Koyna Dam 1 Koyna Dam Koyna Dam Location Koyna Nagar, Maharashtra India Coordinates 17°24′06″N 73°45′08″E Construction began 1956 Opening date 1962 Owner(s) Government of Maharashtra Dam and spillways Type of dam Rubble-concrete dam Height 103.2 m (339 ft) Length 807.2 m (2,648 ft) Impounds Koyna River Reservoir Creates Shivajisagar Lake Capacity 2,797,400,000 m3 (9.879×1010 cu ft) Surface area 891.78 km2 (344 sq mi) Power station Turbines Koyna dam foot powerhouse: 2 x 20 MW stage 1: 4 x 70 MW stage 2: 4 x 75 MW stage 3: 4 x 80 MW stage 4: 4 x 250 MW Total = 18 Francis turbines Installed capacity 1,960 MW Maximum capacity 120005 L [1] Official website The Koyna Dam is the largest dams in Maharashtra, India. It is a rubble-concrete dam constructed on Koyna River which rises in Mahabaleshwar, a hillstation in Sahyadri ranges. It is located in Koyna Nagar, Satara district, nestled in the Western Ghats on the state highway between Chiplun and Karad. Koyna Dam 2 The main purpose of dam is to provide hydroelectricity with some irrigation in neighboring areas.Today the Koyna Hydroelectric Project is the largest completed hydroelectric power plant in India[2] having a total installed capacity of 1,920 MW. Due to its electricity generating potential Koyna river is considered as the 'life line of Maharashtra'.[3] The spillway of the dam is located at the center. It has 6 radial gates. The dam plays a vital role of flood controlling in monsoon season. The catchment area dams the Koyna river and forms the Shivajisagar Lake which is approximately 50 km (31 mi) in length. It is one of the largest civil engineering projects commissioned after Indian independence. The Koyna hydro-electric project is run by the Maharashtra State Electricity Board. The dam has withstood many earthquakes in the recent past, including the devastating 1967 Koynanagar earthquake, resulting in the dam developing some cracks. After the disaster grouting of the cracks was done. Also internal holes were drilled to relieve the hydrostatic pressures in the body of the dam. Indian scientific establishment has formulated an ambitious project to drill a deep borehole in the region and intensely study the earthquake activity. This would help in better understanding and possible forecast of earthquakes. The proposal is to drill up to 7 km and study the physical, geological and chemical processes and properties of the reservoir triggered earthquake zone in real time. It would be an international project to be led by Indian scientists.[4] In 1973 the non-overflow portion of the dam was strengthened, followed by strengthening the spillway section in 2006. Now the dam is expected to be safe against any future earthquake even of more intensity than that of 1967. References [1] http:/ / www. koynaproject. org/ [2] "Electricity in India - Sources, Generation, Usage of Power in india" (http:/ / www. india-reports. com/ articles/ ElectricityInIndia/ electricity_india_hydroelectric_largest_powerplant. aspx). india-reports.com. [3] "Koyna Sanctuary Plundered" (http:/ / www. downtoearth. org. in/ content/ koyna-sanctuary-plundered). downtoearth.org.in. January 31, 2011. Retrieved November 14, 2011. The Koyna Dam in Maharashtra [4] "Major project to study earthquake activity at Koyna" (http:/ / www. thehindubusinessline. com/ industry-and-economy/ economy/ article1559091. ece). thehindubusinessline.com. External links • Official website (http:/ / www. koynaproject. org/ ) • Koyna Expedition (http:/ / koynaexpedition. blogspot. com) - Personal blog about a Koyna trek. Includes satellite imagery. The Shivajisagar Lake. Article Sources and Contributors 3 Article Sources and Contributors Koyna Dam Source: http://en.wikipedia.org/w/index.php?oldid=514425502 Contributors: Ahoerstemeier, Alan Liefting, Ameymodak, Anish7, Astute neophyte, Barsoomian, Bengalibaboo, Chandan Guha, Dr. Blofeld, Hariprasad, Hasanbay, IndianGeneralist, Johnpacklambert, Jovianeye, Khazar, Krishnarajv, LeaveSleaves, MER-C, Mac Davis, Nichalp, NortyNort, Olivier, Parvathisri, Pearle, Pragvansh, Rajeevmass, Ranten, Rehman, Sagarkarkhanis, Saurabh.jaywant, Sharathchandra reddy, Shivap, Shyamsunder, SouthernNights, TerryDu, Tim Starling, Vivek S Puranik, Winston365, 30 anonymous edits Image Sources, Licenses and Contributors File:Koyna-Dam.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Koyna-Dam.jpg License: Creative Commons Attribution-Sharealike 2.5 Contributors: User:Nichalp Image:Koyna-Dam2.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Koyna-Dam2.jpg License: Creative Commons Attribution-Sharealike 2.5 Contributors: User:Nichalp Image:Koyna-Dam3.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Koyna-Dam3.jpg License: Creative Commons Attribution-Sharealike 2.5 Contributors: User:Nichalp License Creative Commons Attribution-Share Alike 3.0 Unported //creativecommons.org/licenses/by-sa/3.0/.