Inactive

FY 20 Maintenance Dredging for Pier 4 (West Side) for the Government sites at the Philadelphia Navy Yard in the Public Works Department Pennsylvania area of responsibility. Maintenance dredging of app... FY 20 Maintenance Dredging for Pier 4 (West Side) for the Government sites at the Philadelphia Navy Yard in the Public Works Department Pennsylvania area of responsibility. Maintenance dredging of approximately 150,000 cubic yards of sediment, using a sealed environmental clamshell bucket. Dredging for west side berthing area of Pier #4 is to support the safe mooring and decommissioning of various Naval vessels. Pier #4 is at the Naval Support Activity Mechanicsburg, Philadelphia Navy Yard Annex and is being used to decommission various US Naval vessels. For the river pilots to be able to safely maneuver vessels into their berths and to ensure that tidal cycles will not cause sediment accumulation around the hulls making final removal very difficult, the berths need to be dredged as follows; 1. 0 feet to 250 feet from the West side of Pier #4 dredge to a depth of -37' MLLW Minimum (-39’ MLLW Maximum) 2. 2. 250 feet to 400 feet from the West of Pier #4 dredge to a depth of 28' minimum MLLW Minimum (-30’ MLLW Maximum) One of the following two disposal sites are proposed to be utilized: A) Dredged materials shall be transported by bottom dumping barge or scow and disposed within the Weeks Marine Whites Rehandling Basin, located in Logan Township, Gloucester County, New Jersey. B) Dredged materials shall be placed in barges and hydraulically un-loaded at the Waste Management Corporation Biles Island disposal facility located in Morrisville, Bucks County, Pennsylvania. The project schedule will allow for dredging work to be performed 24 hours/7 days per week and will require a minimum daily production rate of 5,000 CY per day.