Since 1874, a boat on the Detroit River has passed mail to freighters that never stop, hauled up in a bucket on a rope; it has its own ZIP code: 48222

Most post offices stand still. This one doesn't. On the Detroit River, a little boat named the J.W. Westcott II chases after giant freighters, pulls up next to them while both are moving, and passes mail up in a bucket with a rope. In June 2024, the United States Postal Service marked 150 years of this unusual service with an official celebration in Detroit, calling the boat itself the world's first non-military floating ZIP code.

The rowboat that became a family business

The story begins in 1874 when a young captain, John Ward Westcott, established a rowboat on the Detroit River to deliver messages to passing ships. Westcott grew up in a family of boaters. The Atlas Obscura feature on the company says his parents were the first couple married on a steamer on the Great Lakes, and Westcott himself became the youngest captain on freshwater in 1869. And just five years later he started taking messages to ships. Before ship-to-shore radio, crews had to figure out which dock they were headed to next.


That small service turned into a company. The business that Westcott founded became an officially recognized US Postal Service mailboat in 1948, and this relationship continues to this day for 76 years, based on the information provided by the USPS. Currently, this company is owned by Jim Hogan, who is the great-grandson of Westcott and the fourth generation of his family to manage the company. The boat that does the daily work, the J.W. Westcott II, was built in 1949 and still bears that unusual floating ZIP code, 48222.

Why this river needed its own post office

The Detroit River is not just an ordinary stretch of water. It acts as a border between the United States and Canada and has had commercial shipping since the 1820s. A scientific report by the U.S. Geological Survey says it's one of the busiest navigation centers in the country, which helps explain why it was worth creating a mail service built specifically for passing ships. But one reason these ships can't just pull over and collect their mail, according to that same report, is that engineers have spent decades deepening and widening its channels to keep large freighters moving safely.

Because the largest freighters cannot easily stop for anything less than a dock, the Westcott crew devised a technique that has changed little in more than a century. The tugboat comes on the side of the ship that is coming in, with both ships moving. A crew member drops a rope, a Westcott deckhand ties on a package, and the ship's crew hauls it up. The exchange typically takes only a few minutes. The operation runs 24 hours a day, seven days a week, from mid-April to December, a schedule that has earned it the nickname "the 7-Eleven of the Great Lakes."

More than letters

Sailors on Great Lakes freighters may be away from home for months, and for many, this boat is their only direct link to land. The bucket has carried more than letters over the years, per that same outlet's reporting. When ship workers began placing orders, the crews got coffee, cigarettes, toothpaste, televisions, toilet paper, and even pizza. During Ramadan, Arab American steelship workers have had relatives send home-cooked meals out to the boats. One memorable delivery was a goat, taken to a petting farm, as recounted in the same story.

But with the changes in shipping and communication, the company has had to change too. In the 1950s, the boat handled some one million pieces of mail each season. That number had dropped to less than half by the mid-2010s, that reporting found, as radio, phones, and email took over the job letters once did. The 2008 financial crisis piled on more pressure, slamming the steel and auto industries that keep Great Lakes freighters running. The company survived by adding services. It also now delivers groceries to ships and helps guide foreign vessels through the waterway, work that keeps the business relevant as its original purpose shrinks.

A small boat with a long memory

It's not just the logistics that make this story work. It is the idea that, in the era of instant messages, a rope-bound bucket remains a link to loved ones. Through busy summer shipping seasons and the harsh, ice-shortened Great Lakes winters that bookend them, the Westcott crew has kept a 150-year-old promise alive, one delivery at a time. Someone will make sure the mail gets through, no matter how large the ship or how busy the river.