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<br />Colorado Water Conservation Board <br />Department of Natural Resources <br />721 State Centenni.al Building <br />1313 Sherman Street <br />DeDver. Colorado 80203 <br />PhODe (303) 866-3441 <br />FAX (303)866-4414 <br /> <br />STATE OF COLORADO <br /> <br />. <br /> <br />Roy Romu <br />Governor <br /> <br />JamesS. Locl1bead <br />E=arive Direa.or, DNR <br />DaricsC.U1e,P.E. <br />Direaor, cwes <br /> <br />MEMORANDUM <br /> <br />FROM: <br /> <br />Colorado Water Conservation Board Members <br /> <br />William P. Stanton, P.E. v.l~' <br />Chief. Project Planning and 'Construction Section <br /> <br />TO: <br /> <br />DATE: <br /> <br />January 12, 1996 <br /> <br />SUBJECT: <br /> <br />Agenda Item iSd, january 24.25, 1996 Board Meeting M <br />1996 Legislative Issues in tbe Colorado General Assembly, <br />Weather Modification Program <br /> <br />Introduction <br /> <br />The licensing and permitting of weather modification operations pursuant to section 36-20, CRS. <br />is scheduled to terminate on July I, 1996 unless continued by the General Assembly. A bill for <br />an act to. continue the issuance of permits for weather modification operations by the Executive <br />Director of the Department of Natural Resources and eliminating the licensing of weather <br />modification operators has been introduced by the Joint Legislative Sunrise and Sunset Review <br />Committee. This bill is of interest to the Board because the program is administered by the <br />CWCB staff. <br /> <br />Backe.round <br /> <br />The natural process of precipitation, as rain or snow, occurs by the formation of clouds as the <br />result of water vapor condensing around microscopic particles in the atmosphere. These particles, <br />called condensation nuclei, come from many sour~es including dust, salt, and smoke. Weather <br />modification operations try to add additional nuclei, as dry ice or silver iodide, into the clouds <br />in an effort to create more precipitation. Precipitation occurs when these microscopic droplets <br />or ice crystals combine together to become heavy enough to fall to earth in the form of rain or <br />snow. <br />