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Lake Matoaka Dam Spillway

Rehabilitation of the Lake Matoaka Dam will allow for the safe overtopping of the embankment during an event of Probable Maximum Precipitation, bringing the dam into compliance with State Dam Safety Regulations. To achieve this, the downstream slope will be flattened, an articulated concrete mat (ACM) will be installed to armor against erosion and scour, concrete parapet and training walls will direct overtopping flows through the armored portion of the embankment, the existing box culvert will be repaired and modified to accommodate the new design, and a siphon will be installed through the existing spillway to regulate the upstream normal pool elevation.

Project Details
  • Project Number: 204 – 18003
  • Cost: $6,799,000
  • Fund Source: State
  • Start Date: Mar 2013
  • Construction Start Date: TBD
  • Finish Date: TBD
  • Project Manager: Matthew Rossi
  • Design Team: Draper Aden
  • Contractor: TBD
  • Progress: Design Complete
  • Rendering of new Lake Matoaka Dam

    The redeveloped Lake Matoaka Dam will achieve regulatory compliance with current Virginia Dam Safety regulations for overtopping condition.
    rendering by Draper Aden

  • Rendering of new Lake Matoaka Dam

    The dam will armor downstream face with Articulated Concrete Blocks (ACB) covered with soil.
    rendering by Draper Aden

  • Lake Matoaka Dam site plan

    Training walls will be added to channel flow.
    rendering by Draper Aden

  • Rendering of new Lake Matoaka Dam

    The dam will armor downstream face with Articulated Concrete Blocks (ACB) covered with soil.
    rendering by Draper Aden