Let us design a dredge to meet your needs!

General Types and Descriptions:

No two mining operations are the same. Thats why Supreme Manufacturing offers custom dredge design. If you can dream it, we can build it.


  • Depth capability.  They are typically designed for 200’ feet of mining depth.  There are several machines in service today digging more than 300’.  Deeper designs are possible.
  • Increase reserves and the ability to re-open existing properties that are already permitted
  • Increase land value
  • No loss of fines
  • Able to extract large size particles
  • Reduce material handling costs
  • Eliminate diesel use when designed for all electric
  • Reduce manpower
  • Increase efficiency
  • Improve material flow
  • Ease of re-sale with high residual value of equipment


An ideal application would be an alluvial deposit of sand and gravel found in glacial areas and river basins, typically with a deposit depth greater than 25 feet.  Another ideal location is near urban areas where deposits run deep and producer is surrounded by development.


  • Dewatering Systems - Most clamshell dredges are equipped with material dewatering systems consisting of a double/triple deck horizontal screen.  Top deck usually carries the larger gravel.  Bottom deck is the dewatering deck.  Size is dictated by customer needs and other equipment onboard (i.e. FSR, etc).
  • Fine Sand Recovery - This is a system to capture fine material to as small as 200 mesh.  Equipment required: vertical pump, cyclone, high frequency dewatering screen, support structure and piping.
  • Rake Grizzly - Positioned above the hopper. This option allows the operator to “rake” oversize material and clay to a barge or onboard crushing system. **This system is not compatible with deposits of flat rock.
  • Dump Grizzly - This grizzly is designed with square openings.  It is operated by hydraulic cylinders.
  • Onboard Crushing - The onboard primary crushing has become more popular.  Typically a jaw crusher is used, but some systems may utilize impact crushers.
  • Hydraulic Rock Breaker - Typically used in conjunction with an onboard crushing system.  This allows the operator to limit the size of material before sending it to the crusher and to clean the grizzly.
  • Spray Bar Systems - Used where deposits are high in fine material or clays.  These systems help wash out unwanted material.
  • Wash Down Systems - For washing the pontoon decks and conveyor transitions.
  • Material Pumping System - If replacing a hydraulic dredging system to maximize depth in a deposit… a customer may want to retain the existing land-based plant.  The clamshell system can be designed to accommodate a material pumping system.  This requires a change to the screening process.  Rather than a dewatering screen, we utilize a simple scalping screen, which screens at approximately 4”.  All minus 4” material is sent to a sump tank and pumped to the plant using a pump and floating pipeline.

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