 Due to outdated data (measurements from 1966 to 1986 were used) and the fluctuation of the inflow of sediments, inadequate assessment of the lifespan of the reservoir has been made.There is strong evidence that the volume of the sediment inflow is much higher, since the construction of the new 20 km road was not included in the measurements.Furthermore, the slopes around reservoir are unstable which can further shorten the lifespan of the reservoir.