Definition - What does Reconnaissance mean?
Reconnaissance is an integral part of site investigation and is carried out at the preliminary stage before other stages are begun. Reconnaissance involves a field trip to the site where further investigation is to be carried out. It gives details of landforms and other structures that are above ground which may form an obstacle for an installation.
The data derived from a reconnaissance survey enables engineers to design feasible routes with proper line and grade.
Trenchlesspedia explains Reconnaissance
Reconnaissance survey also involves studying existing survey maps and contour maps. These can be used to mark out natural formations such as hillocks, utility structures and other sub-surface structures that have been surveyed before.
Observations made during site reconnaissance include:
- The topography of the land including water bodies, estuaries, reserved land and quarries.
- Slopes angles and orientation.
- Presence of structures, heritage structures, trees, and utility lines.
- Presence of hazardous industries or waste disposal sites that could be a potential public health hazard.
- Areas with loose soil, patches of soil discoloration, excess growth of vegetation or foul smell.
- Comparison of the previous plans with current situation i.e. addition of new structures or utility lines.