In a tight, three-way race for the Dulles District seat on the Loudoun County Board of Supervisors, one candidate is putting his money where the other two candidates' mouths are.

As Democratic incumbent Ann B. Kavanagh and Republican challenger Benjamin H. Hicks Jr. trade loud verbal blows, independent candidate Clements T. Berezoski, who says little about either, is outspending each of them by more than 2 to 1.

Kavanagh has accused Hicks of conducting a campaign of rhetoric; Hicks charges that Kavanagh "has sold out" her district's interests to preserve the county's rural western end. Meanwhile, Berezoski, while staying clear of the verbal fray, has poured $16,000 of his own money into his effort to win the Nov. 3 election.

Some political observers say the supervisor race in the Dulles District -- a 130-square-mile area that stretches from Leesburg in the northwest to the Fairfax County line in the southeast, including much of Dulles International Airport -- is proving as dynamic as the area itself, which is becoming the economic backbone of Loudoun County.

About 25 million square feet of commercial and office space is in the rezoning process or under construction in the district, and at least 13,000 residential units are being built or are on the drawing board, according to county planners. If all the projects are completed, an estimated 62,000 jobs will be created, they say.

The competition to represent this booming district on the county's eight-member Board of Supervisors is keen.

While Kavanagh, a 45-year-old teacher in Fairfax County, and Hicks, a 41-year-old program manager for MAR Inc., a defense contractor in Crystal City, have taken note of Berezoski's campaign war chest, most of their energy has been devoted to grappling with one another.

Hicks says Kavanagh "has abandoned her constituents and adopted the party line," embracing policies that have "sacrificed" the Dulles District to developers in an effort to spare western Loudoun.

In addition, Hicks charges that Kavanagh, a first-term supervisor, has adopted what he sees as the Democratic-majority board's big-spending ways.

In the past four years, the county's annual operating budget has risen from $63 million to $123 million, "and there is nothing to show for it" in the Dulles District except for more bureaucracy, Hicks charged.

Areas zoned for light industry are undeveloped because the county has "fallen on its face" in its marketing efforts, said Hicks, who has lived in Loudoun for six years. And traffic problems will worsen, he said, because the county has approved residential units without adequate roads.

"If {after four years in office} I can't fill a campaign brochure with accomplishments, then I would not run again," Hicks said in a slap at his Democratic opponent.

"Personally, I don't plan to give him the chance to be supervisor," said Kavanagh. " . . . He doesn't know what he is talking about. I'm going to call him on every shot, and he'd better be prepared for it."

When Hicks talks of dormant tracts of land zoned for industry and business, he ignores recent and proposed additions such as Xerox Corp.'s planned Lansdowne mixed-use development, said Kavanagh. And in response to her GOP opponent's charge that she has sold out the Dulles District to save rural, western Loudoun, Kavanagh said that development has occurred in her district because it has sewer and water capacity that other areas do not.

As to the charge that she has not represented her constituents, Kavanagh said Hicks has been able to name only one vote -- on density of development -- where she went against the wishes of a large number of her constituents.

Kavanagh bristled at Hicks' suggestion that she has not shown leadership, noting that she initiated having developers contribute to the fire and rescue squads affected by their projects.

And she said that "anyone who thinks my vote could be influenced by a contribution" from a developer -- as Hicks has charged -- "doesn't know my voting record and me as a person." Kavanagh said she has been vocal in asserting that development should not outpace public services and transportation and that she has pressed developers to offer more roads and services with their projects.

On transportation, Kavanagh says she has supported bringing mass transit to Loudoun, widening Rte. 28 and extending the Dulles Toll Road to Leesburg.

Kavanagh, a 20-year county resident, said increases in the county's operating budget the past four years reflect the county's economic growth and were necessitated in part by its increasing population, which required more services.

Although the county's budget has nearly doubled in four years, Kavanagh noted that in the same period its real estate tax rate had been reduced from $1.10 per $100 of assessed value to 88 cents. "That's the bottom line," she said.

Though they agree on little else, Kavanagh and Hicks have suggested that their mutual opponent, Berezoski, believes that his money will translate into a victory at the polls.

"I don't intend to buy the Board of Supervisors seat," said Kavanagh, who said she has had $7,500 in contributions and expects to spend $8,000 to $9,000 on her campaign.

Hicks said he has raised $5,500 and expects to spend $7,000, while Berezoski says he expects to spend approximately $22,000, about 80 percent of it coming from his own pocket.

Ann Tedesco, Berezoski's campaign manager, said her candidate needs a large bankroll to offset his lack of party affiliation and name recognition among voters.

Berezoski, president of Potomac Snow Removal Corp., which he runs out of his Ashburn home, has used his campaign money to publish weekly notices in the local newspaper and to mail out packets outlining his positions on issues such as transportation, which he said is paramount in this election.

"Widening of the highways is not the answer," said Berezoski, 47, who has suggested that the county study the feasibility of a monorail.

Berezoski, a resident of Loudoun for 16 years, also said he favors pressing developers to build additional roads for their projects, better informing residents of the potential effects of development on their communities, and increasing the salaries of the county's sheriff's deputies.

The chairmen of the local Republican and Democratic parties, Richard McCary and Fred Hetzel Sr., agree that Berezoski has made the Dulles race more interesting, especially because of the money he is spending on it, an amount that McCary called "obscene."

But Berezoski said that his largely self-generated campaign fund reflects just how much he wants a seat on the Board of Supervisors. Before deciding to run, he said, "I was going to buy a new car."