategy.

While we are actively advising our custmers on matters related to pollution and sustainable solutions,we also take action in order to reduce our own carbon footprint, thus demonstrating our commitment to mitigate climate change from our activities. Specifically, we have put in place measures to reduce emissions by becoming more energy efficient and energy aware in our activities and by instigating waste minimisation and recycling initiatives. We have also limited unnecessary business travel and where appropriate, we have moved to using more environmentally efficient forms of transport.

Hydropower

Being under pressure is exactly what makes the world spin.

Our major experience in hydropower projects is shown, among others, by the sheer numbers of the projects we've been involved in.

Over the past 60 years we have carefully planned and designed more than 150 dams and 150 hydropower plants. As a result of this vast praxis, we can provide an entire scope of consulting services, ranging from the first survey to commissioning and initial operation, maintenance and project management.

Whatever your project requirements, whatever your position on the world market, we will integrate different challenges, cultures, languages and climates. Our goal is to fully understand you, and propose hydropower projects that involve the best possible economic, social, environmental and technical solution.

Regardless of a project’s requirements or its position on the world market, we will tackle as best as we can the various challenges, different cultures and languages or harsh climates that may arise.

Pumped storage

Energy. When you need it, as much as you need.

Pumped storage projects involve the production of peak energy at specific times, through the conversion of base unsolicited energy coming from renewable energy sources (wind, solar, etc.) or base energy from thermal plants (nuclear). ISPH offers advanced expertise for your pumped storage project. We can design sophisticated hydraulic circuits and also recommend the best electro-mechanical equipment combining pump and turbines in a single machinery, to be operated in highly variable transient conditions (head, speed, pressure, etc.).

ISPH can provide the clients with answers to a wide range of exceptional project conditions (geology, topography, hydraulics, heads, transient pressures, etc.).

Moreover, our engineers can handle the most diverse working conditions (highly variable heads, variable speeds, high transient pressures, high requirements in terms of performance, etc.).

  • Services offered:
  • Project Identification and conceptual design (reconnaissance, pre-feasibility/feasibility studies)
  • Preparation of the pre-qualification and tender documents
  • Bid evaluation
  • Contract management
  • Construction supervision/progress monitoring
  • Owner's or Lender's Engineer
  • Technical assistance
  • Sustainable Development
Large hydropower

If there’s a lot of water in one place, then there’s a lot of light in another.

ISPH is a main actor in the design and the construction of a wide variety of large hydropower projects all over Romania’s basins (46% of the technically developable hydropower potential of the rivers in Romania is turned into account), under all kinds of physical, socioeconomic, political and contractual conditions and arrangements. This experience provides a sound basis for the development of a tailored solution (adapted to all local physical conditions) that will match your specific project.

ISPH will find the best site and layout. We will select the primary technical options with the strongest economic performance, the most limited environmental impact and the most controlled construction risks, within the best possible contractual agreement.

 

  • Services offered:
  • Project Identification and conceptual design (reconnaissance, pre-feasibility/feasibility studies)
  • Basic design
  • Loan Application Reports
  • Preparation of the pre-qualification & tender documents
  • Contract management
  • Detailed design
  • Erection documentation
  • Construction supervision/progress monitoring
  • Cost control
  • Quality Control/Assurance
  • Temporary and Final Acceptance
  • Commissioning
  • Modification/Refurbishment/Lifetime extension
  • Operation Support Solutions
  • Owner's or Lender's Engineer
  • Technical assistance
  • Sustainable Development
Small hydropower

Even a small river can keep people out of the dark.

ISPH has major experience in designing small hydropower projects, using optimum solutions. We will tailor for any client an original solution or select a pre-engineered one that is best adapted to the local physical conditions, taking into account its timing and economical constraints.

  • Services offered:
  • Project Identification and conceptual design (reconnaissance, pre-feasibility/feasibility studies)
  • Basic design
  • Loan Application Reports
  • Preparation of the pre-qualification & tender documents
  • Contract management
  • Detailed design
  • Erection documentation
  • Construction supervision/progress monitoring
  • Cost control
  • Quality Control/Assurance
  • Temporary and Final Acceptance
  • Commissioning
  • Modification/Refurbishment/Lifetime extension
  • Operation Support Solutions
  • Owner's or Lender's Engineer
  • Technical assistance
  • Sustainable Development
Substation

Taming a collossal energy requires plenty of patience.

ISPH can assist you in meeting the challenges of increasing loads and the increased requirements for metering, control, and monitoring. We offer a wide range of substation and transmission facility design services, from 1 kV to 400 kV.

Our staff has nationwide experience with substation and switchyard design for transmission and distribution systems. We can assist you through the entire design process, from initial system and facility review and planning, to detailed engineering, construction, and final commissioning.

  • Services offered:
  • Project Identification and conceptual design (reconnaissance, pre-feasibility/feasibility studies)
  • Basic design
  • Loan Application Reports
  • Preparation of the pre-qualification & tender documents
  • Contract management
  • Detailed design
  • Erection documentation
  • Construction supervision/progress monitoring
  • Cost control
  • Quality Control/Assurance
  • Temporary and Final Acceptance
  • Commissioning
  • Modification/Refurbishment/Lifetime extension
  • Operation Support Solutions
  • Owner's or Lender's Engineer
  • Technical assistance
  • Sustainable Development
Water infrastructure

KEEPING THE WATER FLOWING IS DEFINITELY SOMETHING TO KEEP IN MIND.

Increasing supply through new water resources infrastructure has a number of options: additional storage, often behind newly constructed or enlarged dams, groundwater development, pumping stations, transfer pipelines and diversions.

Having many specialists in the fields of reservoirs& dams, river engineering and water transfer, ISPH has thorough experience in performing safety revision studies and risk analysis for water infrastructure. Among others, our dam safety services include:

  • Safety services:
  • Dam safety evaluation
  • Risk analyses of potential dam Failure and dam failure Investigationsz
  • Emergency action planning
  • Flood inundation studies and Emergency action plans
  • Development of dam safety Monitoring programs (hardware And software)
  • Development of inundation maps And input for emergency action And safety plans
  • Dam safety inspection and Training
  • Tunnel and cavern inspection
  • Inspection and monitoring During dam lifespan
  • Failure mode effects and Criticality analysis
Reservoirs & Dams

Where power is measured in cubic meters.

Ever since the development of some of the earliest Romanian hydroelectric dams, some 60 years ago, ISPH has established a strong reputation, both national and international. We have designed and seen through the construction of reservoirs and dams under all kinds of physical, socio-economic, political and contractual conditions, environments and arrangements.

For every project we select the best site and layout, as well as the primary technical options with the strongest economic performance. We also seek to enable the most limited environmental impact and the most controlled construction risks, within the best possible contractual agreement.

 

 

  • Services offered:
  • Project Identification and conceptual design (reconnaissance, pre-feasibility/feasibility studies)
  • Basic design
  • Loan Application Reports
  • Preparation of the pre-qualification & tender documents
  • Contract management
  • Detailed design
  • Erection documentation
  • Construction supervision/progress monitoring
  • Cost control
  • Quality Control/Assurance
  • Temporary and Final Acceptance
  • Commissioning
  • Modification/Refurbishment/Lifetime extension
  • Operation Support Solutions
  • Owner's or Lender's Engineer
  • Technical assistance
  • Sustainable Development
River engineering

There is more to the stream than meets the eye.

We have acquired an in-depth understanding of river engineering, including hydraulic, geomorphological, and ecological, treating river channels sympathetically and balancing the forces in operation. This experience allows us to select the most appropriate modern river engineering techniques and deliver outstanding schemes. Our engineering work encompasses in-channel structures, gates and weirs, hard and soft bank protection and realignment.

ISPH has performed a large number of missions to assist in the designing and construction of suitable flood-protection works. Most water-resources projects built throughout the world have a flood-protection component.

 

  • Services offered:
  • Project Identification and conceptual design (reconnaissance, pre-feasibility/feasibility studies)
  • Basic design
  • Loan Application Reports
  • Preparation of the pre-qualification & tender documents
  • Contract management
  • Detailed design
  • Erection documentation
  • Construction supervision/progress monitoring
  • Cost control
  • Quality Control/Assurance
  • Temporary and Final Acceptance
  • Commissioning
  • Modification/Refurbishment/Lifetime extension
  • Operation Support Solutions
  • Owner's or Lender's Engineer
  • Technical assistance
  • Sustainable Development
Water transfer

Moving mountains. Of water.

Water transfer is a matter of actually moving tons of water from one place to another. Therefore, balancing the excess and the deficit from certain areas is a key aspect of this activity. By tackling this type of project for a long time, we have acquired a consistent experience in the design and construction of such water transfer developments.

Considering all physical data, we can develop for our customer brilliant solutions that are easy to implement and can achieve the expected financial optimisations while at the same time minimising the project’s impact on the environment.

 

 

 

 

  • Services offered:
  • Project Identification and conceptual design (reconnaissance, pre-feasibility/feasibility studies)
  • Basic design
  • Loan Application Reports
  • Preparation of the pre-qualification & tender documents
  • Contract management
  • Detailed design
  • Erection documentation
  • Construction supervision/progress monitoring
  • Cost control
  • Quality Control/Assurance
  • Temporary and Final Acceptance
  • Commissioning
  • Modification/Refurbishment/Lifetime extension
  • Operation Support Solutions
  • Owner's or Lender's Engineer
  • Technical assistance
  • Sustainable Development
Environment

If nature is a silent partner, someone has to speak on its behalf.

As legislation becomes more and more stringent, and related techniques are more and more advanced, the expertise of our specialised teams will prove an added-value for your project.

Based on a multidisciplinary team approach, ISPH can help you take on a large array of environmental challenges, all the while minimising their budgetary impact.

Health, safety & environmental

In other words, keeping danger at bay.

Today’s businesses need to monitor and control the Health, Safety and Environmental (HSE) impacts. These include soil, water and air quality, emissions, occupational hygiene, workplace and safety management.

ISPH assists our clients in monitoring the Health, Safety and Environmental impacts of their operations.

Our services ranging from measurements, analysis, diagnosis and audits to technical recommendations and consultancy, all aiming to improve global HSE performance:

  • Safety and environmental audits
  • On-site safety management
  • Environmental Impact Assessment & Permitting
  • Policy Studies
  • Technical assistance
Waste management

Nothing gets left behind.

The ISPH Waste Strategy, Procurement and Design team is extremely versatile in providing balanced and straightforward advice to a diverse client base that includes both the public and private sector. We carefully assist local authorities and waste management contractors and help them plan all the aspects of their municipal waste management strategy.

  • The ISPH waste recovery and recycling expertise includes:
  • Studies for storage sites (volume and cost optimisation, environmental impact analysis/studies for protective measures, allowing assistance)
  • Studies for the exploitation of storage sites (financial investment and operation plans assessment, optimisation of catch water and leachate management, recuperation and capitalisation of the gas produced)
  • Closing and covering of end-of-life storage sites
  • The ISPH team acts as a technical advisor on:
  • Contract procurement support for both the Public and Private sector
  • Procurement of waste collection, recycling facilities and residual waste technologies
  • Facility design forms an integral part of the procurement services that our team provides (we seek to maintain a close relationship with the customer and we continually look for the optimum economic, technical, environmental and legal solution).
  • Services offered:
  • Project Identification and conceptual design
  • Basic design
  • Loan Application Reports
  • Contract management
  • Detailed design
  • Construction supervision/progress monitoring
  • Engineering Procurement Construction Management
  • Owner's or Lender's Engineer
  • Technical assistance
  • Sustainable Development
Sewerage & Drainage Systems

Inside every water there's a good water.

The ISPH Waste Strategy, Procurement and Design team is extremely versatile in providing balanced and straightforward advice to a diverse client base that includes both the public and private sector. We carefully assist local authorities and waste management contractors and help them plan all the aspects of their municipal waste management strategy.

The understanding of the regulations that drive the worldwide water and wastewater industry makes it easier for us to provide the best solutions for protecting, enhancing, storing and distributing water. Consequently, our expertise also includes the highest level of competence in dam design and rehabilitation.

  • Services offered:
  • Project Identification and conceptual design (reconnaissance, pre-feasibility/feasibility studies)
  • Basic design
  • Loan Application Reports
  • Contract management
  • Detailed design
  • Construction supervision/progress monitoring
  • Engineering Procurement Construction Management
  • Owner's or Lender's Engineer
  • Technical assistance
  • Sustainable Development
Consultancy

Good advice is not hard to find, suppose someone dives deep enough.

Through our consultancy services, we provide our customers with an overview of their infrastructure project.Whether it is about assesing the environmental impact of the project, increasing its energy efficiency or a constant research and development policy, we will be a reliable team player that will help optimize, regulate or straighten the client’s project.

Environmental impact

The bigger the social footprint, the smaller the environmental one.

Before a project can be safely implemented, it is paramount to asses both the economical and environmental impact. We carefully examine a project’s plans and develop an ex-ante impact evaluation. Our extensive know-how allows us to perform diverse and often elaborate environmental studies:

  • Risk analysis and environmental impact study
  • Sustainability check
  • Regulatory impact assessment

Our customers can also widely choose in-between various tools and methods for comparing the impact of different alternatives they might pick.

Energy efficency

You keep what we save.

Our consultancy services are designed to help companies perform their activities in a more energy efficient way, without infringing their employees comfort or safety. Next to common sense, practical measures (eg. insulation), we propose a wide variety of solutions that help customers fundamentally (re)organize their activities in the most appropriate, energy-efficient way. We provide this kind of services throughout their projects, from conceptual design to implementation.

Research applied studies

We know your projects like the back of your hand.

Our active research and development policy represents a key strategic choice aimed at providing clients with coherent projects by using the very latest know-how in earth, engineering and social sciences.

Preventive monitoring of water-resources infrastructures. Development of a general method for inspection and monitoring of operating water-resources infrastructures, detection of abnormal behaviour, and safety diagnosis. (since the 80’s ISPH has been using a statistical method for separation of hydrostatic, seasonal, and irreversible time-related effects - a method originally designed by Electricité de France - initially in discrete form, then in specialized in house developed software).

Field & Laboratory investigations. Geological, geotechnical, hydrogeological and hydrological studies, topographic and geodetical surveys, tests on hydraulic models, quality studies of concrete and construction materials, hydraulic measurements for works in operation, environmental studies, GIS applications.

Technical and manufacturing design projects for hydro developments.

Hydraulic calculations and studies: calculation of levels under permanent and non-permanent flow conditions; flooding studies; floods by-passing through reservoirs. Statistic calculation for establishing water discharges and sediment discharges.

Forecasts: forecasting of discharges, silting, erosions and water levels.

Studies for inventory of hydropower resources.

Establishment of the optimum main power parameters of power stations and works within developments.

Studies for hydropower resources development.

Studies regarding the economic efficiency of power stations.

Studies for including power station outputs into national grids

Case studies

Case studies

Through our consultancy services, we provide our customers with an overview of their infrastructure project. Whether it is about assesing the environmental impact of the project, increasing its energy efficiency or a constant research and development policy, we will be a reliable team player that will help optimize, regulate or straighten the client’s project.

Portile de fier I dam

Portile de fier I dam

The Portile de Fier dam is part of one of the biggest Hydroelectric and Navigation Systems from Romania, system which accounts for a quarter of the power and the electric power output that can be developed on the entire river.

Along the Romanian - Serbian sector the Danube boasted an exceptional hydropower potential, the largest in Europe which reaches an average of 82 000 KW/km. The total potential calculated for the whole joint section was of 15.8 GWh in the average year out of which 12.6 GWh/year, representing 80%, was obtained upstream from the Gura Vaii-Sip profile. The Danube had a water head of 34 m out of which 28 m were concentrated in the Iron Gates gorges.
Taking into account the huge hydropower potential and the sailing difficulties, the Government of Romania and that of ex-Yougoslavia agreed to jointly build a HPP. Based on the studies, the specialists proposed development and utilization of the joint sector through two hydropower and navigation systems, one located at km 942+950 in profile Gura Vaii-Sip and one at km 863 in profile Ostrovul Mare-Prahovo. The agreement between Romania and Yougoslavia for the first location was signed in Belgrad on November 30, 1963.

The development took place on the Danube river, near the town of Drobeta Turnu-Severin, and was built between 1966 and 1971. The main purposes included hydroelectricity, navigation, improvement of the Danube course, industrial water supply, fish farming and recreation.

General

The system consists of the following main objectives: common gravity gated dam (Romanian and Serbian, former Yugoslav), two power stations, two locks, two non-overflowing side dams. The dam is divided into blocks of 16 m wide separated by joints arranged in weir body and sealed upstream and downstream by two rows of rubber bands.

The high water discharging is made over the spillway dam with a forebay elevation of 63 mASL. The power stations provide the discharging of a maximum flow of 8700 m³/s and are of power station-dam type having a constructive height of 74.70 m, being among the largest power stations buil in Europe.

Main technical data

Development

River: Danube – km D942+950
Area of catchment: 577 ,250 km²
Construction period: 1966 – 1971
Purpose: hydroelectricity (gross head: 34.50 m; installed power: 2x1050 MW; average energy output: 2x5250 GWh/year)

Dam - reservoir

Maximum height of dam above foundation: 60.60 m
Crest length: 1278 m
Crest width: 32.90 m
Base maximum width: 79.85 m
Reservoir area: 104,410,000 m²

Surveillance

For supervising the dam under the operating, at the leve of galleries from ellevations 21.00 mASL, 24.00 mASL, 38.00 mASL and 49.00 m ASL and especially behind the sealing of the upstream face, there were shafts of 1.50x0.80 m for the control and rehabilitation of sealing in case of damage. At the same time, the grouting curtain and draining network can be checked and rehabilitated at the level of galleries in dam foundation.

Gura apelor dam

Gura apelor dam

Gura Apelor dam is one of the biggest dams of its type in Europe. This rockfill dam with a clay core ranks the 5th in Europe from the height point of view, and the 9th throughout the world in the class of the rockfill dams with clay core.

The dam erection started in 1975, and while the dam is fully functional there are still some developments underway in the present day.

The geology of the location identifies three blocks:
- the granite of Varful Pietrei in the upper third part of the left slope as an eruptive body.
- phyllite - quatz biolotic shysts, bulky, in the lower third part of the left slope, in the water bed and on the right slope.
- the Rausor formation, with a schyst aspect, fractured, altered and affected by ruptures in the middle third of the left slope which lost the characteristics of a "rocky stone".

The rocks in the water bed and in the right slope are almost waterproof. On the left slope there is an exaggerated permeability which imposed the lake operation by restricting the storage level, studies and research for a waterproofing and an intense grouting program.

The dam has a width at the base of 556 m and at the crown of 12 m. The safeguard towards NWL is of 6 m, namely the crown level at 1078,50. The high waters discharge is a lateral surface spillway on the right bank, having a sill of 70 m at the level of 1072.50 m, a draining canal which crosses a rocky massive through a gallery having a diameter of 11 m after which it follows a projecting platform.

General

After deciding that instead of a concrete arch dam one made out of local materials is a better option, the construction of Gura Apelor dam went on without any major changes, except for the way of approaching the performance of the grout curtain on the left bank. As the initial design did not manage to reduce the water absorptions, iti is now taken into consideration a more performant technology, such as Jet Grouting or an ICOS wall type.

Main technical data

Development

River: Raul Mare
Area of catchment: 235 km²
Main purpose: Hydroelectricity (gross head: 582.5 m; installed power: 349 MW; average energy output under final situation: 582.5 GWh/year; average energy output under actual stage of performing: 324.9 GWh/year)

Dam - reservoir

Maximum height of dam above foundation: 168 m
Crest length: 464 m
Crest width: 12 m
Base maximum width: 574 m

Surveillance

Gura Apelor dam reached the final elevation of fills during 1998. This dam behaved according to loads in dead weight and hydrostatic pressure.

Vidraru dam

Vidraru dam

The Vidraru dam is a 166 m high arch dam, built this way due to the favourable geology and the morphological conditions. It is an arch dam with a double curvature having horizontal arches, arches with two centres and of variable thickness, with circular downstream and upstream faces.

The dam is equipped with surface spillways (3 fields of 9 m) and two bottom outlets, one with a diameter of 4.20 m (quipped with two plane valves) and another one with a diameter of 5.20 m (equipped with a plane valve at the upstream end, a Johnson valve and a by-pass pipeline with an outlet valve of the gallery at the downstream end). A tightening veil was performed in the dam foundation by means of groutings on two rows with a drilling depth of 10 m and drains drilled from the galleries.

At the date of this development, from the point of view of its characteristics, the Vidraru dam ranked 5th in Europe and 9th in the whole world. Today it ranks 27th in the world.

General

The Arges hydroelectric station is developed on Arges river stretch, being comprised of a concrete arch dam, a a headrace gallery under pressure, from the dam to the powerstation (2.13 km long), a surge tank, an underground power station, a free overflow tailrace gallery of 11.13 km long and a system of secondary intakes for the diversion of some additional discharges in the Vidraru reservoir.

Main technical data

Development

River: Arges
Complex development: Arges Hydropower Development
Area of catchment: 286 km²
Construction period: 1960 - 1965
Main purposes:
- hydroelectricity (gross head: 324 m; installed power: 220 MW; average energy output: 400 GWh/year)
- irrigation of 100,000 ha;
water supply of Bucharest city

Dam - reservoir

Maximum height of dam above foundation: 166 m
Crest lenght: 305 m
Crest width: 6 m
Base maximum width: 25 m
Works quantity excavation: 147,500 m³
Volume of dam body: 470,000 m³
Reservoir capacity: (at NRL): 469,000,000 m³
Reservoir area (at NRL): 10,000,000 m²
Normal Retention Level: 830 mASL
Minimum operating level: 778 mASL

Surveillance

The Vidraru dam behaved very well under operating procedures. The major earthquakes from 1977, 1986 and 1990 had no impact on the structure.