Port Houston Project 11: What Shippers Actually Need to Know About the 46.5-Foot Channel

The Houston Ship Channel has carried more foreign tonnage than any other port in the United States for nine years running. Most shippers know that number. What they don’t always know is that the channel moving all that freight has been operating past its original design envelope for years — and the project that fixes it, Project 11, is the single largest infrastructure effort Port Houston has ever undertaken.

If you move freight through Barbours Cut or Bayport, Project 11 is going to change your operational math. This briefing walks through what’s actually being built, why it matters for the ships that call Houston today, and what a 46.5-foot channel means for drayage, warehousing, and the kind of terminal dwell times you should plan around in late 2026 and beyond.

What Project 11 Actually Is

“Project 11” is shorthand for the Houston Ship Channel Expansion Channel Improvement Project — the 11th major modification to the Houston Ship Channel in its 110-plus year history. It’s a joint effort between Port Houston (the local sponsor) and the U.S. Army Corps of Engineers, authorized in the 2020 Water Resources Development Act.

The project does three things, and it’s worth separating them because they affect different pieces of the freight chain:

1. Widens the channel from 530 feet to 700 feet along Galveston Bay (the lower reaches).
2. Deepens segments of the upper channel to 46.5 feet to match what the lower bay already has.
3. Builds new bird islands and ecosystem mitigation with dredged material — which is where a big chunk of the cost and timeline actually sits.

That last one is the piece most freight operators gloss over, but it matters because it’s what keeps the project on its environmental approvals and therefore on schedule.

Why the Existing Channel Is a Bottleneck

Here’s the thing that doesn’t show up in the marketing materials. The Houston Ship Channel is a two-way, single-lane waterway for most of its length. When ships exceeding a certain beam are transiting, the pilots have to implement one-way traffic restrictions — meaning outbound vessels queue while an inbound vessel makes the passage, or vice versa.

As container carriers moved to neo-Panamax and post-Panamax hulls to capture fuel economics on the Asia-to-Gulf all-water routes, those one-way restrictions started happening more often. By 2022–2023, the channel was seeing transit delays that were no longer rounding errors — they were measurable in the per-TEU cost of calling Houston.

The 700-foot widening solves that. Two beam-heavy container vessels can meet and pass without either one stopping. The time cost of calling Houston drops measurably, and the pilots can sequence calls more densely.

Operator’s note: I’ve watched pilots hold inbound traffic for 90+ minutes waiting for an outbound beam-heavy to clear. That’s 90 minutes of storage charges, 90 minutes of drayage appointment slippage, and 90 minutes of downstream dwell. Widen the channel and you don’t eliminate those moments — you drop their frequency by roughly an order of magnitude.

The 46.5-Foot Number — What It Actually Unlocks

Channel depth is always quoted at Mean Lower Low Water (MLLW) — essentially the worst-case tide reference. Houston’s authorized depth for the containerized reaches is being raised to 46.5 feet MLLW.

That number isn’t arbitrary. It’s the sweet spot for the current generation of Panamax-Plus and neo-Panamax container vessels — the 10,000 to 14,000 TEU class that increasingly dominates the Asia–Gulf trade via the expanded Panama Canal. Those ships need roughly 45 to 46 feet of draft fully laden. At the old 45-foot authorized depth, they were calling Houston partially loaded or waiting for favorable tides.

Here’s what that meant in practice for shippers:

• Tide-dependent scheduling. A vessel would plan its Houston arrival around a high-tide window, and if weather pushed it, the whole rotation slipped.
• Light loading. Carriers would short-load by 500–1,500 TEU on the leg into Houston to stay inside draft limits, which quietly raised the per-container rate.
• Split calls. Some services would discharge part of their Houston load at another Gulf port first to lighten the draft, then finish at Houston — doubling handling costs on that freight.

A fully authorized 46.5-foot depth kills all three of those workarounds. Carriers can deploy ships at full commercial draft, on schedule, every call. That compresses the cost curve for every container moving Asia → Panama → Houston, and it’s the structural reason Houston has been gaining share from Los Angeles/Long Beach on all-water Gulf routes.

Where Project 11 Actually Is Right Now (April 2026)

Project 11 is being executed in segments, not as a single construction push. This is deliberate — dredging the entire channel simultaneously would shut down commercial traffic, which isn’t an option for a port that handles more than 40 percent of U.S. Gulf containerized cargo.

The sequencing has been:

• Segment 1 (lower bay widening): Substantially advanced. The two-way passing capability through the lower Galveston Bay reaches is where the bulk of early completion work has landed.
• Segments 2 and 3 (upper channel deepening): In active dredging windows, with contractor mobilization staged around ship traffic. These are the reaches that most directly affect Barbours Cut and Bayport turnaround times.
• Beneficial use islands: Ongoing in parallel, because the dredged material has to go somewhere and the environmental approvals require it go into designated ecosystem-restoration sites.

The full completion target has moved around publicly — originally framed as 2025, then restated multiple times — and at this point any operator who quotes you a single “done” date is guessing. What’s more useful is understanding which operational benefits go live progressively as each segment finishes.

What Changes for Drayage and Warehousing

This is the piece shippers actually care about. Channel deepening is exciting for the carriers. For the companies routing containers through Houston, it shows up in three places:

1. Appointment density at the terminals increases

When vessel dwell at berth drops — which it does when you can handle larger ships on a predictable schedule — the terminals can run more trucks through the gate in the same window. That means drayage appointment availability improves, especially at Barbours Cut, which has historically been the tighter of the two container terminals for appointment slots.

Practically: if you’re an importer who’s been losing appointment windows to the 48-hour scramble, post-Project 11 that pressure eases. Not because the terminals got bigger, but because the rate of turn improved.

2. Transloading windows become more consistent

One of the quiet effects of the current channel bottleneck is that transloading operations across the Houston metro have to plan for vessel arrival uncertainty. If your west-bound transload has to catch an outbound truck window, and your container is stuck on a vessel that’s tide-waiting at Galveston, you miss the window and you pay twice.

When vessel arrivals tighten up against their scheduled ETAs — which is the direct downstream effect of removing tide dependency — transload window planning gets sharper. You can commit to outbound truck and rail appointments with more confidence, and you stop eating the cost of missed connections.

3. The Bayport vs. Barbours Cut calculus shifts

These two terminals are not interchangeable. Barbours Cut is closer to the Gulf, older, tighter, and handles a mix of vessel sizes. Bayport is newer, deeper, and purpose-built for the larger classes. As Project 11 progresses, the economics of routing a given booking through Bayport vs. Barbours Cut will start to shift — larger vessels will increasingly prefer Bayport because of its cleaner draft and landside layout, while smaller feeders and certain trade lanes will concentrate at Barbours Cut.

If your 3PL is defaulting your bookings to one terminal without actually running the math on which one is the better call for your specific lane, you’re leaving money on the table. This is something we calibrate on every inbound for our Houston clients.

The Honest Caveats

I’m not here to sell you on Port Houston. Project 11 is a major, real infrastructure win. It’s also subject to the same realities that govern every USACE-partnered dredging project in the United States:

• Schedule is weather-sensitive. Gulf Coast hurricane season compresses dredging windows. One bad season can push completion estimates by months.
• Benefits aren’t uniform. A shipper whose lane bottleneck is the I-10 corridor between Houston and Dallas isn’t going to feel Project 11 in their per-container cost — the pain point is landside, not waterside.
• Carrier deployment decisions lag infrastructure. Even after the channel hits full authorized depth, it’ll take 6–18 months before carrier alliances restructure service loops to take full advantage. The tide-dependency workaround habits don’t disappear overnight.

That’s not a knock on the project. It’s just the difference between infrastructure is complete and shippers are actually capturing the benefit, and those are two different dates.

What to Actually Do About It

If you’re routing freight through the Port of Houston in 2026 and 2027, the playbook I’m giving my clients looks like this:

• Ask your carrier which service loops are being re-deployed against Project 11 benefits. This is not a confidential question. Any ocean carrier sales rep can tell you whether their Asia–Houston service is being upgraded to a larger class post-deepening. If they can’t, that’s a data point about whether they’re actually paying attention.
• Re-run your Barbours Cut vs. Bayport routing assumptions at least quarterly through 2026. The relative economics are moving. If you set a routing default in 2023 and haven’t revisited it, you’re almost certainly suboptimal now.
• Negotiate your drayage capacity against the post-improvement appointment density, not the historical one. Drayage providers who’ve been working Houston for a decade know the old appointment-scarcity math. The capacity conversation should reflect where the channel is heading, not where it was.
• Pre-position warehouse capacity inside the metro, not outside. The Houston I-10 / Beltway 8 corridor is where the real value capture happens. The further out you go for cheaper rent, the more you eat the efficiency gains in extra drayage miles.

Bottom Line

Project 11 isn’t a flashy cut-the-ribbon story. It’s a quiet, multi-year re-engineering of a waterway that already handles more U.S. foreign tonnage than anyone else. Its benefits are going to show up in the cost sheets of shippers who actually pay attention to their Houston routing — and they’re going to be invisible to everyone else.

If you’re moving containers through the Gulf, the right question isn’t “is Project 11 done yet?” It’s “what’s my Houston routing going to look like when it is?”

We’re already running that math for the clients we operate for. If you want us to run it for yours, there’s a form at the bottom of every page on this site, and there’s a phone number that reaches an actual operator. Over and out.