On a sunny day at Seattle’s Gasworks Park, you can see dozens of people flying kites, families having picnics, and children running around strange iron towers painted in bright colors. The towers look like props from a science-fiction movie about robots. But few visitors know that a real—and unpleasant—secret lies deep beneath their feet. This was once one of the dirtiest and most dangerous industrial sites in the city.
The Plant That Made Gas from Coal
More than a century ago, in 1906, a plant was built on this very site. Its job was to turn coal into gas—the same gas used to light Seattle’s streets and homes before electricity became widespread. The process was filthy: coal was heated in enormous furnaces, releasing tar, soot, and other substances into the air and soil that modern science would classify as toxic waste.
The plant operated for nearly fifty years. By 1956, when it finally closed, the surrounding land had become a genuine “sick zone.” Scientists later discovered that the soil was saturated with dangerous chemicals several meters deep. It was unsafe to walk there, let alone grow anything.
How the Land Was “Covered with a Blanket”
Seattle officials bought the contaminated land on the shore of Lake Union in 1962, dreaming of turning it into a park. But a problem soon arose: how could they create a beautiful public space where the soil itself was poisonous?
Landscape architect Richard Haag took on the challenge. His idea was unusual for the 1970s. Instead of removing all the contaminated soil—which would have been extremely expensive and taken years—he proposed covering it with a thick layer of clean soil, nearly a meter deep. It was like covering a dirty floor with a carpet: the dirt remained underneath, but the surface became clean and safe.
As for the plant’s old rusty machinery—the towers, pipes, and enormous metal structures—Haag did what many considered madness. He did not demolish them. He left them standing, painted them, and made them part of the park, almost like giant sculptures. He even converted one structure into a picnic shelter and another into a play area where children could climb among the old machines that had once produced gas.
Haag himself said he wanted people to remember the site’s history rather than erase it:
“We should not hide the past. We should learn to live with it and turn it into something beautiful.”
Gasworks Park officially opened in 1975 and quickly became one of Seattle’s most recognizable landmarks.
Why It Matters Today—and Beyond Seattle
What Richard Haag created became an example for the entire world. The idea of “not hiding, but transforming”—keeping traces of old industry visible while making the surrounding space clean and safe—is now used in dozens of cities.
For example, New York’s famous High Line was built on an old railway that was not dismantled but transformed into an elevated green walkway. In Germany, Landschaftspark was created on the site of a former steel plant, where old furnaces are now used for rock climbing. In China and elsewhere, engineers and architects still study Seattle’s experience when planning new parks on former industrial sites.
| Park | City | What It Was Before |
|---|---|---|
| Gasworks Park | Seattle, USA | Gas plant |
| High Line | New York, USA | Abandoned railway |
| Landschaftspark | Duisburg, Germany | Steel plant |
Scientists who study such transformations call the process “remediation”—the healing of contaminated land. It is not just about parks. It is about how people are learning to care for the planet instead of simply abandoning damaged places and walking away.
The Lesson Hidden in the Grassy Hill
When I think about Gasworks Park, it seems to me that it holds a lesson not only about land and factories, but about life in general. Sometimes something can seem completely ruined and hopeless—but with patience, creativity, and care, even the dirtiest place can become a beloved park where hundreds of people come to fly kites.
Today, as children run across the hill at Gasworks Park, flying kites above Lake Union, few of them think about the history of contaminated soil and its remarkable healing beneath their feet. But perhaps that is exactly what makes this place so special: it reminds us that even a past full of mistakes can be transformed into something to be proud of.
