HCA Virginia has sued the Loudoun County Board of Supervisors for denying its application to build a 164-bed hospital, saying that the board's vote was "arbitrary, unreasonable, capricious and illegal" because the state health commissioner had approved the hospital's location. The lawsuit extends a long fight over a project that HCA proposed in 2002, and it marks the second time the company has sued the county board over its rejection of the plans.