Brennan has developed methods for rapid dewatering to keep pace with the dredge. This process also has several options that can be combined to accomplish project-specific goals. The method of dewatering is determined by material type, spoils area footprint, and dredge production.
There are two types of dewatering processes: passive dewatering and active dewatering.
Settling ponds will allow the material to settle over time. Depending on the sediment characteristics, this process can be one of the most cost effective, but also requires the most area. This is because the material is given time to settle out of the water. This can happen quickly for coarse materials such as sand and gravel, but can take longer for fine sediments.
Active dewatering is the process in which water is separated from the slurry with the use of mechanical equipment that can speed the process. This is often used when space is limited and material needs to be unloaded quickly to keep production moving forward. There are several methods to actively dewater dredge spoils. Brennan can help determine and implement which method best fits each project. Each method is determined using dredge material properties, laydown area, and production rates.