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United States
Hasbrouck Project

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 Location:
287 km SE from Reno, Nevada, United States

  Project Contacts:
838 – 1100 Melville Street
Vancouver
British Columbia, Canada
V6E 4A6
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Fax604-484-4710
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  • Overview
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  • Geology
  • Mining
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  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePermitting
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Mine Life8.8 years (as of Jan 1, 2016)
The Hasbrouck Gold Project consists of two all-oxide gold-silver deposits eight km apart, near the Town of Tonopah in southern Nevada.

The Project's first pit, Three Hills Mine, is fully permitted and is now at 100% construction readiness, with a fully developed construction plan, a level-3 construction schedule, and issued-for-construction drawings, and waiting for a much more favorable pricing environment prior to making a construction decision.

The Project's second pit, Hasbrouck Mine, is scheduled to start producing two years after the start of the first pit, and has a federal permit and is close to being at 100% construction readiness.
Latest NewsWest Vault Mining Files on Sedar a Hasbrouck Gold Project Pre-Feasibility Study Update with a 51% IRR     March 8, 2023


Owners

Source:
CompanyInterestOwnership
West Vault Mining Inc. 100 % Indirect
Hasbrouck and Three Hills LLC (operator) 100 % Direct
On January 24, 2014, West Kirkland Mining (now West Vault Mining) signed a purchase agreement with Allied Nevada Gold Corp. (“ANV”) to acquire ANV’s Hasbrouck Project. On April 23, 2014 West Kirkland Mining purchased a 75% interest in the Hasbrouck Project.
As outlined in the purchase agreement, 100% title to the mineral rights underlying the Hasbrouck Project has been transferred into a Limited Liability Corporation (the “LLC”) for ownership and operating purposes.
Effective September 1, 2016, West Kirkland Mining transferred a 25% interest in the LLC to Waterton Precious Metals Fund (“Waterton”) and retained the remaining 75% interest after a formal operating agreement was executed during the year. [Q32018, MDA, p. 11]
On August 14, 2020 - West Vault Mining Inc. completed the purchase of a 25% interest in the Hasbrouck gold project. West Vault has now consolidated 100% ownership of the Hasbrouck Gold Project.

Contractors

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Deposit Type

  • Epithermal
  • Breccia pipe / Stockwork


Summary:

The Hasbrouck deposit is a low-sulfidation, epithermal gold–silver deposit located in the western portion of the Divide Mining District. Host rocks are primarily tuffs and sediments of the Siebert Formation with limited mineralization within the underlying Fraction Tuff. Gold and silver mineralization consists principally of 0.1in to 1.0in wide, discontinuous silica-pyrite veinlets, sheeted veinlets and stockworks, all closely associated with larger, but erratic bodies of hydrothermal breccia. Sulfide minerals have been largely oxidized. Mineralization is accompanied by strong pervasive silicification, with associated adularia and pyrite, and has a known extent of 2,800ft east–west by 2,400ft north–south, with a maximum depth of 900ft. Mineralization is open at depth and to a limited extent to the northwest and east.

Gold occurs as electrum, as inclusions in pyrite and in goethite derived from the partial to complete oxidation of pyrite, and within siliceous gangue minerals (Graney, 1985; Hazen, 1989). Silver occurs in the native state and in argentite (Wittkopp, 1982). Silver is also intimately associated with iron oxides derived from the oxidation of silver-rich sulfide minerals that occurred as inclusions in pyrite (Wittkopp, 1982).

Hasbrouck mineralization is primarily characterized as structurally-controlled, with secondary lithologic control. West-northwest and northeast fault orientations localize higher-grade mineralization (+0.05 oz Au/ton) wit ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Hasbrouck project PFS includes mining at both the Three Hills Mine and the Hasbrouck Mine. These are planned as open-pit, truck and loader operations. Access roads were included in the pit and waste rock storage area designs, which were considered suitable for the type of equipment used. Waste rock storage areas were designed to contain the rock waste associated with the reserves. One main waste rock storage areas was identified for Three Hills and 2 additional waste rock storage areas were designed for Hasbrouck. Safety berms were designed between the designed pits and dumps and US Highway 50 to contain any material that may try and roll off of the mining site.

Three Hills production schedules have been completed based on a 15,000tpd production requirement for the ROM heap-leach pad. In total, 504,000 cubic yards (702,000 tons) of waste rock is scheduled for construction purposes.

Hasbrouck Mine production schedules were completed based on a 17,500tpd production requirement. Mining at Hasbrouck was assumed to start during the second year of production for the project. Little pre-stripping is required as ore is located near the surface, though waste rock is mined early to provide construction fill material.

It is anticipated that the contractor will have between 60 and 80 operators and staff involved with the operation. It has been assumed that the contractor will work 12 hour shifts, 2 shifts per day, 7 days per week. Other mine ........


Crushing and Grinding
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Processing

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Summary:

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Projected Production:

CommodityUnitsAvg. AnnualLOM
Gold koz 71577
Silver koz  ......  Subscription required  ......  Subscription required
Gold Equivalent koz  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in doré.

Operational Metrics:

Metrics
Stripping / waste ratio 1.06 *
Waste tonnes, LOM 47,933 k tons *
Ore tonnes mined, LOM 45,270 k tons *
Total tonnes mined, LOM 93,203 k tons *
Daily processing rate 15,986 tons *
Annual ore mining rate 6 M tons *
* According to 2016 study.

Reserves at September 14, 2016:
Cut-off grade for Hasbrouck reserves: upper Siebert 0.008 oz Au/ton, and Hasbrouck lower Siebert 0.007 oz Au/ton.
Cut-off grade for Three Hills reserves: 0.005 oz Au/ton.
The Hasbrouck deposit gold and silver resources: 0.006oz AuEq/ton cutoff grade.
The Three Hills deposit gold resources: 0.005oz Au/ton cut-off grade.

CategoryTonnage CommodityGradeContained Metal
Proven 6,242 k tons Gold 0.02 oz/ton 127 koz
Proven 6,242 k tons Silver 0.41 oz/ton 2,562 koz
Probable 39,028 k tons Gold 0.016 oz/ton 461 koz
Probable 39,028 k tons Silver 0.273 oz/ton 8,007 koz
Proven & Probable 45,270 k tons Gold 0.017 oz/ton 762 koz
Proven & Probable 45,270 k tons Silver 0.233 oz/ton 10,569 koz
Measured 8,261 k tons Gold 0.017 oz/ton 143 koz
Measured 8,261 k tons Silver 0.357 oz/ton 2,949 koz
Indicated 56,821 k tons Gold 0.014 oz/ton 784 koz
Indicated 45,924 k tons Silver 0.243 oz/ton 11,147 koz
Measured & Indicated 65,082 k tons Gold 0.014 oz/ton 927 koz
Measured & Indicated 54,185 k tons Silver 0.26 oz/ton 14,096 koz
Inferred 14,340 k tons Gold 0.009 oz/ton 136 koz
Inferred 11,772 k tons Silver 0.191 oz/ton 2,249 koz

Commodity Production Costs:

CommodityUnitsAverage
Total cash costs Gold USD 661 / oz *†  
All-in sustaining costs (AISC) Gold USD 717 / oz *†  
Assumed price Silver USD 18.2 / oz *  
Assumed price Gold USD 1,275 / oz *  
* According to 2016 study / presentation.
† Net of By-Product.

Operating Costs:

Units2016
OP mining costs ($/ton mined) USD 3.62 *
Processing costs ($/ton milled) USD  ......  Subscription required
G&A ($/ton milled) USD  ......  Subscription required
Total operating costs ($/ton milled) USD  ......  Subscription required
* According to 2016 study.
Subscription required - Subscription is required.

2016 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 164.5
Refining and transportation $M USD  ......  Subscription required
G&A costs $M USD 20.6
Total OpEx $M USD  ......  Subscription required
Total Taxes $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Net revenue (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 5% $M USD  ......  Subscription required
Pre-tax NPV @ 10% $M USD  ......  Subscription required
Pre-tax NPV @ 8% $M USD  ......  Subscription required
After-tax NPV @ 5% $M USD  ......  Subscription required
After-tax NPV @ 10% $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Water Supply
TypeMaterialDiameterLengthDescription

Water Supply
No potable water supply will be installed at Three Hills Mine, potable water being obtained from the Tonopah water system. A potable water system will be installed at Hasbrouck Mine. This requires obtaining a water right to appropriate groundwater. Water rights have been applied for in 2014 and are currently under review by the state engineer.

Raw water is defined in this report as all water required by the project. It includes water for construction purposes, make-up water for mineral processing, water for dust control on mine roads and ore processing, and other sundry non-potable uses. Raw water is not required to meet potable water standards. The average rate of raw water that will be required at each mine is 500
gpm.

Water for the project is planned to be obtained from groundwater wells near each mine. For the Three Hills Mine, the water supply well will be located approximately 3,700ft north of the process facilities. For the Hasbrouck Mine, the water supply well will be located approximately 7,500ft west of the process facilities. Submersible pumps will be installed at a depth of 1,000ft in each well. Preliminary analysis of the existing water rights and groundwater conditions indicate that these wells can meet the project’s raw water requirements. Water rights for the Three Hills well have been applied for in 2014 and are currently under review by the state engineer.

Water Distribution
At both mines HDPE pipelines will be used to convey the required water from the supply wells to 500,000 gallon water storage tanks. At the Three Hills Mine, the water storage tank will be located adjacent to the process facilities. Due to the limited elevation difference between the tank and the facilities, pumps are required to boost pressure and provide adequate flow. At the Hasbrouck Mine, the water storage tank will be located east of the crusher facility. The location of the Hasbrouck tank will provide adequate pressure for the system and booster pumps will not be required.

The chosen route for the water pipeline from the water supply well to the Three Hills Mine will require the consent of a landowner whose land it will cross. Should the landowner in question decline permission, a slightly longer route exclusively on WKM-owned property will be used.

The water pipeline route between the water supply well and the Hasbrouck Mine will be on public land and approval for the well and pipeline installation will be obtained as part of the approval to construct the Hasbrouck Mine required under the National Environmental Protection Act.


Proposed Heavy Mobile Equipment as of September 14, 2016:
HME TypeModelSizeQuantityLeased or
Contractor
Crane 50 tons ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Dec 22, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 1, 2016
....................... Subscription required ....................... Subscription required Subscription required Sep 1, 2016
....................... Subscription required ....................... Subscription required Subscription required Sep 1, 2016
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Corporate Presentation 2018
Quarterly Report 2018
Pre-Feasibility Study Report 2016
Pre-Feasibility Study Report 2015
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News:

NewsDate
West Vault Mining Files on Sedar a Hasbrouck Gold Project Pre-Feasibility Study Update with a 51% IRR March 8, 2023

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