The selection of an excavation technology is a very important and demanding task when planning excavation in solid rocks, whether on a surface mine or a construction pit. The variety of rock mass characteristics greatly influences the application efficiency of a particular excavation technique and technology. Discontinuous rock mass is easier to excavate in comparison to solid rock mass. Discontinuity is a well-known characteristic of rock masses, especially sedimentary ones, and this feature is very successfully investigated by using non-invasive, fast and relatively inexpensive seismic geophysical methods. The results of seismic investigations are the velocity of compression or primary P-waves and shear or secondary S-waves. Some of the methods from the literature use the mentioned seismic wave velocity as the primary indicator for assessing the possibility of rock excavation. This master thesis presents the classification of rock mass for the purposes of excavation on the part of a water supply network on the island of Hvar. Several classifications or methods that can be used to determine an excavation technology have been proposed and applied. The purpose of determining the most optimal excavation method is to reduce the excavation costs and save time. Geotechnical and geophysical investigation methods, such as shallow refractive seismic (SRS), multichannel analysis of surface waves (MASW) and Schmidt's hammer were used in field measurements, while basic geodetic knowledge and global navigation satellite system (GNSS) were used for field positioning. Based on the measured seismic wave velocities and the estimated uniaxial compressive strength on the outcrops the rock mass on the investigated route was categorized into two groups according to the classification methods which were used, depending on the complexity of an excavation. It was concluded that more than 90% of excavations need to be carried out by blasting, while smaller amounts of rock material can be excavated by using a machine.