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<br />8, The: uperational plan i~ as tollows;: <br /> <br />a, The physical ~uipment to be employe,] is an Eggers Co. hail l:unnon, consisting <br />of a cylindricallype, pot bellied, acti vity chamber with an upward exit point <br />narrowed to concentrate un,] prolong the release of energy out of the activity <br />chamber and to ~mit that energy through a conical type harrel, IlU'ger at the lop <br />and smaller at the huttom, permitting the cscupc of the sound waves from the <br />activity ch;mJ.ber, and continuing in conical shape. The hail cannon is powered by <br />acety'lune gas; injcctcd into the activily chamber Md if,'uiled by spark plugs, <br />balancing the amount or acetylene in the activity chamber to the amount of ai.r <br />availahle so that the en~rgy is generated entirely !"ithin m~ ac.ti\lity cu.ambcr. and. _ <br />pemlitting the expulsion of this energy in a conical pallum upward into the cluuds <br />at an angle perpendicular to the sutfaec. Thtj cannon will operate on inltjrvals of 6 <br />seconds proJucing a succession of sounJ waves, sequcnccd into the su,pect <br />d.Juu, The cannon is actuateJ hy remote control and fitted with its own radio that <br />accepts its own tmique signal. The activity scqtWnt:~ will continue until it is <br />tem1inated, <br /> <br />b. The decision as Lo when to activate thc cannon is hy visual obsclvatioll by person <br />with long experience in Saguachc Cowlly observing and noting till: acLivities of <br />the types ol'c1ouds most Iikcly to produce hail stones. Upon observation of a <br />elLlUU detelTl1ined to be a hazard to a particular protected arca the ohserver makes <br />ajudgmental dccision to aClivate tbe cannon a minimLLIll of 10 minutes prior to <br />the arrival of the suspect Cl0\ld :md activates the cannon. lmmediatcly after the <br />cloud has palised over, the canllon is dcaclivated. <br /> <br />e. The nOlTl1al appearlUlce or hail clouds is in the afternoon hours on days with <br />considerable build up of cUrnulu.~ activity in tllC: Illotmtains to the west along tb~ <br />Continental Vividc and to the north of the pJ'Oteetcd area, The n0n11allllovelm:nl <br />of the suspect hail clouds in the SanLlIi~ Valley is in a west to cast Jireclion <br />while crossing the continental divide. Aftcr crossing the divide the cwnulus <br />activity may move erratically but generally to the ea.~t aud south. The activation of <br />thc Cannon is ajudgmCl1tal decision by the operator, timeu tor a minimum of15 <br />minutes prior the estltnate,] time that the suspect hall cloud may pass over a <br />protected field, It is estimaled that the hail c.annon will nOI he in opCl'atioll longer <br />than 90 minutes continuously, and that within lhat penod of time thc dallger will <br />have passed the protected field, <br /> <br />d. The beginning of the operational season will be mid June whCUllsually the fIrst <br />problem hail clouds form and continuing lorward aud reaching the peak al <br />approximalely the middle of September. It is noted that thcsc dates are generally <br />datcs, in as much a~ there has b~en noted hail activity inlhe San Luis Valley as <br />