(See Paragraph-6) FORM 1
Note : If space provided against any parameter is inadequate, Kindly upload supporting document under 'Additional Attachments if any' at the last part of the Form1. Please note that all such Annexures must be part of single pdf document.
(I)Basic Informations S.No Item Details . 1. Name of the Project Kirthai Stage-l HEP (390 MW)
2. Project Sector River Valley and Hydroelectric Projects
3. Location of the project District Kishtwar, J&K
4. Shape of the project land point uploaded 10 km radius topo map (Annexure - I) GPS file
5. Brief summary of project Brief Summary of Project (Annexure - II)
6. State of the project Jammu & Kashmir
Details of State of the project
S.no State Name District Name Tehsil Name
(1.) Jammu & Kashmir Kishtwar Paddar
7. Town / Village Gulabgarh
8. Plot/Survey/Khasra No. 52 C 3
9. S. No. in the schedule 1(c) River Valley projects
Proposed capacity/area/length/tonnage to be handled/command area/lease 390 MW 10. area/number or wells to be drilled Underground Power House (4x95)MW Dam toe Power House (1x10)MW
New/Expansion/Modernization 11. New
12. Category of project i.e. 'A' or 'B' A
Does it attract the general condition? If 13. yes, please specify No
15. Does it attract the specific condition? No
Is there any litigation pending against 16. the project? No
Nearest railway station along with Udhampur 270 km 17. distance in kms. 1
18. Nearest airport along with distance in Jammu – 330 km kms
Nearest Town/City/District Headquarters 19. Kishtwar, 75 km along with distance in kms Details of alternative sites examined The evolution of the Kirthai HEP started with the CEA No shown on a toposheet identifying a diversion site with river bed El 1722 masl for diverting Chenab water by means of 11 km long HRT to a power house (1120 MW) to utilize a gross head of 275 m. subsequently a storage scheme with a storage of 0.6 MAF, comprising of 220 m high dam at Kirthai, 8.14 km long HRT to un underground powerhouse (750 MW) near Lidrari Nallah, was conceived. However, to avoid submergence of the vast fertile area in the Padder valley and consequent displacement of a large population, the scheme underwent drastic evolutionary change as it was split 20. into two parts. Investigations at three potential sites for the upper stage culminated in the preparation of a DPR in respect of a 160 m high concrete dam across Chenab just u/s of Gulabgarh resulting into a reservoir with FRL & MDDL at 1895 masl and 1887.58 masl respectively and an underground power house (4 X 60 MW) about 150m d/s of dam axis which was later during 2012-13 modified into 4 X 95MW and an auxiliary power house (10 MW), due to increased water availability in 90% dependable year based on updated water flow series upto 2009-10
21. Whether part of interlinked projects? No
Whether the proposal involves approval / clearance under the Forest Conservation 22. Act, 1980 ? Yes, yet to be submitted Status of Application for Forest Clearance
Whether the proposal involves approval/clearance under the wildlife 23. No. (Protection)Act,1972?
Whether the proposal involves 24. approval/clearance under the C.R.Z No notification,2011?
Whether there is any Government Project comes under the provisions of Annexure-D of Order/Policy relevant/relating to the site? Indus water treaty and the project area comes under 25. Forest Act
Whether there is any litigation pending against the project and/or land in 26. whichNo the project is proposed to be set No up ?
27. Project Cost (in lacs) 230404 lakh
2
II Activity
1. Construction, operation or decommissioning of the Project involving actions, which will cause physical changes in the locality (topography, land use, changes in water bodies, etc.)
Details there of (with approximate Information/Checklist S.No Yes/No quantities/rates, wherever possible) with confirmation source of information data
The land use of private land being used for establishing colonies shall not change as it will continue under land use class agriculture & settlement but the land use of private land coming under submergence shall change from agriculture to water body. The land use class of private land required for new road construction Permanent or temporary change in shall change in to bult-up land use. The land use, land cover or topography underground components falling in forest area 1.1 including increase in intensity of land Yes will not cause any impact on the land use. use (with respect to local land use Similarly, the land use of forest area diverted for plan) dump areas and quarry sites will not cause any impact on land use as these shall continue to be under forest land use class. However, forest land and revenue land coming in submergence shall have its land use changed permanently in water body
Clearance of existing vegetation at various Clearance of existing land, vegetation 1.2 Yes project component sites during construction and buildings? phase is envisaged.
Muck dumping sites presently under open forest 1.3 Creation of new land uses? Yes or wasteland would be used temporarily before being converted to plantations.
Pre-construction activities like Bore Hole, Drifting, geological testing as suggested by GSI Pre-construction investigations e.g. 1.4 Yes has been carried out. bore houses, soil testing?
The project shall comprise of: • A 165-m high concrete gravity dam • 4 nos. of Orfice type spillways and 2 nos of high level spillway. • 1 no. head race tunnel of 10.5m diameter on the left bank from intake structure and 1 no. intake for auxiliary power house located at the right bank. 1.5 Construction works? Yes • Vertical shaft of 10.5m diameter. • Horizontal tunnel of diameter 10.5m diameter upto manifold and branched into 4 nos. Unit pressure Shaft feeding main powerhouse unit (4 X 95 MW). • 1 no. surface penstock for auxiliary power house of 10MW on right bank.
3
1.6 Demolition works? No The project does not entail any demolition works. Besides, the structure coming under submergence. Temporary Labour sheds for Labourer at some places shall be created during construction phase, which will be demobilized before commissioning.
Temporary sites used for construction Temporary labour camps would be required for 1.7 works or housing of construction Yes construction phase. workers?
Above ground buildings, structures or Above ground structures shall include project earthworks including linear components like dam, power intake, desilting structures,cut and fill or excavations arrangement and surface power house (10MW) 1.8 Yes and fill or excavations besides permanent and temporary buildings and roads. The description of such components has been provided in 1.5 Construction of Head race tunnel as water conductor system from dam to power house & Underground works including mining or 1.9 Yes underground powerhouse, besides tunneling? Desilting and flushing system.
Reclamation works would involve reclamation of quarry and muck dumping sites because of project activities which will be done on completion of civil work. Adequate provision 1.10 Reclamation works? Yes based on detailed estimate has been made for Muck Management, Restoration Plan for Quarry Sites, Landscape and Restoration Plan under EMP. 1.11 Dredging? No No dredging is involved
1.12 Offshore structures? No Not Applicable
1.13 Production and manufacturing No Hydro power generation is proposed by utilizing processes? head and the available discharge in the river
1.14 Facilities for storage of goods or Yes Project is not a goods manufacturing or materials? production unit. However, during project construction/operation, storage for materials would be needed. Facilities for treatment or disposal of Project process does not entail generation of solid waste or liquid effluents? solid or liquid waste. However, sewerage and solid waste will be generated from project colony and labour camp for which sewerage treatment plant and septic tank have been proposed respectively. 1.15 Yes Municipal Solid waste would be disposed as per MSW Rules 2016 for which Sanitation and solid waste management plan has been formulated under EMP. However, as far as disposal of muck (generated from the project components) is concerned, a separate muck management plan has been prepared under EMP
4
The operational staff would be housed in the colonies mentioned above as upon Facilities for long term housing of commissioning of the project construction staff 1.16 Yes operational workers? would be shifted out. Suitable sewerage and solid waste disposal mechanism has been suggested for the project colony in the EMP. New approach road during construction and New road, rail or sea traffic during 1.17 Yes operation phase. construction or operation? No rail / sea traffic is involved.
New road, rail, air water borne or No new road except realignment of existing other transport infrastructure Kishtwar – Gulabgarh - Sansari road in about a including new or altered routes and stretch of 4.5km length under submergence will stations, ports, airports etc? be required. However, for transportation of 1.18 No machinery, widening and strengthening of existing road shall be required. For executing various civil works roads will be made for linking the works site to other site and to job facility areas. Closure or diversion of existing There would not be any closure or diversion of existing transport routes or infrastructure roads or routes leading to any traffic diversion 1.19 No leading to changes in traffic movements? Transmission line for evacuation of power. New New or diverted transmission lines or 1.20 Yes pipelines shall be laid for providing drinking pipelines? water supply to colonies / labour camps.
Impoundment, damming, culverting, The proposed dam shall impound water on u/s. 1.21 realignment or other changes to the Yes With the formation of the reservoir, the hydrology of watercourses or aquifers? hydrology of the River shall be affected.
1.22 Stream crossings? No No stream is proposed to be crossed by any cross- drainage work.
River water after leaving environmental flow will be diverted through HRT for power generation. No consumptive use involved and Abstraction or transfers of water from 1.23 Yes entire diverted water will be released back into ground or surface waters? the river after powerhouse.
Changes in water bodies or the land Formation of reservoir will effect a change in surface affecting drainage or run-off? water body and the land surface. 1.24 Yes Environmental flow as per MOEF guidelines has been allowed to take care of d/s effect / change. Transport of personnel or materials for Construction would entail, transportation of construction, operation or construction material locally and from outside. decommissioning? During construction, the resident labour from 1.25 Yes labour camps shall be daily transported to the work site and on de commissioning, the personnel shall be shifted from the project site except the persons required for operation phase Project does not involve any long terms Long-term dismantling or 1.26 Yes dismantling of its components. However, decommissioning or restoration works? batching plant, stone crushers, temporary work
5
shops, labour sheds shall be dismantled after commissioning of the project.
Ongoing activity during No decommissioning activity is warranted 1.27 decommissioning which could have an No impact on the environment? Influx of people to an area in either About 1800 persons shall be employed during temporarily or permanently? peak construction phase. However, during 1.28 Yes operation phase only 100 to 150 technical staff/labour shall be required. 1.29 Introduction of alien species? No Only indigenous species will be planted
1.30 Loss of native species or genetic No diversity? The aspect prescribed in the TOR have been complied. 1.31 Any other actions? No
2. Use of Natural resources for construction or operation of the Project (such as land, water, materials or energy, especially any resources which are non-renewable or in short supply):
S.No. Information/Checklist Yes/No Details thereof (with approximate Confirmation quantities/rates, wherever possible) with source of information data 2.1 Land especially undeveloped or Yes 48 ha private land agricultural land (ha)
180 KLD water will be required for drinking / domestic purpose which will be drawn from the Water (expected source & competing existing springs/local khad. The requirement of 2.2 Yes users) unit: KLD about 250 KLD of water for construction purpose shall be met from the main river as well as the seepage water from the tunnel.
2.3 Minerals (MT) No No minerals shall be used for the construction of the project except the minor minerals i.e. boulder, sand and bajri.
Approximately 15.20 lac cum and 7.60 lac cum coarse and fine aggregate respectively shall be Construction material – stone, required besides graded filter material (0.01 lac 2.4 aggregates, sand / soil (expected Yes cum) and impervious material i.e. clay 0.01 lac source – MT) cum as construction material. The requirement shall be partly met from the excavated material and from the rock-in-situ quarry sites. The conventional use of fuel wood by the labour shall be totally banned and it will be substituted 2.5 Forests and timber (source – MT) Yes through use of LPG/ Kerosene. Timber shall be required only for construction works in buildings.
Construction power (20 MW) shall be met from Energy including electricity and fuels the existing transmission network in the area. 2.6 (source, competing users) Unit: fuel Yes 400 LPG cylinders (6.4 MT/month) shall be used (MT), energy (MW) as fuel in lieu of fuel wood. The demand of POL and HSD oil shall be met from outside. 6
Any other natural resources (use Use of solar heater and light in the project area 2.7 appropriate standard units) Yes has been provided in the EMP.
Use, storage, transport, handling or production of substances or materials, which could be 3 harmful to human health or the environment or raise concerns about actual or perceived risks to human health
Details thereof (with approximate S. quantities/rates, wherever possible) with Information/Checklist confirmation Yes/No No. source of information data
Explosives will be used for blasting in construction of roads, surface excavation in Use of substances or materials, which hard rocks as well as underground works. are hazardous (as per MSIHC rules) to 3.1 Yes Explosive shall be stored in properly located human health or the environment (flora, magazines and shall be transported through fauna, and water supplies explosive van. All precautions as laid down under relevant rules shall be followed
Changes in occurrence of disease or There is a slight possibility of increase in some affect disease vectors (e.g. insect or vector population due to impoundment of 3.2 water borne diseases) Yes water. However, owing to low temperature and high altitude of the project area, the possibility of occurrence of such disease is very remote.
The project will open new vista of employment and increase business which will lead to better living conditions. Besides this, it is proposed to spend 0.5% cost of the project for local area development works through LADA. There will Affect the welfare of people e.g. by 3.3 Yes be better living conditions due to opening of changing living conditions? employment in the area. Project will uplift the economy of the local people by direct and indirect employment opportunity. Besides this the PAF shall be properly compensated and rehabilitated as per RFCTLARRA, 2013 Vulnerable groups of people who could No hospital, school exists nearby the project 3.4 be affected by the project e.g. hospital No area and the nearest PHC is at Atholi. patients, children, the elderly etc.
3.5 Any other causes No None
4 Production of solid wastes during construction or operation or decommissioning (MT/month)
S.No. Information/Checklist Yes / Details thereof (with approximate confirmation No quantities/rates, wherever possible) with source of information data 4.1 Spoil, overburden or mine wastes Yes Surface as well as underground excavation shall result in generation of excavated muck and overburden waste. Part of the excavated material shall be consumed as aggregate material as well as back fill material and the rest shall be disposed properly at designated muck sites located away from the water bodies.
7
Solid municipal waste shall be generated from project colony and labour camps. The collected bio-degradable waste will be disposed at suitable Municipal waste (domestic and or landfill sites, organic waste will be suitably 4.2 Yes commercial wastes) processed to for compost while the non-bio- degradable waste shall be incinerated. Commercial waste shall be stored and periodically disposed by auction. Hazardous wastes (as per Hazardous No hazardous waste will be produced 4.3 Waste Management Rules) No
4.4 Other industrial process wastes No No other industrial process wastes will be generated during construction and operational stages. 4.5 Surplus product No In view of HEP, no surplus product will be produced. Effluent is not generated in hydro-electric generation. However, liquid effluent shall be generated from the project colonies and labour Sewage sludge or other sludge from 4.6 Yes camps which will be suitably processed through effluent treatment STP and septic tanks/soak pits respectively. The liquid effluent after treatment shall be discharged into nearby stream. About 19.26 lakh cum muck shall be generated during construction phase of which approximately 70% shall be consumed and the rest will be suitably disposed at suitable sites. The waste like the roofing material, wooden 4.7 Construction or demolition wastes Yes sections and panel of the doors shall be retrieved and the balance in the form of rubbles of the stone masonry work or the CC blocks of the walling shall be used wherever needed by the project authority. 4.8 Redundant machinery or equipment Yes The work shall be carried out contractually, therefore, the construction agency shall remove from the site all the redundant plant and equipment from the site after completion of the work. 4.9 Contaminated soils or other materials No No contamination of the soil or other materials is envisaged during construction or in operation phase. The POL shall be stored in proper containers and inside sheds / stores provided with suitable flooring and equipped with fire protection arrangements. 4.10 Agricultural wastes No No agriculture waste is produced during hydro- electric generation. 4.11 Other solid wastes No -
5 Release of pollutants or any hazardous, toxic or noxious substances to air(Kg/hr)
Information/Checklist confirmation Yes/ Details thereof (with approximate S.No. No quantities/rates, wherever possible) with source of information data Emissions from combustion of fossil Yes There will be emissions from use of vehicles and 5.1 fuels from stationary or mobile sources construction equipment which will be limited to project site only. The maximum incremental GLC 8
in respect of PM10 & NOx was 8.4 ug/cum and 0.14 ug/cum respectively.
5.2 Emissions from production processes No Hydro power generation process does not lead to any emission. Emissions from materials handling Yes The use of transport vehicle for carriage of including storage or transport material shall lead to emission. However, there 5.3 will be no emission during material handling except for the dust pollutants during handling of cement bags, which will be controlled. Yes There will be emissions from use of vehicles and construction equipment which will be limited to project site. The maximum GLC due to excavation Emissions from construction activities 5.4 activity and crushing of aggregates was found to including plant and equipment be 17.02 ug/cum inside dam complex and there was insignificant increase 0.14 ug/cum in the nearby village.
Dust or odours from handling of Yes Dust/odours may be produced from handling of 5.5 materials including construction material, municipal waste and sewage waste. materials, sewage and waste
5.6 Emissions from incineration of waste Yes Emission shall be produced during incineration of the non-bio-degradable solid waste at the incinerator site. Emissions from burning of waste in open No No burning of material is proposed at any site 5.7 air (e.g. slash materials, construction other than the incinerator site. debris) 5.8 Emissions from any other sources No -
6 Generation of Noise and Vibration, and Emissions of Light and Heat:
Yes/ Details thereof (with approximate S.No. Information/Checklist confirmation No quantities/rates, wherever possible) with source of information data
Yes Noise and Vibrations will be generated during operation of drilling equipment and blasting and other construction equipment. During operation phase, there shall be high noise levels at the From operation of equipment e.g. 6.1 turbine and generator floors. However, the impact engines, ventilation plant, crushers shall be on the workers who will be engaged in shifts. There shall be no impact to human/animal population in areas outside the power house main access tunnel (MAT). 6.2 From industrial or similar processes No No industrial process is involved in hydro-electric generation. Yes Noise and Vibrations will be generated during 6.3 From construction or demolition operation of drilling equipment and blasting and other construction equipment.
Yes There shall be setting up of ground vibrations and instantaneous increase in noise level (air 6.4 From blasting or piling overpressure) during blasting. The noise modeling has shown that the noise level of 91 9
dB(A) at the dam site gets highly attenuated to 46 dB(A) about 900m from it. The value of PPV was assessed as 0.39 mm / sec at about 750 m from the blasting site and is within the prescribed limit by DGMS. There shall be no piling activity during construction phase. Yes The movement of tippers for transportation of muck and transit concrete mixtures during construction shall cause noise and vibration. During O&M phase there shall be no increase in 6.5 From construction or operational traffic noise and vibration level as the only operational traffic shall be the staff bus deployed for movement of shift workers and also the inspection vehicles. 6.6 From lighting or cooling systems No No heat and light emissions except during welding operation are generated during the construction phase of a hydro-electric project. However, some heat may be generated inside the power house for which proper cooling system shall be provided. 6.7 From any other sources Yes Low intensity heat generation are anticipated in the transformer cavern of the power house for which proper air-conditioning and cooling system shall be devised.
7. Risks of contamination of land or water from releases of pollutants into the ground or into sewers, surface waters, groundwater, coastal waters or the sea:
Information/Checklist confirmation Yes/No Details thereof (with approximate S.No. quantities/rates, wherever possible) with source of information data From handling, storage, use or spillage No Handling, storage or use of explosive will not of hazardous materials contaminate land / water. The oil spillage from 7.1 the POL shall be collected in the settling tank and the oil separated before disposal of the liquid. From discharge of sewage or other No The liquid effluent shall be generated from the effluents to water or the land (expected project colonies and labour camps which will be mode and place of discharge) suitably processed through STP and septic 7.2 tanks/soak pits respectively. The liquid effluent after treatment shall be discharged into nearby khad. Yes Excavation in the hard rock by drilling and blasting and the running of excavators and By deposition of pollutants emitted to 7.3 loaders shall cause fugitive dust as well as air into the land or into water gaseous emissions which get deposited on land and water. 7.4 From any other sources No -
Is there a risk of long term buildup of No No incidence of long term builds up of pollutants pollutants in the environment from is expected as the project is likely to be these sources? completed within a time frame of 60 months 7.5 including the pre-construction activities. Moreover, the project area is in remote location and due to openness of the area, the pollutant load is cleared on daily basis.
10
8. Risk of accidents during construction or operation of the Project, which could affect human health or the environment
Information/Checklist confirmation Yes/No Details thereof (with approximate S.No. quantities/rates, wherever possible) with source of information data
Yes Since explosives are to be used for blasting during tunneling as well as the surface From explosions, spillages, fires etc excavation in hard rocks, the attendant risk is 8.1 from storage, handling, use or always there. To avoid accident due to handling production of hazardous substances of explosives, proper precautionary and safety measures as suggested in relevant Act and codes shall be adopted. 8.2 From any other causes Yes During tunneling, due to formation of chimney, overhead rock falls cannot be ruled out. Yes The topography of the lease area is such that it Could the project be affected by natural cannot be affected due to disaster in the form of disasters causing environmental flood and land slide. The lease area lies within 8.3 Seismic Zone-IV as per seismic zoning map of damage (e.g. floods, earthquakes, India (IS: 1893: 2002). landslides, cloudburst etc)?
9. Factors which should be considered (such as consequential development) which could lead to environmental effects or the potential for cumulative impacts with other existing or planned activities in the locality
Information/Checklist confirmation Yes/No Details thereof (with approximate S. quantities/rates, wherever No. possible) with source of information data
Lead to development of supporting utilities, ancillary development or development stimulated by the project which could have impact on the environment e.g.: Yes Road from Kishtwar-Gulabgarh on which dam site is located shall involve widening and • Supporting infrastructure strengthening. (roads, power supply,waste or 9.1 waste water treatment, etc.) No • Housing development No • extractive industries No • sup No ply ind ustr ies • Other Lead to after-use of the site, which could No None of the sites has any potential for after use 9.2 have an impact on the environment except the muck disposal site which will be provided with vegetal cover. 9.3 Set a precedent for later developments No -
Have cumulative effects due to proximity Yes The tail race of Kirthai-I HEP (390 MW) is about to other existing or planned projects with 2.5 km u/s of the tip of the reservoir of Kirthai – 9.4 similar effects II HEP (930 MW). Thus, the free flow stretch of the river in both cases is more than 1km. 11
(III) Environmental Sensitivity
Areas Name / Aerial distance (within S.No. Identity 15km.) Proposed project location boundary
Areas protected under international Kishtwar (40 km) conventions, national or local legislation for National 1 their ecological, landscape, cultural or other Park related value Areas which are important or sensitive for None The project area lies in mountainous terrain ecological reasons - Wetlands, watercourses of lesser Himalayas while the catchment lies 2 or other water bodies, coastal zone, in Greater Himalayas. There are no sensitive biospheres, mountains, forests areas like wetland, coastal zone and biosphere. Areas used by protected, important or None None sensitive species of flora or fauna for 3 breeding, nesting, foraging, resting, over wintering, migration 4 Inland, coastal, marine or underground None Due to topography of the area, there are no waters inland, coastal and marine water. 5 State, National boundaries No Neither International Boundary with China nor the nearest State boundary with Himachal Pradesh lies within 15km of the project site. Routes or facilities used by the public for Kishtwar The present route is being used access to recreation or other tourist, pilgrim Gulabgar by local populace and the route 6 areas h road also, leads to pilgrim area of Macheal Yatra.
7 Defence installations No There are no defence installations in or around the project area.
8 Densely populated or built-up area None The project area is scarcely populated or built-up area Areas occupied by sensitive man-made land None No such facility or sensitive 9 uses (hospitals, schools, places of worship, area falls in or around project community facilities) area.
Areas containing important, high quality or None Project area does not contain scarce resources. (ground water resources, any important, high quality or 10 surface scarce resource. resources, forestry, agriculture, fisheries, tourism, minerals) Areas already subjected to pollution or None environmental damage. (those where 11 existing legal environmental standards are exceeded) Areas susceptible to natural hazard which Yes There is a possibility of cloud burst which can could cause the project to present result in enormous discharge leading to environmental problems (earthquakes, barrage failure. Besides this, the project lies 12 subsidence, landslides, erosion, flooding or in seismic zone – IV, Earthquake of high extreme or adverse climatic conditions) intensity cannot be ruled out similar effects
12
(IV) PROPOSED TERMS OF REFERENCE FOR EIA STUDIES
1 Uploaded Proposed TOR File Uploaded earlier approved ToR 2 Uploaded scanned copy of covering letter Uploaded Covering Letter 3 Uploaded Pre-Feasibility report(PFR) Uploaded DPR 4 Uploaded additional attachments (only Uploaded copy of Form-1 single pdf file)
(V) Undertaking
13
Annexure – I : 10 km radius topo map
14
Annexure II : Brief Summary of Project Kirthai HEP, Stage – I: Overview The need for the Kirthai HEP, Stage-I, installed capacity 390 MW, in the lower reach of the Chenab Basin, which stores 10360 MW power potential being 85.7% of the total hydropower potential of the state, has therefore been considered in context of power shortage in the Northern region in general and in the country as whole. The project has been conceptualized as a run-of-the-river under the ambitions cascading development programme of hydropower in the Chenab basin It envisages utilization of river water through a gross / design head of 111.00 m and 108.53 m respectively for generation of annual energy of 1058.56 GWh at 90% dependability, through an underground powerhouse (240MW) to be located on the left bank of the Chenab near Gulabgarh. The updation of the earlier DPR prepared by CWC was undertaken mainly because the water availability studies in the earlier DPR was based on discharge data upto 2003 while in the present case it has been extended upto 2010 with the result that the installed capacity is increased from 240 MW to 390 MW and consequently the power generation in 90% dependable year has substantially increased from 1058.56 GWh to 1503.93 GWh. The reservoir FRL has been fixed at El 1895 masl from the consideration of submergence alone. The Minimum Draw down Level (MDDL) has been estimated at El 1887.59 masl, from consideration of the diurnal storage of 3.00 MCM, available between the proposed FRL and MDDL, to be adequate for daily peaking operation of the station for about 4 hours in a block. The proposed layout (modified due to updation) of the adopted alternative of the project and design of civil engineering structures have been so carried out as to utilize the hydro power potential optimally. The project, proposed to be completed in seven years’ time frame, shall require 1200 persons including professionals, technical, skilled and unskilled labours during the peak construction stage. . The main components of the proposed project layout are: ➢ A 165-m high concrete gravity dam (from the deepest foundation level) located on River Chenab at Latitude 3310’43” N and longitude 7548’26” E. ➢ 4 nos. of Orfice type spillways and 2 nos of high level spillway are provided to pass a flood of 9140 cumec discharge at crest level 1874.00 and 1880.00m respectively. ➢ 1 no. head race tunnel of 10.5m diameter on the left bank from intake structure and 1 no. intake for auxiliary power house located at the right bank. ➢ Headrace tunnel ends in a vertical shaft of 10.5m diameter. A horizontal tunnel of diameter 10.5m diameter upto manifold and branched into 4 nos. Unit pressure Shaft feeding main powerhouse unit (4 X 95 MW). ➢ 1 no. surface penstock for auxiliary power house of 10MW on right bank from Dam Non-overflow block No.10, for rated head of 108.53m and the design discharge is 9.5 cumec. ➢ A 20m wide cavity housing 4 units each of 95MW, with service bay at left and control room at right has been provided in the underground power house. A 250-ton capacity crane is provided, which will move in both directions. ➢ A 14m wide Transformer hall cavern to accommodate single-phase transformers and GIS. 5-ton capacity crane.
The general layout plan of the project is shown in Figure 1.1 below.
15
Figure 1.1 : General Layout Plan of the Project
16
No.J-120LU 6 I 2OOB -IA-I Ministry of Environment & Forests Government of India (IA-I Division) Paryavan Bhavan CGO.Complex, Lodi Road New Delhi - 110 003
Date: 10th June, 2013
To, The Chief Engineer CI&DWing,Jammu J&D Power development Corporation Khullar Market Sec-3 Extion Trikuta Nagar Jammu - 180 012
Subject Kifthai Stage-I HEP (390 MW) Project in Kishtwar District of Jammu & Kashmir by M/s. J&K Power Development Corporation - for Scoping/TOR - regarding. Sir,
This is with reference to your letter no. CI&D/ 537-Vllll2867-6g dated 25.L0.2012 and 6.11.2012 on the above mentioned subject.
2. It is noted that the project envisages construction of a 122 m high concrete gravity dam across river Chenab near Gulabgarh village to generate 390 MW of hydropower. This is a run-of-the-river scheme. Total land requirement is about 290 ha, out of which 160 ha is forest land, 80 ha is revenue land and 50 ha is private land. Total submergence area is about 210 ha. (Of which 160 ha is forest land). An underground powerhouse is proposed with 4 units of 95 MW each + 10 MW dam-toe powerhouse to facilitate to release environmental flow. Total cost of the project is about Rs. 3126.59 Crores.
3. The proposal was considered by Environment Appraisal Committee (EAC) for River Valley and- Hydroelectric Projects in its meeting held on L-znd February, 2013. The comments and obseruations of EAC on the proposal may be seen in the minutes of the meeting, which are available on the web-site of this Ministry.
4. Based on recommendations of the EAC, the Ministry of Environment & Forests hereby accords clearance for pre-construction activities at the proposed site as per the provisions of the Environmental Impact Assessment Notification, 2006 and subsequent amendment, 2009 along with the following Terms of Reference (TOR) for preparation of EIA/EMP report. The EIA/EMP report should contain the information in accordance with provisions & stipulations as given in the Annexure-I. While preparing the EIA/EMP report prevailing norms should be followed with respect to environmental flows and muck disposal sites and other aspects along with the following additional TOR:
. Environmental Evaluation: details of the environmental evaluation should be given and details of forest land/flora and fauna have to be presented in the EIA repoft. ' Detailed site specific seismological study be carried-out and geo-morphological mapping should also be done for project area. Power potential ' study with respect to 10 daily discharge in 90o/o dependable year should be carried-out o A site specific study may be carried-out for establishing the proper environmentat flow release during monsoon, non-monsoon and lean minths.'Release of minimum environmental flow must mimic the pre-dam flow pattern of the river for sustaininj the aquatic bio-diversity together with downstream user need and accordingly, water withdrawal for power generation is to be regulated. The minimum environmental flow release should be 2Oo/o of the average o:f + lean months of 90o/o dependable year; 20-30o/o of.the average gOoh flows of dependable year during non-lean & non- monsoon period and 30o/o of the average flows of grio/o depenlable year Ouring monsoon months. 5' The consultant engaged for preparation of EIA/EMP report has to be registered with of India (QCI)/NABET Quality-Council under the scheme of Accreditation & Registration of MoEF. This is a pre-requisite.
6' Consultants shall include a "Ceftificate" in EIA/EMp report regarding portion prepared of FIA/eyp by them and data provided by other org;irufin(s)/ laboratories including status of approval of such laboratories.
7 The draft ' EIA/EMP report prepared as per the above Terms of References should submitted be to the State Pollution Control Board / Committee concerned for conducting public Hearing -. r ' --"- /consultation as per the provisions stipulated in EIA Notification of 2006. B' All issues discussed in the Public Hearing/Consultations should be addressed and incorporated in the EIA/EMP Repoft. Final ffniiUp report should be submitted to the Ministry for Environmental Clearance only after incorporating these issues. 9' The TOR will remain valid for a period of 2 years from the date of issue of this letter for submission of EIA/EMP report along with public consultation. In case 10' of any change in the S.cope of the Project such as capacity enhancement, shifting of dam site/powerhouse and change in subm*g.n." etc., fresh scoping clearance has to be obtained by the project proponent. Information pertaining 11' to Corporate Environmental Responsibility and Environmental be provided - in the EIA/EMP ?9ltl-19.5.20t2. -shall Repoft ui p.rr-' t'nis 'uinistry,s ""'--'' circutar dated t2. This has approval of the Competent Authority.
Yours faithfully,
(B.B.Barman) Director Copy to:
1. The Secretary. Ministry of Power, Shram Shaffii, Bhawan, Rafl Marg, New Delhi-l 2. The Adviser (Power), ilanning Commission, Yojna Bhawan, New Delhi-110 001' 3. The principal S".r.[iry (MPP & Power), Government of Jammu & Kashmir, Srinagar. +. fn. Secrelary, Depaftmlnt of Environment, Government of Jammu & Kashmir, Srinagar. 5. Chief Engineer, Pioject Appraisal Directorate, Central Electricity Authority, Sewa Bhawan, R.K. Puram, New Delhi- 110 066. 6. The Regional Office, Ministry of Environment & Forest, Chandigarh. Bhavan, 7. The UJmUer Secretary, Jammu & Kashmir State Pollution Control Board, Parivesh Gladni, Transport Nagar, Nanrual, Jammu-180 006. 8. NIC Cell - with a tequest to upload in MoEF's website 9. PS to JS (AT)/Director (IA-I)/PVSRao 10 Guard file. (B.B.Barman) Director
E.:\m AJ pootsrls and variations in the river habitats like rapids' pool.:'-side * Different riverine ot tluy etc'3:"1:Tt;tiol.r.aunder need to,be cov substratum -#;#;, r".r.r,-ir"ia"rJ, itr..t"ay. "*oltilt i3! to in the area' baseline data with respect the present status of environment (flora I-o know *ff'lana and biology & biodiversity components air, w1ter, radius of environmental ,tutls-"i*""it", ,fr*fa u" torft"tJd with 10 km & fauna), wildlife,'ro"io-.r**ic power house site' The air quality project/site i''-i'* tite and the main components of the & ecologically tocations which are environmentally are to b.;""it;;;-ui ,utt' 3 seasons and noise stodiesstrourd be corlected for in the study area of more sensitive p"rt lleil;il rttt ttoav area should comprise (pre-Monsooo, Mo.ir""r-*a irrorirl|ir..*"o. the following: site' * Catchment area up-to the dam of area faring within 10 km direct impact area shourd comprise : illffJ::il'"In g under submergence and area periphery or r.r"ril;;; **it radius from the (TRT) meets the river' point *t'"i"'Tail Race Tunnel downstream of dam upto the of Tail Race Tunnel (TRT)' e Downstrer* rp;;t;; fro* tip
t4! lletails of the Methodolow with details of number for collection of base line data along fhe methodology followed intfuO"a] Study area should be and their locations io tf"'"'ou| tt"'fJ1" on ,if samples surrrpting sites should be depicted the upproprrul";4" *up. ilemarcated properly on fo'Jti tiutsification' Champion and map for each par-ameter with-p,opt''i""g;*-rot be followed' Lin iiqoS) classification should
i{} get reasonable idea of the should be adequate- to a i.he numbe, or ,u*pting locations principles should be the flora *Jft*" 1r" S*dtg .Jiversity and other .Iiiri6u,", of I*'*:":",:::t::*H study area (larger arel rt orrl*rr'#'ilrg"t (e'g' eastern size of the *o*n riom"til-utt secondary sources ;lflr'#'".,'j::J#"it',il.'1H,i*,"i'rt""fa-i"" sampling locations ,it., u of l,limalayan *a toti'uttitua" '*g"t'u*Uo owing to higher diversitY)' preferably.on.a GIS domain' .rhe divided in grids of 5km x - entire area should be ;ltt"if;-5k* samplini of which half 2,ohof the grids should?.;;;;i^c; such as There after incruding project.components the directly affected ;; area should be in rJmaining in the rest of the tunnel, i'*f'Lt'j and the reservoir, a*, poi"rfr*se, chosen location' ,"arrr'r"rr" project.compo".o,rl. ,.it such (areas of influencli| fi ffi flora/transects in case of and number of samplirs ,ri;;'i;.!.-i.ra.1tl"';;;;f (graphs and the size and the ietails of the same must be decided by ipecies ;;;il;s EIA report' fauna) form) shourd be provided in the of species in u tuiJut"o area cumurative number overlapping with the study on the edges *1v * u. .o*pt"t"ry some of the grids *rd ior r.lecting 25o/o of the However these should ue cou*ed (i'e' it has boundaries. come"onrid.od o"fut a decimal number ,The oi grids to be surveyed may grids. ,r*u., il. i"""aed to the next whole number' an integrdl u,a u tui ilrur'p^rtl *hir;';;;ia
Soil Characteristics
. Soil classificatioEr, physical parameters (viz., texture, porosity, bulk density and water holding capacity) and chemical parameters (viz. pH, electrical conductiviqr, magnesium, calcium, total alkalinity, chlorides, sodium, potassium, organic carbon, available potassium, available phosphorus, SAR, nitrogen and salinity, etc.) (6locations).
Remote sensing and GIS Studies
o Generation of thematic maps viz., slope map, drainage map, soil map, land use and land cover map, etc. Based on these, thematic maps, an erosion intensity map should be prepared. Water Quality r History of the ground water table fluctuation in the study area. o Water quality . for both surface water and ground water for (i) Physical parameters '(pH, temperature, electrical conductivity, TSS); (ii) Chemi.ut parameters (Alkalinity, Hardness, BOD, COD, NO2, POa, CI, SOa, Na, K, Cq Mg, Silica, Oil ' & Grease, phenolic compounds, residual sodium carbonate); (iii) Bacteriological parameter (MPN, Total coliform) and (iv) Heavy Metals (Pb, As, Hg, cd, cr-6, total Cr, Cu,Zn, Fe) (6locations). o Delineation of sub and micro-watersheds, their locations and extent based on the All India Soil and Land Use Survey of India (AISLUS), Department of Agriculture, Government of India. Erosion levels in each micro-watershed and prioritization of micro-watershed through silt yield index (SYI) method of AISLUS. B Water Environment & Hydrolory ' Hydro-Meteorology of the project viz. precipitation (snowfall, rainfall), temperature, relative humidity, etc. Hy&o-meteorological studies in the catchment area should be established along-with real time telemetry and data acquisition system for inflows monitoring. . Run off, discharge, water availability for the project, sedimentation rate, etc. . Basin characteristic'S o Catastrophic events like cloud bursts and flash floods, if any, should be documented. . For estimation of Sedimentation Rate, direct sampling of river flow is to be done during the EIA study. The study should be conducted for minimum one year. Actual silt flow rate to be expressed in ha-m km2 year-I. o Set up a G&D monitoring station and a few rain gauge stations in the catchment area for collecting data during the investigation. o Flow series, l0 daily with 90%, 75Yo and50% dependable years discharges. o Information on the lO-daily flow basis for the 90 per cent dependable year the flow intercepted at the dam, the flow diverted to the power. house and the spill comprising the environmental flow and additional flow towards downstream of the dam for the project may be given. t The minimum environmental flow shall be 20o/o of the flow of four consecutive lean months of 90% dependable year, 30Yo of the average monsoon flow. The flow for remaining months shal,l be in between 2o-30yo, depending on the site -,,,.- "' . specific requirements. A site'specific study shall be carried out by an expert . , organization , * . Hydrological studies/data as approved by CWC shall be utilized in the p.repalatign -.:: of g14ffiNap report. Actual hydrological annual yield may also be given in the report. . SeAimentation data available with CWC may be used to find out the loss in storage over the years. o A minimum of 1 km distance from the tip of the reservoir to the tail race should be maintained between upstream and downstream projects. C BiologicalEnvironment Besides primary studies, review of secondary data/literature published for project area on flora & fauna including RET species shall be reported in EIA/EMP report. Flora o Characterization of forest types (as per Champion and Seth method) in the study area and extent of each forest type as per the Forest Working Plan. o Documentation of all plant species i.e. Angiosperm, Gymnosperun, Pteriodophytes, Bryophytes (all groups). o General vegetation profile and floral diversity covering all groups of flora including lichens and orchids. A species wise list may be provided. . Assessment of plant species with respect to dominance, density, frequency, abundance, diversity index, similarity index, importance value index (IVD , Shannon Weiner index etc. of the species to be provided. Methodology used for calculating various diversity indices along with details of locations of quadrates, size of quadrates etc. to be reported within the study area in different ecosystems. o Existence of National park, Sanctuary, Biosphere Reserve etc in the study atea, if , any, should be detailed. i . Economically important species like medicinal plants, timber, fuel wood etc. o Details of;endemic species found in the project area. o Flora under RET categories should be documented using International Union for the Conservation of Nature and Natural Resources (IUCN) criteria and Botanical Survey of India's Red Data list along-with economic significance. Species diversity curye for RET species should be given. Cropping pattem and Horticultural Practices in the study area.
Fauna: o Fauna study and inventorisation should be carried out for all groups of animals in the study area. Their present status alongwith Schedule of the species. . Documentation of fauna plankton (phyto and zooplankton), periphyton, benthos and fish should be done and analysed. o Information (authenticated) on Avi-fauna and wildlife in the study area. o Status of avifauna their resident/ migratory/ passage migrants etc. Documentation of butterflies, if any, found in the area. o Details of endemic species found in the project area. . RET species-voucher specimens should be collected along-with GPS readings to facilitate rehabilitation. RET.faunal species to be classified as per IUCN Red Data list and as per different schedule of Indian Wildlife (Protection) Act, 1972. o Existence of baniers and corridors, if any, for wild animals. . Compensatory afforestation to compensate the green belt area that will be rem&ed, if hy, as part of the proposed project development and loss of biodiversity. . Collection of primary data on agricultural activity, crop and their productivity arfd ini gation facilities components' . Foi categorization of sub-catchrnent into various erosion classes and for the consequent CAT plan, the entire catchment (Indian Portion) is to be considered and not only the directly the draining catchment. D Aquatic Ecolory o Documentation of aquatic fauna like macro-invertebrates, zooplankton, phytoplantktons, benthos etc. . Fish and fisheries, their migration and breeding grounds . Fish diversity composition and maximum length & weight of the measured populations to be studies for estimation of environmental flow. o Consenation status of aquatic fauna. . Sampling for aquatic ecology and fisheries and fisheries must be conducted during tf,r"" r"ulons - Pre-monsoon (summer), monsbon and winter. Sizes (length & weight) of important fish species need to be collected and breeding and feedlng grourrd. should also be identified along the project site or in vicinity. E Socio-Economic e Collection of baseline data on human settlements, health status of the community and existing infrastructure facilities for social welfare including sources of livelihood, job opportunities and safety and security of workers and sunoundings population. o Collection of information with respect to social awareness about the developmental activity in the area and social welfare measures existing and proposed by project ProPonent. . o Collection of information on sensitive habitat of historical, cultural and religious and ecological imPortance. . The socio-economic survey/ profile within 10 km of the study area for demographic profile; Economii Structure; Developmental Profile; Agricultural Practices; Infrastructure, education facilities; health and sanitation facilities; available communication network etc. o Documentation of demographic, Ethnographic, Economic Structure and development profile of the area. o Information on Agricultural Practices, Cultural and aesthetic sites, Infrastructure facilities etc. o Information on the deperidence of the local people on minor forest produce and their cattle grazingrights in the forest land. o List of all the Project Affected Famiiies with their ntune, age, educational qualification, family size, sex, religion, caste, Sources of income, land & house holdings, other properties, occupation, source of income, house/land to be acquired for the project and house/land left with the family, any other property, possession of cattle, type of house etc. . Special attention has to be given to vulnerable groups like women, aged persons eic. and to any ethnic/indigenou3 groups that are getting affected by the project. The adverse impact due to the proposed project should be assessed and effective - mitigation steps to abate these impacts should be described. Air Environment o Changes in ambient and ground level concentrations due to total emissions from point, line and area sources. o Effect on soil, material, vegetation and human health. o Impact of emissions from DG set used for power during the consfuction, if any, on air environment. o Pollution due to fuel combustion in equipments and vehicles . Fugitive emissions from various sources Water Environment r Changes in surface and ground water quality o Steps to develop pisci-culture and recreational facilities o Changes in hydraulic regime and downstream flow. o Water pollution due to disposal of sewage o water pollution from labour colonies/ camps and washing equipment. Land Environment
o Adverse impact on land stability, catchment of soil erosion, reservoir sedimentation and spring flow (if any) (a) due to considerable road construction / widening activity (b) interference of reservoir with the inflowing stream (c) blasting for commissioning of HRT, TRT and some other structures. . Changes in land use / land cover and drainage pattern o Immigration of labour population o Quarrying operation and muck disposal . Changes in land quality including effects of waste disposal . River bank and their stability o Impact due to submergence. Biological Environment
o Impact on forests, flora, fauna including wildlife, migratory avi-faun4 rare and endangered species, medicinal plants etc. .. Pressure on existing natural resources o Deforestation and disturbance to wildlife, habitat fragmentation and wild animal's migratory corridors o Compensatory afforestation-identification of suitable native tree species for . compensatory afforestation and green belt. o Impact on fish migration and habitat degradation due to decreased flow of water o Impact on breeding and nesting grounds of animals and fish. Socio-economic aspects
o Impact on local community including demographic profiler . o Impact on socio-economic status o Impact on economic status. o Impact on human health due to water / vector borne disease o Impact on increase traffic o Impact on Holy Places and Tounsm r Impacts of blasting activity during project construction which generally destabiiize the land mass and leads to landslides, damage to properties and drfing up of natural springs and cause noise population will be studies. Proper record shall be maintained of the baseline information in the post project period. r Positive and negative impacts likely to be accrued due to the project are listed.
(fi! Environmental Management Plans
i. Catchment Area Treatment (CAT) Plan should be prepared micro-watershed wise. Identification of free draining/ directly draining catchment based upon Remote Sensing and Geographical Information System (GIS) methodolory and Sediment iield tndex (SYf *ithod of AISLUS, Deptt. of Agriculture, Govt. of India coupled with ground survey. Areas or watersheds falling under 'very severe' and 'severe' erosion categories should be provided and pl,.quired to be treated. Both biological as well as engineering measures should be proposed in consultation with State Forest Department for areas requiring treatment. Year-wise schedule of work and monetary allocation should be provided. Mitigation measures to check shifting cultivation in the catchment area with provision for alternative and better agricuttural practices should be included.
i: . Compensatory Afforestation shall be prepared by the State Forest Depbrtment in lieu of the forest land proposed to be diverted for construction of the project as per the Forest (Conservation) Act, 1980. Choice of plants for afforestation should include native and RET species, if any. This will be a part of the forest clearance proposal.
.! Biodiversity and Wildlife Conservation and Management Plan for the conservation and preservation of rare, .endangered or endemic floral/faunal species or some National Parl
i. Resettlement and Rehabilitation Plan neededto be prepared on the basis of findings of the socio-economic survey coupled with the outcome of public consultation held. The R&R package shall be prepared after consultation with the representatives of the project affected families and the State Government. Detailed budgetary estimates are to be provided. Resettlements site should be identified. The plan will also incorporate community development strategies.
6. Green Belt Development PIan along the periphery of the reservoir, approach roads around the colonies and other project components, local plant species must be suggested with physical and financial details. A layout map showing the proposed sites for developing the green belt should be prepared.
7. Reservoir Rim Treatment.Plan for stabilization of land slide / Iand slip zones, if any, around the reservoir periphery is to be prepared based on detailed survey of geology of the reservoir rim area. Suitable engineering and biological measures for treatment of identified slip zones to \: be suggested with physical and financial ichedule. Layout map showing the landslidellandslip zones shall be prepared and appended in the chapter. : '
8. Mick Disposal PIan suitable sites for dumping of excavated materials should be identified in consultation with State Pollution Control Board and State Forest Department. All muck disposal sites should be minimum 30 m away from the HFL of river. The quantity of muck to generated be and the quantity of muck proposed to be utilized shali be calculated in consultation with the project authorities. Details of each dumping site viz. area, capacity, total quantity of muck th^at cal be dumped etc. should be worked out and discussed in the plan. ftan for rehabilitation of muck disposal sites should also be given. The L-section / cross section of muck disposal site-s and approach roads should be given. The plan shall have physical and financial details of the measures proposed. Layout map showing the dumping sites vis-d-vis other project components will be prepared and appended in the chipter. Restoration Plan 9' for Quarry Sites and landscaping of colony areas, working areas, roads etc. Details the of coarse/fine aggregatelclay etc. requiied for construction of the project and the quarries/river lock/rclay shoal sites identified for ihe project should be discussedal6ng-with the Engineering and Biological measures proposed for theii restoration with physical and financial details. Layout map showing quarry sites vis-i-vis other project componerts, should be prepared. l0' Study of Design Earthquake Parameters: A site specific study of earthquake parameters should be done. Results of the site s-pecific earthquake design parameters rfroufA be approved by National Committee of Seismic Design Paramltery Central- Water Commission 6nttSon;, New Delhi.
I l Dam Break ' Analysis and Disaster Management Plan The outputs of dam break model should be illustrateg.*it! appropriate graphs and maps clearly bringing out the impact of Dam Break scenario. To identify inundation areas, population and rt.u"t,ri"r'iikely to be affected due to catastrophic floods in the event of dam failure. DMP will be prepared *itn tn" help of Dam Break Analysis. Maximum water level that would be attained' at various pointi on the downstream in case of dam break will be marked on a detailed contour map of the downstream area, to show the extent of inundation. The action plan will include Emergency Action and Minagemerit ply including measures like preventive action notification, #arning procedure and aetion plan for co-ordination with varioui authorities. 12' Water, Air and Noise Management Plans to be implemented during construction and post- construction periods. 13' Public Health Delivery PIan including the -stutrsprovisions of drinking water supply for local population shall be in the EIA/EMP Report. of the existinglmedical facilities in the project'area shall be discussed. Possibilities of strengthening of e"xisting medical facilities, construction of new medical infrastructure etc. will be explored after asseslsing the need of the labour force and local populace.
14. Labour Management plan for their Health and Safety. 15' Sanitation and Solid -waste management plan for domestic waste from colonies and labour camps etc. l6' Local Area I)evelopment PIan to be formulated in consultation with the Revenue officials Village Pancahayats. Appropriate ''',,-.. 1nd schemes shall'be prepared under EMp for the Local Area "''"Development Plan with sufficient financial provisions. :::::-
l7' Environmental safeguards during construction activities including Road Construction. 18' Energy Conservation Measures for the work force during construction with physical and financial details. Alternatives will be proposed for the laboui force so that the exploitation of the natural resource (wood) for the domesiic and commercial use is curbed.
KIRTHAI-I HEP (4x95+1x10MW), J&K DETAILED PROJECT REPORT
VOLUME - I EXECUTIVE SUMMARY December 2012
J&K State Power Development Corporation Synergics Hydro (India) Pvt. Ltd.
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
CONTENT LIST
1.1 PROJECT AREA ...... 9
1.2 THE PROJECT ...... 9
1.3 CLIMATE ...... 10
1.4 HYDROLOGY ...... 10
1.5 INDUS WATER TREATY ...... 12
1.6 POWER STUDIES ...... 13
1.7 REGIONAL GEOLOGY ...... 13
1.8 PROJECT GEOLOGY ...... 14
1.8.1 DAM ...... 14
1.8.2 POWER HOUSE COMPLEX ...... 14
1.9 PROJECT DESIGN FEATURES ...... 15
1.9.1 DAM AND APPURTENANT WORKS ...... 15
1.9.2 INTAKE ...... 17
1.9.3 WATER CONDUCTOR SYSTEM ...... 18
1.9.4 POWERHOUSE COMPLEX ...... 18
1.9.5 OUTDOOR SWITCHYARD ...... 19
1.9.6 AUXILIARY POWER PLANT ...... 20
1.9.7 FURTHER STUDIES ...... 21
1.10 ENVIRONMENTAL EVALUATION ...... 21
1.11 INFRASTRUCTURE WORKS ...... 21
1.12 CONSTRUCTION PLANNING AND MANAGEMENT ...... 22
1.13 ESTIMATED COST ...... 23
1.14 ENERGY GENERATION AND TARRIF ...... 23
1.15 RECOMENDATION ...... 23
1 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
SALIENT FEATURES A. LOCATION
Country India
State Jammu & Kashmir
River Chenab
Longitude 760-10’-10”E
Latitude 330-15’-33”N
B. HYDROLOGY
Catchment Area 8530 sq Km
Average Annual Rain Fall 750 mm
Average Annual Yield 10135 M Cum
90% Dependable Annual Yield 7775.80 M Cum
75% Dependable Annual Yield 9329.40 M Cum
Design Flood (Probable Maximum Flood) 9140.0 Cumecs
Annual sediments Load 1.23 mm/Year
C. RESERVOIR
Full Reservoir level 1895 m
Reservoir Area 199.50 Ha
Gross Capacity 104.50 M Cum
Minimum Draw Down Level 1887.50 m
Dead Storage 91.5 MCM
Maximum Water Level 1895 m
Live Storage 13.0 MCM
Reservoir Stretch 9.50 Km
2 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
D. DAM Type Gravity Dam Roller Compacted and Conventional concrete combined River Bed level 1778.0 m Top of dam 1900.0 m Height above River Bed Level 122.0 m Height above Deepest Foundation Level 165.0 m Length of top of Dam 250.5 m a) Over Flow section 108.0 m b) Non Overflow Section 142.5 m Non over flow section a) Upstream Slope 0.3H:1V b) Downstream section 0.9H:1V c) Top width 8.0 m Over flow section with breast wall a) Upstream Slope 0.2H:1V b) Downstream Slope 1H:1V c) Crest level 1874.0 d) Height of Breast wall 13.0 m e) Height of opening 13.0 m f) Type of Gates Radial Gates g) No of gates 4 h) Size of Gates 12.0m widthx13.5 m High i) Level of stilling basin 1768.0 j) Length of Stilling Basin 137.0 m Over flow section without breast wall a) Upstream Slope 0.2H:1V b) Downstream Slope 1H:1V c) Crest level 1880.0 d) Type of Gates Radial Gates e) No of gates 2 f) Size of Gates 12.0m widthx15.5 m High g) Level of stilling basin 1766.0 h) Length of Stilling Basin 132.48 m 12 m x 15.5 m approx in Stoplog gate pieces (One set)
3 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
E. DIVERSION ARRANGEMENT
Number of Concrete Lined Tunnels 1 Design Discharge 2000 cumec Diameter 13 m Diversion Tunnel Inlet Invert level 1783 Diversion Tunnel Outlet Invert level 1779 Length 566 m Top level of upstream coffer Dam 1818 m Top Level of Downstream Coffer Dam 1794 m 11.0 m widthx11.0 m Size of gate High
F.1 MAIN INTAKE Location In a pool created on left abutment 100 m U/S of dam axis Type Semi Circular Type with Bellmouth Entry Crest Level at Intake Pool 1883.00 m Size of Rectangular Opening at Intake Pool 4Nos. 5.70(W) x 12.5(H) m Size of Rectangular Bellmouth Opening 14.68(W) x 17.44(H) m Invert Elevation at Bellmouth Entry 1866.75 m Top of Gate Operation Deck 1900.00 m
Gates & Openings Gates at Intake Pool 4Nos. 5.70(W) x 12.5(H) m Gates at Bellmouth Entry 1Nos., 10.5(W) x 10.5(H) m Trash Rack in pannels in semi circular case
F. 2 AUXILIARY INTAKE Straight type intake with Type trash rack in right non overflow dam Nos. & Size 1Nos., 2.75(W) x 2.75(H) m Design Discharge 9.5 Cumec Centre Line of Opening 1882.00 m
4 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
G. Water conductor for Main Power House HEAD RACE TUNNEL (El.-1871.53) Number 1No Shape & Size 10.5m Ø, Circular Finished, Type Concrete Lined Pressure Tunnel Length 160.0 m Offtake Invert Level 1866.75m Design Discharge 385.50 Cumecs VERTICAL SHAFT Number 1Nos. Shape & Size 10.5m Ø, Circular Finished Type Concrete Lined Length 90.0m Discharge 385.50 Cumecs HEAD RACE TUNNEL (El.-1781.39) Number 1Nos. Shape & Size 10.5m Ø, Circular Finished Type Concrete Lined Length 75.0m Discharge 385.50 Cumecs UNIT PRESSURE SHAFT Number 4 Nos. Shape & Size 4.40m Ø, Circular Finished Type Steel Lined , Horizontal Length Unit PS-1 50.20 m Unit PS-2 42.70 m Unit PS-3 35.15 m Unit PS-4 27.55 m Discharge 96.375 Cumecs Each
5 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
H. PENSTOCK FOR AUXILIARY POWERHOUSE Type Surface Nos. 1Nos. Diameter 1.75m Length 328.0m Discharge 9.5Cumecs
I.1 MAIN POWER HOUSE Type Underground Size (Including Service bay & Control Room) 116.5(l)m x 20(w)m x 43.50(h)m Nos. & Type of M/c Installed 4 Nos., Francis Type Installed Capacity 380 (4 x 95) MW Service Bay Elevation 1789.50 m Generator Floor Elevation 1785.00 m Turbine Floor Elevation 1780.40 m Centre Line of Penstock 1777.80 m MIV Floor Elevation 1773.00 m Draft Tube Invert Elevation 1768.50 m Power House Crown Elevation 1810.00 m EOT Crane Beam Elevation 1799.50 m
I.2 TRANSFORMER CAVERN Type Underground Size 109.30 m x 14 m x 20.60 m Transformer Floor level 1789.50 m GIS Floor level 1797.75 m EOT Crane beam level 1805.50 m Crown level of machine hall cavern 1810.10 m Distance Between P.H. and T. Cavern 40.0 m Bus Ducts from machine hall 4Nos., 4(w) m x 5.0(h) m, D-Shaped Each Cable Tunnel to Pothead 294.55m Long 5.0m Ø, D- Shaped
6 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
J. TAIL RACE TUNNEL Type & Length Concrete Lined Free Flow Tunnel, 180.0 m long Nos., Size & Shape 1Nos., 10.50 Øm, Circular Finished, MHS Excavated Length 165.45 m Minimum TWL 1781.55 m Maximum TWL 1799.00 m Normal TWL 1784.00 m Invert Level at Outlet Portal 1776.50m Unit TRT's 4Nos., 84.0m Long, 5.55m Ø , Circular Tail End Gate 1Nos., 10.50(w) x 10.50(h) m Draft Tube Gate Operation Gallery Size & Shape 66.55 m Long, 10m Ø, Modified D-Shaped Invert 1801.00 m Nos. & Size of Draft tube Gate 4 Nos., Each 5.5(w)x 5.50 (h)
K. AUXILIARY POWER HOUSE Type Surface Size (Including Service bay & Control Room) 29.8 (L) m x 13.00(W) m x 33.87(H) m Type of M/c & Installed Capacity Francis Type, 10 (1x10) MW Service Bay Elevation 1785.25 m Generator Floor Elevation 1781.85 m Turbine Floor Elevation 1779.15 m Centre Line Elevation of Penstock 1776.35 m MIV Floor Elevation 1774.00 m Draft Tube Invert Elevation 1771.66 m EOT Crane Beam Elevation 1793.25 m Power House Roof Top Elevation 1803.00 m Deepest Excavated Elevation 1769.13 m
7 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
L. POWER INSTALLATION Centre line of turbines 1777.80 m Net Rated Head 108.53 m Main P.H. 380MW (4x95MW) + Installed Capacity Auxiliary P.H. 10MW (1x10MW) Type of Turbines Vertical Francis
M. ENERGY GENERATION and PROJECT COST
Annual Energy generation (90% Dependability ) 1503.93 MU Design energy 1460.87 MU Construction Period 60 Months Total Cost of project 3034.04 Cr. Cost of project (Rs.Per MW) 7.78 Cr. Levelised Tariff (Rs. Per Unit) 3.88
8 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
EXECUTIVE SUMMARY
1.1 PROJECT AREA
The Project envisages construction of a Dam (165m above foundation level), intake structure on left abutment, about 0.25 km long water conductor system, an underground power house with an installed capacity of 380 MW and a tail race tunnel. The Dam is located at a distance of about 275m upstream of existing Bailey bridge near village Gulabgarh in kishtwar district of Jammu& Kashmir, about 155 km from Udhampur. The location of the project is shown in Drawing No.-135_00_00_001.
The nearest rail head available to the project is Northern Railway board gauge railway station at Udhampur which is about 75 km from Kishtwar. Kishtwar is connected to the project site through an existing 25 km double lane black topped road up to Galhr.
1.2 THE PROJECT
¾ Kirthai-I HEP is a run-of-river scheme on River Chenab near Gulabgarh village in Kishtwar District of J&K, Different alternative sites and project layouts to utilize potential of river Chenab at this site were studied by CWC & other central agencies such as CEA & GSI and a DPR for Kirthai –I HEP was prepared by CWC in 1993. These are briefly described in chapter 10 of Volume-I.The proposed project layout is as a result of updation of CWC DPR. The main components of the proposed project layout are: ¾ A 165 m high concrete gravity dam (from the deepest foundation level) located on River Chenab at Latitude 33°10’43” N and longitude 75°48’26” E. ¾ 4 nos. of Orfice type spillways and 2 nos of high level spillway are provided to pass a flood of 9140 cumec discharge at crest level 1874.00 and 1880.00m respectively. ¾ 1 no. head race tunnel of 10.5m diameter on the left bank from intake structure and 1 no. intake for auxiliary power house located at the right bank. ¾ Head race tunnel ends in a vertical shaft of 10.5m diameter. A horizontal tunnel of diameter 10.5m diameter upto manifold and branched into 4 nos. Unit pressure Shaft feeding main power house unit. ¾ 1 no. surface penstock for auxiliary power house of 10MW on right bank from Dam Non overflow block No.10.
9 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
¾ A 20m wide cavity housing 4 units each of 95MW, with service bay at left and control room at right has been provided in the underground power house. A 250 ton capacity crane is provided, which will move in both directions. ¾ Transformer hall cavern is 14m wide, which will accommodate single phase transformers and GIS. 5 ton capacity crane is provided to carry heavy GIS and other electrical parts ¾ The reservoir created by the dam located near the Gulabgarh village will operate between FRL 1895.00 m a.m.s.l and MDDL 1887.58 m a.m.s.l. The installed capacity of the main power house will be 380 MW (4 x 95 MW). The rated head of the scheme is 108.53 m and the nominal discharge is 96.375 m3/s for each unit of 95 MW. The rated head for auxiliary power plant is 108.53m and the design discharge is 9.5 m3/s . The auxiliary power plant will have an installed capacity of 10 MW. The design energy at 95% plant availability is 1460.87 GWh.
1.3 CLIMATE
The sources of runoff in the Chenab basin are both rain and snowmelt. From June to September, the basin is normally under the influence of southwest monsoons. Though total precipitation recorded in this season is around 30 % of the annual precipitation, extreme rainfall, and floods are experienced during this season. Severe floods are sometimes recorded during first fortnight of October also. The mean annual precipitation over the basin upto Kirthai-I dam site is around 750mm. The temperature data are available at three metereological stations namely Dhamkund, Sirshi, Tillar in the Chenab basin. Based on the temperature data at Tillar station (El.- 2128 m) in Chenab basin, the mean monthly maximum and minimum temperatures are 27.30C in June and -2.80C in the month of January respectively.
1.4 HYDROLOGY
The catchment area corresponding to dam site is about 8530 km2. Water availability studies have been carried based on the available 10-daily mean flows at Benzwar and Premnagar G & D sites. However, the available 10-daily mean flows at Arthal and Gulabgarh G & D sites were ignored in the water availability studies due to inconsistencies and due to availability of data for relatively shorter period at Gulabgarh.
The water availability studies in the original DPR (CWC-1993) were based on discharge data upto 1989. In this updated DPR the data is extended upto 2010.
10 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
The methodology adopted for development of long term flow series at Kirthai-I dam site is based on the transposition of derived 10-daily flow series at Benzwar through R-R correlation between observed 10-daily mean flows at Benzwar and Premnagar in catchment area ratio. The long term flow series at proposed dam site is given in Annexure-1 as approved from CWC vide letter- CWC U.O. NO. 1/40/2004/HYD (DSR)/355 dated 30th Dec 2011 utilized for power potential studies which resulted in an increase in the installed capacity from 240MW to 390 MW.
The Annual run-off in the Chenab river at the dam site varies in the study period from a minimum of 7508 MCM in the year 1997-98 to a maximum of 12543 MCM in the year 1973-74.The average run-off during the period is 10135 MCM.
The minimum 10-daily average flow of 30.69 cumecs was observed in 1st 10daily of March, 1979 while the maximum 10-daily average flow of 1685 cumecs was observed in June 11-20, 1973.
The 50% and 90% dependable years works out to 1989-99 and 2000-01 respectively. The total available flows at the diversion site are plotted as flow duration curve in Figure-1.
The 90% exceedence flow available in river is 49.7cumec, 75% is 62.4 cumec, 50% flow available in river is 128.5 cumec.
Flow duration curve at Kirthai-I dam site 1800 1600 1400 1200 1000 800 600 400
10-daily mean (in Cumecs) flows mean 10-daily 200 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 Exceedance Probability (%) Figure-1:Flow duration curve
The elevation- area-capacity curve of the reservoir is developed from the topographic survey and is given in Figure-2.
11 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
Elevation - Area-Capacity curve at Kirthai-I dam site Capacity (in Ha.m) 0 9500 9000 8500 8000 7500 7000 6500 6000 5500 5000 4500 4000 3500 3000 2500 2000 1500 1000 500 11500 11000 10500 10000 1905 1895 1885 1875 1865 1855 1845 1835 1825 Elevation, m 1815 1805 1795 1785 1775 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 Area (in Hac.) Original Elevation-Area Curve Original Elevation-Capacity Curve
Figure-2: Elevation –Area-Capacity curve at Kirthai-I dam site
The gross storage at FRL is (1895 masl) is 104.50 MCM. The dead storage at MDDL is (EL. 1887.5) is 91.50 MCM and live storage at MDDL is 13 MCM.
The design discharge for the project work out to as follows-
Flood discharge for river diversion (~Q25) non-monsoon flow 2000 m3/s
Probable Maximum Flood (PMF) for spillway design 9140 m3/s (7400 cumec in orginal DPR) For estimation of design flood (PMF) and diversion discharge reference ‘Çhapter -6 ‘Hydrology’ of the detailed project report (DPR) Volume-I may be refered. In this updated DPR, the diversion discharge and PMF have increased considerably from original DPR.
1.5 INDUS WATER TREATY
Kirthai-I HEP lies on the Chenab Main River in district Kishtwar, Jammu & Kashmir and is governed by the relevant provisions of “Indus Water Treaty 1960” (IWT) signed between India and Pakistan. The live storage has been kept as 13.00 Mm3 for daily peaking.
The IWT compliance has been discussed in Chapter 4 of the Volume – I: Main Report.
12 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
1.6 POWER STUDIES
In order to maximize the benefits of the project, the optimization of installed capacity has been carried out by studying incremental energy with increase in installed capacity for 90% dependable year and takes into account the following features:
The ecological release is considered as 9.5 m3/s.
The hydraulic average gross head has been considered with an average reservoir level corresponding to level as 2/3(FRL-MDDL) + MDDL and considering normal Tail Water Level. The full reservoir level (FRL) is at El.-1895m and Minimum drawdown level is at El.-1887.58 m. The FRL & MDDL were decided on the basis of optimization studies carried out in CWC DPR. These are adopted in this updated DPR as FRL could not be altered because of submergence. The normal tailwater level is at El.-1784m and minimum tailwater level (Min. TWL) is El.-1781.55m.
All the head losses including friction loss in water conductor system have been accounted for in arriving at net head which worked out as 108.53m. The combined efficiency factor for the electro-mechanical equipment is taken as 92.5%. The design energy for the project evaluation is considered as annual energy available in a 90% dependable year with 95% of plant availability. The summary of power studies is as follows:
Installed capacity (4 x 95 MW+10 MW) 390MW Rated head 108.53 m Rated discharge per unit in main power house 96.375 m3/s
Unrestricted energy in 90% dependable Year at installed 2130.6 GWh capacity. Energy generation in 90% dependable year at installed capacity 1503.93 GWh
Plant load factor in 90% dependable Year 44% Design energy in 90% dependable year with 95% plant 1460.87 GWH availability
1.7 REGIONAL GEOLOGY
The Chenab valley around Doda and Kishtwar regions represents a unique cross-section through Himalaya where the Lesser Himalayan rocks (LH) are exposed as thrust sheets as well as in a window, the Higher Himalayan Crystalline (HHC) as a large thrust sheet and
13 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
the structurally highest Tethys Himalayan rocks as nappes, i.e., Chamba and Kashmir Nappes..
1.8 PROJECT GEOLOGY
1.8.1 DAM
The large scale geological mapping has revealed that the project area is represented by rocks of quartz-mica schist belonging to Salkhala group (Precambrian). These rocks are thinly foliated and intersected by joints. The quartz mica schist at several places contains minute subhedral to euhedral crystals of garnet. Details are given in the Geology chapter V of volume-I and volume-V.
The dam abutments have been explored through three bore holes and three drifts. The three bore holes aggregated to 111.71 m in depth. The bore holes were specifically located where pocket of over burden were exposed. The core recovery from these bore holes varies from 63% to 100% and RQD ranges from fair to very good.From the drill core data the abutment conditions have been found to be fairly fresh to fresh at shallow depth. Weathered joints and thin weathered zones however, have been found to continue down to considerable depth. The bore hole data has not been able to establish the rock level in the river bed. However it has shown that depth of RBM in river bed is about 40m deep. Further investigations are in progress.
1.8.2 POWER HOUSE COMPLEX
The site for underground Power House on left bank, 170m downstream of the dam axis, has been explored through one 141.0m deep drill hole (GPH-2), inclined at 45o along longer axis of power house in S 65o W direction The drill core interpretations reveal that the hole has gone through quartz mica schists with quartz and quartzo felaspathic veins.The rock is garnetiferous between 30.85 and 92.20m depths. All through below 5.5 m depth core recovery is 100% and RQD is predominantly in good category (75% to 90%), indicating the bed rock to be in a sound state for underground excavations.Rough estimates reveal the Rock Mass Quality “Q”(Barton, 1974) to be around 2.86.The hole (GPH-2) could not reach upto the top of PH cavern. Hence further investigations through an exploratory drift in the cavern are in progress.
14 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
1.9 PROJECT DESIGN FEATURES
The updation of hydrology resulted in the increase in diversion discharge, spillway capacity, installed capacity, design discharge to power house. These aspects alongwith the provision for environmental releases neccessiated some changes in the layout of the scheme and the design aspects of various project components. The layout is shown in Annexure-1 and design inputs are briefly described below.
1.9.1 DAM AND APPURTENANT WORKS
I. MAIN FEATURES
The concrete gravity dam is located near Gulabgarh village. The dam axis is about 250m upstream of Bailey bridge. The spillway is provided with four orifice spillways with crest elevation 1874.00 m a.m.s.l. and two upper level overflow type bays without breast wall at crest level 1880.00 m a.m.s.l. to pass the flow discharge 9140 cumec (PMF). For energy dissipation in the downstream of spillway a jump type stilling basin is proposed because river bed is made up of RBM upto great depth. Main features include: • Dam height from deepest foundation level 165.0 m • Length of dam at top along dam axis 250.50 m • Design Flood (PMF) 9140 m3/s • Maximum Reservoir Level (MRL) 1895.00 m a.m.s.l. • Full Reservoir Level (FRL) 1895.00 m a.m.s.l. • Minimum Draw-Down Level (MDDL) 1887.58 m a.m.s.l. • Live storage 13.00MCM (for daily peaking storage) • Energy Dissipation stilling basin • Length of reservoir 9.5 Km II. DIVERSION SCHEME
A concrete lined diversion tunnel of dia. 13.0 m and a length of about 525 m is proposed to be constructed on the right bank of the river to pass a discharge of 2000 cumec.(25 year recurrence non monsoon flow). The non monsoon flow will be allowed to pass over the concrete dam. flood is adopted for the design purpose,The non monsoon flow will be diverted into the tunnel with the help of 40m high coffer dam in the upstream and 18m
15 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
high coffer dam in the downstream to isolate the dam area for construction .Two coffer dams will be rockfill type .
Coffere dams have been designed for non-monsoon flow and will be used for first year construction of main dam. If required it will be built in second construction season. After completion of dam construction the diversion tunnel will be plugged. A gate will be lowered in the tunnel through a shaft before plugging the tunnel. A valve may be provided in the plug to act as an emergency outlet.
III. DAM
A concrete gravity dam is proposed with spillway in the central river portion. The dam height above deepest foundation level in spillway portion is 165 m and above river bed, it is 122m. The river bed is at Rl.1778.0 m and top of dam with a freeboard of 5m is 1900.0 m.
As per geological investigations carried out so far the rock is expected to be available at an elevation of 1735.00m. Thus, the depth of RBM below spillway block is about 43m.This has to be excavated to place the dam blocks on rock. Since diversion is planned for one season, the excavation and placing concrete in these block foundation is to be done in one season. Considering the magnitude of work, it is proposed to do foundation concrete in spillway blocks by roller compacted concrete. Above riverbed the spillway blocks are proposed in conventional concrete and non overflow blocks in both sides are proposed in RCC in order to expedite the construction and complete the project in 6 years.
IV. SPILLWAY
The spillway comprises four Sluice bays with 12m wide and 13.5m high radial gates with one set of fixed wheel type gate for maintenance, and two side bays each 12m Wide and 15.5m high openings provided with radial gates. Same stoplog will be used for side spillway bays. When fully open, the waterway is designed to pass the PMF (9140 m3/s) with an upstream water elevation of 1895.00 m. . Four sluice bays have been proposed with crest elevation at El.-1874m and two sidebays of spillway with crest elevation at El.- 1880 m respectively. The proposal of ski jump with ogee spillway envisaged in original DPR does not appear to be a suitable arrangement of energy dissipation when river bed is made of deep RBM. In such a condition a jump basin appears more appropriate if hydraulically feasible. It is
16 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
seen that discharge intensity from a spillway of 5 bays of 12 m width to pass the PMF of 9140 cumec is as high as 123 cumec/m for which a very deep jump basin is required. Therefore 6 bays as mentioned above are proposed. The river section is very narrow at dam site and it is not found feasible to increase the water way of the spillway towards the right bank. Hence the width is extended on the left bank .The existing road at El.1805 m on left bank shall have to be shifted at the time of construction of jump basin.
1.9.2 INTAKE
The power intake structures are located at the left bank of the Chenab River about 34.2 m upstream of the dam axis. It shall be able to divert design discharge 385.5 cumec. It shall also be able to minimize sediment entry into HRT. It shall ensure the submergence criteria with respect to MDDL of 1887.58 masal. The project is run of river scheme but at FRL of 1895.00 the reservoir lengths is about 9.5 Km, Hence it is expected that all the coarse sediment will deposit in the upper reaches of reservoir and fine sediment will come near the dam. It shall be got confirmed and quantatively assessed through model studies. Since flood is not retained in the reservoir most of the sediment reaching the dam will be flushed through the spillway. If the crest of intake is kept sufficientietly higher above spillway crest less sediment of fine category would enter the intake. As the head on turbine is 108.53m and quartz particle in sediment is less than 50%, excessive damage to machine is not expected. Hence no sediment chamber is proposed. Its provision is also not feasible within the topographical limitations of the project determined after detailed investigations and studies carried out at the time of original DPR (1993 by CWC).However, for emergency condition, provision is being made in project estimate for an extra runner. For carrying a discharge of 385.5 cumec, a 10.5m diameter head race tunnel is proposed. If semi-circular intake is provided in the reservoir the tunnel invert reaches to a level which is new Zero elevation expected after 30 years of sedimentation in reservoir to ful-fill the submergence criteria. Hence it is proposed to provide a pool by the side of reservoir which will draw water from the reservoir at a higher elevation. The Head race tunnel will draw water from the pool at a lower level. The cage type intake is provided for the Head race tunnel in the pool. It will be fitted with trash rack. A service gate is also provided at the entry of HRT to reduce sediment entry in the pool. The crest of opening is kept at 1883.00m. This will further raised during floods by droping the stoplog gates being provided at crest.
17 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
One silt excluder tunnel 3.0m diameter is proposed adjacent to the trash rack which will be used to remove the suspended silt particles come up and get settled in the intake pool over the long period in non monsoon season when the discharges are high with silt contents. The flow through silt excluder tunnel will be discharged to the stilling basin downstream of dam.
1.9.3 WATER CONDUCTOR SYSTEM
The water conductor system is 330m long will consist of a 165 m long 10.5m diameter circular finished concrete-lined head race tunnel from the intake, a 90.0m deep vertical shaft. and a 10.5m diameter horizontal concrete lined tunnel at the bottom of vertical shaft. It branches into 4 Nos. steel-lined unit pressure shaft each 4.40m in diameter to feed four generating units in the powerhouse cavity.
Both the excavated power tunnel and the penstock will be horseshoe-shaped in order to facilitate the movement of construction vehicles. However, the finished sections of both will be circular. The dimensioning of the water conveyance system is based on an optimization analysis which considers the cost and corresponding energy generation loss due to head losses. Due to the very short length of the water conductor, no surge tank is provided. A free flow tail race tunnel of same size (10.5m dia.) as that of head race tunnel is proposed to discharge the flow back to the river at about 100m downstream of stilling basin. The invert at the outlet portal of TRT is kept at El.1776.50. A 10.5m wide and 10.5m high gate has been provided at the outlet of TRT to protect the plant from high floods in river. The gate operation deck has been kept at El.1803.00 as the HFL at TRT outlet portal is estimated as El.1799.00 m.
1.9.4 POWERHOUSE COMPLEX
As there is no topography and geologically suitable site for a surface power house at the toe of dam an underground house to proposed in the left bank. It will consist of two main caverns: the machine hall (20m W x 116.5m L x 43.5m H) and the transformer Cavern with interconnecting tunnels. Clear spacing between two caverns is 40m, the machine hall cavern has erection bay on one side and control room on the other side.
The main power house cavern will be equipped with 4 Nos. vertical Francis type generating units each 95.0MW operating under the rated head of 108.53m.
18 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
The transformer gallery 14(W)X(109.3(L)X20(H) will house thirteen single-phase power transformers (including one spare transformer) and an internal GIS substation switchgear.The cables from generator go to the transformer through four cable ducts each of 5m diameter. The 400 kV cables through cable tunnel will transfer energy from the GIS substation switchgear to the outdoor switchyard located on the left bank. Access will be achieved from the south by a Main Access Tunnel of 8.0m D-Shaped that begins at the main access road level El.-1805.00 m and runs towards caverns. On the opposite side of the Caverns a second tunnel (Construction Adit-cum-ventilation tunnel 6.5m Dia. D-shaped) will be excavated and air ducts will be installed in this tunnel, it will be used as an emergency exit as well during the operation phase. On the machine hall and turbine concrete floors there are four access openings for installation and maintenance of the four butterfly valves installed upstream of the turbines. There is also one access opening to install and remove the runner; the runner will be removed from the draft tube through the butterfly valve floor and, will be transported to the access opening on a carriage on rails. In order to avoid creating a vacuum during transient each draft tube is provided with a gate at the end of machine to allow dewatering for inspection and maintenance purposes. Water is conveyed to the river through one tailrace tunnel which will be concrete lined with a gate at the end. Electrical and mechanical shops will be installed at the end of the powerhouse on the service bay. At the other end of the powerhouse an independent control block will be built to house the control room, telecommunication, electrical equipments (batteries and chargers), compressed air, potable water station, waste water pumping station, toilet room and HVAC equipment. An L- section from intake to end of Tail race tunnel showing the water conductor and from power house complex shown in Drawing no. 135_01_00_002.
1.9.5 OUTDOOR SWITCHYARD
400 kV cables will transmit power from the Transformer cavern via the cable tunnel feeds to the switchyard. The switchyard will be accessed by the existing road. Power from the switch yard will be evacuated to the pooling station of Kirthai-II.
19 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
1.9.6 AUXILIARY POWER PLANT
The auxiliary power plant is envisaged to utilize flows to be released for environmental purpose and to cater the lean season.
The auxiliary power plant located at the right bank of the river. It comprises a Separate dam body intake a surface penstock and a surface power house with a tail pool and a tail race channel. This plant is envisaged to use a discharge of 9.5 cumecs to generate 10MW of power.
The intake is proposed within the right bank from non-overflow section of the main dam with a clear opening of 3.75m x 3.75m.This intake is provided with trash rack and a vertical fixed wheel gate both of which will be operated from the dam top i.e. El.1900.00m. The centre line of intake opening is kept at El.1882.00m considering the water cushion required for the avoidance of vortex formation
The Dam body intake will be followed by the 1.75m dia. 328m long surface steel penstock which would follow the ground profile and laid in the excavated trench. The penstock will be provided with manhole, joints & fasteners and supported on intermediate saddles. Each bend will be provided with suitably designed RCC anchor/thrust blocks. The steel will be of Grade: ASTM537 Cl.2.
The penstock will feed to a surface power house which will be equipped with a Francis type vertical generating unit of 10MW operating under the rated head of 108.53m.The power house will be located by the side of the stilling basin near its end. The service bay elevation and centre line of penstock will be at El.1785.25m and El.1776.35m respectively. An outdoor switchyard with a transformer will be at the backyard of power house and the power is envisioned to be pooled at Pot head yard of main power house through a 430.0 m long transmission line by creating a crossover to the Chenab River through the bridge, which will later replace the existing bailey bridge.
A tail pool is also provided with a short tail race channel 40m long and 4.0m wide which will discharge the flow back to the river with normal tail water level at El.1784.00m and minimum as El.1781.55m. Considering the high flood level as El.-1799.00 m, it is proposed that the training wall at right bank of stilling basin will be stretched and extended to meet the ground El.1800.00m which will protect power house from flood.
20 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
1.9.7 FURTHER STUDIES
Further studies and investigations as below are proposed to be carried out during detailed engineering for implementation of the project:
• Additional Topographical surveys as needed. • Discharge and Sediment observations • Further geotechnical tests, as suggested in Chapter – of Volume-I • Hydraulic model studies for dam and intake works • Reservoir sedimentation studies through Mathematical modeling. • Dynamic analysis of dam through FEM or other computational method.
1.10 ENVIRONMENTAL EVALUATION
Environment studies for the project have been carried out by specialists. These studies have been carried out in two parts one gives the environmental impact assessment and the other deals with the environmental management plan.
Project as well as study area does not fall within any National Park, Sanctuary, Tiger/ Elephant Reserve or Biosphere Reserve. The forest around the project area is sparsely vegetated and no specific wildlife is reported in this region Construction of proposed concrete dam, power house, project facilities, colony roads and reservoir area under Kirthai–I Hydroelectric project entails a land requirement of 321 ha.Total private land required for the project has been worked out as 58.0 ha, which is spread over three villages in Padder block of district Kishtwar J & K, The forest land required is 180 ha and rest is revenue land. List of the Project Affected Families (PAFs), whose land is coming under acquisition, has been prepared and a separate R&R Plan is prepared in line with the National R&R Policy, 2007. Objective of the R&R Plan is to ensure that all the Project Affected Families (PAFs) are duly compensated and there is minimum impact on this count. A cost of Rs.8920 lacs has been estimated for implementing the Environmental Management Plan (The details are briefly given in chapter -18 Environmental & Ecological aspects of Main Report Volume-I)
1.11 INFRASTRUCTURE WORKS
Since the project components are on the left bank of Chenab River, existing bailey bridge will get submerged after construction, therefore it is proposed to provide a bridge
21 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
downstream of the dam to approach the left bank and Gulabgarh village also. A permanent road to dam, intake and power house is provided.
In addition to the permanent access roads, temporary access roads toquarries, muck disposal area, DT inlet, DT outlet, u/s and d/s cofferdams, Main dam. All roads will be connected to Galhr Sansari road on left bank and to right bank via balley bridge during construction and after construction through new bridge Strengthening and widening of existing road from Galhr to project in a stretch of 28 Km along with, bridges and culverts is proposed in this project. Power requirement which is estimated about 10 MVA can be met with by procuring the supply from power department authorities 33/11 KV substations along with new power lines as required will be provided for making the power available at various project sites. Two transformers of 3MVA one each at dam and power house site and two transformers of 2MVA one near DT,and one near Colony stores & workshop In order to feed emergency loads D.G. sets of 1000kVA capacity will be installed near dam site. Provision is also made to provide telecommunication net-work from nearest P & T exchange.
1.12 CONSTRUCTION PLANNING AND MANAGEMENT
It is proposed to complete the project and commission the four units of 95 MW and one unit of 10 MW within a period of 60 months.
The critical activity of the project is the construction of dam. Major critical activity in dam is concreting in the foundation below river bed level, which is about 40m in one season. It is proposed to be done Roller compacted. Roller compacted option is chosen for faster construction. The underground structures will be excavated by conventional method of drilling and blasting. It is proposed to use most modern equipment for underground excavations, which will include computerized hydraulic jumbos, automatic rock bolters and wet shotcrete machines for fibre reinforced shotcrete. . To achieve the objective of commissioning the project within the stipulated timeframe and also to ensure quality of all the works to the recognized Indian and International Standards, an efficient and result oriented construction agency will have to be engaged.
22 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
1.13 ESTIMATED COST
The estimated cost at June 2012 price level works out as given below.
Cost of the project An estimated cost of project comprising both civil and electro mechanical works on the basis of prices prevalent in June 2012 has been worked out as under:-
• Cost of pre- construction works 14456.98 Lacs • Civil works (Total civil works cost) 161355.70 Lacs • E & M works 65643.03 Lacs • IDC and financing charges 31975.58 Lacs • Escalation during construction 44429.94 Lacs • Total project cost 303404.25 Lacs • Present Cost of construction per MW 582.04 Lacs • Cost of project per MW 777.95 Lacs
1.14 ENERGY GENERATION AND TARRIF
The annual energy generation from the project at 90% and 50% dependability is as below:
• Energy generation for 90% dependable year 1503.93 MU • Energy generation for 50% dependable year 1679.34 MU • Annual Energy generation for 90% dependable year At 95% plant availability 1460.87 MU
Cost of Generation per Unit
• The cost of generation in first year Rs.4.42 • Levelised Tarrif Rs.3.88
1.15 RECOMENDATION
The project appears technically feasible with no serious risk during construction. The detail design will however has to take into account the results of geotechnical investigations regarding dam foundation and power house cavern which are presently in progress.
The cost of construction per MW is 5.82 crores and cost of project per MW is 7.78 crore. This appears reasonable with present trend of cost of such projects. The levelized cost of
23 | Page DEC 2012
J & K STATE POWER DEVELOPMENT CORPORATION LIMITED SYNERGICS HYDRO (INDIA) PVT. LTD. KirthaiI Hydroelectric Project Executive Summary
generation is Rs.3.88 per unit. This cost is quite reasonable after seven years when project is expected to be completed. In view of above the project appears techno economically feasible and it is recommended for implementation to meet the power requirement of the state which has no other resource for power except hydropower.
24 | Page DEC 2012 10-Daily mean flows at Kirthai dam site (Approved by CWC)
Jun Jul Aug Sep Oct Nov Year I II III I II III I II III I II III I II III I II III 1967-68 529.0 614.2 728.1 1000.3 1019.8 1222.9 912.0 810.7 633.0 319.5 388.2 195.8 91.7 68.4 59.1 55.1 71.0 69.1 1968-69 793.8 1161.4 1152.2 1266.8 1299.6 987.6 1228.5 1230.0 587.9 534.8 497.3 439.6 222.0 120.5 98.0 86.3 77.6 70.7 1969-70 565.3 696.6 649.8 883.3 1108.0 935.2 976.5 885.9 538.5 447.5 315.1 231.1 154.6 118.4 98.5 93.2 84.5 72.8 1970-71 453.1 461.2 743.3 882.7 776.1 643.9 825.8 672.6 711.7 783.4 461.8 207.0 127.6 116.4 85.4 66.8 58.2 55.7 1971-72 666.6 582.5 748.0 575.4 672.9 820.3 887.2 573.6 614.0 296.4 176.3 199.0 136.3 105.2 70.3 59.2 53.5 51.3 1972-73 496.3 686.4 843.7 788.6 672.9 756.5 812.9 554.4 538.8 512.1 342.6 149.3 113.3 97.5 90.0 80.5 70.7 63.7 1973-74 827.4 1685.4 1326.7 1289.6 1460.6 1046.8 1186.4 806.7 935.5 674.8 617.8 382.7 173.3 115.3 90.3 76.5 68.1 61.9 1974-75 284.4 471.4 317.5 517.9 924.9 719.4 775.6 679.1 647.1 407.7 275.0 199.7 119.6 93.2 68.3 56.6 53.7 53.0 1975-76 530.1 795.0 889.1 748.5 1492.5 949.3 924.4 1181.8 849.2 644.3 549.5 279.2 216.3 174.4 106.0 80.9 70.0 57.3 1976-77 784.3 556.1 487.1 907.3 1289.7 1286.2 936.9 844.1 596.5 535.2 286.6 229.3 162.5 102.5 87.6 79.0 73.9 69.8 1977-78 430.7 286.1 1193.7 1413.4 1274.0 1100.3 1277.8 896.7 813.3 698.4 393.3 232.9 156.6 112.2 100.9 82.4 68.9 64.4 1978-79 889.1 789.3 1489.0 1511.6 1252.1 1289.5 1303.3 1151.0 968.0 376.7 339.7 220.6 161.2 133.3 105.7 86.2 81.1 69.9 1979-80 325.6 686.8 1252.2 1095.0 1397.4 1019.7 1294.8 979.1 722.6 653.5 326.1 152.0 147.9 111.1 81.3 72.8 65.5 62.4 1980-81 588.2 734.2 1022.1 1105.0 1278.3 999.4 1149.8 652.1 711.3 446.6 306.6 221.2 191.8 124.3 92.1 79.7 72.5 65.5 1981-82 391.5 426.6 1125.4 884.9 1397.4 1524.5 1228.1 1063.1 699.8 498.7 245.5 245.8 127.2 104.3 90.1 83.9 73.8 65.7 1982-83 463.1 763.7 648.1 809.0 890.1 1247.5 1393.3 1027.9 616.0 537.2 482.3 223.6 120.5 104.5 92.8 77.9 69.6 65.6 1983-84 447.3 483.3 957.6 872.8 546.3 1355.0 1609.3 1201.8 1245.6 965.6 586.9 346.6 250.1 167.0 100.9 88.1 78.5 67.3 1984-85 974.3 891.3 951.6 858.3 648.8 890.5 1045.9 1021.3 840.4 569.1 356.1 149.5 102.4 92.9 89.1 77.2 69.7 65.2 1985-86 601.1 709.6 795.0 927.1 1074.6 968.6 1023.4 925.2 840.6 612.3 361.6 244.8 189.7 107.8 85.6 77.6 72.3 65.5 1986-87 317.4 784.7 1304.7 1120.7 1154.1 1302.7 1170.4 1071.5 748.4 589.0 284.3 245.7 148.0 128.5 94.8 87.0 83.8 79.7 1987-88 618.1 550.2 786.4 1004.9 989.0 1135.7 900.8 906.1 998.7 781.7 521.2 380.3 215.6 162.1 110.2 97.7 87.8 80.6 1988-89 545.5 756.5 1399.8 1299.9 1303.4 1366.3 933.4 851.8 543.6 512.7 455.4 546.1 268.4 174.5 138.2 117.5 100.5 95.7 1989-90 985.6 697.9 834.6 816.8 1171.9 1426.5 820.6 948.5 844.9 482.5 482.3 325.3 229.8 164.9 140.5 121.8 106.7 91.1 1990-91 619.3 607.5 1489.4 1399.9 1038.0 982.3 1211.6 867.9 801.3 672.1 452.0 325.3 186.2 144.1 104.5 90.8 83.8 70.9 1991-92 759.9 893.6 850.3 1159.1 1108.0 1048.0 860.3 727.8 756.3 715.6 627.4 296.2 175.0 140.9 115.3 98.2 87.9 75.3 1992-93 466.3 670.4 807.9 679.5 911.2 1004.9 855.6 735.4 749.2 671.2 341.6 250.7 201.3 162.2 131.4 113.5 104.3 88.1 1993-94 628.7 666.6 755.8 1137.3 986.7 722.4 725.9 618.9 591.6 573.8 418.7 256.2 189.2 166.8 121.9 77.0 68.2 85.2 1994-95 560.3 601.9 885.1 954.3 774.8 691.8 659.1 632.9 517.3 521.7 369.2 224.3 181.6 148.5 114.7 77.4 65.5 60.3 1995-96 523.5 824.3 561.3 842.9 879.0 1175.2 651.2 708.7 535.7 503.6 362.6 315.6 290.5 264.9 221.1 189.3 128.4 99.2 1996-97 600.7 797.8 793.8 614.4 605.4 617.8 618.6 677.9 648.8 472.8 376.3 324.5 280.6 169.8 108.9 102.9 97.2 85.4 1997-98 246.3 292.7 384.5 448.3 574.5 634.9 485.0 508.7 576.3 344.2 274.5 220.2 166.9 128.0 110.9 102.9 92.8 89.7 1998-99 542.8 547.4 758.1 933.5 946.7 818.9 726.6 699.7 605.1 645.2 659.4 691.3 469.6 273.5 188.9 171.8 150.9 143.9 1999-2000 291.8 383.1 479.9 627.2 880.3 1009.4 1159.1 936.0 987.8 714.4 533.4 354.9 236.7 175.1 149.2 143.4 136.0 128.3 2000-01 529.4 508.6 593.3 667.2 801.7 1095.7 1114.1 757.1 766.9 627.2 427.4 292.5 236.0 186.2 177.8 156.7 117.6 101.4 2001-02 417.4 689.6 538.2 659.6 933.8 963.0 731.0 899.7 669.5 476.5 381.0 319.6 260.3 172.9 155.9 138.0 122.4 112.7 2002-03 677.3 786.7 895.9 1049.3 1138.6 1046.1 929.1 929.4 973.4 654.3 372.3 267.2 204.5 178.7 141.7 105.4 90.9 77.2 2003-04 1048.6 943.3 1009.0 948.0 885.3 943.3 843.1 669.6 554.4 527.3 391.2 291.4 194.4 175.9 134.7 80.0 70.9 64.1 2004-05 372.8 691.2 521.4 819.1 591.0 569.4 582.2 643.6 484.0 424.1 442.7 240.8 190.9 137.3 119.1 61.9 54.9 49.6 2005-06 459.3 585.9 1170.5 1092.3 1109.7 993.3 936.5 807.3 579.5 630.9 444.6 304.7 250.5 169.5 135.3 85.5 75.8 68.5 2006-07 536.5 421.8 670.2 976.5 750.9 1038.9 1250.8 796.8 671.7 564.9 420.6 239.8 232.3 186.9 139.7 78.2 69.2 62.6 2007-08 366.7 584.2 852.0 767.2 513.4 643.1 624.5 644.6 546.0 468.1 319.4 240.7 135.6 120.7 90.0 63.6 56.3 50.9 2008-09 623.0 1062.1 779.6 867.5 774.1 746.7 835.9 627.3 570.9 302.6 253.5 183.4 171.8 118.8 100.9 69.4 61.5 55.6 2009-10 582.7 379.9 716.0 676.1 1010.0 821.7 913.4 1021.6 635.2 446.1 205.2 298.7 198.5 142.3 141.5 73.4 65.0 58.8 Average 566.5 679.3 864.1 927.9 983.9 989.8 961.2 833.6 708.5 554.3 398.2 278.7 192.5 143.3 113.5 92.2 81.7 74.2 ANNEXURE-I Unit: Cumecs Dec Jan Feb Mar Apr May I II III I II III I II III I II III I II III I II III 66.3 56.1 49.7 51.0 49.3 39.7 93.6 49.8 42.7 55.7 67.2 56.9 67.3 94.6 193.6 180.6 228.4 341.0 65.2 64.3 61.7 57.1 53.2 48.0 55.3 53.5 56.2 62.2 77.2 85.7 91.3 138.2 127.1 186.8 236.7 317.5 67.7 76.7 59.9 52.6 52.9 54.9 56.4 54.7 52.2 53.5 48.7 57.7 73.9 109.3 177.2 160.0 317.9 420.2 49.2 42.0 39.6 39.1 41.5 42.2 44.5 41.3 39.4 42.6 58.5 64.4 77.6 86.5 116.2 118.7 149.4 330.5 49.1 50.4 48.2 45.1 42.5 43.6 42.6 40.7 44.1 44.7 51.0 60.7 58.6 79.1 89.6 118.7 243.3 366.2 60.0 56.8 54.4 52.0 54.6 47.5 50.2 53.2 55.2 61.1 64.4 96.0 110.4 155.3 391.5 645.6 387.6 531.3 56.1 54.0 49.7 46.6 45.0 45.4 41.9 43.9 43.8 47.7 48.1 74.6 81.5 97.3 136.3 211.5 167.5 168.7 53.1 48.9 48.5 50.4 49.1 38.8 41.5 34.1 46.4 44.8 49.5 63.5 84.4 96.6 140.6 191.4 371.1 449.3 55.5 52.0 48.6 46.9 43.7 46.0 40.0 50.0 48.7 55.9 47.6 57.9 73.2 92.5 183.4 202.0 322.2 451.8 63.0 57.9 54.5 55.4 48.6 50.1 51.0 54.9 49.1 49.3 58.1 69.1 81.2 77.5 98.0 106.2 126.9 280.4 62.6 61.8 57.1 49.5 46.1 43.2 43.4 46.7 44.7 51.6 53.5 71.4 64.0 141.8 145.1 321.0 534.3 662.9 63.9 61.1 63.7 53.3 51.2 51.8 49.1 48.9 48.6 30.7 44.9 110.2 119.4 156.4 225.8 250.2 238.8 226.1 56.9 53.3 49.6 49.8 50.2 43.0 45.6 44.6 48.3 47.9 49.3 59.8 67.5 92.8 133.7 216.8 239.1 321.1 60.4 57.4 43.1 52.7 47.8 46.3 50.5 49.1 51.8 52.4 51.8 66.2 81.9 149.5 223.5 410.1 430.4 581.5 61.8 56.8 51.4 51.4 49.9 52.7 52.9 48.8 50.9 55.0 53.6 64.4 76.1 106.0 133.0 223.4 175.4 281.0 64.1 59.5 54.5 56.3 54.6 50.3 54.1 53.1 49.6 51.0 55.6 66.4 101.7 101.5 127.5 203.3 313.7 347.2 62.6 57.9 55.6 50.4 52.7 50.4 49.0 43.6 86.8 54.4 58.2 71.0 91.4 92.2 129.4 204.9 248.7 503.9 62.2 58.7 53.9 49.7 53.2 51.7 51.5 50.8 52.0 54.7 54.5 62.4 63.1 78.6 105.3 151.3 192.8 459.8 62.2 60.1 58.2 55.7 52.4 50.2 49.9 48.4 48.9 56.4 59.6 75.4 77.8 130.5 171.7 205.9 364.8 233.3 74.2 73.9 65.0 63.0 60.8 62.4 58.3 57.8 60.4 72.1 72.8 80.4 97.0 97.3 166.8 157.1 172.1 322.9 75.7 72.4 70.6 64.3 58.6 56.0 55.7 55.2 51.5 51.3 67.1 96.9 114.4 265.5 308.2 325.6 465.9 503.3 84.8 76.7 78.4 89.1 82.5 81.1 76.0 76.1 73.1 76.1 78.0 94.8 104.6 125.8 146.5 216.6 345.8 584.7 79.8 73.1 64.5 65.3 65.2 64.7 62.0 67.2 66.2 61.2 71.9 83.1 95.5 133.3 179.5 323.7 745.3 675.9 62.9 55.4 52.6 58.0 55.5 53.3 52.9 52.2 55.6 69.1 78.3 100.6 137.6 116.3 163.0 230.4 357.1 331.5 67.4 63.9 59.5 55.6 55.1 53.1 53.2 55.5 54.7 54.9 59.9 80.1 98.0 127.5 192.0 204.1 306.7 386.1 74.9 71.3 66.7 67.6 62.9 58.2 57.8 60.0 53.0 56.2 66.9 72.5 86.4 114.7 189.0 332.1 250.4 440.5 80.6 73.8 68.4 57.4 48.1 50.2 41.1 38.8 43.1 48.2 70.1 81.6 137.6 113.4 135.6 254.2 261.8 433.7 54.9 49.4 46.8 39.9 38.3 38.4 37.9 37.1 36.6 39.6 46.0 49.2 60.5 60.0 90.8 190.1 385.2 254.3 83.5 82.3 80.6 77.7 72.4 65.4 60.4 60.4 61.1 63.9 55.5 99.8 100.7 113.0 228.9 182.3 222.7 325.6 78.6 74.8 71.9 69.7 67.8 66.7 65.5 61.5 58.6 60.0 63.3 66.0 68.7 79.9 118.6 147.0 165.9 211.8 90.5 85.4 79.4 73.0 68.7 64.1 55.0 54.2 57.8 77.2 74.0 116.5 157.4 190.9 239.5 308.5 441.3 571.4 135.7 122.4 101.5 86.0 79.6 74.8 65.6 61.2 60.7 64.5 69.4 87.5 132.8 148.8 203.1 178.2 222.9 310.9 107.8 86.6 76.7 66.7 59.0 57.4 56.0 55.9 56.6 58.8 63.3 70.1 76.1 84.0 98.6 205.0 692.8 1030.0 82.4 71.5 65.2 60.8 58.7 57.1 57.1 57.2 54.6 55.1 55.1 63.8 77.0 90.6 106.6 141.9 240.4 350.3 106.9 105.7 99.1 93.4 92.6 60.0 49.1 49.7 54.9 60.5 80.3 114.9 130.5 163.2 185.6 233.9 526.7 548.3 67.8 65.7 64.5 62.4 61.3 57.5 55.4 53.1 52.1 57.1 54.9 76.1 134.9 155.2 243.3 391.4 591.2 673.6 58.8 55.1 51.0 48.8 46.7 44.2 44.3 43.0 44.0 46.6 72.6 71.4 112.0 121.7 184.7 186.2 334.3 333.0 45.5 42.7 39.5 37.7 36.2 34.2 34.3 33.3 34.1 52.6 86.2 89.1 89.5 128.5 231.3 324.6 290.5 274.3 62.8 58.9 54.5 52.1 49.9 47.2 47.4 45.9 47.1 46.1 51.0 68.6 86.0 92.8 203.9 359.2 498.3 681.5 57.4 53.8 49.8 47.6 45.6 43.2 43.3 42.0 43.0 36.6 46.9 103.5 130.2 259.5 260.9 318.7 359.0 252.4 46.7 43.8 40.5 38.7 37.1 35.1 35.2 34.1 35.0 73.4 83.2 53.1 61.9 76.5 87.9 197.7 330.1 386.5 51.0 47.8 44.3 42.3 40.5 38.3 38.4 37.3 38.2 72.4 68.8 53.4 61.2 86.9 96.7 123.6 192.9 432.4 53.9 50.5 46.8 44.7 42.8 40.5 40.6 39.4 40.4 77.1 70.7 66.7 61.2 95.9 161.4 268.3 268.6 388.2 68.1 63.8 59.1 56.4 54.1 51.1 51.3 49.7 51.0 55.9 61.8 76.1 91.9 119.0 169.1 235.1 324.6 418.1