From the Document: "Researchers at the US Army Engineer Research and Development Center (ERDC) sought to develop engineering procedures to estimate the current load-carrying capacity of ground anchorage, and other factors related to the deterioration and lifespan of dam anchors. Based on previous work developed during the FY2017 NIPP [National Infrastructure Protection Plan] Challenge by the team of researchers from Harvey Mudd College and Engineering Innovations, the ERDC needed to fully understand the benefits and limitations associated with the techniques developed by the 2017 project team. Early research into the use of Performance Based Testing (PBT) for evaluating the condition of anchors in concrete dams was conducted in 2017. The research procedures established during the 2017 project relied upon the dam's ability to pull the anchors into resonance. This process deviated from current testing procedures because typical post-tensioned anchor tests are designed using basic equilibrium (static) equations."
Cybersecurity and Infrastructure Security Agency: https://www.cisa.gov/