Roles, Responsibilities, and Paradigms: The Journey of a Dam Safety Program-Paper

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The Tennessee Valley Authority (TVA), created in 1933 to support the Tennessee Valley through power generation, flood control, navigation, and economic development, owns a diverse portfolio of dams and impoundments. The 2008 Kingston ash-dike failure—though outside the formal dam safety program—exposed weaknesses in accountability, communication, standardization, and oversight, prompting a major program transformation.<br /><br />TVA established a centralized Dam Safety Governance and Oversight office, formalized agency-wide procedures, and strengthened internal committees and independent external reviews. It also shifted from relying primarily on standards-based assessments to risk-informed decision-making. Screening assessments and detailed risk analyses now help TVA identify potential failure modes, prioritize work across its dam portfolio, and communicate risks at both technical and executive levels.<br /><br />The Boone Dam project demonstrated how these changes affected project delivery. After signs of internal erosion emerged in 2014, TVA restricted reservoir levels and undertook a major remediation involving grouting and a concrete cutoff wall extending through the embankment and into its complex karst foundation. Because construction involved substantial uncertainty and close interdependence between design and field work, TVA reconsidered its conventional contractor oversight model. For the cutoff-wall phase, TVA became Engineer of Record and engaged the specialty contractor directly, streamlining communication and decision-making while maintaining independent technical, quality, and dam safety reviews.<br /><br />The project’s organizational changes gave TVA greater direct control over decisions affecting dam safety and project objectives. The authors conclude that centralized governance, risk-informed management, and adaptable owner-contractor partnerships have strengthened TVA’s ability to manage dam risks and deliver complex rehabilitation projects.

Keywords

Tennessee Valley Authority

dam safety

risk-informed decision-making

governance and oversight

Kingston ash-dike failure

Boone Dam

concrete cutoff wall

karst foundation

internal erosion

owner-contractor partnership