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Bluestone Dam Safety Assurance Project

Bluestone Dam Safety Assurance Project. It probably won’t fail (as far as you know). Bluestone Dam showing dam face, stilling basin and penstocks. History . Dam was built between 1941 and 1949 It’s purpose was and is to control flooding in the New and Kanawha River Valleys

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Bluestone Dam Safety Assurance Project

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  1. Bluestone Dam Safety Assurance Project It probably won’t fail (as far as you know)

  2. Bluestone Dam showing dam face, stilling basin and penstocks

  3. History • Dam was built between 1941 and 1949 • It’s purpose was and is to control flooding in the New and Kanawha River Valleys • It is constructed of a series of concrete monoliths standing side by side and interlocked across the valley • Monoliths were not anchored into the bedrock

  4. Statistics • 2048 feet long • 55 interlocked concrete monoliths • 165 feet high from the river bed • 200 feet wide at the base

  5. Pouring Concrete

  6. View across the downstream face showing interlocking monoliths

  7. Current Problems • Recent calculations have shown that the possibility exists for the dam to fail based on the monoliths sliding on the bedrock and • The possibility of erosion/scour undermining the front of the dam and • Overtopping is also a threat which would contribute to scouring • A series of projects are currently underway to both stabilize the dam and increase the amount of flood water it can hold

  8. Upstream or back side of dam

  9. Potential for Harm • Catastrophic flooding from the dam in southeastern WV to the Ohio River • West Virginia State Capitol building would be flooded to third floor. • Chemicals from large scale industry would be spread down the valley • Hundreds of thousands of residents would be affected

  10. Remediation Program • 216 high strength anchors were added to critical monoliths • The dam will be raised 8 feet by installing a precast concrete wall on top of the existing structure and an additional monolith on the East side in conjunction with • A swing gate closure across route 20 on the West side of the dam • Installation of sacrificial bulkheads on the penstocks

  11. Anchor Installation

  12. Remediation Program • Installation of scour protection and training walls for the penstocks • Installation of high strength anchors over the stilling basis • Improvements to the spillway

  13. Completed high strength anchor

  14. Current Status • Dam is exponentially safer than this time last year • Project is 11years into a 20 -25 year project • In the event that danger level is neared, flood causing amounts will be released • During the current rain events, Bluestone Dam is the only flood control dam not increasing it’s capacity

  15. Questions? Lisa R. Morgan, PMP Project Manager U.S. Army Corps of Engineers 502 Eighth Street Huntington, WV 25701 304-399-5545 Lisa.r.morgan@usace.army.mil

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