This report describes the adoption and implementation of FERC Order 2003 and the reasons for the sharp rise in generation interconnection filings in recent years. After an introduction, Section II explains the basics of large-scale generator interconnection. Section III summarizes the number of generator interconnection filings at BPA, WAPA, and the RTOs and ISOs across the country. Section IV documents the reasons for these sharp increases in generator interconnection filings. Section V explains the interconnection queue reform initiatives that have been approved, proposed, or are under consideration. A review of potential solutions to the problem of clogged generator interconnection queues is provided in Section VI. The report closes with a summary in Section VII.