National Dam Safety Authority Regulation, 2023

Sl. No.

Title

Details

(1)

(2)

(3)

1.

Name of Dam

2.

State

3.

District

4.

Nearest Rail Head

5.

Nearest airport

6.

Dam owner

7.

Name of river on which dam is constructed

8.

Basin

9.

Location

(i) latitude

(ii) longitude

10.

Nearest City

11.

Dam type

12.

Year of completion

13.

Dam purpose

14.

Earthquake zone as per IS 1893

15.

Height of the dam (metres)

(i) above deepest foundation

(ii) above deepest river bed elevation

16.

Storage Capacity (million cubic metres)

(i) gross storage

(ii) livestorage

17.

Total length of dam (metres)

18.

Total length and number of overflow blocks

19.

Total length and number of non-overflow blocks

20.

Top width of dam (metres)

21.

Reservoir Surface Area (at full reservoir level) (in square kilometres)

22.

Reservoir Surface Area (at maximum water level) (in square kilometres)

23.

Catchment Area (in square kilometres)

24.

Spillway type

25.

Spillway gates

(i) sluice gate type, number and size (width and height)

(ii) surface crested gate type, number and size (width and height)

26.

Total spillway capacity (cubic metres per second)

27.

Design flood adopted (Probable Maximum Flood or Standard Project Flood or any other (cubic metres per second)

28.

Type of energy dissipater

29.

Stilling Basin

(i) floor elevation of stilling basin

(ii) length

(iii) width

30.

Bucket type

(i) invert elevation

(ii) lip angle and elevation

(iii) radius

31.

Plunge Pool

(i) bottom elevation

(ii) length and width

32.

Important Controlling Elevation (metres)

(a)

top bund elevation

(b)

maximum water level

(c)

full reservoir level

(d)

Spillway Crest elevation

(i)     sluice type

(ii)     overflow type

(e)

Minimum Draw Down Level

(f)

Lowest river bed elevation

(g)

Deepest foundation elevation

(h)

Top of upstream parapet solid parapet wall reduced level

(i)

Maximum Tail Water Elevation

(j)

Minimum Tail Water Elevation

(k)

Average Tail Water Elevation

33.

Earthen or Rockfill or Masonry or Concrete Dam

(a)

type

(b)

upstream slope

(c)

downstream slope

(d)

number of berms, width and elevations

(e)

Core

(i)     top elevation

(ii)     upstream slope

(iii)      downstream slope

(f)

Cutoff

(i)      type

(ii)       maximum depth

34.

Power generation (if applicable)

(a)

Head Race Tunnel Intake structure

(i)      number of intake and type

(ii)       size (metres) and shape

(iii)       design discharge per unit (cubic metres per second)

(iv)       invert elevation

(v)       design head (metres)

(b)

Head Race Tunnel

(i)      number

(ii)       size (metres) and shape

(iii)       design discharge for each (cubic metres per second)

(c)

Surge Shaft

(i)       number and type

(ii)        size (metres) and shape

(iii)        top elevation

(iv)        bottom elevation

(v)            height of surge shaft

(vi)           gate type, number and size (width and height)

(d)

Pressure shaft

(i)         number

(ii)         size (metres) and shape

(iii)         design discharge for each (cubic metres per second)

(e)

Unit Pressure Shaft or Penstock

(i)         number

(ii)         size (metres) and shape

(iii)         design discharge for each (cubic metres per second)

(f)

Powerhouse

(i)         type (underground or surface)

(ii)         installed capacity (megawatt)

(iii)         number and type of turbine

(iv)        size (width, length and height)

(v)        rated discharge (cubic metres per second)

(g)

Tail Race

(i)         number and type

(ii)         size (metres) and shape

(iii)         design discharge

(iv)        length (metres)

(v)       highest flood level at Tail Race outlet

35.

Irrigation (if applicable)

(a)

head regulator (left)

(i)         number of bays and size of gate (width, length and height)

(ii)             sill elevation

(iii)            discharging capacity

(b)

head regulator (right)

(i)              number of bays and size of gate (width, length and height)

(ii)             sill elevation

(iii)            discharging capacity

(c)

Gross Command Area (hectares)

(d)

Culturable Command Area (hectares)

(e)

Irrigation Intensity

(f)

Canal

(i)              number and size

(ii)             shape

(iii)            discharge capacity

(iv)           length

(1)

(2)

(3)

1.

Name of Barrage or Weir

2.

State

3.

Barrage owner

4.

River on which barrage is constructed

5.

Basin

6.

Location

(i)           latitude

(ii)          longitude

7.

Nearest City

8.

Year of completion

9.

Earthquake zone as per IS 1893

10.

Height of the Barrage (metres) (above deepestfoundation)

11(a)

Number of Under Sluice Bays

(i)           crest or sill elevation

(ii)          gate size (width and height)

(iii)         length

11(b)

Number of Spillway Bays

(i)           crest or sill elevation

(ii)          gate size (width and height)

(iii)      length

12.

Design discharge capacity (cubic metres per second)

13.

Design Flood adopted (Probable Maximum Flood or Standard Project Flood or any other (cubic metres per second)

14.

Energy Dissipater

(i)           length

(ii)          width

(iii)         top elevation

(iv)        top of training wall

(v)         length of downstream apron

15.

(i)           bottom elevation of upstream cut off

(ii)          bottom elevation of downstream cut off

16.

Barrage parameters

(a)

number and width of piers

(b)

number and width of double Piers

(c)

total water way (metres)

(d)

clear water way (metres)

(e)

upstream floor level

(f)

downstream floor level

(g)

pond level (metres)

(h)

highest flood level (metres)

(i)

river bed elevation (metres)

(j)

top of bridge at barrage (metres)

(k)

maximum tail water level (metres)

(l)

Afflux

(m)

Freeboard

(n)

Flare out wall

(i)           length

(ii)          top Level

(iii)         width

(o)

Flank out wall

(i)           length

(ii)          top level

(iii)         width

(p)

Upstream Guide Bund

(i)           length

(ii)          top level

(iii)         width

(q)

Afflux Bund

(i)           length

(ii)          top Level

(iii)         width

(r)

Downstream Guide Bund

(i)           length

(ii)          top Level

(iii)         width

(s)

Top of Abutments

17.

Divide Wall

(i)           upstream - length, width and elevation

(ii)          downstream - length, width and elevation

18 (a)

Head Regulator (Left)

(i) number of bays

(ii) number and width of pier

(iii) length

(iv) size of gate (width and height)

(v) s ill level

(vi) discharging capacity

(vii) top of head regulator

(b)

Canal

(i).          full supply level of canal

(ii)          discharge capacity of canal

(iii)         bed level of canal

19 (a)

Head Regulator (Right)

(i)           number of bays

(ii)          number and width of pier

(iii)         length

(iv)        size of gate (width and height)

(v)         sill level

(vi)        discharging capacity

(vii)       top of head regulator

(b)

Canal

(i)           full supply level of canal

(ii)          discharge capacity of canal

(iii)         bed level of canal

20

Protection works

(i)           length of upstream concrete block works

(ii)          length of downstream concrete blockworks

(iii)         length of upstream loose stoneprotection (apron) works

(iv)        length of downstream loose stone protection (apron) works

(v)         safe exit gradient

21

Fish Ladder Provided (Yes or NO) * If yes, provide details in separate sheet

22

Navigation Lock (Yes or NO) * If yes, provide details in separate sheet

23

Irrigation Parameters

(i)           Gross Command Area (hectares)

(ii)          Culturable Command Area (hectares)

(iii)         Irrigation Intensity

24.

Power generation (if applicable)

(a)

Head Race Tunnel Intake structure

(i)           number of intake and type

(ii)          size (metres) and shape

(iii)         design discharge per unit (cubic metres per second)

(iv)        invert elevation

(v)         design head (metres)

(b)

Head Race Tunnel

(i)           number

(ii)          size (metres) and shape

(iii)         design discharge for each (cubic metres per second)

(c)

Surge Shaft

(i)           number and type

(ii)          size (metres) and shape

(iii)         top elevation

(iv)        bottom elevation

(v)         height of surge shaft

(vi)        gate type, number and size (width and height)

(d)

Pressure Shaft

(i)           number of pressure shaft

(ii)          size (metres) and shape

(iii)         design discharge for each (cubic metres per second)

(e)

Unit Pressure Shaft or Penstock

(i)           number of pressure shaft

(ii)          size (metres) and shape

(iii)         design discharge for each (cubic metres per second)

(f)

Powerhouse

(i)           type (underground or surface)

(ii)          installed capacity (megawatt)

(iii)         number and type of turbine

(iv)        power house size (width, length and height)

(v)         rated discharge (cubic metres per second)

(g)

Tail Race

(i)           number and type

(ii)          size (metres) and shape

(iii)         design discharge

(iv)        length (metres)

(v)         highest flood level at Tail Race Tunnel outlet

Sl. No

Item

Periodicity

(1)

(2)

(3)

1.

Reservoir Water Level (metres)

On hourly basis in monsoon season. On daily basis in non-monsoon season.

2.

Reservoir Inflow (cubic metres per second)

On daily basis. In monsoon season, observation at more frequent intervals.

3.

Discharge or Outflow (cubic metres per second)

On  daily  basis.  In  monsoon  season, observation at more frequent intervals.

4.

Seepage (litre per minute)

On daily basis

5.

Leakage through body of the dam (litre per minute)

On daily basis

6.

Average Rainfall (millimetre) during the day in the catchment Area or Sub catchment Area or Dam site

On daily basis

7.

Any other relevant items

Date and time of recording

(1)

(2)

(3)

1.

Any repairs or modifications or rehabilitation or addition work being carried out.

2.

Any repairs or modifications or rehabilitation or addition work planned in future along with date or period.

Date and time of incidents or failures or unusual events

(1)

(2)

(3)

1.

any structural damage to the dam and the appurtenant structure;

2.

any unusual readings of any instrument in the dam;

3.

any unusual seepage or leakage through the dam body;

4.

any unusual change in the seepage or leakage regime;

5.

any boiling or artesian condition noticed below the dam;

6.

any sudden stoppage or unusual reduction in seepage or leakage from the foundation or body of the dam or any of its galleries;

7.

any malfunction or inappropriate operation of gates;

8.

any issue observed due to electrical fault or malfunctioning of panels or equipment;

9.

occurrence of flood, the peak of which exceeds the available flood discharge capacity of the dam or seventy per cent. of the approved design flood;

10.

occurrence of flood, which resulted in encroachment on the available freeboard, or the approved design freeboard;

11.

any unusual erosion in the near vicinity up to five hundred meters downstream of the spillway or waste-weir;

12.

Any unusual seismic event;

13.

any other relevant items.

Description or Remarks

(1)

(2)

(3)

1.

date of inspection;

2.

details of team members who inspected;

3.

observations of inspection team;

4.

remedial measures suggested by team;

5.

timelines within which the recommended work are to be completed;

6.

review of past dam rehabilitation works suggested, executed within time frame assigned mentioning the status or quality of the works;

7.

date of next inspection;

8.

any other relevant items.

Designation

Qualification

Experience during total service

Training

(1)

(2)

(3)

(4)

(5)

1.

Chief Engineer or equivalent

Graduation in Civil or Mechanical Engineering from a recognised University or Institution

Minimum three years’ experience            in                               Dam Engineering or Dam Safety aspects or Hydro-mechanical or related works.

The   topic   and domain   of   the training to be formulated by the National Dam Safety Authority.

2.

Superintending Engineer (Civil) or equivalent

Graduation in Civil Engineering from a recognised University or Institution

Minimum three years’ experience            in                               Dam Engineering or Dam Safety aspects or related works.

3.

Superintending Engineer (Mechanical) or equivalent

Graduation                     in Mechanical Engineering from a recognised University or Institution

Minimum three years’ experience in dealing with operation and maintenance of gates and Hydro-mechanical equipment or related works.

4.

Superintending Engineer (Electrical) or equivalent

Graduation in Electrical Engineering from a recognised University or Institution

Minimum three years’ experience in dealing with Electro-mechanical equipment or related works.

5.

Executive Engineer (Civil) or equivalent

Graduation or Diploma in Civil Engineering from a recognised University or Institution

Minimum three years’ experience in dealing with Dam Engineering or Dam Safety aspects or related works.

6.

Executive Engineer (Mechanical) or equivalent

Graduation or Diploma in                        Mechanical Engineering from a recognised University or Institution

Minimum three years’ experience in dealing with operation and maintenance of gates and Hydro-mechanical equipment or related works.

7.

Executive Engineer (Electrical) or equivalent

Graduation or Diploma in Electrical Engineering from a recognised University or Institution

Minimum three years’ experience in dealing with Electro-mechanical equipment or related works.

8.

Assistant Executive Engineer or Assistant Engineer (Civil) or equivalent

Graduation or Diploma in Civil Engineering from a recognised University or Institution

Minimum two years’ experience in dealing with Dam Engineering or Dam Safety aspects or related works.

The   topic   and domain   of   the training to be formulated by the National Dam Safety Authority.

9.

Assistant Executive Engineer or Assistant Engineer (Mechanical) or equivalent

Graduation or Diploma in                        Mechanical Engineering from a recognised University or Institution

Minimum two years’ experience in dealing with operation and maintenance of gates and Hydromechanical equipment or related works.

10.

Assistant Executive Engineer or Assistant Engineer (Electrical) or equivalent

Graduation or Diploma in Electrical Engineering from a recognised University or Institution

Minimum two years’ experience in dealing with Electro-mechanical equipment or related works.

11.

Junior Engineer (Civil) or equivalent

Graduation or Diploma in Civil Engineering from a recognised University or Institution

Minimum two years’ experience in dealing with Dam Engineering or Dam Safety aspects or related works.

12.

Junior Engineer (Mechanical) or equivalent

Graduation or Diploma in                        Mechanical Engineering from a recognised University or Institution

Minimum two years of experience in dealing operation and maintenance of gates and Hydro mechanical equipment or related works.

13.

Junior Engineer (Electrical) or equivalent

Graduation or Diploma in Electrical Engineering from a recognised University or Institution

Minimum two years of experience in dealing with Electromechanical equipment or related works.

Designation

Qualification and experience

(1)

(2)

(3)

1.

Survey     or                  Investigation Engineer

Graduation or Diploma in Civil Engineering or Geology from a recognised University or Institution, possessing minimum five years’ experience in survey investigation of Water Resource Projects.

2.

Dam Design Engineer (Concrete or Masonry or Earth or Rockfill Dam), as the case may be

Graduation in Civil Engineering from a recognised University or Institution, possessing minimum six years’ experience in Planning and Designs of Concrete or Masonry or Earth or Rockfill Dam, as the case may be. Preference may be given to Master’s degree in Structural or Geotechnical or Earthquake Engineering or related areas.

3.

Geologist

Graduation in Geology from a recognised University or Institution, possessing minimum six years’ of field experience in Geological investigations of Concrete or Masonry or Earth or Rockfill Dam, as the case may be. Preference may be given to Masters or Ph.D. in Geology.

4.

Hydrologist

Graduation in Civil Engineering from a recognised University or Institution, possessing minimum five years’ experience in Hydrology related areas. Preference may be given to Master’s degree in Hydrology or Water Resources Engineering.

5.

Hydro                             Mechanical Engineer

Graduation in Civil or Mechanical Engineering from a recognised University or Institution, possessing minimum five years’ experience in design or execution of Hydromechanical works in Water Resources projects.

6.

Electrical Engineer

Graduation in Electrical Engineering from a recognised University or Institution, possessing minimum five years’ experience in design or execution of Electrical works in Water Resources projects.

7.

Material or Quality control Engineer

Graduation in Civil Engineering from a recognised University or Institution, possessing minimum five years’ experience in quality control aspects of Concrete or Masonry or Earth or Rockfill Dams, selection of quarry or material etc.

8.

Instrumentation Engineer

Graduation in Civil or Mechanical or Electrical or Electronics and Instrumentation Engineering from a recognised University or Institution, possessing minimum five years’ experience in Instrumentation planning, technical specification of instruments and analysis of instrumentation data of Concrete or Masonry or Earth or Rockfill Dams.

9.

Dam Break Analysis and Emergency Action Plan Engineer

Graduation in Civil Engineering from a recognised University or Institution, possessing minimum five years’ experience in hydrological and hydraulic modelling using relevant advance modelling tools, Dam Break Analysis, Flood Routing, Inundation Mapping, preparation of Emergency Action Plan etc. Preference may be given to Master’s degree.

10.

Dam construction or rehabilitation Engineer (Concrete or Masonry or Earth or Rockfill Dam, as the case may be)

Graduation in Civil Engineering from a recognised University or Institution, possessing minimum three years’ experience in construction or rehabilitation of Concrete or Masonry or Earth or Rockfill Dam, as the case may be. Preference may be given to Master’s degree in Structural or Geotechnical or Earthquake Engineering or related areas.

Height of dam from lowest foundation to the top of dam or gross storage of the reservoir

Competent engineers for the dam safety units

Reviewing Level

Remarks

(1)

(2)

(3)

(4)

(5)

1.

Height >= 60 metre or Gross Storage >= 100 million cubic metres

Chief Engineer (Head) Superintending Engineer Executive Engineer Assistant Executive Engineer or Assistant Engineer

Engineer-in-Chief or where there is no post of Engineer-in- Chief, appropriate chief engineer as may be decided by the State Government

2.

Height >= 30 metre and < 60 metre or Gross Storage >= 60 million cubic metres and<100 million cubic metres

Superintending Engineer (Head) Executive Engineer Assistant Executive Engineer or Assistant Engineer

Chief Engineer

3.

Height >= 15 metre and < 30 metre or Gross Storage >= 30 million cubic metres and < 60 million cubic metres

Executive Engineer (Head) Assistant Executive Engineer or Assistant Engineer

Superintending Engineer or above

4.

Height >= 10 metre and< 15 metre and Gross Storage >= 1 million cubic metres and < 30 million cubic metres

Assistant Executive Engineer or Assistant Engineer (Head) Junior Engineer

Executive Engineer or above

Contents of Emergency Action Plan

Periodicity of Updation

(1)

(2)

(3)

1.

Correcting contact addresses mentioned in the emergency action plan

At least once a year

2.

Conducting table top drill (mock drill) to test the efficacy of emergency action plan

At least once in five years

3.

Comprehensive review of emergency action plan

Every ten years