Features of the Confined Disposal Facility (CDF) Photos
Aerial photograph of Indiana Harbor and Canal Confined Disposal Facility in 2011 prior to placement of dredged material to the CDF. [Source: USACE]The CDF cells isolate and contain dredged material. An interior dike (shown here) divides the CDF into two cells, an east cell and west cell, approximately 45 acres each. [Source: USACE]Each CDF cell contains a decant structure that is used to regulate water level in the cell. [Source: USACE]A containment dike encloses the CDF cells to contain the dredged material. Clay dikes at the IHC CDF site consist of a structural clay fill which provides stability for the containment of the dredged sediments and serves as a low hydraulic conductivity barrier. [Source: USACE]An administration building and garage were constructed in 2011. [Source: USACE]A wastewater treatment plant is located on the south side of the site. The plant is used to treat and discharge CDF water into the canal. The discharge concentrations are established in an NPDES permit issued to USACE by the Indiana Department of Environmental Management (IDEM). The plant is designed to treat contaminants of concern in the water, which include organic compounds, ammonia, metals, total suspended solids (TSS), and oil and grease. [Source: USACE]A crane pad abutting the Lake George Canal. Under drains discharge water to the Gradient Control System which eventually discharges into the CDF. [Source: USACE]A decontamination pad is used to decontaminate vehicles and equipment. The drain discharges the contaminated water to the Gradient Control System which eventually discharges into the CDF. [Source: USACE]The south cutoff wall utilizes a low hydraulic-conductivity sealant to prevent the outward migration of groundwater from the CDF site to the Canal. [Source: USACE]
