IT IS ASSUMED THAT THE RECURRING COSTS WILL BE ALLOCATED TO THE DISPATCHING AGENCIES. THESE AGENCIES HAVE BEEN RECOMMENDED BY THE ST. LOUIS COUNTY ADVISORY COMMITTEE ON 911 AS THE PUBLIC SERVICE ANSWERING POINTS FOR THE PROPOSED SYSTEM. EACH AGENCY'S COSTS ARE BASED ON THE AREA THAT IT SERVES AND ON THE KIND OF DISPATCHING SERVICES THAT IT PROVIDES. THE COUNTY'S SHARE OF THE TOTAL CITY-COUNTY OPERATING COSTS IS DIVIDED INTO AGENCY-SPECIFIC AND SYSTEMWIDE COSTS. AGENCY-SPECIFIC COSTS ARE ALLOTTED TO EACH DISPATCHING AGENCY BASED ON THE NUMBER OF TRUNK LINES THAT IT WILL HAVE WHEN THE 911 SYSTEM BEGINS OPERATING. SYSTEMWIDE COSTS, DISTRIBUTED AMONG AGENCIES, ARE BASED ON THREE WEIGHTED CRITERIA, USED SEPARATELY AND IN COMBINATION. THESE DISTRIBUTION CRITERIA, REPRESENTING MEASURES OF BOTH ACTUAL AND POTENTIAL USAGE, ARE SERVICE CALLS, POPULATION, AND ASSESSED VALUATION. ANOTHER POSSIBLE CRITERION, THE NUMBER OF MAIN STATIONS, WAS NOT USED BECAUSE DATA WERE NOT AVAILABLE. TABLES PRESENT THE COMBINED TOTAL OF AGENCY-SPECIFIC AND SYSTEMWIDE COSTS ALLOCATED EACH AGENCY, USING THE VARIOUS DISTRIBUTION FACTORS IN ALTERNATIVE FORMULAS; AND EACH DISPATCHING AREA'S PERCENTAGE OF THE TOTAL RECURRING COSTS UNDER EACH FORMULA. FORMULAS ARE DETAILED IN THE APPENDIX. TABULAR DATA ARE GIVEN. (AUTHOR ABSTRACT MODIFIED--AOP).