MDG Provides innovative solutions to successfully restore contaminated waterways, ash ponds, and wetlands. Using the latest technologies, we can dredge to precise elevations while maximizing production and minimizing total water volumes. We understand each client’s unique challenges and constraints and ensure that we deploy the best team and equipment for the project.

Using the latest positioning technologies and environmental digging buckets, we can outperform traditional environmental buckets in both hard-bottom and maintenance material conditions.

Handling contaminated sediment is a science. MDG can manage unit costs by utilizing the best method for our customers’ projects. Our CCR Closure market expertise uses our Dredging, Dewatering, and Material Separation Services. 

MDG Construction offers the following dredging & dewatering services:

  • Hydraulic dredging
    • Environmental remediation
    • Ash pond clean closures
    • Maintenance dredging
    • New work dredging

  • Mechanical dredging
    • Environmental clamshell dredging
    • Maintenance and new work dredging
    • Precision excavator dredging

  • Separation and Dewatering
    • Paste plant fabrication and operation
    • Water treatment with flocculants and polymers
    • Dredging and liquids/solids separation services using portable filter presses
    • Geotextile Tubes facilitate sediment dewatering through porous geotextile fabric. The dewatering process is typically aided by adding polymer to produce a filtrate that is clear. 
  • Hydraulic barge unloading
    • Dredge slurry transportation

–       Additional services –

    • Wet material management of Fly ash and CCR (Coal Combustion Residuals)
    • Wet excavation, transfer, and placement into onsite landfill
    • Water and dredge material pumping systems

DREDGING APPLICATIONS

COAL COMBUSTION RESIDUALS (FLY ASH)

Specializing in the hydraulic and mechanical excavation of fly ash containment ponds, MDG can transfer medium to large volumes of fly ash to final containment sites. Breaking away from traditional methods, MDG provides customized fly ash remediation solutions for each project that are environmentally sound, community friendly, cost-efficient and risk reducing. Our team is committed delivering optimal results through the engineering, procurement, construction and management of each project’s life.

POWER/ENERGY

Power plant operators can depend on MDG for sediment removal in mission critical water flow processes. Power plants require an uninterrupted upstream source of water for both power generation and process cooling. With downstream these same types of sediments must be removed to allow for channel navigation and other requirements. MDG can remove fly ash from coal-fired power plants and sediment accumulation from hydroelectric dams, restoring storage capacity limits. We customize our dredges for each project’s specifications including dredging depth, material removal rate, and automation.

ENVIRONMENTAL

MDG has a history of being utilized for the biological cleanup of harbors, rivers, and lakes. Additionally, MDG can remove industrial chemical runoff and submerged contaminated sediments from natural and man-made waterways and spill areas. As an industry leader in environmental remediation, our state-of-the-art equipment allows us to design our dredges to minimize, if not eliminate, further contamination risks.

MINING

For mining and tailings management applications, water is an essential resource. By processing the material in tailings ponds, MDG makes water available for recycling. Dewatering mine sites can assist with production schedules by using a fleet of self-priming diesel pumps. MDG has the experience necessary to control water levels of underground water bodies that are close to tailings dams.

INDUSTRIAL

MDG’s systems solutions are the commercial standard for industrial lagoon maintenance. When sediment holding areas reach or exceed their design capacity limits, experts turn to MDG for the most efficient and cost-effective method to reclaim the site’s original storage capacity. MDG’s dredge system allows for efficient and cost-effective storage capacity reclamation. Whether the material is benign or contaminated, MDG’s dredging systems can successfully restore these industrial lagoons. Our specialization extends to explosion-proof dredges and wireless dredge automation.