WASHINGTON -- Joe Egan, the lead attorney for Nevada in its fight against the Yucca Mountain nuclear waste repository, died Wednesday morning at his home in Naples, Fla., a law partner said.

Egan, 53, battled stomach cancer for more than two years. As his condition worsened in recent weeks, the firm he founded in 1994 reorganized to continue its Nevada representation.

"I was saddened to learn the news of Joe's death," Sen. Harry Reid, D-Nev., said in a statement. "He worked hard to help protect Nevada by stopping the construction of the dump at Yucca Mountain. His work on behalf of our state will not be forgotten. I extend my sympathy to his family."

Bob Loux, executive director of the Nevada Agency for Nuclear Projects, said Egan "was a fabulous lawyer and a talented guy, and he will be missed."

Egan's firm, then called Egan and Associates, was hired by the state in 2001. Between then and 2005 it initiated nine lawsuits against the federal government, seeking to halt plans to bury high-level nuclear waste at the Yucca site.

A victory in a 2004 suit invalidated a key radiation safety standard for the repository. A new standard still has not been finalized, contributing to delays in the Yucca program.

More recently the firm, now known as Egan, Fitzpatrick & Malsch, has been engaged in administrative debates before the Nuclear Regulatory Commission while preparing for repository license hearings at the agency.

During his illness, Egan over time reduced his public role as the state's advocate in favor of his two legal partners, Martin Malsch and Charles Fitzpatrick. Egan maintained a presence behind the scenes.

Fitzpatrick, who disclosed Egan's passing, said a memorial service was being planned for May 22 in Naples. Other details were not immediately available. He leaves a wife, Patty, and two children.

Besides being an attorney, Egan was a former station-certified nuclear reactor engineer with degrees in physics, nuclear engineering and technology and policy from the Massachusetts Institute of Technology. He earned his law degree at Columbia University.

Before founding his firm, Egan was a partner at Shaw Pittman in Washington, D.C., and a senior associate at LeBoeuf Lamb Greene & MacRae in New York City. Both firms specialized in nuclear and public utility law and litigation.