Project: Mt. Hamilton Project

Client: Mt. Hamilton LLC

Location: Nevada

Mt. Hamilton Project – Mt. Hamilton LLC, Nevada

Mt. Hamilton Project – Mt. Hamilton LLC, Nevada

Project Background 

The Centennial-Seligman Project is a permitted open-pit gold mining, milling, and cyanide heap leach operation located in White Pine County approximately 28 miles east of Eureka, Nevada. The Project was mined for a few years in the early 1990s; however, all mining was ceased by the time Mt. Hamilton, LLC acquired the Project. Since 2016, we have supported Mt. Hamilton, LLC by submitting permit modifications and renewals, and tracking regulatory compliance requirements in an overall effort to keep permits in good standing with the agencies.  

Major Projects 

Permit Modifications 

Sunstone submitted multiple permit modifications and renewals for Mt. Hamilton, LLC to optimize future production and maintain compliance. Sunstone completed a Plan of Operations modification that included moving the crusher from private to public lands and relocating the ore conveyor system from underground to above-ground across Forest Service lands. We also prepared a Water Pollution Control Permit renewal application in 2018 and have submitted multiple air permit extensions. White Pine County requested water use for road maintenance from one of Mt. Hamilton’s wells at the Mine. Sunstone prepared and submitted a water right change application to the NDWR that allowed the County to complete their road maintenance obligations.   

Other Projects 


To maintain compliance with the Water Pollution Control Permit, we conduct groundwater sampling and perform a site inspection quarterly at the Project for Mt. Hamilton, LLC. We submit compliance reports for various state agencies including BMRR WPCP compliance reports, Reclamation Permit annual reports, NDWR pumpage reports, and BAPC annual reports. Our goal is to maintain good standing with the regulators and keep all permits up to date. Sunstone’s detailed tracking ensures that no deadlines will be overlooked. 

Project Manager: Eric Dougherty, PMP – Vice President / Senior Consultant

Eric Dougherty

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Scope of Work: