By the present moment the length of updated site makes 3,8 km. Till the end of current year it is planned to reconstruct 4,8 km. Air-line “Kuznetsk-kKlyuchiki-1 (2)” reconstruction is caused by necessity of increase of reliability of an electrical supply of Kuznetsk and the consumer of the first category – the Kuibyshev railway. Electric net power grids of "Penzaenergo", the branch IDGC of Volga, JSC carry additional loading due to intense industrial and agricultural development of the Penza region. To increase reliability of their work, power engineers of Kuznetsk industrial production carry out reconstruction on all length with replacement of all elements of air lines, including supports, wires, lightning rope. Reconstruction is made with change of arrangement of support in anchor flights and expansion of forestry rides. While realization of works power engineers have considered experience of other regions. The updated line becomes stable to glaze-wind loadings, and also possibility of falling of trees on air lines is excluded.