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United States
Centennial Project

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 Location:
109 km N from Denver, Colorado, United States

  Project Contacts:
Suite #140 - 5575 DTC Parkway
Greenwood Village
Colorado, United States
80111
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
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  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeIn-Situ
Commodities
  • Uranium
  • U3O8
Mining Method
  • Solution mining
Processing
  • In-Situ Recovery (ISR)
  • Ion Exchange (IX)
Mine Life14 years (as of Jan 1, 2010)


Owners

Source: p. 84
CompanyInterestOwnership
Azarga Uranium Corp. 100 % Indirect
The Company’s 100% owned Centennial Project is located in the western part of Weld County in northeastern Colorado.

Deposit Type

  • Sandstone


Summary:

Uranium deposits in the Centennial Project are sandstone, roll front type typical of those in Wyoming, South Dakota and Texas. These type deposits are usually “C” shaped in cross section, a few tens of feet-to-100 or more-feet wide and often thousands of feet long. Uranium minerals are usually deposited at the interface of oxidizing solutions and reducing solutions or redox boundaries. Typical alteration associated with this redox boundary consists of limonitic and hematitic staining of the sandstones.

As the uranium minerals precipitate, they coat sand grains and fill the interstices between grains. As long as oxidizing groundwater movement is constant, minerals will be solubilized in the interior portion of the “C” shape, and precipitated in the exterior portion of the “C” shape, increasing the tenor of the ore body by multiple migration and accretion. The thickness of the ore body is generally a factor of the thickness of the sandstone host unit. Mineralization may be 10 to 15ft thick within the roll front while being inches to feet thick in the tail portions.

Ore mineralogy consists of uraninite, pitchblende, coffinite, and carnotite, with associated vanadium in some deposits. Typical alteration in the roll-front sandstone deposit includes oxidation of iron minerals up-dip from the front and reduction of iron minerals down-dip along advancing redox interface boundaries.


Mining Methods

  • Solution mining


Summary:

The Centennial mineralization is located at depths of 100 to 500 feet below surface, as primarily three separate mineralized horizons, which are sinuous and narrow but extend for several miles along trend. The deposits are planned for ISR mining by development of individual well fields for each mineralized horizon. A well field will be developed as a series of injection and recovery wells, with a pattern to fit the mineralized horizon, typically a five-spot well pattern on 70 to 100 foot (ft) drillhole spacing depending on local hydrogeologic character.

The Centennial Project has two sections, the Northern project area and the Southern project area, both of which will be developed for ISR mining. The Northern deposits are located below the water table in the host formations with conditions favorable for ISR methods. Much of the mineralization in the Southern project area lies at or just above the water table, which will require a localized enhancement of the water table with a well field encircling freshwater injection fence to facilitate ISR mining methods.


Crushing and Grinding


Processing

  • In-Situ Recovery (ISR)
  • Ion Exchange (IX)

Source: Subscription required

Summary:

A Central Processing Plant (CPP) will be constructed in the Northern project area, and a satellite facility (SF) in the Southern project area. The SF will only contain ion exchange vessels for resin loading, and the loaded resin will be hauled by truck to the CPP. The central uranium recovery and processing plant is planned to produce uranium as “yellowcake”.

Total recovery of uranium from the mineral deposits is projected at 75%. This value is an estimate based on similar existing operations in Powertech’s experience profile. Leaching studies were conducted in a lab setting to support this estimate of recovery. Therefore, the overall potential yellowcake production is estimated to be 9.52 million pounds U3O8. Considering the well field development and production schedule, the life of mine, at a production rate of 700,000 pounds per year U3O8 is 14 years.

In principle, in situ recovery from permeable sandstone formations i ........

Recoveries & Grades:

CommodityParameterAvg. LOM
Uranium (U3O8) Recovery Rate, %  ......  Subscription required
Subscription required - Subscription is required.

Projected Production:

CommodityUnitsAvg. AnnualLOM
Uranium (U3O8) k lbs 7009,523
All production numbers are expressed as U3O8.


Reserves at June 2, 2010:

CategoryTonnage CommodityGradeContained Metal
Indicated 6,873,199 tons U3O8 0.09 % 10,371,571 lbs
Inferred 1,364,703 tons U3O8 0.09 % 2,325,514 lbs

Commodity Production Costs:

CommodityUnits2020
Cash costs U3O8 USD 35 / lb *
Assumed price U3O8 USD 65 / lb *
* According to 2010 study / presentation.
Subscription required - Subscription is required.

2010 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
Processing OpEx $M USD 61.9
Total OpEx $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Net revenue (LOM) $M USD  ......  Subscription required
Operating margin (LOM) $M USD  ......  Subscription required
Net Income (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 8% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
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Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 21, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2020
Preliminary Economic Assessment 2010
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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