NATIONAL REGISTER OF LARGE DAMS – 2009 FOREWORD PREFACE ABSTRACT DAMS OF NATIONAL IMPORTANCE ( COMPLETED AND ONGOING) STATE-WISE DISTRIBUTION OF LARGE DAMS:- Height 10 to 15 metres. Height more than 15 metres. Height more than 15 metres or storage more than 60 m cubic metre Height more than 50 metres. State-wise distribution of large dams (existing & ongoing) in India - Column graph Decade-wise distribution of large dams - Column graph State-wise distribution of completed large dams in India – Pie diagram State-wise distribution of ongoing large dams in India – Pie diagram STATE-WISE DETAILS OF LARGE DAMS : - Andaman & Nicobar Islands Andhra Pradesh Arunachal Pradesh Assam Bihar Chhattisgarh Goa Gujarat Himachal Pradesh Jammu & Kashmir Jharkhand Karnataka Kerala Maharashtra Madhya Pradesh Manipur Meghalaya Orissa Punjab Rajasthan Sikkim Tamil Nadu Tripura Uttrakhand Uttar Pradesh West Bengal FOREWORD With the ever increasing population and the consequent increasing demand for water for various uses, it has become necessary not only to construct new dams but also rehabilitate and maintain existing ones. The dams provide storages to tide over the temporal and spatial variation in rainfall for meeting the year round requirements of drinking water supply, irrigation, hydropower and industries in the country which lead to development of the national economy. Dams have helped immensely in attaining self sufficiency in foodgrain production besides flood control and drought mitigation. The maintenance of these dams in good health is a serious matter, as failure of any dam would result in huge loss of life and property. Thus safety of dams and allied structures is an important issue that needs to be continuously monitored for ensuring public confidence, protection of downstream areas from potential hazard and ensuring continued accrual of benefits from the large national investments. Having a proper data base that can provide, at a glance, information about existing as well as dams under construction would greatly help in this direction. It has therefore been found necessary to catalogue all the major dams in the country. The Dam Safety Organisation (DSO), CWC took up the task and brought out a publication entitled “National Register of Large Dams (NRLD)” in April 1990 with the data of about 3600 large dams in the country documented therein. Keeping in view the usefulness of the data made available in this publication, it was last updated by documenting data of 4525 large dams of the country in 2002. Correctness of the data of all large dams is important considering the safety aspect of the dams. Therefore, periodical updating of the data of dams is necessary to make it a valuable and reliable document. DSO of CWC has made another successful attempt to collect necessary information from the State Governments/ Organisations and update the NRLD. The updated NRLD is now being made available to all stakeholders through CWC website, which will also facilitate its future updating at closer intervals. Present update is for the period upto 31st January, 2009, with information about 5100 large dams. The updated compilation of NRLD is expected to prove useful to all engineers, planners and policy makers of the water resources sector. This compilation has been possible due to the dedicated efforts put in by the officers and staff of the Dam Safety Organisation of CWC with excellent co-operation from the Dam Safety Organisations of the States and other dam owning organisations who have supplied valuable information. February, 2009 (A. K. Bajaj) New Delhi Member (D&R) PREFACE India ranks third in the world after China, USA and Russia in terms of number of dams. The country has about 4710 completed large dams. These dams play a very important role in the water resources development of the nation and many more such dams are required to be constructed for fully exploiting the available surface water potential of this country. In India most of the dams are constructed and maintained by the State Governments while there are a few other organizations, namely, Bhakra Beas Management Board (BBMB), Damodar Valley Corporation (DVC) and National Hydro Electric Power Corporation (NHPC) who also now own and operate dams. Some private agencies are also coming up who will own and operate such dams. As per the latest information compiled, there are about 4710 completed large dams and another 390 are under construction. India has adopted the definition of large dams as per the norms of International Commission on Large Dams (ICOLD), which classifies a large dam as one with a maximum height of more than 15 metres from its deepest foundation to the crest. A dam between 10 and 15 metres in height from its deepest foundation is also included in the classification of a large dam provided it complies with one of the following conditions : (a) length of crest of the dam is not less than 500 metres or (b) capacity of the reservoir formed by the dam is not less than one million cubic metres or (c) the maximum flood discharge dealt with by the dam is not less than 2000 cubic metres per second or (d) the dam has specially difficult foundation problems, or (e) the dam is of unusual design. Construction of a dam involves many considerations including a large number of potential benefits to be derived from them. But it also creates a structure with potential hazards, which may result from its failure. The safe design of a dam is a major consideration in constructing a new dam or rehabilitating an existing one. A safe dam is one, which performs its intended functions without imposing unacceptable risks to the public and society by its presence. Dam safety is considered an inherent function in the planning, design, construction, maintenance and operation of dams. It has been recognized world-wide that dam safety aspects, particularly of the existing dams, are not receiving adequate attention even as the number of old/existing dams are aging. Most of these dams were constructed using the standards and criteria prevalent at that time and may either not be safe under today’s technology and know-how or may not be acceptable to the present society which has become more aware of its rights and needs of absolute safety in terms of life and property. It has also been generally recognized within the international dam safety community that a successful dam safety assurance programme requires a dedicated institutional structure with access to attention of top management. In recognition of the need for a nation-wide initiative, Dam Safety Organisation (DSO) was established in the Central Water Commission (CWC) in May, 1979. Subsequently, CWC helped in setting up independent Dam Safety Organisations in most of the States in the country. A National Committee on Dam Safety (NCDS) with membership of all the States and organizations having significant number of large dams was set up during 1987 under the Chairmanship of Chairman, CWC with CE (DSO) as Member Secretary to guide and oversee the activities of State Dam Safety Organisations (SDSO). Dam Safety Monitoring Directorate (DSM) under DSO, CWC serves as the Secretariat for the NCDS. DSO, CWC collected and compiled salient features including information on storage capacity of the reservoir, spillway capacities which are essential data for a meaningful inspection of large dams and brought out its first publication titled “National Register of Large Dams” in April, 1990. This publication contained data upto December, 1989 of 3634 dams. Thereafter an updated version was published in December, 1994 which contained data of 4291 dams. Subsequently, a data base for all the large dams in India has been developed on computer in DSM Dte under Dam Safety Organisation of CWC. This data was continuously updated as and when information was received from the States and other agencies and the same was also got vetted from time to time from the States/Organisations concerned. Lastly, updated version was published in July, 2002 containing data for 4525 dams spread over 28 States and 1 Union Territory including 70 dams of National Importance. Now data for 5100 dams spread over 28 States and 1 Union Territory including 181 dams of National Importance have been compiled upto January, 2009 and brought out in this publication with major additions, alterations/corrections and updating of information. This information has been compiled as obtained from State Governments & other agencies and shall be updated as and when further information received. Compilation of the National Register of Large Dams is a result of untiring efforts and hard works put in by S/Shri N. K. Roy, Director, N. K. Manglik & V. K. Hejib Dy.Directors, Prakash Chand, Extra Asstt. Director, P.K.Guru, P.S. & Man Singh, D’man Gr.I of DSM Dte of DSO, CWC with the assistance from Dam Safety Cells/Organisations of the State Governments who have provided the information. Every staff member of DSM Dte of DSO, CWC deserves credit for the efforts put in for publishing this valuable document. CWC wishes to acknowledge the contribution made by all concerned and hopes that the Register will be a source of valuable information for those who would be referring it. New Delhi (S. K. Sengupta) February,2009 Chief Engineer (DSO) Central Water Commission NATIONAL REGISTER OF LARGE DAMS Information compiled upto 31st January, 2009 STATE - WISE DISTRIBUTION OF LARGE DAMS ABSTRACT Sl. State Year of completion No. UPTO 1901 1951 1961 1971 1981 1991 2001 Year of Total Under TOTAL 1900 TO TO TO TO TO TO & construction