10--Miami Harbor Construction Dredging Phase 3, 50-Foot Project, Cut-1, Cut-2, Cut-3, Fisher Island Turning Basin, Fisherman's Channel, Lummis Island Turning Basin and Local Sponsor Berthing Areas, Miami-Dade County

The project work consists of construction dredging to provide for the Federally authorized project improvements and Local Sponsor Berthing Areas of Miami Harbor, Florida. To facilitate the authorized project, the Phase 3 deepening contract will dredge the following features: (1) Cut-1 to a depth of 52 feet MLLW plus one foot allowable overdepth, including the widening of the outer portion of the cut from 500 feet to 800 feet; (2) Cut-2 to a depth of 52 feet MLLW plus one foot allowable overdepth; (3) Cut-3 to a depth of 50 feet MLLW plus one foot allowable overdepth, including a new turn widener at the intersection of Cut-3 and the Fisher Island Turning Basin; (4) Fisher Island Turning Basin to a depth of 50 feet MLLW plus one foot allowable overdepth, including an expansion of the turning basin from 1200 feet to approximately 1500 feet; (5) Fisherman's Channel to a depth of 50 feet MLLW plus one foot allowable overdepth, including a shift of the channel by 60 feet to the south and the widening of the channel by 40 feet to south from 400 feet to 440 feet; (6) Lummus Island Turning Basin to a depth of 50 feet MLLW plus one foot allowable overdepth, including a reduction of the turning basin from 1600 feet to approximately 1500 feet; and (7) Port of Miami Berthing Areas along Fisherman's Channel to a depth of 50 feet MLLW plus one foot allowable overdepth, including an expansion of the berthing areas by 60 feet south into the existing Federal channel. Total quantity to be dredged from the Federal Channel is approximately 5 million cubic yards (cy) and from the Berthing Areas is approximately 200,000 cy. All dredged material will be placed in the ODMDS located an average of 4.5 statute miles from the dredging location, the Julia Tuttle Seagrass Mitigation Area located an average of 7.0 statute miles from the dredging location, and the two Offshore Artificial Reef Areas located an average of 2.4 statute miles from the dredging location. The contract will be divided into a Base and Two Optional Items. The Base work includes dredging of Cut-1 and Cut-2 as well as the construction of the Seagrass and Artificial Reef construction; Option A covers the dredging of Cut-3 Station 0+00 to Station 12+00 and Fisherman's Channel from Station 17+00 to the end of the Lummus Island Turning Basin as well as the dredging of the berthing areas adjacent to these reaches where present; Option B covers the dredging of Cut-3 Station 12+00 to Fisherman's Channel Station 17+00 as well as the dredging of the berthing areas adjacent to these reaches where present. In addition to dredging, the work involves drilling and blasting (includes protected species observers, fish-kill monitoring, protected species watch plan activities, and vibration monitoring/control activities), turbidity/sedimentation monitoring (includes pre- and during construction environmental monitoring of adjacent seagrass beds and hardbottom communities for direct and indirect impacts associated with construction activities), endangered species observers (hopper dredges only), dedicated manatee observers (clamshell dredges only), coral relocation, and seagrass and artificial reef mitigation areas construction. Magnitude of construction is between $100,000,000.00 and $250,000,000.00. The total Period of Performance is 757 calendar days.