Onondaga Lake Remedial Design Elements Remedial Design ...

DRAFTRemediationAreaSedimentManagementUnit (SMU)Key Characteristics andConsiderationsThree major tributary systems(Onondaga Creek, Harbor Brook andLey Creek)Navigation into Onondaga Creek3 ft3 ft3 ftOne cubic yard isequivalent to a cube thatis 3x3x3 ft.EFSMUs 7 and 6Small portionsof SMU 5SMU 8IRM Barrier wall along shoreline nearmouth of Harbor BrookWetlands at mouth of Harbor BrookSYW-12 wetlands along shorelineDischarge from Metro wastewatertreatment facilityActive railroad track along shorelineMedium energy areaSmall areas that require dredgingProfundal areaDetails of remedy will be included insubsequent design documents.In addition to the remediation areas described above, the ROD identifiestwo distinct areas within the lake where Comprehensive EnvironmentalResponse, Compensation, and Liability Act (CERCLA) contaminants donot occur at levels that warrant active remediation, but where habitatimpairment due to stressors has been identified as a concern -- theshoreline of SMU 3 and the calcite and oncolite deposits in SMU 5.Habitat enhancement activities planned to stabilize the RemediationArea B (SMU 3) shoreline are described following the description ofrestoration in Remediation Area B. The habitat enhancement activitiesfor Remediation Area F (SMU 5) are described in Section 5.3.10.1.4 Consent Decree and Record ofDecision (ROD) RequirementsAs a key component of the restoration program specified for OnondagaLake, this Habitat Plan will meet the requirements specified in thedecision documents for the lake. A general overview of the in-lakecomponents of the selected remedy set forth in the Consent Decree issummarized below:• dredging up to an estimated 2,653,000 cubic yards ofcontaminated sediments and wastes;• placement of an isolation cap over an estimated 425 acres inshallow water areas (littoral zone);PARSONS | Remedial Design Elements for Habitat Restoration 23