Guidelines for Instrumentation of Large Dams September 2016 Operation and Maintenance Manual for Maskinala Dam State of Karnataka Doc. No. CDSO_O&M_KA06HH0209_MASKINALA_DAM KAWRD_01_v2.0 Central Water Commission Ministry of Water Resources, River Development & Ganga Rejuvenation Government of India O & M Manual for Maskinala Dam Front Cover Photograph: Downstream view of Maskinala Dam during flood release. Works carried out under the Dam Rehabilitation & Improvement Project (DRIP) include protection works for Dam revetment for the upstream side and turfing on earthen embankment downstream of the dam, CC road approach roads of the dam; providing head sluice service gates and emergency gates for RBC & LBC; and Installing Piezometer, In- frared auto water level recorder; CCTV surveillance system, solar street lights, barbed GI fencing &other works for security of the dam area.. Dam Safety Rehabilitation Directorate Central Dam Safety Organization Central Water Commission 3rd Floor, New Library Building (Near Sewa Bhawan) R. K. Puram, New Delhi – 110066. Email: [email protected] O & M Manual for Maskinala Dam Operation and Maintenance Manual for Maskinala Dam Prepared by the Dam Safety Rehabilitation Directorate with Assistance from KARNATAKA NEERAVARI NIGAM LIMITED (A Government of Karnataka undertaking) State of Karnataka 3rd Floor, New Library Building R. K. Puram New Delhi – 110066 October 2019 New Delhi Doc. No. CDSO_O&M_KA06 MH0209_Maskinala Dam_v2.0 Page i O & M Manual for Maskinala Dam Government of India Central Water Commission Central Dam Safety Organization Following the intrinsic requirements in the Guidelines for Preparing Operation and Maintenance Manu- als for Dams published in June 2019, this manual has been developed to clearly illustrate the com- plexity and importance of managing operations, inspections and maintenance of any large dam. This model manual has been developed under the Dam Rehabilitation and Improvement Project (DRIP) in collaboration with representatives of the Maskinala Dam Chief Engineer, Karnataka Neeravari Nigam Ltd., Karnataka. Disclaimer: Maskinala Dam is in no way restricts the dam owner in digressing from her/his responsibilities. The Central Dam Safety Organization or the Central Water Commission cannot be held responsible for the efficacy of this manual developed based solely on documents provided by the dam owner. The Dam Owner and her/his Opera- tors must exercise appropriate discretion when implementing and use of the operation and maintenance manual for managing the workings of the dam and appurtenant struc- tures. The manual serves as a model for the sole purpose of other organization for use in devel- oping their own manual for managing the operation, inspection and maintenance re- quired to be carried out to reduce risks and optimizing performance of their dams. For any information, please contact: The Director Dam Safety Rehabilitation Directorate Central Dam Safety Organisation Central Water Commission 3rd Floor, New Library Building (Near Sewa Bhawan) R. K. Puram, New Delhi – 110066. Email: [email protected] Doc. No. CDSO_O&M_KA06 MH0209_Maskinala Dam_v2.0 Page ii O & M Manual for Maskinala Dam 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 Maskinala 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 Maskinala Dam both during monsoon and non-monsoon periods. I recommend the dam officials to use this manual for the efficient and safe Operation and Maintenance of the Maskinala Dam on regular basis. I appreciate the initiative taken by CPMU, DRIP and CWC for developing this comprehensive document for implementation by the engineers and administrators of the Maskinala Dam, TLBC Division No.3, Karnataka Neeravari Nigam, Karnataka. I also compliment all the experts who have contributed to the development of this manual and congratulate 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 Doc. No. CDSO_O&M_KA06 MH0209_Maskinala Dam_v2.0 Page iii O & M Manual for Maskinala Dam Team Involved in Preparing this Model O&M Manual Chief Engineer, Irrigation Central Zone, Munirabad. Superintending Engineer, KNNL, TCC circle Yurmurus. Executive Engineer, KNNL, TLBC NO.3 division, Sindhanur Junior Engineer, KNNL, MaskiNala Project Sub Division, Maski(Draft Dawood sab Development) Doc. No. CDSO_O&M_KA06 MH0209_Maskinala Dam_v2.0 Page v O & M Manual for Maskinala Dam TABLE OF CONTENTS MESSAGE ................................................................................................................................ III FOREWORD ............................................................................................................................ IV LIST OF FIGURES ................................................................................................................... XII CHAPTER 1. - GENERAL INFORMATION ................................................................................... 1 1.1 Introduction .......................................................................................................... 1 1.2 Purpose, Location &Description of Maskinala Dam .......................................... 1 1.3 Background Details of the Project ....................................................................... 2 1.3.1 Dam site Location: ................................................................................... 2 1.3.2 Maskinala Reservoir Planning: ................................................................. 2 1.3.3 Main Design Features and Components of Maskinala Dam: ................. 6 1.4 Salient Features of Maskinala Dam ..................................................................... 7 1.5 Assignment of Responsibility ............................................................................... 8 1.5.1 Roles and Responsibilities of the AEE and AE during Monsoon ........... 9 1.5.2 Roles and Responsibilities of the SE and EE during Monsoon ............ 10 1.5.3 Roles and Responsibilities of the Chief Engineer during Monsoon ..... 10 1.6 Collection & Reporting of Dam and Reservoir Data ......................................... 11 1.7 Public and Project Staff - Health and Safety ...................................................... 13 1.7.1 Restricted Areas ...................................................................................... 13 1.7.2 Details of the Security arrangements at Maskinala Dam Site................ 13 1.8 Staff Position, Communication & Warning System ........................................... 15 1.8.1 Schedule of General Duties for Project Engineers ................................. 17 1.8.2 Hydro-Mechanical /Electro-Mechanical Inspections / Checks ........... 19 1.9 Distribution of Operation & Maintenance Manuals ......................................... 22 1.10 Supporting Documents & Reference Material ................................................ 23 CHAPTER 2. PROJECT OPERATION ................................................................................... 24 2.1 Basic Data ........................................................................................................... 24 2.1.1 Area Capacity curves. ............................................................................. 24 2.1.2 Design Flood and Features Related to Safety ........................................ 24 2.2 Flood Management at Maskinala Reservoirs .................................................... 24 2.2.1 Gate Operations: ..................................................................................... 24 2.2.2 Rule Curve .............................................................................................. 25 2.2.3 Recommended Gate Operation Procedures for Normal Flow Conditions25 2.2.4 Sequence of Opening or Closing of Gates ................................................. 27 2.2.5 Inflow Forecasting .................................................................................. 29 2.2.6 Methodology of Flood Regulation at Maskinala Reservoir ................... 29 Doc. No. CDSO_O&M_KA06 MH0209_Maskinala Dam_v2.0 Page vi O & M Manual for Maskinala Dam 2.2.6.1 Inflow Computation ............................................................................. 29 2.2.6.2 Examples of Inflow Computation ...................................................... 30 Example1. ........................................................................................................