North Korea lost an estimated 85% of its power generation capacity due to flood damage to infrastructures such as hydropower plants, coal mines, and supply and transport facilities.[29] UN officials reported that the power shortage from 1995 to 1997 was not due to a shortage of oil, because only two out of a total of two dozen power stations were dependent on heavy fuel oil for power generation... and these were supplied by KEDO (the Korean Peninsula Energy Development Organization). About 70% of power generated in the DPRK came from hydropower sources, and the serious winter-spring droughts of 1996 and 1997 (and a breakdown on one of the Yalu River's large hydro turbines) created major shortages throughout the country at that time, severely cutting back railway transportation (which was almost entirely dependent on electric power), which in turn resulted in coal supply shortages to the coal-fueled power stations which supplied the remaining 20% of power in the country.[30]