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Problems with the Dam
- NCDENR Dam Safety Concerns
– Inadequate Spillway Capacity – Condition of the Concrete - ASR – Condition of the Gates – Foundation Seepage – Erosion
- Undermining
- Downstream
Problems with the Dam NCDENR Dam Safety Concerns Inadequate - - PowerPoint PPT Presentation
Problems with the Dam NCDENR Dam Safety Concerns Inadequate - - PowerPoint PPT Presentation
1 P resentation for: Linville Land Harbor Dam Dam Alternatives Analyses Discussion May 11, 2007 2 Problems with the Dam NCDENR Dam Safety Concerns Inadequate Spillway Capacity Condition of the Concrete - ASR Condition of
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Purpose
- Meet requirements of DENR, Dam Safety
- Evaluate the hydrology and hydraulics
– Develop Spillway Design Flood – Iterations of spillway configurations – Downstream and Lakefront impacts – Selection of two spillway configurations – Cost analysis for the two options
- Not duplicate previous work
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Purpose
- Other work
– Assist with the Emergency Action Plan – Perform Preliminary Environmental Assessment – Perform a Bathymetric Survey of Lakebed
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Purpose
- Likely Options for Dam Alternatives may
include or be a combination of:
– Labyrinth Spillway Section – Overflow Spillway – Overtopping Protection – Gate for Reservoir Drawdown (Dam Safety)
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Labyrinth Spillways
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H
L
C Q ´ ´ =
Spillway Outflow Calculation
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Yahoola Creek Dam, GA
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Whitewater Lake Dam, GA
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Waterford Lake Dam, NC
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- Construction
– River Diversion – Earth Tie-in
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Stilling Basin
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Roller Compacted Concrete
- What is it?
- Why do you use it in dams?
- What use for Land Harbor Dam?
– Control Spillway Section – Overtopping Protection
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Overflow Spillways
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Steps for Energy Dissipation
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Base Flow
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Emergency Flow
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OVERTOPPING PROTECTION
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Topsoil Covered
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Drain and Minimum Flow Release
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