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Uranium One

Willow Creek Mine

Willow Creek is an in situ recovery uranium mine located in Johnson and Campbell Counties in the Powder River Basin of Wyoming, U.S.A.  The mine includes the licensed and permitted Irigaray ISR central processing plant, the Christensen Ranch satellite ISR facility and associated uranium ore bodies, collectively referred to as the Willow Creek mine.  The mine is owned by a wholly-owned subsidiary of Uranium One.

Production

Commercial operations at the Willow Creek mine commenced in May 2012, following a 17 month pilot-production (commissioning) program conducted during the period from December 2010 to April 2012. The Willow Creek Mine was successfully commissioned and commercial operations commenced on May 1, 2012.

The current design capacity of Willow Creek is 1,300,000 lbs U3O8 (500 t U) per year.  Uranium One plans to expand the processing capacity at the Willow Creek central plant in line with the U.S. Nuclear Regulatory Commission (“NRC”) licensed capacity of 2,500,000 lbs U3O8 (962 t U) per year by incorporating a vacuum dryer that was purchased for use at Uranium One’s Moore Ranch project.

Uranium is extracted at the Willow Creek mine using the in situ recovery method, and processed using ion exchange technology at the neighbouring Irigaray and Christensen Ranch processing facilities owned by Uranium One.

Most recently, in 2013, Willow Creek produced 940,000 lbs U3O8 (239 t U).

Mineral Resources and Mineral Reserves

The following table sets out the mineral resource and mineral reserve estimates for the Willow Creek mine as of December 31, 2013.


Ore


Grade


Tonnes 

(t U)

Grade 

U3O8

(M Ibs U3O8)


(000s tonnes)
(% U)
100%

Attrib.

(%U3O8)
100%Attrib.
Measured


-------
Indicated9,843
0.066
6,4616,461
0.077
16,798
16,798
Measured & Indicated9,843
0.066
6,461
6,461
0.077
16,798
16,798
Inferred 940.05854540.068141141
Proven-------
Probable6,494
0.040
2,598
2,598
0.047
6,7546,754
Proven & Probable6,494
0.040
2,598
2,598
0.047
6,754
6,754

Notes:

(1)   Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.  Inferred Mineral Resources have a great amount of uncertainty as to their existence and as to their economic feasibility.  Under no circumstances can it be assumed that all or any part of an Inferred Mineral Resource will ever be upgraded to a higher Mineral Resource category or converted to Mineral Reserves.

(2)   The foregoing Mineral Resource and Mineral Reserve estimates are taken from Uranium One’s Summary of Mineral Resources and Mineral Reserves at June 30th 2013 outlined in "Uranium One Announces a 5% Increase in Q3 2013 Production to 3.2 Million Pounds at an Average Total Cash Cost of $16 per Pound Sold" on November 4, 2013, and are subject to the methods, parameters, assumptions, qualifications and procedures which are set out in such document. For a complete description of such methods, parameters, assumptions, qualifications and procedures, reference should be made to the full text of the foregoing document, which is available for review on SEDAR under Uranium One’s profile located at the following website: www.sedar.com.  Mineral Resources and Mineral Reserves are reported in accordance with Definition Standards on Mineral Resources and Mineral Reserves adopted by the Council of the Canadian Institute of Mining, Metallurgy and Petroleum and National Instrument 43-101 – Standards of Disclosure for Mineral Projects promulgated by the Canadian Securities Administrators.