Overview

Jerritt Canyon Gold retained Linkan Engineering to design a 1,400 gpm treatment system for underground mine dewatering discharge. The treatment technology is a vendor-packaged system of chemical oxidation and ferric addition using coagulation/filtration and ion exchange vessels for removal of arsenic and antimony. The plant is currently under construction.


The packaged system is installed inside an existing building that required equipment demolition and removal of existing treatment equipment. The required backwash holding tanks are situated in a new outdoor concrete containment area. Chemical storage tanks for this WTP are shared with the adjacent new Tailings WTP. The effluent of both plants is blended prior to discharge to injection wells


Challenges included accelerated design document preparation, designing the layout within available space, design of ancillary systems such as influent and effluent delivery pipelines, interconnecting pipe headers, tanks, and discharge pump systems that are not included in the vendor package.

A remote in-line booster pump station design was included, as well as injection wellhead configuration. The existing building electrical service was evaluated and upgraded to accommodate the new equipment. A SCADA system was designed to integrate the vendor control system with influent controls and instrumentation, as well as the effluent pumps. Interconnections for the plant SCADA to communicate with other mine systems are included, as well as a follow-on design for control of the underground dewatering pump system.

Additional Construction Management services provided include review of contractor shop submittals, RFIs, and liaison with State of Nevada NDEP and BMRR.

Project Highlights
  • 1,400 gpm
  • Removal of As, Sb
  • Shared infrastructure for cost savings
Project Value

$6.0 M capital cost

Project Duration

2016

Linkan’s Role
  • Pilot Verification Testing
  • Bench Testing
  • Detailed Design
  • Construction Supervision
  • Commissioning
Reference:

Mr. George Tinkorang
Jerritt Canton Gold LLC
775.738.5600 ext. 142

Project Features

  • Feed flow rate of 1,400 gpm
  • Available effluent pumping capacity up to 1,600 gpm
  • Equipment retrofit into an existing building, with maximum reuse of re-purposed equipment
  • Shared tankage and containment infrastructure with an adjacent facility to reduce capital costs