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~, "'. I I I I I I I I I I I I I- II I I I I I I Mr. Joe Busto, CWCB Flood Protection and Weather Modification Permitting Section, served as the Project Manager for the Colorado WDMP research project. He was the point of contact between the CWCB and Reclamation, and procured the services of Mr. Ross Williams for GIS support, HEI . oversaw the administration of the grant funds at the CWCB, and the related Interagency Agreement with CSU, He also participated in research project coordination and meetings with Reclamation, CSU, and OW. Mr, Curt Hartzell, CCM, assisted Joe Busto in the program management, closely overseeing activities to ensure that the program objectives were bHing achieved. He coordinated project activities between the CWCB, the CSU research team, the OW Operational Cloud Seeding Program (Mr. Steve Schmitzer), and the OW program's cloud seeding contractor, Western Weather Consultants, LLC (Mr, Larry Hjermstad), Dr, Bill Cotton was the Principal Investigator (PI) for the CSU research team (Mr, Ray McAnelly, Dr, Gustavo Carri6, Dr. Paul Mielke). Administrative assistant Ms. Brenda Thompson monitored all CSU work task expenditures, prepared and submitted invoices to the CWCB, and helped in the preparation of project reports, 1.3 Current Status of Winter Orographic Cloud Seeding There is ample evidence that seeding cold orographic clouds contai ning supercooled liquid water with a chemical agent such as silver iodide can form ice crystals that may fall as snow, Water managers can be at least cautiously optimistic that a viable technology is emerging for seeding winter orographic clouds for snowfall increase - if the seeding program is properly designed and conducted, The most recent policy statement on weather modification by the American Meteorological Society (1998) states that, "There is statistical evidence that precipitation from supercooled orographic clouds (clouds that develop over mountains) has been seasonally increased by about 10%, The physical cause- and-effect relationships, however, have not been fully documented, Nevertheless, the potential for such increases is supported by field measurements and numerical model simulations," The recently updated (2005) Weather Modification Association (WMA) Capability Statement on Weather Modification includes the following: "The capability to increase precipitation from wintertime orographic cloud systems has been demonstrated successfully in research experiments", Technological advances have aided winter precipitation augmentation programs, Fast-acting silver iodide ice nuclei, with higher activity at warmer temperatures, have increased the capability to augment precipitation in shallow orographic cloud systems, Numerical modeling has improved the understanding of atmospheric