One of the most large-scale projects today, which was commissioned by "Melioration and Water Farm" OJSC, is the engineering of strategically important water supply for the cities of Baku, Sumgayit and the entire Absheron peninsula of the Tahtakorpu hydroelectric complex. 

The reservoir of the hydroelectric complex is located at 32 km of the new canal Velvelechay-Jeyranbatan, on the territory of two districts - Shabran and Siyazan, on the tip of the southeastern ridge of the large Caucasus Range. Elevations range from 50 to 250 meters. Hydroelectric station site is located five kilometers west of the Shabran-Siyazan highway.

n earthen dam with a central clay core and gravel-sand prisms with a length of 1180 m along the ridge was designed with a 750 m wide base. About two and a half tens of millions of cubic meters of soil were poured into the body of the dam. The 135.5m high reservoir with a capacity of 218.9 million cubic meters of usable volume (total 268 million cubic meters) is one of the highest and largest in Europe.