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Successful Permitting of Expansion to the 2nd Tallest Centerline-Construction Tailings Dam in the World
Custer County, Idaho, USA
|Client||Thompson Creek Mining Company|
|Services||Tailings Management, Geotechnical Engineering, Permitting & Stakeholder Engagement, Seismic Analysis; Detailed Design|
To design a 100-million-ton expansion to the existing Bruno Creek Tailings Impoundment at a molybdenum mine located in seismically active Custer County, Idaho. At the start of the Phase 8 expansion project, the existing tailings dam height of 550 feet made it the second tallest centerline-raise cycloned sand dam in the world. It will reach nearly 750 feet following the Phase 8 expansion.
The results of the alternatives evaluation required partial realignment of the dam crest at the left abutment, resulting in a short length of the dam being constructed over an existing tailings beach. Further, the Phase 8 design incorporated steepening of the downstream dam slope from 3H:1V to 2.75H:1V, as well as construction of a 40-foot raise on the existing Rock Toe Dam. The project met regulatory requirements, achieving a permit from the Idaho Department of Water Resources (IDWR) in early 2008.
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Permitting and Stakeholder Engagement
We pride ourselves at Golder in being able to advise clients on the critical requirements for seeking their environmental permits. We are...
On a daily basis, Golder Associates works with our clients on mines around the world to permit, develop, design, build, operate and close...