Implementation of the 1st subproject (of a total of 2 subprojects) of the construction of the Pieschen district heating main line, including land development by DREWAG as a basis for district heating supply in Dresden northwest and large parts of the Leipzig suburb. The first subproject consists of the construction of the left-Elbian connection to the existing district heating network in the area of the Semperoper (construction sections A1 to A5), the Elb Dükerung (construction section B with civil engineering, civil engineering works, tunnels, pipe technology, EMSR), the construction of the right-hand-elbian district heating line up to the Gehestraße school site (construction sections C1 to C7 and C9 and house connections), as well as individual parts of the area development in the district of Dresden-Pieschen and -Leipzig Vorstadt (parts of construction section D, here DV 17-1 to DV17-3 and house connections).