THE NEW DISTRICT OF COLUMBIA DETENTION CENTER WAS CONSTRUCTED ON SCHEDULE AT AN ESTIMATED COST OF $30,500,000. HOWEVER, ITS 960 CELLS ARE INSUFFICIENT TO HOUSE THE DISTRICT'S DETENTION POPULATION. DETENTION POPULATION GROWTH HAS EXCEEDED PROJECTIONS AND THEREBY PRECLUDES THE CLOSURE OF THE OLDER DISTRICT JAIL AND WOMEN'S DETENTION CENTER. AT A COST OF APPROXIMATELY $12,000,000, THE DISTRICT PLANS TO ADD 480 CELLS, WHICH MAY NOT BE ADEQUATE. THE REPORT RECOMMENDS THAT THE DISTRICT USE THE FOLLOWING FACTORS TO DETERMINE SPACE REQUIREMENTS IN PLANNING FOR THE ADDITION TO THE DETENTION CENTER: PROJECTIONS OF PEAK RATHER THEN AVERAGE DAILY DETENTION POPULATIONS AND PROVISION OF SPACE FOR DIAGNOSTIC AND CLASSIFICATION SERVICES. (AUTHOR ABSTRACT MODIFIED).