Fly Ash Dredging

We provide Fly ash consulting and removal services

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When coal is burned, toxins in the coal are released into the smokestack. With modern air pollution controls, airborne toxins are captured through filtration systems before they can become airborne, and contained in fine ash called coal ash, fly ash, or coal combustion waste then stored either wet or dry.  A power plant that operates for 40 years will leave behind 9.6 million tons of toxic waste.  Often the owner will declare bankruptcy and leave the cleanup to the municipality. 




Because fly ash settling ponds eventually give away and pour out into nearby rivers or contaminate groundwater it is critical to dredge out the fly ash before it becomes a larger public health problem Fly ash is a very fine powdery material, with a consistency similar to flour, composed mostly of silica, like sand.

Coal Fired Powerplant Fly Ash Cleanup

According to EPA regulations, there are multiple ways to close out fly ash ponds through:


  • Capping
  • Dewatering and/or stabilizing
  • Consolidating into a new landfill
  • Disposing off site
  • Converting to wetlands

While dredging the site ongoing testing must be conducted for safety

  • Surface water
  • Drinking water
  • Groundwater
  • Sediment
  • Stormwater
  • Natural Resource Damage Assessment (NRDA)
  • Ambient air

Fly ash management and use in the United States is regulated by both state and federal agencies. The 1.05 billion tons of coal burned each year in the United States contain 109 tons of mercury, 7884 tons of arsenic, 1167 tons of beryllium, 750 tons of cadmium, 8810 tons of chromium, 9339 tons of nickel, and 2587 tons of selenium.

Is Fly Ash hazardous?

Fly ash itself is inert, though it may contain other substances that occur naturally in coal, such as arsenic, cadmium, lead, mercury, selenium. It is used in many building products like cement, mortar, stucco, and grout. Contact with wet coal fly ash does not present a serious health risk. Direct skin contact may cause localized irritation and breathing small amounts of fly ash for a short period of time is unlikely to be a health concern. Washing affected areas and removing and washing clothing are simple steps to take to remove the irritation.

Is the air safe around Fly Ash?

Breathing airborne particulates including fly ash over long periods of time can irritate the respiratory system. People with existing lung diseases such as bronchitis, emphysema, and chronic obstructive pulmonary disease (COPD) should avoid breathing coal fly ash dust. (Tennessee Valley
Authority, 2013)

Traditional Fly Ash Dewatering

Fly Ash Dewatering Process

Our Updated Fly Ash Methodologies 

  • Dredging, sluicing, separating, treating
  • Wet ash to separations plant
  • Ash dewatered to 30% moisture
  • Water returned to pond to be used in further sluicing
  • Water treated and sent to outfall

Water treatment – NPDES Compliant

  • Total suspended solids
  • pH
  • Metals

Industries Beyond Fly Ash

  • Oil and Gas
  • Heavy Civil
  • Tunneling
  • Horizontal Drilling
  • Quarries
  • Industrial Waste and Product Streams

Unique Features of our Solids Separation Treatment for Fly Ash

  • Eliminates traditional dewatering of the pond
  • Reduces the amount of water to be treated
  • Water to outfall will meet all discharge permits
  • Provides a dry transportable ash directly
  • Can separate fly ash from bottom ash
  • Reduces time required for closure operation
  • Manage X000 CY/Day of ash
  • Increases safety

Photos of our System in Action 

Solids Dewatering Fly Ash

Visit our fly ash dredging consulting and dewatering consulting pages for solutions for your environmental project.


Contact us about dredging consulting, equipment, pumping and dewatering to meet your contract requirements.