1) Detailed bridge site survey.

2) l-section of river on 500 m upstream and downstream side.

3) Existing structure survey.

4) Catchment area survey by triangulation.

5) Photographs of stream and existing structure.

6) Carry over of h.f.l. in case site is on upstream side.

7) Information about nature of flow and collection of historic data regarding h.f.l from local people.