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<br />I <br />I <br />I <br />I <br />I <br /> <br />. <br /> <br />The Central Controller interrogates the weather station to monitor the <br />evapotranspiration (En rate of the turf/landscape at each site and programs <br />the precise amount of irrigation water daily or at any desired frequency to <br />match the ET water requirements. <br /> <br />. <br /> <br />The System reacts to environmental conditions such as rain and wind, <br />automatically shutting down or changing irrigation requirements according <br />to these changed conditions. <br /> <br />. <br /> <br />The irrigation water applied is volumetrically measured to meet the water <br />needs at each site -- according to different times of application, different <br />water volumes, and in different areas of the irrigated complex. <br /> <br />. The multi-tasking feature of the System controls up to eight independent <br />irrigation functions simultaneously -- allowing operation of several types of <br />sprinkler heads, lights, and other auxiliary functions. <br /> <br />. The System operates on a IBM PC-compatible computer supplied by the City. <br /> <br />. The stand-alone feature of the radio-linked Field Controllers ensures <br />continuous irrigation control, even if the link to the Central Controller is <br />lost. <br /> <br />. Flow sensors provide around-the-clock monitoring of the irrigation lines at <br />each site. The System responds automatically to leaks and line breaks -- <br />detecting the location, shutting off water to the problem area, and <br />automatically paging City Staff standby personnel. <br /> <br />. The System automatically and upon specific request generates printed <br />reports of operations including the rate of water application to each zone at <br />each site, the total volume of water applied, environmental conditions, time <br />on/off, and all alarm conditions. The System compatible printer is supplied <br />by the City. <br /> <br />Location of System: <br /> <br />The Central Controller, base radio station, and computer will be installed in <br />the Irrigation Supervisor's office at Arvada/North Jeffco Parks building, <br />7800 West 62nd Avenue. The Weather Station will be located on City <br />_ _ _ __ _ _ __ _ _ ____n_proper1Y_ withilLthe__presently_lenc.ed.'W'ell SitE> ZQ.aL1i8.QQ F~tp~. The fi"L _ . <br />two radio-linked Field Controllers will be installed at the Arvada Center, <br />and the West 80th Avenue landscaped median. <br /> <br />Water Use and Savings <br /> <br />Arvada/North Jeffco irrigates 123 sites and 132 manually operated field controllers in <br />the . City of Arvada including parKS, greenbelts, street medians, and landscaped <br />facilities. To maximize water efficiency, the controller(s) at each site must be manually <br />set for irrigation on/off times for each zone, as well as for changing evapotranspiration <br />(ET) rates, and shut-off when sprinkler heads fail or water lines break. During the 22 <br />week irrigation season the 123 sites are (or should be) visited weekly to reset the <br />controllers to irrigate according to the weekly updated ET rate. This workload requires <br />24 employees (with each Park employee operating five sites each) for a seasonal <br />requirement of 2,640 manhours. At an average salary of $100 per day per employee, the <br />minimum labor costs amount to $33,000 per season to operate the present manual <br />irrigation system. This does not include the additional time required to daily inspect. <br />the 123 sites for proper operation, system leaks, line breaks, broken sprinkler heads, and <br /> <br />-2- <br />