Building Information Modeling (BIM) technology developed in the recent decades and provided a new perspective which shifted the trend from simple 2D drawings to intelligent 3D modeling. Earthwork is the primary component of any construction project regardless of the scale of work. In the modern world, it has become possible to model and analyze the changes accurately in earthwork using BIM. This study presents a discrete module system devised to support the Pad based 3D Earthwork BIM design, topographic modeling, and earthwork volume calculation. In the case of a slope, the direction and inclination of the slope can be incorporated into the design. The point cloud data obtained from GPS survey and Laser scanning process which can be then used to create TIN (Triangulated Irregular Network) surface and ground mesh. It provides a 3D BIM design compatible with software like Autodesk Civil 3D and also with Machine guidance system. This paper discusses the importance of Pad based earthwork design with its practical site application and also presents a case study using Machine guidance. The results of experiments on construction projects show that this approach can be effectively used for earthwork operations.