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Weather Modification Permit (WM2) Applicant: Villano Bros. Farms, Inc. Date: March 4, 1998 OPERATIONAL PLAN 1. Description of the obiectives of the proposed proiect. Commercial op~ation of a hail suppression device using ~eql!enced sound waves to produce a cavitation effect in ice forming within cumulus cloud formations in order to inhibit the _ _ _ J9~tion ofj~~ p~.clescausjn~_ th~ .1lloistur~ .19 fall as rl!liJ. _r~the! than_ h~ !Yit]1iIl the tilfg~t _ area. 2. Description of the target area and the area reasonably expected to be effected by the project. The target area includes the parcels listed on Exhibit A located in the south central part of Weld County, Colorado. Please see attached map(s) of target area(s). 3. Description of ho\v the proiect vlill be ca..rried out (inc1udini location of office and "veather data used). The project will be carried out by the installation and operation of a hail cannon located within the above-described target area( s). The target area will cover a circle (with the hail cannon at the center) with a radius of 500 meters. Due to distortions resulting from prevailing winds, the target area may become enlarged to the extent that the areas reasonably expected to be affected by the project are those areas witllln a 1,000 meter (3,280 feet) radius ofthe hail cannon. [The distortions will be dependent upon the velocity of the prevailing winds. Generally, prevailing wind currents crossing the continental divide will be from the west or the northwest and would present a target area elongated to the downwind side south (south/east) and shortened on the upwind side of the 500 meter target radius]. The hail cannon is designed to direct sound waves upward to penetrate the ice particle- producing area of the clouds in order to inhibit the formation of hail stones. The hail cannon is a cylinder-shaped upright chamber, in which acetylene is ignited, discharging energy (in the form of sound waves) upward/perpendicular to the ground. Discharges from the hail cannon are controlled by a computer which sequences the time interval between sound discharges. The decision to commence operation of the hail cannon will be determined by visual observation of the operator/applicant. Under ideal conditions, the operation of the hail cannon will commence ten (10) minutes before the expected arrival of the hail-producing cloud over the target area and will continue operation until the hail-producing cloud(s) has fully passed over the target area. The decision to commence operation of the hail cannon will be made by the operator/applicant and will be based upon the operator/applicant's visual observations and