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Federal Energy Regulatory Commission

Industries Hydropower Dam Safety and Inspections RIDM - Regulations, Guidelines and Manuals

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Engineering Guidelines for the Evaluation of Hydropower Projects

Chapter 14 Evaluation of Hydropower Projects

Original Issuance: Chapter 14, Appendix L, Detailed Radial Gate Inspection Reports

The FERC Division of Dam Safety and Inspections implemented the Tainter Gate Initiative in 1998, following the failure of a radial spillway gate at Folsom Dam. Since the 2001 revision to the initiative, each dam with a Category 1 radial gate has been required to submit a detailed Gate Inspection Report (GIR) at a ten-year interval. The GIRs submitted to-date have varied in quality, scope, and contents.

Therefore, Chapter 14, Appendix L provides guidance on our minimum expectations for the GIRs, including the required qualifications of the team, an outline for the report and appendices, and the minimum contents thereof. Appendix L also includes copies of previous letters issued by the FERC related to the Tainter Gate Initiative, for reference.

Any comments and suggestions on the guideline can be sent to David Capka at

» Appendix L PDF