We are soliciting comments and input on these new RIDM Risk Guidelines. Please provide your comments by using our on-line Comment Form
- About Risk-Informed Decision Making (RIDM)
- RIDM Workshops and Training
- RIDM Risk Guidelines
- Other New RIDM Documents
- Draft Technical RIDM Risk Methodology Guidelines
- RIDM Pilot Projects
About Risk-Informed Decision Making (RIDM)
Risk-Informed Decision-Making (RIDM) is a method of dam safety evaluation that uses the likelihood of loading, dam fragility, and consequences of failure to estimate risk. This risk estimate is used along with standards-based analyses to decide if dam safety investments are justified or warranted. This approach has many benefits including a greatly improved understanding of the safety of the dam and identifying dam safety vulnerabilities that have not been identified using standards-based evaluation techniques.
The Commission’s 2014-2018 Strategic Plan Objective 2.2 is to minimize risk to the public and Strategy 1 of this objective is to use risk-informed decision making to evaluate dam safety. These efforts are to complement the traditional dam safety approach and together will improve public safety.
RIDM Workshops and Training
Future RIDM workshops and training are being planned. We are planning a 90-minute web-based training to provide to licensees and consultants an overview of the new RIDM Risk Guidelines.
Additional RIDM workshops and training include:
- Risk Overview
- Level 2 Risk Analyses
- Additional Technical Workshops
Please check back to this website for updates to upcoming risk training | Past Workshops and Training
RIDM Risk Guidelines
- New Draft RIDM Policy Guidance Documents
Other New RIDM Documents
Comment Disposition Summary Table - A table that presents the external reviewers of the initial draft of the RIDM policy documents. The table includes the review comment, disposition, and comment resolution.
Draft Technical RIDM Risk Methodology Guidelines
In general, FERC will follow the risk methodologies developed jointly between the Bureau of Reclamation and the U.S. Army Corps of Engineers and documented in Best Practices in Dam and Levee Safety Risk Analyses.
Additional guidance can be found in the following FERC RIDM documents.
- Chapter R5 – Concrete Dams
- Chapter R10 – Internal Erosion
- Chapter R19 – Probabilistic Flood Hazard Analysis
- Chapter R20 – Probabilistic Seismic Hazard Analysis
- Chapter R21 – Dam Breach
- Chapter R22 – Estimation of Life Safety Consequences
Note: that the existing standards-based (deterministic) FERC Engineering Guidelines will remain in place for the foreseeable future.
RIDM Pilot Projects
Pilot projects to trial the new RIDM Risk Guidelines are now underway and additional projects are being solicited. The following link provides more information about proposals to conduct risk pilot studies.