Maintenance Operations of the Federal Navigation Channels and Structures at Bolles Harbor, Michigan

Maintenance Operations of the Federal Navigation Channels and Structures at Bolles Harbor, Michigan PDF

Author: CORPS OF ENGINEERS DETROIT MI DETROIT DISTRICT.

Publisher:

Published: 1978

Total Pages: 83

ISBN-13:

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Dredging and disposal activities would have temporary adverse effects on water quality, organisms living in and on the bottom sediments in affected areas, aesthetics, recreational fishing, and the ability of the area to support aquatic life. Beneficial impacts of maintenance operations include continuance of the existing local economy through preservation of navigation-dependent commercial enterprises and through recreational benefits available to regional residents and tourists. Water quality may be temporarily impacted by several of the proposed activities. The impacts would essentially be limited to turbidity and the possible release of nitrogen compounds to the waters during dredging and disposal operations. Recreationalists may be temporarily inconvenienced. In addition to maintenance dredging by bucket or hydraulic pipeline dredge, other alternatives include: (1) discontinue maintenance dredging; (2) dredge the harbor to a lesser depth; (3) alternative dredge types; and (4) dredge only the critically shoaled areas. Implementation of the alternatives could cause economic or social impacts in the Bolles Harbor area. Alternatives to the proposed disposal methods are enumerated. The only true alternative to maintenance of structures related to the navigation project is to terminate maintenance.

Draft Environmental Assessment/environmental Impact Report

Draft Environmental Assessment/environmental Impact Report PDF

Author: United States. Army. Corps of Engineers. San Francisco District

Publisher:

Published: 2015

Total Pages:

ISBN-13:

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The United States Army Corps of Engineers (USACE) and the San Francisco Bay Regional Water Quality Control Board (Regional Water Board) have prepared a Draft Environmental Assessment (EA)/ Environmental Impact Report (EIR) to address the potential environmental effects of the maintenance dredging of federal navigation channels in San Francisco Bay and the associated placement of dredged materials from 2015 to 2024. The USACE proposes to continue maintenance dredging of the federal navigation channels in San Francisco Bay to maintain the navigability of the channels. The Regional Water Board proposes to issue a Clean Water Act Section 401 water quality certification, and may also issue waste discharge requirements, for USACE's continued maintenance dredging operations in San Francisco Bay. The Draft EA/EIR evaluates in detail the potential environmental impacts of four alternatives: the No Action/No Project Alternative, the Proposed Action/Project, and two reduced hopper dredge use alternatives. The analysis will support decision making by USACE, the Regional Water Board, and other agencies regarding implementation of the proposed project, and will satisfy compliance with the National Environmental Policy Act, the California Environmental Quality Act, and other pertinent laws and regulations. Additionally, for those maintenance dredging projects that involve discharge of dredged or fill material into waters of the United States, the EA/EIR is intended to serve as the Section 404(b)(1) analysis for maintenance dredging in compliance with the Clean Water Act. Under NEPA, USACE determined that the proposed activity would not significantly affect the quality of the physical, biological, and human environment under any of the alternatives. The USACE's Draft Finding of No Significant Impact is included with the Draft EA/EIR. Under CEQA, the Regional Water Board determined that the No Action/ No Project Alternative and Proposed Action/Project would have significant project and cumulative impacts to delta smelt and longfin smelt from entrainment. The Regional Water Board determined that these impacts would be reduced to less than significant under the reduced hopper dredge use alternatives with minimization of hopper dredge use, implementation of the minimization measures, and compensatory mitigation proposed under these alternatives.