we start from receiving the points then making surface by that points then we will know how editing the points and the surface that we make aparalel practice for calculation the volume of the mountain separate the main way course for design acanal here you will have the points as exel cheet to practise on it and we will discusse how to chose the better datum surface for computing the best volume for the mountain 

so we will start from scratch

how to receive points

,making points into group

,making surface

and adding legend for the surface

,making longitudinal profile and assemply

, corridor and corridor surface

then finally computing the volume and showing the final results by (view cross sections )and getting volume schedual and final report