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14 I 1 I I I I I I I I I I I I I I I I I seeding opportunities, but the observed precipitation for this period was slightly below the long-term average. The first half of March 2004 only had two short cloud-seeding opportunities; the last cloud-seeding activity ended on March 15, 2004. Warmer than normal temperatures during March resulted in a decre!ase in snowpack snow water equivalent (SWE) and some snowmelt runoff at elevations below about 9,500-10,000 ft. MSL. The precipitation trends described above for the first half of Water Year 2004 (October 2003 through March 2004) are evident in Figures 2.3 and 2.4. These figures show the precipitation and SWE trends for the Natural Resources Conservation Service (NRCS) SNOTEL sites at Summit Ranch (9,400 ft) alnd Fremont Pass (11,400 ft), respectively. Summit Ranch is located on the headwaters of the Blue River basin on the north side of the DW Program target area. Fremont Pass is located just outside of the west boundary of the tar!~et area. Overall, for the November 2003 through February 2004 period, the observed precipitation at the Summit Ranch and Fremont Pass SNOTEL sites were 98.9% and 87.3% of average, respectively. The CWCB and DW determined that it was necessary to re-identify the generator sites not only for the research project, but also for clarity with past and future operational cloud seeding programs. Greg Bryant (Denver Water GIS Coordinator) and Joe Busto (CWCB) worked with Larry Hjermstad (WWC) to re- identify ice nuclei generator sites from initials of the generator operators to a letter-numbering system. The new site identification (ID) consists of a lette!r representing the project followed by a number (see Appendix 1). The result was an Excel spreadsheet that contains the site ID, location, elevation, status, and other information for all generator sites. This became the official identification system for DW and CWCB; the new seeding generator site ID scheme was built into the Colorado WDMP research project's GIS and graphics. During the January 14, 2004 project conference call there was discussion about using the Generator Site Excel Spreadsheet for WWC seeding reports (e.g. dates, times, total hours, seeding rates, and primary target areas by site). Larry Hjermstad (WWC) suggested using one spreadsheet page per cloud- seeding opportunity event to reduce confusion. This was done and WWC went back to the start of the DW Program in November 2003 and put all c1oud-sI3eding event reports into the same format. These event seeding report spreadshHets were combined into summary spreadsheets at the end of the DW 2003-2004 operational program.