Veteran of the System operator, former main specialist of service of teleautomatics and connection of Branch of OAO «WITH ECC» Yaroslavl RDU Sergey Efremov in composition the group of alpinists accomplished an ascent on the mountain of Kala-patar in 5630 meters high above a sea level and set
there is a flag of OAO on its top «WITH ECC». Preparation to the ascent began in October, 2008 and proceeded more polugoda. The participants of group passed the special  program of physical preparation, accomplished the row of trainings hikes in the regions of the Central federal district. All course of preparation
to the ascent on the top of Kala-patar was developed and conducted under the direction of Sergey Efremova. Himalaya top of Kala-patar, being in the district of height pole of Everest, group of alpinists under  devoted guidance of Sergey Efremova 
to the anniversary of the Yaroslavl power system which on was Mays, 22, 2009 carry out 75 years. In the nearest plans of Sergey Efremova is a journey on Krasnoyarskiy  festival of mountaineering and hike to Himalayas in 2010 occasionally 1000-letnego anniversary  Yaroslavl.Sergey Efremov
began to work in the Yaroslavl power system from 1966 as a technician of group of teleautomatics. Mountaineering engaged in from 1961, since accomplished more than 200 ascents of high degree of complication, in age 60 years El’brus overmastered the top of mountain on most
to the difficult north route. Till today Sergey Efremov is trenerom-metodistom and member of rescue detachment.