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TABLE OF CONTENTS EXECUTIVE SUMMARY .................................................................................. ...................................................... 1 SECTION I - INTR OD U CTI 0 N ............................................................................................................................. 4 1.1 PROJECT BACKGROUND .......................................................................................................................... 4 1.2 PROJECT OBJECTIVE ................................................................................................................................ 5 1.3 PROJECT WORKGROUP ............................................................................................................................ 6 1.4 PROJECT METHODOLOGY ....................................................................................................................... 6 SECTION II - EXISTING PUBLIC SAFETY RADIO SYSTEMS IN ANOKA COUNTy.............................. 7 2.1 SYSTEMS AND RADIO CHANNELS ........................................................................................................ 7 2.1.1 Fire Service Radio Systems in Anoka County .......................................................................................7 2.1.2 Law Enforcement Radio Systems in Anoka County .............................................................................. 7 2.2 SURVEY QUESTIONNAIRE....................................................................... ................................................ 8 2.2.1 Construction of the Questionnaire Document ........................................................................................8 2.2.2 Results of the Analysis of Questionnaires....................................................................... .......................9 2.3 ANALYTICAL DETERMINATION OF RADIO COVERAGE................................................................ 10 2.4 RADIO CHANNEL CONGESTION...........................................................................................................15 2.5 BACK-UP RADIO FACILITIES ................................................................................................................ 17 2.6 COMMUNICATIONS FACILITIES BETWEEN DISPATCH CENTER AND THE RADIO SITES ...... 18 2.7 STATUS OF ANTENNAS AND TRANSMISSION LINES...................................................................... 18 2.8 BACK-UP POWER ................................................................................ ... .................................... .............. 18 2.9 INVENTORY AND AGE OF RADIO EQUIPMENT ................................................................................ 19 2.10 BACK-UP DISPATCHING ......................................................................................................................... 20 SECTION III - AL TERNA TIVE PUBLIC SAFETY RADIO SYSTEMS IN ANOKA COUNTy................. 21 3.1 ENHANCE EXISTING RADIO SySTEMS............................................................................................... 21 3.1.1 Congestion............................................................................................................................................ 22 3.1.2 Coverage Relief.................................................................................................................................... 24 3.1.3 System Reliability Concerns ................................................................................................................ 24 3.1.4 Interoperation Communications ........................................................................................................... 25 3.1.5 Other Needs........................................................................... .................... .......................... ............ . .... 25 3.2 TRUNKED 800 MHz RADIO SYSTEM ALTERNATIVES ..................................................................... 25 3.3 TETRA TECHNOLOGy......................................................... ........ ............. ... ... ......................................... 26 3.4 COST ESTIMATES FOR ALTERNATIVES ............................................................................................. 27 3.4.1 Cost Estimates for Items that are Independent of Radio System Alternative Selected ........................ 27 3.4.2 Cost Estimate for an Enhanced VHF Radio System............................................................................. 28 3.4.3 Cost Estimate for MnlDOT Digital Modulation 800 MHz Radio System ........................................... 29 3.4.4 Cost Estimate for Stand-alone 800 MHz Radio System....................................................................... 30 3.5 COMMUNICATIONS LINKS TO FIXED LOCATION RADIO SITES................................................... 30 SECTION IV - CONCLUSIONS AND RECOMMENDATIONS...................................................................... 33 4.1 GENERAL CONCLUSION .................................................................. ....... ...... ............................... ..... ..... 33 4.2 TETRA.. ........ ..... ............................... .................... ...................................................................... .... ............. 33 4.3 ENHANCEMENT VERSUS REPLACEMENT OF PUBLIC SAFETY LAND MOBILE RADIO SYSTEMS IN ANOKA COUNTY ............................................................................................. 34 4.3.1 Base Alternative Directions..................................................................................................................34 4.3.2 Evaluation of Base Alternative Directions ...........................................................................................34 4.3.3 Alternative System Direction Cost Issues ............................................................................................37 4.4 SCHEDULE AND CRITICAL DECISION POINTS ................................................................................. 38 4.4.1 Back-up Dispatching .................................................................................. ........ .................................. 38 4.4.2 Second 24 Hour Law Enforcement Dispatch Channel......................................................................... 39 4.4.3 Fire Service Alerting Through Radio Paging ....................................................................................... 39 4.4.4 Long-term Direction Implementation Schedule ...................................................................................39 AP PEND IXE S .............................................................................................................................. ............................. 42 Ronald Vegemast Engineering, Inc. -11- Report: Anoka County