In 2004, the Heating Grids of AO MOSENERGO have started the maintenance campaign on May 11. Currently, all operations are conducted in the strict compliance with the schedule.

Under the annual guidelines on prepation for the heating season, AO MOSENERGO carries out mandatory testing of heating lines that results in 21-day water supply switch-off in Moscow. The length of this period was approved by the Moscow Government. AO MOSENERGO has to cut water supply to test parts of the water supply system. AO MOSENERGO has never extended maintenance perod and on many occasions completed the work earlier than was planned. In October, the Company's divisions receive readiness certificates that confirm their preparedness for winer operation.

As of today, AO MOSENERGO has repaired more than 913 km of main heating lines which equals 41% of the total maintenance volume. From the start of the maintenance campaign AO MOSENERGO detected and eliminated 1,830 pipe defects. AO MOSENERGO plans to complete the maintenance by end-August.

In preparation for the winter peak load AO MOSENERGO will lay 70 km of new pipes. In addition, in 2004, the company will lay 12 km of pipes insulated with polyurethane foam that are more reliable and have longer operation lives. As a result, the total length of new insulated pipes will grow 16%.

In accordance with the plan, AO MOSENERGO carries out maintenance on pump stations. In the second half of August, the Company will carry out overall testing and then will put them into operation. In addition, in IIIQ04 AO MOSENERGO will complete Businovo pump station which will help to improve the heating services in the Northern District.