Carriers concentrate on Los Angeles–Long Beach, narrowing gateway choices for shippers

# What happened

At the same time, the Port of Oakland and the Northwest Seaport Alliance (Seattle and Tacoma) experienced significant volume declines. Oakland's container throughput fell nearly 10% year on year in August, with imports down about 15%. The NWSA saw container throughput fall more than 8% in August, led by a drop in imports. Earlier months showed even larger declines, including a nearly 15% slump in the NWSA in June.

# Why carriers shifted capacity

Two practical drivers are cited in the reporting. First, an extended peak season and front-loading by shippers pushed more cargo into southern California. Second, Panama Canal transit restrictions caused by low water levels diverted some services and cargo flows, increasing demand at San Pedro Bay. Carriers responded by consolidating sailings and reducing the number of port calls at underused gateways.

The result: vessel calls at Oakland decreased, and carriers concentrated capacity where volumes and demand were strongest.

# What this means for shippers

Shippers now face fewer physical routing choices on the US west coast. When carriers reduce sailings or skip ports, cargo owners have less ability to spread risk across different gateways. That has three concrete consequences:

• Greater exposure to congestion. Funneled traffic increases the chance of terminal capacity strain, longer dwell times, and downstream delays.

• Weakened negotiation leverage. Using a single dominant gateway can concentrate volumes with fewer carriers, limiting shippers' ability to play providers against each other for better rates or service.

# How shippers are responding

Operational responses include diversifying carriers and routing where possible, and exploring inland port and transshipment alternatives. However, diversifying across more carriers can dilute the rate advantages of concentrated volumes and is not a complete hedge if carrier schedules and port calls are being trimmed industry-wide.

# Broader capacity dynamics to watch

• Drayage and intermodal capacity: Truck and rail capacity pressures can compound port congestion. Industry signals show drayage constraints affecting decisions about over-the-road conversions and pricing.
• Dwell time trends: Rising terminal dwell times at busy ports can feed back into planning and carrier choices.
• Panama Canal and global disruptions: Canal constraints and geopolitical issues can quickly redirect flows and change carrier deployment patterns.

# Practical takeaways for cargo owners

• Map alternative gateways and inland routes now, not after a disruption. Identify realistic diversion ports and the inland transport providers that can serve them.
• Assess the trade-off between consolidation and diversification. Concentrating volume can secure better rates but increases operational risk if carriers re-route or reduce calls.
• Monitor terminal dwell times and drayage availability as early indicators of system stress.
• Consider multi-hub sourcing and regional inventory buffers to reduce single-gateway dependence.

Shippers that act on these points will have clearer options when carriers adjust schedules and port calls in response to shifting global and regional flows.