Control system for filling accumulation pool HP Jablanica is established in 1954. It consisted of 163 control cross sections, surveyed accross the valey of Neretva, as the main flow, and its tributaries for which it was considered they are erosion active. Number of control profiles was in the time from 1956 to 1972 racionalised on 72 profiles, so that the control of the accumulation pool silt filling according to the last elaborate from 1989 was done on 68 measurement profile. Activities of control measurements of HP Jablanica accumulation pool filling included using echosonder and TRIMBLE GPS R8, for 68 control profiles, overall length od 24.535,00 m and survey measurements processing and analysis.