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<br />3.4.4 Cost Estimate for Stand-alone 800 MHz Radio System <br /> <br />An accurate cost estimate can only be prepared if a detailed system design is completed, <br />however, it is possible to construct a budgetary cost estimate based on actual pricing for a <br />somewhat similar system that was accepted for use in 1999. That system is a stand-alone, analog <br />modulation, 800 MHz trunked radio system installed in Chester County, P A. That system <br />consists of 15 total sites with eight sites in a single simulcast group with 11 channels, two <br />additional simulcast groups of two sites and four channels each and three single sites with four <br />channels each. There are 1200 radios, two redundant network controllers and a 16 hop, two-loop <br />DS3 microwave network with loop protection. The cost of the radio system was $8,220,000 and <br />the microwave system was $2,210,000. Following is a cost estimate for a similar system <br />installed in Anoka County with nine sites in a single simulcast group of 11 channels. <br /> <br />$ 8.22 Chester County radio system <br />2.21 Chester County microwave system <br />+0.58 Civil work <br />- 3.00 Nine site system reduce by six sites @ $500,000 each <br />- 0.45 Two less simulcast groups of two sites each <br />+0.24 200 additional radios @$1200 each <br />+0.83 10% allowance for differing circumstances, and inflation <br />+0.42 Sales tax on equipment <br />+ 0 .15 Radio Engineering <br />$ 9.22 million TOTAL <br /> <br />3.5 COMMUNICATIONS LINKS TO FIXED LOCATION RADIO SITES <br /> <br />Communications links are required to connect the dispatch center location to fixed location radio <br />sites located throughout Anoka County. Alternative ways for providing these required <br />communications links include a County owned microwave point-to-point radio system, County <br />owned glass fiber connections, or leased communications facilities from Qwest <br />Communications, Inc. <br /> <br />Microwave has proven to be a very reliable and quality way to provide point-to-point <br />r:ommunications links. Outages of microwave paths can and do happen due to short-term <br />atmospheric conditions, especially heavy rain, and damage to or failure of equipment. <br />Nevertheless, outages are rare. <br /> <br />Glass fiber links do not suffer outages due to atmospheric or weather conditions, however, glass <br />fiber links tend to be slightly less reliable than microwave links due to cuts in either overhead or <br />underground cables. Outages of glass fiber communications links, like microwave links, are <br />rare. <br /> <br />Ronald Vegemast Engineering, Inc. <br /> <br />-30- <br /> <br />Report: Anoka County <br />