Projects

Project Profiles

Marine Construction

Industrial/Commercial
Construction

Environmental Mitigation/
Reclamation/Habitat
Restoration

Heavy Civil/Earthwork

Dredging

Project Awards

Contract List
Download .pdf of all contracts

Project Detail

Project: Patrol Coastal Pier 21 and Berth Maintenance Dredging
Owner: Naval Amphibious Base, Coronado, CA
Start date: 10/31/1997
Finish date: 12/2/1998
Value: $4,043,793

Original project consisted of removing the existing pier, dredging a new mooring basin, and construction of a new boat ramp and pier. The existing material to be dredged was tested and determined to be too contaminated for offshore disposal, so we had to secure an upland disposal site for the 15,000CY of silty sand dredge spoils. The dredging operation consisted of a floating clamshell dredge loading into a material barge consisting of a wall enclosed flat barge. When full, the material barge was towed to an offloading wharf at Naval Station San Diego. Once moored, the material barge was offloaded via long-reach excavator and loaded directly into leak-proof, semi end dump trucks. Once loaded, the trucks hauled and dumped the dredge spoil at the approved upland disposal site. During the dumping and spreading operation at the upland disposal site, unexploded Navy ordnance was encountered. Based on our experience with unexploded ordnance in dredge material, we devised a plan to relocate the material to a new secure site. The material was then screened to remove the unexploded ordnance. Thereafter, the dredge spoils were safely and legally disposed of, as were 15 rounds of unexploded ordnance.

<  Back to Dredging Projects