In addition to furnishing works, there was also need for COKP Sveti Rok – mid-way connector chambers works , upgrade of Fire Department building on the south tunnel Sveti Rok and works to build a new transformer station supply unit KBDV 35 kV 110/35 kV GRAČAC – TS 35/20 kV Sveti Rok Tunnel (North). Works to the tunnel Mala Kapela and Sveti Rok included ventilation system, fire alarm and Fire hydrant network, tunnel lighting, LV power supply, spare power supply, separators for tunnel approach road tunnel lighting, sewer cable, fiber optic cable, TPS system, sound systems, radio system, video-data system, remote control of traffic and traffic-technical part. Upgrade of Sveti Rok – on the plateau COKP e-Sveti Rok to build additional building (building control traffic).
Reconstruction and upgrade of Fire Department building on the south tunnel Sveti Rok – the object is intended to accommodate Fire Department and other traffic control tube tunnel. KBDV 35 kV – New TS 35/20 kV Sveti Rok Tunnel (north) will be incorporated in the construction of a new electricity network KBDV 35 kV 110/35 kV GRAČAC – TS 35/20 kV Sveti Rok Tunnel (North) in length from approx. 22 km. With the subject lay electricity cable and optical cable for the realization of optical connections between the 110/35 kV Gracac and TS 35/20 kV Sveti Rok Tunnel (north).