Operation and Maintenance Manual for Kallada Dam in No Way
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Operation and Maintenance Manual for Kallada Dam (KL07HH0037) Kerala Water Resources Department State of Kerala August 2020 O&M Manual of Kallada Dam Operation and Maintenance Manual for Kallada Dam (Prepared By) KERALA WATER RESOURCES DEPARTMENT STATE OF KERALA August 2020 1 August 2020 O&M Manual of Kallada Dam Government of Kerala Operation and Maintenance Manual Kallada Dam 2 August 2020 O&M Manual of Kallada Dam KERALA WATER RESOURCES DEPARTMENT DISCLAIMER This Operation and Maintenance Manual for Kallada 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 Kallada 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 Kallada Dam PREFACE Every dam requires an operation and maintenance manual for ensuring step by step operation procedure for ensuring that the dam is safely operated frequently and properly maintained. This manual also helps to avoid health deterioration and extend service life of these assets. The O and M manual includes operation, inspection, maintenance and repair of dam components, replacement of equipments and appurtenant structure as required. Kallada irrigation and Tree crop development scheme is the largest irrigation project in the State of Kerala. This project comprises of straight gravity masonry dam across the Kallada river, at Parappar near Thenmala in Kollam District at 8 057’ N Latitude and 77 0 04’ 20’’ E Longitude. It is situated 19 Km from Punalur and 2 Km from Thenmala railway station. The aim of Kallada Irrigation Project is to ensure water in the canals for irrigation and power generation. The project was commissioned in 1986. At present designated ayacut under Kallada Project is 53100 Ha. The project has now become an integral part of the lives of the people of Kollam, Pathanamthitta and Allapuzha Districts and its surroundings, since it is the main source of water for agricultural and drinking purpose. The main dam is a straight gravity masonry dam of 335m long. Height of the dam above the deepest foundation is 85.35 m. The length of spillway is 42.06 m with 3 Nos of radial gates each having size of opening 12.19 X 9.14m. The storage capacity of the reservoir is 487.92Mm3 at FRL with a design spill way capacity of 1118.26 cumecs. This manual is provided to assist the dam owner in management of Kallada project in a safe and efficient manner. The Dam Safety Bill, 2010, introduced in the Lok Sabha on August 30, 2010, and subsequently referred to the Parliamentary Standing Committee on Water Resources for examination, prompted the need for updated procedures for dam owners to follow during day to day, 24/7 operation of iii August 2020 O&M Manual of Kallada Dam their respective dams. The draft Dam Safety Bill requires State Dam Safety Organizations (SDSO) to keep perpetual vigilance, carry out inspections regularly, and monitor the operation and maintenance of all dams in order to ensure their safe functioning. Where a SDSO does not exist, the National Committee on Dam Safety acting through the Central Dam Safety Organization is required to carry out these activities. This manual was prepared following the guidelines published by DRIP, CWC. iv August 2020 O&M Manual of Kallada Dam CONTENTS Disclaimer ................................................................................................................... i FOREWARD ............................................................................................................... ii PREFACE .................................................................................................................. iii LIST OF TABLES ...................................................................................................... vii LIST OF FIGURES .................................................................................................... vii ABBREVIATIONS ...................................................................................................... ix Chapter 1. General Information .................................................................................. 1 1.1 Purpose, Location, Description of Kallada Dam (Parappar Dam) ..................... 1 1.2 Assignment of responsibility ............................................................................ 26 1.3 Collection & Reporting of Dam and Reservoir Data ........................................ 32 1.4 Public Utilities and Safety................................................................................ 33 1.5 Restricted Areas ............................................................................................. 34 1.6 Staff position, Communication & Warning System .......................................... 36 1.7 Distribution of Operation & Maintenance Manuals .......................................... 42 1.8 Supporting Documents& Reference Material .................................................. 43 1.9 Typical Schedule of Duties .............................................................................. 43 CHAPTER 2. PROJECT OPERATION .................................................................... 48 2.1 Operation Plan ............................................................................................. 48 2.2 Normal Operations .......................................................................................... 49 2.3 Emergency Operations ................................................................................... 72 2.4 Initial Filling of Reservoir ................................................................................. 74 2.5 Record Keeping .............................................................................................. 74 CHAPTER 3.PROJECT INSPECTIONS .................................................................. 76 3.1 Types of Inspections ....................................................................................... 76 3.2 Informal Inspections ........................................................................................ 76 3.3 Scheduled Inspections .................................................................................... 77 3.4 Special (Unscheduled) Inspections ................................................................. 78 v August 2020 O&M Manual of Kallada Dam 3.5 Comprehensive Evaluation Inspections .......................................................... 79 CHAPTER 4.PROJECT MAINTENANCE ................................................................ 85 4.1 Maintenance Plan ........................................................................................... 85 4.2 Maintenance Priorities .................................................................................... 86 4.3 Maintenance Items .......................................................................................... 88 4.4 Materials requirements for maintenance during monsoon period ................. 111 4.5 Establishment Requirements ........................................................................ 112 4.6 Preparation of O&M Budget .......................................................................... 112 4.7 Maintenance Records ................................................................................... 115 Chapter 5. INSTRUMENTATION AND MONITORING .......................................... 117 5.1 General Instrument types .............................................................................. 117 5.2 Instrumentation at Kallada Dam ...................................................................