The section IV. C2 has 4.6km of tunnels ; mined tunnels make up a length of 2.36 km (mostly double-track) and contain three cut-and-cover stations, i.e. Střížkov, Prosek and Letňany. The final design developed METROPROJEKT Praha a.s. The construction operations started in May 2004 and the the line was opened to the public in May 2008. Construction lot 11 covers cut-and-cover tunnels between the Střížkov and Prosek stations. The total length of this lot is 772 m. The cut-and-cover Prosek station (construction lot 12) is 205 m long in total. The magnitude of the earthwork operations on the Operational section IV. C of the Metro line C – 2nd phase corresponds to the size of the project. About 1,138,000 m3 of spoil were transported from the open pit excavations and tunnels.