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<br />4. TITLE AND SUBTITLE <br /> <br />5. REPORT DATE <br /> <br /> <br />00238'; <br /> <br />7-2090 (4-81) <br />Bureau of Reclamation <br /> <br />1. REPORT NO. <br /> <br /> <br />L REPORT STANDARD TITLE PAGE <br />3. RECIPIENT'S CATALOG NO. <br /> <br />SNOWPACK AUGMENTATION RESEARCH NEEDS <br /> <br />June 1, 1982 <br />6. PERFORMING ORGANIZATION CODE <br /> <br />A History of Weather Modification in Colorado <br /> <br />7. AUTHOR(S} <br />Barbara C. Welles <br /> <br />8. PERFORMING ORGANIZATION <br />REPORT NO. <br /> <br />9. PERFORMING ORGANIZATION NAME AND ADDRESS <br />Colorado Department of Natural Resources <br />Weather Modification Program <br />1313 Sherman Street, Room 718 <br />Denver, Colorado 80203 <br />12. SPONSORING AGENCY NAME AND ADDRESS <br />Bureau of Reclamation <br />Division of Atmospheric Resources Research <br />PO Box 25007 <br />Denver, Colorado 80225 <br /> <br />10. WORK UNIT NO. <br /> <br />11. CONTRACT OR GRANT NO. <br />9-07-85-V0027 <br /> <br />13. TYPE OF REPORT AND PERIOO <br />COVERED <br /> <br />Final Report <br />May 1979 - June 1982 <br /> <br />14. SPONSORING AGENCY CODE <br />DIBR <br /> <br />IS. SUPPLEMENTARY NOTES <br /> <br />16. ABSTRACT <br /> <br />Weather modification activity in Colorado is regulated by state statute <br />(Title 36, Article 20, C.R,S, 1973) and administered by the state Depart- <br />ment of Natural Resources. The main focus of weather modification <br />activity in the state is the augmentation of winter snowpack. Federal <br />research programs have included hail suppression, snowpack augmentation, <br />and the transport and diffusion of seeding materials. Commercial projects <br />to affect precipitation have been conducted to suppress hail, to increase <br />rain, and to augment winter snowpack - with the last being the predominant <br />commercial activity in recent years. <br /> <br />This document includes identification of needed research projects of <br />particular importance to the state, a history of Colorado weather <br />modification legislation and brief descriptions of projects conducted <br />after 1972 from the files of the Department of Natural Resources, <br /> <br />17. KEY WORDS AND DOCUMENT ANALYSIS <br />a. ESCRIPTORS-- / weather modification/ winter orographic cloud seeding/ in- <br />iuced precipitation/ snowpack augmentation/ environmental effects/ envir- <br />onmental education/ community impacts/ public invo1vement/ water manage- <br />ment (applied), project design and eva1uation/ decision making/ policy de <br />velopment/ 1icenses/ permits/ social impacts/ political impacts/ <br /> <br />b. /DENTIFIERS-- / Colorado River Basin/ State of Co1orado/ <br /> <br />c. COSATI Field/Group <br /> <br />04(B <br /> <br />COWRR: <br /> <br />0402.1 <br /> <br />SRIM: <br /> <br />18. DISTRIBUTION STATEMENT <br />Available from the National Technical Information Service, Operations <br />Division, 5285 Pon Royal Rood. Springfield. Virginia 22161, <br /> <br />19. SECUAtTYCLASS 21. NO. OF PAGE <br />(THIS REPORT) <br />UNCLASSIFIED <br />20. SECURITY CLASS 22. PRICE <br />(THIS PAGE) <br />UNCLASSIFIED <br />