FY23 Baltimore Harbor and Channels Maintenance Dredging, Maryland Channels, Chesapeake Bay, MD

***** ABSTRACT OF BIDS ***** **** AMENDMENT 0001 21 MAR 23 **** FY23 Baltimore Harbor and Channels Maintenance Dredging, Maryland Channels, Chesapeake Bay, MDThe project consists of maintenance dredging approximately 1,500,000 cubic yards (cy) from the deep-draft federal navigation channels serving the Port of Baltimore. The work is to be performed between April 2023 through August 2023.The dredging depth varies by channel segment and ranges from 35 feet mean lower low water (ft MLLW) to 50 ft MLLW with an additional 1 foot of allowable overdepth. Approximately 1,100,000 cy will be dredged from the Maryland approach channels (Tolchester Channel, Brewerton Channel Eastern Extension, and Craighill Angle) and placed at the Paul S. Sarbanes Ecosystems Restoration Project at Poplar Island. Approximately 350,000 cy will be dredged from Harbor channels (Brewerton Angle) and placed at the Cox Creek Dredged Material Containment Facility.The estimated magnitude of construction is between $25,000,000.00 and $100,000,000.00. The work areas are within heavy commercial waterways ? active shipping channels supporting the Port of Baltimore. All work activities performed within the Federal navigation channels will need to be coordinated with the ongoing shipping traffic. The equipment required for this work commonly consists of two 30 plus cubic yard clamshell dredges, one 24 ? 30-inch hydraulic unloader, six to eight large tugs, six to eight 2,500 ? 6,000 cubic yard material scows, a drag bar and barge, and appropriate attendant plant and pipeline. The material will be dredged by clamshell/bucket and scow. The period of performance is 120 calendar days from receipt of Notice-to-Proceed.