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Tunnel ’’St. Ilija’’ is on the road that connects the Makarska Riviera and a new highway through the mountain range Biokovo (Figure 1). With a length of 4250 m, it is currently fourth road tunnel in Croatia, but also the tunnel with greatest overburden of 1300 m. According to the available information this is a road tunnel with the biggest limestone overburden in Europe, and as such it represented a real challenge for all who participated in its construction. This article describes the geodetic works that ...

Building a tunnel is a very expensive construction task, especially when cutting a tunnel in inconvenient geological conditions. The tunnel building is made drastically more expensive by badly executed works on the cutting itself, i.e. the excavation, and it happens when the areas of excavation cross-sections differ from the areas of designed profiles. It is therefore very important to monitor, apart from the direction of tunnel cutting in terms of position and height, also the areas of cross sections of the excav...