Mill Flotation Improvements Value Engineering Study

RMGC wanted to study the potential for gold recovery in their milling facility through the expansion of their flotation circuit. They had initially worked with Samuel Engineering who developed a feasibility study proposing the Mill Flotation Expansion Project. Morrison-Maierle’s Value Engineering Study Scope of Work evaluates the proposed project to ensure
that the project scope has been optimized.

Starting with key project elements, as outlined by RMGC, Morrison-Maierle adopted a “nothing is sacred” approach that supported challenging assumptions and questioning all previous project design tactics. By challenging original design assumptions, while further developing design approaches, the team was able to leverage their recent project site design and construction experience to yield safe, constructible, maintenance-friendly, and economical design solutions.

As a result, the Value Engineering Study focused on the following key project elements:

• Minimize the proposed pre-engineered metal building (PEMB) footprint to house the flotation expansion equipment and remove unnecessary access platforms.
• Evaluate the bridge crane proposed in the Feasibility Study compared to roof hatches to accommodate access to the external crane.
• Use the revised RMGC single-line diagram to optimize the FS electrical requirements and utilize low-voltage gear where possible.
• Evaluate alternative flotation process equipment arrangements to use three rougher cells instead of the four cells proposed in the Feasibility Study.
• Remove the backup blower from the design, but leave floor space, piping, and electrical designs intact to allow for a future expansion.
• Produce a concrete and structural design to reduce contingency requirements.
• Produce a capital cost estimate for the optimized project.

Morrison-Maierle drafted and transmitted it to RMGC for review. Changes implemented during the study saved Round Mountain $5,733,530 compared to the initial design.