Last Thursday, Rex Smith, executive editor of the Albany Times Union, got a phone call. On the other end was Steve Engelberg, the managing editor of ProPublica, the new independent investigative journalism non-profit.

Engelberg, who left his perch as managing editor of The Oregonian around the first of the year, was on the other side of the country, standing in his old yard alongside a loading moving truck. And he was making an offer Smith felt he couldn’t refuse.

ProPublica, in conjunction with WNYC, New York City’s major public radio station, had conducted a month-long investigation into the lax regulatory framework behind a booming natural gas drilling industry in rural New York. The extraction process uses chemicals that raise serious health and environmental concerns both for upstate residents and for the city’s drinking water. Would Smith be interested in running the story?

“It’s almost an editor’s dream,” says Smith. “Here’s a great story on a matter of public interest that no one’s heard of, and it’s thoroughly edited. And it’s yours. Free.”

There was just one catch. ProPublica wanted to run the piece early in the week—Monday, July 21, probably—and this was the first time Smith had been in touch with ProPublica in any way, let alone told of this particular investigation. The paper asked for more time.

But the clock was ticking. A bill clearing the way for expanded drilling sat on the governor’s desk, awaiting his signature within the week. ProPublica’s Abrahm Lustgarten and Ilya Marritz of WNYC had been working together since late June, and had discovered that briefings given by regulators to legislators before the bill’s passage contained at-best-incomplete information. When they questioned New York’s Department of Environmental Conservation about steps the state was taking to monitor and mitigate the drilling’s impact, the answers implied that regulators were ill-informed and far from ready for such an undertaking.

It was a good—and so far uncovered story—and while the Times Union wasn’t brought in until the eleventh hour, the collaboration between WNYC and ProPublica originated in April, when the station’s political director and de facto investigations editor, Andrea Bernstein, emailed Engelberg to say that they were “very, very interested” in pairing. After an initial meeting, they promised to stay in touch.

“Our basic motive is to try to make an impact,” says Engelberg. One part of that model—to get ProPublica’s work a wide audience—is to partner, cost free, with traditional outlets in both investigations and in the publication and dissemination of the work. (ProPublica’s first big investigation—into the operations of Al-Hurra, the U.S.-backed Arabic news channel—found a home on 60 Minutes.)

When Lustgarten proposed a version of the gas story to Engelberg after starting at ProPublica, the editor saw an opportunity to work with WNYC. Although Marritz had already done a basic piece on upstate gas exploration, he felt there were many environmental questions that had yet to be answered. He was excited to be assigned to work with Lustgarten.

After a few phone calls, the pair met for lunch, and, on July 7, headed up to Albany to conduct a round of interviews. There were few points of friction between the two.

“I had done a couple of weeks work and I had great solid leads and sources and I wasn’t enthusiastic about sharing it all,” says Lustgarten, who was working on his first ProPublica story. “I kept being reminded by my editors that the mission was to get the story out, not necessarily for me to get the best clip.”

Radio reporter Marritz had a different concern: “I was certainly worried that Abrahm would have a great conversation and I wouldn’t be there to record it.”

That technical issue forced them to work very closely together—conducting many interviews side by side, planning their days together, and, until they reached the writing and production phase, often speaking several times a day. In the end, ProPublica and WNYC fact-checked each other’s pieces.

“Once we got going, it was like we were two reporters from the same organization,” says Lustgarten, who, like everyone else involved, regards the project, the collaboration, and the results as a whopping success.

Clint Hendler is the managing editor of Mother Jones, and a former deputy editor of CJR.