Services

Lagoon Cleaning and Lagoon Dredging Services in Manitoba, Alberta & Saskatchewan

A: The Dredging Process

As dredging requires working with the unknown, Roy & Sons Dredging Services have made it a mandate to perform an on-site in cell assessment on the project prior to quoting an estimate. On-Site In-Cell Evaluation includes Pinpointing areas of concern Evaluating the lagoon and surrounding area Recommending solutions for preventative maintenance Discuss environmental concerns and options for safe removal of the slurred material Recommend an appropriate location for a drying bed.​

B: The Dredging System

Our dredging system operates as outlined below:

  • The Dredger, is equipped with an eight foot cutterhead which increases the dislodging force of the material. The cutterhead will reach depths up to 15 feet. The hydraulic centrifugal pump provides the dislodging and lifting force removing the material in a liquid slurry form. Liquid slurry is pumped through a series of pipes and hoses. The dredge floats on pontoons and requires approximately 2 feet of effluent for floatation as well effluent to slur the solid material. Cells must have at least five feet of effluent for dredging which will allow the slope required for launching of the dredge from the banks.
  • The dredge operates on a traversing cabling system anchored to two trucks, to ensure accurate removal of material. The traversing cabling system is moved every 4 to 6 feet depending on depth of material, overlapping 2 feet to capture the falling in material.
  • The dredge is capable of removing a foot to a foot and a half of material in a pass. Areas around the inlet pipe which is built up by a mound usually has a depth of five to six feet of material and will require backing up the dredge and slicing off the material until all the built-up material is removed. Depending on the design of the inlet pipe in some projects it is essential to enter the cell with the aid of a dry suit when dredging at the pipe to ensure material is removed successfully without damaging the pipe.
  • The dredging application only requires effluent to slur the material and in most cases when the project has been completed, the effluent levels in the cells only drops by six inches.