The chief administrator of the Denver regional office of the government's savings-and-loan bailout agency has been replaced, and the office has been stripped of authority in six states as part of a shakeup in the organization.

The agency also shuffled management and responsibilities in Atlanta, Dallas and Kansas City, Mo.Sherwin R. Koopmans, a 27-year veteran of the Federal Deposit Insurance Corp., has been named director of the Resolution Trust Corp. Western Region, replacing Anthony Scalzi, who is transferring to Washington as acting director of the Resolutions and Operations Division.

Officials in Washington would not give a reason for Scalzi's replacement.

The region encompasses Arizona, California, Colorado, Hawaii, Nevada, New Mexico and Utah.

The Denver office was formerly in charge of 13 Western states. It has been criticized for moving too slowly.

The states removed from Denver office authority include Alaska, Washington, Oregon, Idaho, Montana and Wyoming. Authority for those states was transferred to the Kansas City office.

Koopmans had been deputy director in the Resolutions and Operations Division. Prior to that, he had been with the FDIC Division of Bank Supervision.

The RTC was created to manage and dispose of failed thrifts and their holdings.

L. William Seidman, chairman of the agency, said the moves were made "to improve operations" and "position the RTC to take on a growing workload."

The agency has been sharply criticized for mistakes, slow activity and higher-than-expected costs in bailing out thrifts. Administrators also have been criticized for selling real estate seized from failed savings and loans.