Pier 11 South Berth Expansion and Maintenance Dredging

Expansion and Maintenance Dredging project for the areas surrounding Piers 11 South, Pier 5 North, and Pier 6 North at Naval Station Norfolk (NSN) area of responsibility: - Expansion of Pier 11 South and Maintenance Dredging at Piers 5 and 6 North at Naval Station Norfolk (NSN). This project will be done in order to re-establish the minimum required harbor depths needed for access by the Naval vessels that use these facilities: - Installation, material, labor, transportation and equipment necessary to provide new dredging of Pier 11 South Berth Expansion Area and maintenance dredging for Piers 5 and 6 North. Maintenance Dredging of the outer berths of Piers 5 and 6 North and Non POL contaminated material from the Berth Expansion Area may be dredged via conventional clamshell bucket, transported via sealed scrow/barge and deposited into the CDMMA Rehandling Basin or pumped via hydraulic unloader to an upland cell of the Craney Island Dredge Material Management Area (CDMMA) or dredged via hydraulic cutter head dredge and pumped directly upland cell of CDMMA. Location of deposition within Craney Island Project Site is subject to change and should be coordinated with the Army Corps of Engineers before dredging begins. - A portion of Pier 11 South Berth Expansion Area contains sediment contaminated with Petroleum, Oil and Lubricant (POL) material (will be shown on drawings/plans). The POL contaminated material shall be dredged via conventional clamshell bucket and disposed at an upland facility as specified herein and on drawings/plans. - Dredging from on-site location and placement of sandy material to be used as side-slope capping (will be shown on drawings/plans) shall be done via conventional clamshell bucket. - Additional work as shown on the drawing/plans and specification shall be performed, including but not limited to, placement of sandy capping material dredged on-site (will be shown on drawing/plan) and rip-rap armor stone layers along southern and eastern side slopes of Berth - Expansion Area to cap disturbed POL contaminated material remaining in place and removal and disposal of debris remaining after the past demolition of steel sheet piling cofferdam break water and timber breakwater structures. Remaining debris may include steel sheet piling stubs and timber piling stubs, concrete rubble and rip-rap stone. - Adequate, efficient, and secured facilities are required to maintain Atlantic Fleet readiness by providing adequate facilities for homeported and visiting ships at Naval Station Norfolk. U.S. Navy ships require adequate water depths to berth at while entering and exiting berthing spaces. It is imperative to main required draft depths for naval vessels to prevent damage and unscheduled maintenance requirements to the ships.

Division 35 -

Waterway and Marine Construction, Common Work Results for Waterway and Marine Construction, Waterway and Marine Construction and Equipment, Dredging, Marine Construction and Equipment.