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PMA neither loaded nor unloaded ships over the weekend, leaving yard and gate operations up to individual terminals.
Draymen say they could be forced out of business by huge demurrage and detention bills.
Ports using contingency anchorages as number of ships waiting for berths grow.
The Maersk Garonne was pulled free early Saturday morning, just hours after running aground.
On-time performance is being hampered by congestion at West Coast ports.
DHS funding crisis means the agency will have to focus resources on border security, cargo clearance