Emergency Action Plan for SHOLAYAR MAIN/FLANKING/SADDLE DAMS MAY 2020
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Emergency Action Plan for SHOLAYAR MAIN/FLANKING/SADDLE DAMS MAY 2020 Emergency Action Plan (Tier- I) Sholayar Main, Flanking & Saddle Dams Kerala State Electricity Board Ltd. DOC No. KSEBL_EAP_20_SHOLAYAR _R1 May 2020 i Emergency Action Plan for SHOLAYAR MAIN/FLANKING/SADDLE DAMS MAY 2020 SHOLAYAR MAIN DAM (KL29HH0016) SHOLAYAR FLANKING DAM (KL29MH0015) & SHOLAYAR SADDLE DAM (KL29MH0017) DISCLAIMER This is a Tier I EAP document prepared based on the Dam Break Analysis carried out using digital elevation model (DEM) derived from Japan Aerospace Exploration Agency (JAXA) global digital surface model (DSM) dataset with a horizontal resolution of approximately 30meters (1 arc-sec). Every effort has been taken to estimate the severity of flooding and inundation areas likely to be affected due to the failure of Sholayar Main/Flanking/Saddle Dams. These estimates are based on available primary and secondary data. Every effort has been made to foresee varied emergency possibilities and develop appropriate notification procedures for timely rescue and relief operations. However, implementation of the Emergency Action Plan (EAP) involves many agencies, who are required to work in a coordinated manner to reduce the consequences of the emergency triggered by the dam site condition. Effectiveness of the rescue and relief operations depend on many factors including the adequacy and accuracy of the estimation of the severity of flooding, coordinated efforts of all the agencies involved in rescue and relief efforts and availability of facilities like power, telephones, road communications, etc. EAP Developer may therefore, not be held responsible for the efficacy of the EAP. For any information, please contact: Supriya.S Chief Engineer (Civil – Dam Safety & DRIP) Kerala State Electricity Board Ltd. Dam safety Organization, Pallom Ph. +91 9496018719 Page 1 Emergency Action Plan for SHOLAYAR MAIN/FLANKING/SADDLE DAMS MAY 2020 PREFACE Sholayar Reservoir is created as part of Sholayar Hydro Electric Project owned by KSEBL. The project is located in Thrissur District of Kerala State. There are three dams viz. Sholayar Main, Flanking & Saddle which impound a single reservoir. Theses dams come under single project and the operation and maintenance of these dams are carried out from the same office. Emergency Planning Manager remains the same for all the three dams. The inundation area consequent to breach/large control releases of these dams falls in same Panchayats and the authorities responsible for Relief and Rescue operation for all the three dams, in case of occurrence of an emergency event are also the same. Hence Tier I EAP for Sholayar Main, Flanking & Saddle dams is prepared as a single document with separate notification charts for each dam for Thrissur and Ernakulam Districts. Page 2 Emergency Action Plan for SHOLAYAR MAIN/FLANKING/SADDLE DAMS MAY 2020 TABLE OF CONTENT 1. APPROVAL AND IMPLEMENTATION .......................................................................................................... 5 2. EAP DISTRIBUTION LIST ............................................................................................................................ 7 3. LOG SHEET OF CHANGES ........................................................................................................................... 9 4. PURPOSE ................................................................................................................................................ 10 5. DAM DESCRIPTION ................................................................................................................................. 11 5.1 GENERAL ....................................................................................................................................................... 11 5.1.1 Sholayar Main Dam .............................................................................................................................. 12 5.1.2 Sholayar Flanking Dam ......................................................................................................................... 12 5.1.3 Sholayar Saddle .................................................................................................................................... 13 5.2 RESERVOIR OPERATIONS ................................................................................................................................... 13 6. RESPONSIBILITIES ................................................................................................................................... 14 6.1 DAM OWNER’S RESPONSIBILITIES ....................................................................................................................... 14 6.2 DAM SAFETY ORGANIZATION’S RESPONSIBILITIES .................................................................................................. 18 6.3 RESPONSIBILITIES FOR NOTIFICATION ................................................................................................................... 18 6.4 RESPONSIBILITIES FOR EVACUATION .................................................................................................................... 20 6.5 RESPONSIBILITIES FOR TERMINATION AND FOLLOW-UP ........................................................................................... 22 7. COMMUNICATIONS NETWORKS ............................................................................................................. 24 8. EMERGENCY DETECTION, EVALUATION, AND CLASSIFICATION ............................................................... 25 8.1. EMERGENCY DETECTION .................................................................................................................................. 25 8.2. EMERGENCY EVALUATION AND CLASSIFICATION ................................................................................................... 26 8.3. PREVIOUSLY KNOWN PROBLEMS ....................................................................................................................... 27 9. PREPAREDNESS ....................................................................................................................................... 28 9.1 SURVEILLANCE ................................................................................................................................................ 28 9.2. RESPONSE ON FORECAST OF EXCESSIVE INFLOW .................................................................................................... 28 9.3. RESPONSE DURING WEEKENDS AND HOLIDAYS ...................................................................................................... 28 9.4. RESPONSE DURING PERIODS OF DARKNESS AND ADVERSE WEATHER .......................................................................... 28 9.5. ACCESS TO THE SITE ........................................................................................................................................ 29 9.6. REMEDIAL ACTIONS ........................................................................................................................................ 29 10. SUPPLIES AND RESOURCES ..................................................................................................................... 31 10.1. CONTRACTS ................................................................................................................................................. 31 10.2. EQUIPMENT AND SUPPLIES ............................................................................................................................. 31 10.3. REPORTS ..................................................................................................................................................... 31 11. EMERGENCY OPERATIONS CENTRE ......................................................................................................... 32 11.1 ACTIVITY LOG ............................................................................................................................................... 32 11.2 COSTS OF THE EMERGENCY OPERATIONS CENTRE ................................................................................................ 32 12. INUNDATION AREA ................................................................................................................................. 33 12.1 INUNDATION MAPS ....................................................................................................................................... 33 12.2 INUNDATED AREAS ........................................................................................................................................ 33 12.2.1 Sholayar Main Dam ........................................................................................................................... 33 12.2.2 Sholayar Flanking Dam ...................................................................................................................... 36 12.2.3 Sholayar Saddle Dam ......................................................................................................................... 39 12.3. LOCAL EVACUATION PLAN .............................................................................................................................. 42 13. IMPLEMENTATION .................................................................................................................................. 43 13.1 DEVELOPMENT ............................................................................................................................................