Lok Sabha Question No. 2675 (UNSTARRED), answered on 2018-12-27
Subject: Removal of Silt from Dams
Ministry: WATER RESOURCES, RIVER DEVELOPMENT AND GANAGA REJUVENATION
Asked by: HARISH DWIVEDI

## GOVERNMENT OF INDIA MINISTRY OF WATER RESOURCES, RIVER DEVELOPMENT & GANGA REJUVENATION

## LOK SABHA UN STARRED QUESTION NO. †2675

ANSWERED ON 27.12 .201 8

## REMOVAL OF SILT FROM DAMS

## †2675. SHRI HARISH CHANDRA ALIAS HARISH DWIVEDI

Will the Minister of WATER RESOURCES, RIVER DEVELOPMENT AND GANGA REJUVENATION be pleased to state:

(a) the total number of dams in the country, State -wise;

(b) whether dams get damaged due to deposition of silt and if so, the details thereof;

(c) the funds spent on removing silt from dams and on their maintenance during each of th years and the current year, State - wise; and

(d) the names of the dams that broke during the said period?

## ANSWER

## THE MINISTER OF STATE FOR WATER RESOURCES, RIVER DEVELOPMENT AND GANGA REJUVENATION & PARLIAMENTARY AFFAIRS ( SHRI ARJUN RAM MEGHW AL )

(a)  Central Water Commission (CWC) maintains National Register of Large Dams (NRLD) as information provided by State Govts/ Dam owners. As per NRLD, there are 5701 large dams (5264 completed an d 437 under construction). The S tate -wise details of large dams is at Annexure - I .

(b) Silt accumulation in the reservoirs is a natural process. While designing a storage pr provision for Dead Storage is kept to accommodate the silt coming from upstream catchment. The dead s so kept as to accommodate the silt for100 years of project life assuming a certain design r which is based on certain factors. An y deposition of silt in the dead storage zone does not aff performance  of  the  reservoir.  Dam's  storage  capacity  gets  reduced  if  rate  of  siltation  is  more  than assumed/expected rate of siltation.

(c)    Desiltation  and  maintenance  of  dams  is  primarily the  responsibility  of  dam  owners  who  are generally State Government or Central/State PSUs. However, desiltation work has been tak limited  scale  by  some  of  the  dam  owners.  Under  World  Bank  assisted  Dam  Rehabilitatio Improvement Project (DRIP), there is need - based provision of desiltation of dams. De - siltation works of two dams viz.  Kundahapalam dam and Papanasam Weir in Tamil Nadu at a cost of Rs. 18.18 and  Rs.  13.25  Crores  respectively  have  been  awarded  in  the  year  2017.  Desiltation  of one  dam  of Uttarakhand Jal Vidyut Nigam Limited (UJVNL) viz. Asan Barrage at a cost of Rs. 1.83 Cro been carried out in 2017 -18.

(d)   No dam failure is reported by State Governments / dam owners during the last three ye

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## Statement referred to in reply to  part (a)  of Unstarred Question No. 2675 to be answere Lok Sabha on 27.12.2018 regarding  Removal of Silt from Dams.

## Statewise detail of large dams

| S.No.       | States/ UT                | Completed dams   | Dams Under Construction   |
|-------------|---------------------------|------------------|---------------------------|
| 1           | Andaman & Nicobar Islands | 2                | -                         |
| 2           | Andhra Pradesh            | 142              | 25                        |
| 3           | Arunachal Pradesh         | 1                | 3                         |
| 4           | Assam                     | 3                | 1                         |
| 5           | Bihar                     | 24               | 2                         |
| 6           | Chhattisgarh              | 248              | 10                        |
| 7           | Goa                       | 5                | -                         |
| 8           | Gujarat                   | 620              | 12                        |
| 9           | Himachal Pradesh          | 19               | 1                         |
| 10          | Haryana                   | 1                | -                         |
| 11          | Jammu & Kashmir           | 14               | 3                         |
| 12          | Jharkhand                 | 50               | 29                        |
| 13          | Karnataka                 | 230              | 1                         |
| 14          | Kerala                    | 61               | 1                         |
| 15          | Madhya Pradesh            | 899              | 7                         |
| 16          | Maharashtra               | 2069             | 285                       |
| 17          | Manipur                   | 3                | 1                         |
| 18          | Meghalaya                 | 8                | -                         |
| 19          | Mizoram                   | -                | 1                         |
| 20          | Nagaland                  | 1                | -                         |
| 21          | Odisha                    | 199              | 5                         |
| 22          | Punjab                    | 14               | 2                         |
| 23          | Rajasthan                 | 209              | 2                         |
| 24          | Sikkim                    | 2                | -                         |
| 25          | Tamil Nadu                | 116              | -                         |
| 26          | Telangana                 | 163              | 21                        |
| 27          | Tripura                   | 1                | -                         |
| 28          | Uttar Pradesh             | 115              | 15                        |
| 29          | Uttarakhand               | 16               | 9                         |
| 30          | West Bengal               | 29               | 1                         |
| GRAND TOTAL |                           | 5264             | 437                       |