Thomas Tredgold’s definition of Civil Engineering, may be one of the oldest definitions of Civil Engineering, states that, “Civil Engineering is the art of directing the great sources of power for the use and convenience of man”. During the old days, the role of the Engineer was considered extremely important as Engineers reduced the need for human labour and at the same time satisfied some basic physical and social needs in a hostile environment. This attitude eventually developed and the general public believed that the age-old troubles of starvation, disease, floods etc. could be overcome by the proper use of engineering and to some extent it was achieved by the construction of engineering structures such as dams, reservoirs, drainage schemes, communication and road networks.