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Winter Operational Weather Modification Programs in Utah, 1974 - Present. Sponsored by Various Counties in Utah. NA WC was involved in establishing a winter weather modification program in Utah during the 1973-74 winter season. This program has continued to operate each winter season since 1974 with the exception of the very wet winter seasons of 1984-1986. A large network of ground based cloud seeding generators are utilized to seed naturally occurring winter storms with the goal of augmenting the snowpack accumulation in mountainous areas of the State of Utah. In recent years a large percentage ofthe mountainous areas of Utah have been included in this program. NA WC project meteorologists conduct this program from NA WC's corporate headquarters in Salt Lake City. A number of field technicians and local residents are also involved in the program. Mr. Griffith has provided the overall project supervision and marketing ofthis program since 1977. Participants include: Beaver, Box Elder, Cache, Carbon, Duchesne, Emery, Garfield, Iron, Juab, Millard, Piute, Sanpete, Sevier, Tooele, and Washington Counties, Utah Water Resources Development Corporation. Provo River Water Users Association, Weber Basin Water Conservancy District Duchesne County Water Conservancy District, Uintah Water Conservancy District, Salt Lake City Public Works, Cache County and Box Elder County. Winter Operation Weather Modification Program for Boise Board of Control, Idaho, 1992- 1996,2001-present. NA WC was contacted by the Boise Board of Control in the fall of 1992. This Board represents five different irrigation districts. The Board contracted with NA WC to conduct a winter snowpack augmentation cloud seeding program. This program continued each winter season through 1996 when it was terminated due to adequate water supplies then operations resumed in the 2001-02 winter season. The goal of the program has been to augment higher elevation winter snowpack in portions ofthe Boise River Basin resulting in additional reservoir storage that can be utilized for agricultural irrigation. The program utilizes a network of ground based silver iodide cloud seeding generators. Mr. Griffith has served as the manager of these programs. NA WC was contacted by a representative of Gunnison County in August, 2002 about the possibility of designing and conducting a winter cloud seeding program. NA WC was awarded a contract through competitive bid to perform a feasibility/design study. This design was implemented for the spring of 2003 and utilized ground based, manually operated silver iodide generators. The goal of the program was to augment the higher elevation snowpack in Gunnison County. The programs target area was expanded for the 2003-2004 winter season to include watersheds in adjacent counties that contribute streamflow to the Gunnison River above Blue Mesa Reservoir. The program was continued for the 2004-2005 winter season. Mr. Griffith has served as the manager of these programs. Winter Operation Weather Modification Program for Gunnison County, Colorado, 2002 _ present. Participants include: