In exercise of the powers conferred by subsection 1, read with clauses

EXTRAORDINARY PART III—Section 4 PUBLISHED BY AUTHORITY No. 173] NEW DELHI, THURSDAY , MARCH 1 4, 2024 /PHALGUNA 24, 1945 CG-DL-E-14032024-252982 थ :- (1) (2) (3) (1) (2) (3) (1) (2) (3) (1) (2) (3) (1) (2) (3) (1) (2) (3) (1) (2) (3) (4) (5) 4. (1) (2) (3) (1) (2) (3) (4) (5) (1) (2) (3) NATIONAL DAM SAFETY AUTHORITY NOTIF ICATION New Delhi, the 13th March , 202 4 F. No. TE-32/2/2023 -NDSA -MOWR .—In exercise of the powers conferred by sub-section (1), read with clauses (c), (d), (e ), (g), (o) and (q) of sub-section (2) of section 54 of the Dam Safety Act, 20 21 (41 of 2021), the National Dam Safety Authority on the recommendations of the National Committee , hereby makes the following regulations, namely: - 1. Short title and commencement . – (1) These regulations may be called the National Dam Safety Authority Regulation, 2023. (2) They shall come into force on the date of their publication in the Official Gazette. 2. Definitions : - (1) In these regulations, unless th e context otherwise require s, - (a) ―Act‖ means the Dam Safety Act, 2021 ; (b) ―Authority ‖ means the National Dam Safety Authority established under section 8 of the Act; (c) ―section ‖ means section of the Act . (2) Words and expressions used herein and not defined in these regulations but defined in the Act shall have the meanings respectively assigned to them in t he Act. 3. Maintenance of log books or database. – (1) Every State Dam Safety Organisation shall maintain a log book or database for each specified dam under their jurisdiction recording therein all activities related to the surveillance and inspection an d important events related to dam safety . (2) The log b ook for data base shall be in digital form containing the following details, namely :- (a) a cover page containing the n ame of the dam and the n ame, phone number and email-id of the officer in-charge al ong with designation and date of taking charge of the dam; (b) salient features of the dam and barrage or weir as specified in the table s below , namely: - Table A 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 Capacit y (million cubic metres ) (i) gross storage (ii) live storage 17. Total length of dam (m etres ) 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 l evel) (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 Rockf ill 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 (undergroun d 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 Table B Sl. No. Title Details (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 deepest foundatio n) 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 Details of Stilling Basin: (i) length (ii) width (iii) top elevation (iv) top of training wall (v) length of downstream apron 15. Details of cut off (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 bri dge at barrage (m etres ) (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) sill level (vi) discharging capaci ty (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 block works (iii) length of upstream loose stone protection (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 (hectare s) (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 (c) the periodicity and the observations or recording of the items as specified in the table below, namely: - Table 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 (m illimetre ) during the day in the catchment Area or Sub catchment Area or Dam site On daily basis 7. Any other relevant items (d) record of the maintenance works as specified in the table below, namely: - Table Sl. No. Details 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. (e) record of the incidents or failures or unusual events as specified in the table below, namely: - Table Sl. No. Details Date and time of incident s 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 ap proved 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. (f) brief details of inspections as specified in the table below, namely: - Table Sl. No. Details of inspections 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. 4. Qualifications, experience and training of individuals responsible for safety of dams. – (1) Every individual responsible for safety of specified dams and all activities related thereto shall possess the qualifications and experience and undergo the training, as specified in the table below, namely: - Table Sl. No. 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 recogni sed 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. (2) Relaxation in experience may be considered for officers recruited at entry level , namely, Junior Engineer or Assistant Engineer or Assistant Executive Engineer or equivalent, and in such cases, adequate training shall be provided at the time of joining the post. 5. Engineers to be employed for the purpose of investigation, design and construction of specified dams. –Any construction or alteration of a specified dam shall be undertaken subject to investigation, design and construction being done by the competent engine ers having the qualification and experience as specified in the table below, namely: - Table Sl. No. 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 invest igations 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 m inimum 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 m inimum 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 m inimum five years’ ex perience 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 m inimum five years’ experience in quality contro l 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 Insti tution, possessing m inimum 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 m inimum five years’ experience in hydrological and hydraulic modelling using relevant advance modelling tools, Dam Break Analysis, Flood Routing, Inundation Ma pping, 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 m inimum 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 Earthq uake Engineering or related areas . 6. Level of competent engineers for dam safety units. - For each specified dam, the owner shall, within the operation and maintenance establishment, provide a dam safety unit consisting of the competent levels of engineers as specified in column (3) and their reviewing officers specified in column (4) of the table below, for the category of dam specified in the corresponding column (2) of the said table, namely: - Table Sl. No. 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 Chief Engineer (Head) Superintending Engineer Engineer -in-Chief or where there is no Gross Storage >= 100 million cubic metres Executive Engineer Assistant Executive Engineer or Assistant Engineer 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 m etre 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 7. Updating emergency action plan. -The emergency action plan mentioned in column (2) of the table below, of specified dams referred to in section 36 of the Act shall be updated at the intervals mentioned in the corresponding column (3) of the said table, namely: - Table Sl. No. Contents of E mergency 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 8. Review of design flood of existing specified dams. -The design flood review referred to in clause (b) of sub-section (2) of section 38 of the Act shall be carried out in every ten years or such lesser period as may be determined by the National Dam Safety Authority. ANIL JAIN , Chairman [ADVT. -III/4/Exty./ 827/2023 -24] Uploaded by Dte. of Printing at Government of I ndia Press, Ring Road, Mayapu ri, New D elhi-110064 and Published by the Controller of Publications, Delhi -110054.