Operation and Maintenance Manual for Narayanpur Dam of Karnataka State Doc. No. CDSO_O&M_KA06MH0142_NARAYANPUR_DAM KAWRD_01_v2.0 MAY 2020 Central Water Commission Ministry of Water Resources, River Development & Ganga Rejuvenation1 Front Cover Photograph: Downstream view of Narayanpur Dam during rehabilitation works carried out under the Dam Rehabilitation & Improvement Project (DRIP). The Scope of work includes Treatment using polyurethane based elastic resin to reduce leakages in wall plate area, Ogee & Pier area and Treatment using acrylic based injection resin, Pointing etc at masonry portion on upstream and downstream portion of masonry dam for reducing the leakages. Providing apron concrete below flip bucket and treatment of eroded portion of spillway ogee using micro concrete works etc. Operation and Maintenance Manual for Narayanpur Dam KRISHNA BHAGYA JALA NIGAM LIMITED (A Government of Karnataka undertaking) STATE OF KARNATAKA O/o Managing Director, KBJNL, PWD Office Annex , 3rd Floor, KR Circle, Bangalore JUNE 2020 Bangalore i KRISHNA BHAGYA JALA NIGAM LIMITED Government of Karnataka Following the intrinsic requirements in the Guidelines for Preparing Operation and Maintenance Manuals for Dams published in January 2018, this manual has been developed to clearly illustrate the complexity and importance of managing operations, inspections and maintenance of any large dam. This manual has been developed under the Dam Rehabilitation and Improvement Project (DRIP) in collaboration with SPMU Bangalore duly attending the observations. Disclaimer The content of this Operation and Maintenance Manual for Narayanpur Dam in no way restricts the dam owner in digressing from her/his responsibilities. The manual serves as a guide for managing the operation, inspection and mainten- ance required to be carried out to reduce risks and optimizing performance of the dam. For any information, please contact: The Managing Director Krishna Bhagya Jala Nigam limited PWD Office Annex , 3rd Floor, KR Circle, Bangalore Email: [email protected] [email protected] [email protected] ii MESSAGE India has more than 5200 large dams. Their health and safety are of paramount importance for sustainable use of the valuable assets, besides providing protection to the people and property in the downstream areas. The Ministry of Water Resources, River Development & Ganga Rejuve- nation through the Central Water Commission (CWC), with financial assistance from the World Bank, started the Dam Rehabilitation and Improvement Project (DRIP) to rehabilitate 198 large dam projects in seven states. For managing a dam in a sustainable and scientific manner, it is very crucial for each dam owner to have dam specific Operation and Maintenance Manual that lays down procedures for the daily upkeep of the dam. An Operation and Maintenance Manual for a dam is essential for ensuring its safe functioning and for deriving continued benefits. This Operation and Maintenance Manual for Narayanpur Dam has been prepared following the Guideline for Preparation Operation and Maintenance Manuals published in January 2018 under DRIP and covers requirements for project Operation, Inspection, Maintenance, Instrumentation and Monitoring the health of Na- rayanpur Dam both during monsoon and non-monsoon periods. I recommend the dam officials to use this manual for the efficient and safe Operation and Main- tenance of the Narayanpur Dam on regular basis. I compliment all the experts who have contributed to the development of this manual and congra- tulate the Ministry of Water Resources, River Development & Ganga Rejuvenation, CWC for the initiation of such important policy protocol to address dam safety management in India. Shri. Rakesh Singh, IAS Principal Secretary Water Resources Department, Karnataka. iii FORWARD This Operation and Maintenance (O&M) Manual developed exclusively for Narayanpur Dam and 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. In this era of shrinking budgets, 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 was prepared following the principles published 2018 CWC guide- lines for operation and maintenance of dam for the use by all Dam Owners in developing their own site-specific manuals. Each section of the document provides the necessary instructions to operate, inspect and maintain their dam. It is recommended that all dam officials charged with the operation of the Narayanpur dam to use this manual to ensure their dam is operated and maintained in a sustainable manner and will continue to derive benefits. Shri. N Jayaram, IAS Managing Director, KBJNL, Bengaluru iv TEAM INVOLVED IN PREPARATION OF O&M MANUAL Sri.S.H. Nayakodi Executive Engineer, KBJNL, Dam Division, Narayanpur Sri . R.L.Hallur Assistant Executive Engineer, KBJNL, Gates Sub Division, Narayanpur Shri.. T N Ramchandra Assistant Executive Engineer(I/c), KBJNL, Dam Sub Division No-3, Narayanpur Sri. Vijaya kumar Arali Assistant Engineer, KBJNL, Gates Sub Division, Narayanpur Sri. V.L.Kambar Assistant Engineer, KBJNL, Gates Sub Division, Narayanpur Kumari. Sneha R K Assistant Engineer, KBJNL, Gates Sub Division, Narayanpur Sri. Balasubramanya M Junior Engineer, KBJNL, Gates Sub Division, Narayanpur v TABLE OF CONTENTS CHAPTER 1. - GENERAL INFORMATION 1 1.1 Introduction ........................................................................................................................... 1 1.2 Purpose, Location & Description of Narayanpur Dam ...................................................... 1 1.3 Background Details of the Project ...................................................................................... 2 1.4 Main Design Features and Components of Narayanpur Dam: ......................................... 9 1.5 Salient Features of Narayanpur Dam ................................................................................ 13 1.6 Assignment of Responsibility ........................................................................................... 15 1.7 Collection & Reporting of Dam and Reservoir Data ........................................................ 18 1.8 Public and Project Staff - Health and Safety .................................................................... 20 1.9 Distribution of Operation & Maintenance Manuals .......................................................... 32 1.10 Supporting Documents & Reference Material ................................................................. 32 CHAPTER 2. PROJECT OPERATION ........................................................................................... 34 2.1 Basic Data ........................................................................................................................... 34 2.2 Reservoir Operation: .......................................................................................................... 34 2.3 Flood Routing Criteria ........................................................................................................ 34 2.4 Revised Flood Routing study of Narayanpur Dam .......................................................... 35 2.5 Sequence of Opening or Closing of Gates ....................................................................... 49 2.6 Gate Operation at Narayanpur ........................................................................................... 49 2.7 Inflow Forecasting .............................................................................................................. 49 2.8 Exchange of data regarding rainfall, releases from dams, reservoir water levels ........ 50 2.9 Flood warning system in catchment area ........................................................................ 50 2.10 Flood communication system: .......................................................................................... 50 2.11 Methodology of Flood Regulation .................................................................................... 51 2.12 Operation of Radial Crest Gates of Narayanpur Dam .................................................... 64 2.13 Stoplog gate (3 set i.e.21 elements) for main spillway gates ........................................ 74 2.14 84 TON Capacity moving Gantry for main spillway gates ............................................ 77 2.15 New Stoplog gates for Additional Spillway Gates(one set) .......................................... 79 2.16 84 Ton Capacity new Gantry Crane for new Stoplog gates ......................................... 81 2.17 Right Bank Head Regulator Radial Gates ..................................................................... 87 2.18 Stoplog Gate for Right Bank Head Regulator Gates ..................................................... 95 2.19 15 TON Capacity Gantry for Right Bank Head Regulator Gates (RBHR) .................... 97 2.20 Left Bank Head Regulator Radial Gates ................................................................... 102 2.21 Stoplog Gate for Left Bank Head Regulator Gates(LBHR) ......................................... 109 vi 2.22 15 TON capacity moving Gantry for Left Bank Head Regulator Gates ....................... 111 2.23 River Sluice Gates ........................................................................................................... 115 2.24 Lubrication Schedule .....................................................................................................