Hasbrouck Mountain is a surface development project owned by WK Mining (USA) Ltd., a subsidiary of West Vault Mining Inc.. Hasbrouck Mountain is located in the northern portion of Esmeralda County, Nevada, approximately eight kilometers south of Tonopah, Nevada.

Silver and gold mineralization were first discovered on Hasbrouck Mountain in 1902. Early mining exploited the Kernick vein, which was worked on a small-scale through the mid-1920s. The Hasbrouck Project consists of the Hasbrouck and the Three Hills deposits and surrounding land package. A pre-feasibility study was completed for the Hasbrouck Project in 2016, and assumes Phase-1 production for two years at the Three Hills Mine followed by Phase-2 production for six years at the Hasbrouck Mine. The Phase-1 Three Hills Mine is fully permitted and permitting work is underway for the Phase-2 Hasbrouck Mine.