Operation and Maintenance Manual for CHIMONI DAM (KL07HH0050) Kerala Water Resources Department State of Kerala
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August 2020 O&M Manual of Chimoni Dam Operation and Maintenance Manual for CHIMONI DAM (KL07HH0050) Kerala Water Resources Department State of Kerala August 2020 O&M Manual of Chimoni Dam Operation and Maintenance Manual for Chimoni Dam (Prepared By) KERALA WATER RESOURCES DEPARTMENT STATE OF KERALA August 2020 August 2020 O&M Manual of Chimoni Dam Government of Kerala Operation and Maintenance Manual Chimoni Dam August 2020 O&M Manual of Chimoni Dam KERALA WATER RESOURCES DEPARTMENT DISCLAIMER This Operation and Maintenance Manual for Chimoni Dam in no way restricts the dam operators in digressing from her/his responsibilities. The Dam Operators must exercise appropriate discretion and good judgment based on actual site condition when implementing and using the operation and maintenance manual for managing the workings of the dams and appurtenant structures. The manual was developed for the purpose of organising and managing the operation, inspection and maintenance of the dams for reducing risk and optimizing performance of the dams as a general guide. For any information, please contact: THE CHIEF ENGINEER PROJECT II KERALA STATE WATER RESOURCE DEPARTMENT THIRUVANANTHAPURAM, KERALA Email: [email protected] i August 2020 O&M Manual of Chimoni Dam FOREWARD Globally, the Operation and Maintenance (O&M) Manual of a dam/barrage is one of the most important documents which is supposed to be put in practice right from the initial filling of reservoirs. In order to address the operation and maintenance aspects, ongoing Dam Rehabilitation and Improvement Project (DRIP) has requisite scope to prepare new or update existing O&M manuals for all DRIP dams, which will become very helpful to Dam/Barrage Owners in addressing the dam specific issues comprehensively in future. This Operation and Maintenance (O & M) Manual developed is a detailed set of written descriptions with step-by-step procedures for ensuring that the dam is safely operated, frequently inspected and properly maintained. Timely inspection and preventative maintenance is necessary for the safe functioning of the dam and continued productive use of the dam and reservoir. The format of this manual is prepared following the principles published in 2018 CWC Guidelines for Operation and Maintenance of dams for the use by all Dam/Barrage Owners in developing their own site-specific manuals. Each section of the document provides the necessary instructions to operate inspect and maintain their dams. It is recommended that all dam officials in charge to use this manual for ensuring that the dam is operated and maintained in a sustainable manner and will continue to derive benefits. Chief Engineer Projects – II Thiruvananthapuram ii August 2020 O&M Manual of Chimoni Dam PREFACE The Chimoni dam is owned and operated by the Water Resources Department of Government of Kerala. Chimoni Dam is constructed in Chimonipuzha, a tributary of Karuvannur River in Thrissur District. The content of this Operation and Maintenance Manual for Chimoni Dam serves as a model for the sole purpose for managing the operation, inspection and maintenance required to be carried out to reduce risks and optimizing performance of the dam. It will assist in ensuring that the dam is functioning safely and is being properly operated and maintained. Timely inspection and maintenance is necessary for the safe functioning of the dam and continued productive use of the dam and its reservoir. The term “O&M” as employed in this Manual includes operation, inspection, maintenance and repair of dam components, replacement of equipment and appurtenant structures, as required. The Manual has been prepared based on the available data from existing DPR and from Mechanical department as per the Guidelines for preparing Operation and Maintenance Manuals for Dams (Doc. No. CDSO_GUD_DS_O3_v1.0) published by CWC in the year 2018 under DRIP. It is recommended that all dam officials involved with the operation of the dam, use this Manual to ensure that the dam is operated and maintained in a sustainable manner and in order to continue to derive benefits. iii August 2020 O&M Manual of Chimoni Dam Team Members Involved In Preparing This O&M Manual. Sri. JoshyK.A Chief Engineer, IDRB Sri. Binu Jayakumar J (in full addl charge) Overall review & Sri. SenT.G Chief Engineer, Project II Approval Sri. Alex Varghese (in full addl charge) Sri.D.Biju Director. IDRB Sri. Priyesh R (in full addl Reviewer chargr) Sri.Mohan I. K Superintending Engineer , Irrigation Reviewer Central Circle(Full Addl.charge) Sri. Balashankar Executive Engineer, Irrigation Division, Thrissur. Sri. Jayaraj T K (in Full addl Charge) Sri. Anandakrishan Assistant Executive Engineer, Chimoni Dam Project Sub Division Prepared Draft Sri. Rappai Echippara manual using available data Sri. Sibu T A Assistant Engineer, Chimoni Dam Project Section No.1 & 2 Sri. Shajan K A Echippara Smt. Sukanya R Overseer, Chimoni Dam Project Smt Soumya Sudheesh Assisted in preparing Section , Echippara the manual iv August 2020 O&M Manual of Chimoni Dam CONTENTS Disclaimer ...................................................................................................................................................... i FOREWARD ...............................................................................................................................................ii PREFACE .................................................................................................................................................. iii Team Members Involved In Preparing This O&M Manual. .............................................................. iv Contents ....................................................................................................................................................... v LIST OF FIGURES ................................................................................................................................ viii LIST OF TABLES .................................................................................................................................... ix ABBREVIATIONS ....................................................................................................................................x CHAPTER 1. GENERAL INFORMATION ...................................................................................... 1 1.1 Purpose, Location & Description of Chimoni dam .................................................................... 1 1.2 Assignment of Responsibility ....................................................................................................... 15 1.3 Collection and Reporting of Dam and Reservoir Data ............................................................. 19 1.4 Public and Project Staff - Health and Safety .............................................................................. 22 1.5 Restricted Areas .............................................................................................................................. 22 1.6 Staff Position, Communication & Warning System .................................................................. 22 1.7 Distribution of Operation & Maintenance Manuals ................................................................. 29 1.8 Supporting Documents & Reference Material ........................................................................... 29 1.9 Typical Schedule of Duties ............................................................................................................ 29 1.10 Hydro-Mechanical Inspection /Checks .................................................................................... 33 CHAPTER 2. PROJECT OPERATION ........................................................................................... 34 2.1 Basic data ......................................................................................................................................... 34 2.2 Operation Plan ................................................................................................................................ 41 2.3 Normal Operations ........................................................................................................................ 43 2.4 Emergency Operations .................................................................................................................. 54 2.5 Drawdown Facility ......................................................................................................................... 59 CHAPTER 3 - PROJECT INSPECTIONS ........................................................................................ 61 v August 2020 O&M Manual of Chimoni Dam 3.1 Types of Inspections ...................................................................................................................... 61 3.2 Informal Inspections ...................................................................................................................... 62 3.3 Scheduled Inspections .................................................................................................................... 63 3.4 Special (Unscheduled) Inspections ............................................................................................... 65 3.5 Comprehensive Evaluation Inspections ...................................................................................... 65 CHAPTER 4- PROJECT MAINTENANCE ..................................................................................... 71 4.1 Maintenance Plan ...........................................................................................................................