NioCorp Announces Positive Preliminary Economic Assessment Results for the Elk Creek Niobium Project


Vancouver, British Columbia – April 13, 2015 – NioCorp Developments Ltd. (“NioCorp” or the “Company”) [TSX: NB; OTCQX: NIOBF; and FSE: BR3] On behalf of our shareholders, NioCorp is pleased to announce the completion of a positive Preliminary Economic Assessment (PEA) study for the Elk Creek Niobium project.

Highlights of the PEA include:

  •   Pre-tax NPV of US$821 million with an IRR of 15.7%
  •   After-tax NPV of US$562 million with an IRR of 13.9%
  •   Average EBITDA of US$177 million annually
  •   A direct cash production cost for ferroniobium of US$6.50 per kg of niobium at an annualized

    production rate of 7,500 tonnes of ferroniobium per year for full production years, net of titanium dioxide

    and scandium trioxide credits

  •   Annual production of 23,000 tonnes of titanium dioxide and 12.8 tonnes of scandium trioxide
  •   An upfront capital cost of US$653 million, which includes US$136 million for the development of an

    underground mine and US$517 million for mineral processing, metallurgical and infrastructure costs

  •   Total upfront capital costs of US$919 million, which includes contingency and owner’s costs

    The basis for the PEA is a 3,700 tonne per day production rate over a 36 year operating life with an average grade of 0.82% Nb2O5. The NI 43-101 compliant resource supporting this production rate was disclosed in the Company’s press release of February 20, 2015. The PEA study was completed by SRK Consulting of Lakewood, Colorado and Roche Ltd. of Quebec City, Quebec.

    In addition to the underground mine, the Elk Creek PEA includes a surface crushing, grinding and mineral processing operation to produce a niobium concentrate. The niobium concentrate would be fed to a hydrometallurgical operation that would produce a niobium precipitate as well as titanium dioxide and scandium trioxide co-products. A final pyrometallurgical step would convert the niobium precipitate to ferroniobium using an aluminothermic reduction process. In order to support these processing steps, a number of ancillary facilities would be constructed, including stockpile areas, water pumping and treatment facilities, reagent and fuel storage areas, warehousing, utility installations, office space and a tailings impoundment. The underground mine would be accessed by a shaft and mined using longhole stoping methods with paste backfill utilizing tailings from the mineral processing operation.

    “The PEA results are an important milestone in the development of the Elk Creek resource, and I am very pleased to be able to announce results that demonstrate an extremely strong cash flow and very low ferroniobium production costs.” said Mark Smith, Executive Chairman of NioCorp. “We will use these results as the basis for a bankable feasibility study for the project, and will continue to pursue the most aggressive schedule possible to bring this world-class resource into production. As with many projects of this size and scope, the return is sensitive to the discount rate. The after tax return ranges from US$940 million to US $420 million with a discount rate between 6 – 9%. We have successfully removed many of the risks associated with the project and look forward to further de-risking as we move the project forward. I am looking forward to the completion of the formal PEA report in the near future.”

    TSX – NB OTCQX – NIOBF FSE – BR3

    Head Office – Suite 525, 999 West Hastings St. Vancouver, B.C., Canada V6C 2W2 Tel: 604-568-7365 www.NioCorp.com Fax: 604-568-8270

The PEA utilizes pricing of US$45/kg for Nb, US$2.10/kg for TiO2 and US$3,500/kg for Sc. The pricing model anticipates an increase in realized pricing for Nb to US$46/kg in year 4 of the operation, and US$48/kg in year 5. Pricing for Sc and TiO2 is held constant over the 36 year operating life.

Qualified Persons:

Martin Pittuck, MSc., C.Eng, MIMMM of SRK Consulting (UK) Ltd., a Qualified Person as defined by National Instrument 43-101, is responsible for the Elk Creek resource estimation and has read and approved the technical information contained in this news release.

Joanna Poeck, B.Eng., SME-RM, MMSA-QP, a Qualified Person as defined by National Instrument 43-101, is responsible for the Elk Creek mine plan resource and has read and approved the technical information contained in this news release.

Ben Parsons, MSc, MAusIMM (CP) of SRK Consulting (US) Inc., a Qualified Person as defined by National Instrument 43-101, is responsible for the Elk Creek resource estimation and has read and approved the technical information contained in this news release.

Alain Dorval, B.Sc, Roche Consulting Group Limited, a Qualified Person as defined by National Instrument 43- 101, is responsible for the Elk Creek mineral processing program and has read and approved the technical information contained in this news release.

Eric Larochelle, B.Eng, Roche Engineering Inc, a Qualified Person as defined by National Instrument 43-101, is responsible for the Elk Creek hydrometallurgical program and has read and approved the technical information contained in this news release.

About the Company: NioCorp is developing the only primary niobium deposit known to be under development in the U.S., and the highest grade undeveloped niobium deposit in North America, located near Elk Creek, Nebraska. The Company has previously announced a NI43-101 compliant resource with an effective date of February 20, 2015 reporting an Indicated Resource of 80.5 million tonnes grading 0.71% Nb2O5, 2.68% TiO2 and 72 ppm Sc and an Inferred Resource of 99.6 million tonnes grading 0.56% Nb2O5, 2.31% TiO2 and 63 ppm Sc (at a 0.3% Nb2O5 cutoff grade). Niobium is mainly used in the form of Ferro-Niobium to produce HSLA (High Strength, Low Alloy) steel, which is a lighter, stronger steel used in automotive, structural and pipeline applications. The U.S. imports 100% of its niobium needs. Titanium in the form of an oxide is used extensively as a pigment in paints, plastics and papers. As a metal, titanium is used in aerospace applications, armor, chemical processing applications, marine hardware applications, medical implants, power generation and in sporting goods. Scandium is used in solid oxide fuel cells (SOFCs) and aluminum-scandium alloys, as well as in ceramics, electronics, lasers and lighting applications.

For further information, contact the Company at (604) 568-7365 or via email at info@niocorp.com

ON BEHALF OF THE BOARD

“Peter Dickie”

Peter Dickie, Director and President

Neither TSX nor its Regulation Services Provider (as that term is defined in the policies of the TSX) accepts responsibility for the adequacy or accuracy of this release.

TSX – NB OTCQX – NIOBF FSE – BR3

Head Office – Suite 525, 999 West Hastings St. Vancouver, B.C., Canada V6C 2W2 Tel: 604-568-7365 www.NioCorp.com Fax: 604-568-8270

Certain statements contained in this press release may constitute forward-looking statements. Such forward-looking statements are based upon NioCorp’s reasonable expectations and business plan at the date hereof, which are subject to change depending on economic, political and competitive circumstances and contingencies. Readers are cautioned that such forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause a change in such assumptions and the actual outcomes and estimates to be materially different from those estimated or anticipated future results, achievements or position expressed or implied by those forward-looking statements. Risks, uncertainties and other factors that could cause NioCorp’s plans or prospects to change include changes in demand for and price of commodities (such as fuel and electricity) and currencies; changes or disruptions in the securities markets; legislative, political or economic developments; the need to obtain permits and comply with laws and regulations and other regulatory requirements; the possibility that actual results of work may differ from projections/expectations or may not realize the perceived potential of NioCorp’s projects; risks of accidents, equipment breakdowns and labour disputes or other unanticipated difficulties or interruptions; the possibility of cost overruns or unanticipated expenses in development programs; operating or technical difficulties in connection with exploration, mining or development activities; the speculative nature of mineral exploration and development, including the risks of diminishing quantities of grades of reserves and resources; and the risks involved in the exploration, development and mining business. NioCorp disclaims any intention or obligation to update or revise any forward-looking statements whether as a result of new information, future events or otherwise.

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