The contour survey should be carried out before starting any project work.
On a contour map, the layout of all the building of the project is plotted.
Plinth/parking levels of the buildings, road levels, considering all storm water aspect, drainage levels etc. are decided with respect to all the plot levels with the help of a contour map.
Insist that the Architect/Plumbing Consultant and all other consultants should write R.L.s of each structure.
Contour map is useful for the following:
- To know the overall topography of land or plot.
- To decide the parking/plinth levels of each building.
- To decide all internal roads levels.
- To decide and design complete the drainage system for the entire project, considering natural slopes of the ground, invert levels of nearby nalla, drainage chamber etc. with minimum excavation and therefore, minimum cost.
- To reduce the cost of excavation and filling for roads/plinths etc. considering cutting, filling quantities at initial stages while planning and designing the building.
- To decide the levels of all development works such as garden/swimming pools, recreation facilities, septic tank, underground water tank etc.
