The Koldam Dam Hydropower Project of the NTPC Limited, commonly known as KolDam, is an under construction embankment dam on the Sutlej River near Barmana on the Chandigarh-Manali Highway ( NH-21 ) on the border of Bilaspur district and Mandi district, Himachal Pradesh, India. The main purpose of the dam is hydroelectric power generation and it will support an 800 MW power station. The foundation stone for the dam was laid on 5 June 2000 by Prime Minister Atal Bihari Vajpayee. On 14 January 2004, main construction on the dam began. Due to problems associated with habitat and forest loss, the project has been delayed. Attempts to impound the reservoir first failed in December 2013 due to problems with sealing the diversion tunnels. By 18 March 2014, a fourth attempt to seal the tunnels and fill the lake was underway. Repairs were made and impounding was mostly complete in April 2014. Generator commissioning was original scheduled for 2009 but has been rescheduled to later in 2014 and 2015.