Lee T. Keyes, Loudoun County's longtime commissioner of revenue, said yesterday he will retire June 30 because of his age, poor health and a pending drunken driving charge.

"I have some health problems," said the 66-year-old Keyes, who has held the elected position for 13 1/2 years. "I have entertained the idea of retiring for the past six months, but this [the charge] just sort of put me over the top."

Keyes, a Democrat, suffered facial cuts and rib injuries in a March 30 head-on collision with another automobile a half block from his home in Leesburg.

He was subsequently charged by town police with driving under the influence, he said.

Keyes, who was wearing a seat belt, was knocked unconscious and hospitalized for five days, he said.

The two passengers in the other car suffered minor injuries, according to William Burch, the Loudoun prosecutor.

Keyes declined to say how he will plead to the charge, but he said publicity about the accident could affect the public's perception of his work.

"I don't want anyone to think I'm trying to escape," he said. "I'm just doing what I think is proper."

Keyes, who has worked in various capacities for Loudoun County for 22 1/2 years, said the accident was his first in 52 years of driving.