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21

Stacking the Storms: Comparing the Probable Max Precipitation (PMP) Studies from the Mid-Atlantic to Inform Better Dam Design

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According to the Virginia Department of Conservation and Recreation regulations, high-hazard dams are required to pass 90% of the Probable Maximum Flood (PMF) or “most severe flood considered possible in a specific region.” The PMF results from the most severe combination of meteorologic and hydrologic conditions possible within a given drainage basin. Since the 1980s, […]

22

The Least NRCS NRCS Dam: Using HEC-RAS to Evaluate a Unique NRCS Dam.

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Crabtree Creek Dam No. 5A (CC5A) is a Natural Resource Conservation Service (NRCS) dam located in Wake County, North Carolina. The dam was constructed in 1973 along Interstate 40 (I-40). I-40 is a major interstate highway along the southeastern and southwestern portions of the United States. I-40 was constructed prior to the construction of CC5A, […]

24

Beyond Speculation: HydroTurf’s Proven Efficacy Examined through Village Creek Overtopping Data

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Lake and reservoir management presents a complex challenge requiring innovative solutions to address ecological, regulatory, and community welfare concerns. HydroTurf, a state-of-the-art erosion control solution for high hazard classified dams, stands out as it addresses all these concerns. This abstract uses a compelling case study—the application of HydroTurf at the Village Creek spillway owned by […]

25

Protecting Critical Infrastructure: Addressing Dam Safety and Cybersecurity Risks

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Dams are critical infrastructure that provide essential services such as water supply, hydropower, and flood control. However, aging infrastructure and the increasing connectivity of dam operations and control systems pose growing risks. This presentation will examine emerging challenges related to dam safety and cybersecurity. Specifically, it will cover: Key dam safety risks such as aging […]

26

So You Have a Dam EAP……Now What??? Tips and Best Practices on EAP Enhancements for Dam Owners

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Creation and adoption of Emergency Action Plans have increased significantly across the United States (especially for high hazard dams) over the past two decades, driven partly by regulatory requirements by state dam safety agencies and in some cases, proactive actions by responsible dam owners.  However, there is often not enough attention paid to what happens […]

28

How to Drain an Impoundment – Design, Repair and Replacement

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The Virginia Impounding Structure Regulations (Regulations) require that low-level outlet systems in existing dams be kept operational. For dams built without low-level outlet systems, the Regulations stipulate that low-level outlet systems be retrofitted when practicable. In December 2020, the Department of Conservation and Recreation (DCR) and Virginia Soil and Water Conservation Board published a new […]

29

Brighton Dam Rehabilitation

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The Brighton Dam is a concrete slab and buttress dam that has been in continual service for over 75 years.  Over those years, the dam developed a number of deficiencies that resulted in a reduction of the safety of the dam and increased difficulties in operation of the dam to its full capacity. These deficiencies […]

30

The Applicability of Filter Compatibility Evaluation Procedures for Existing Embankment Dams – Hearthstone Lake Dam Case Study and General Evaluation and Design Considerations

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Hearthstone Lake Dam was constructed in the mid-1960s in Augusta County, Virginia, under the administration of the NRCS. The dam, which is classified as a high hazard structure by the VA DCR and the NRCS, is located on US Forest Service property but is owned and maintained by the Headwaters SWCD and Augusta County. The […]