Kenneth H. Rock, Utah Hospital Association president and chief executive officer, has announced he will retire Jan. 6, 1991. He will serve as a consultant to the association.

Richard B. Kinnersley, executive vice president, will succeed Rock as association president.Kinnersley is a former University of Utah Hospital marketing specialist and Public Employees Association executive. He previously served as UHA president.

Rock has been with UHA since October 1989 when he stepped down as president of Holy Cross Hospital, having served that facility for 20 years as an administrator.

During the recent UHA House of Delegates meeting, Gary W. Farnes, chief executive officer of Intermountain Health Care's Salt Lake Valley hospitals, was elected chairman of the board of trustees for the association.

Farnes has served as CEO of Alta View, Cottonwood and LDS Hospitals since June 1989. Prior to that, he was administrator of LDS Hospital for four years, and of Cottonwood Hospital for three years.