Dredging is the excavation of material from the bottom of a body of water and deposited elsewhere typically for keeping waterways navigable. This material often times includes silt or sludge. Dewatering is the process of removing water from solid material such as a wet area or from an existing body of water. Our client was dealing with water quality issue and received recommendation to increase the pond depth. After checking the local government regulations and originally approved plans our firm found that there were no obstacles to dredge except for one major problem.
After completion of topographic and bathymetric surveys – we found out that due to seepage and underwater slope failures it was severely eroded. Further undermining by dredging without proper stabilization would cause sudden collapse of lake bank, creating dangerous situation for dredging contractor, people and vehicles in the immediate vicinity of shoreline.