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Rubicon Minerals: Press Release #2 Dated Oct. 5, 2015 Re Mill Suspension

The following excerpt is from the company's SEC filing.


Exhibit 99.1

News Release

Rubicon Minerals Temporarily Suspends Mill Operations;

Underground Operations Continue During the Trial Stoping Period

TORONTO, Ontario –

Rubicon Minerals Corporation



” or the “


”) has been ordered by the Ministry of Environment and Climate Change (“

”) on September 30, 2015 to temporarily suspend mill operations at the Phoenix Gold Project (the “

”) to treat elevated ammonia levels, discharge sufficient water from the tailing s management facility (“

”), and to upgrade the TMF, under specific timelines. The initial order received on September 8, 2015 ordered Rubicon to commission new interim and permanent ammonia treatment systems for the effluent held in its TMF and discharge a portion of treated effluent. It also ordered Rubicon to undertake other operational and reporting obligations, including construction upgrades to the TMF. The initial order was amended by the MOECC on September 14, September 18, and September 30, 2015 to allow the Company time to upgrade its facilities in order to discharge treated effluent.

The Company has been utilizing alternative technologies to address the ammonia levels in the TMF. Rubicon has made progress with respect to treating the effluent and believes it can resume mill operations in a timely manner. Rubicon discharged an initial volume of treated effluent on September 30, 2015.

At the current time, underground development, construction and trial stoping continue uninterrupted.

“The Rubicon Management team and the Board of Directors take these matters seriously and are committed to operating at the highest environmental standards,” stated Michael Winship, interim President and Chief Executive Officer of Rubicon. “We have made progress towards treating the elevated ammonia levels in the effluent and have made it a priority to resolve these issues in a timely manner. Our underground operations continue uninterrupted during this time and we hope to resume mill operations shortly once we have met all the requirements outlined by the MOECC.”

Initial Order – September 8, 2015

On September 8, 2015 the MOECC issued a Director’s Order to Rubicon (the “

September 8, 2015 Order

”), the key components of which were to require Rubicon to:

Commission and implement a new interim ammonia treatment system so that 140,000 m

of treated effluent can be discharged from the TMF to the natural environment before November 30, 2015;

PR15-16 For more information, contact Allan Candelario, Vice President of Investor Relations

Phone: +1 (416) 766-2804 | E-mail: |

Rubicon Minerals Corporation | Suite 400–44 Victoria St. | Toronto ON, CANADA M5C 1Y2

The Toronto Stock Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release

Page 2 of 4

File an application for the approval of a new permanent ammonia treatment system and have the system installed, commissioned, and operational by April 1, 2016;

Construct the North-East Dam, an upgrade to the current TMF, for the Project by November 15, 2015;

Undertake other steps to control runoff and ensure that the TMF Maximum Operating Water Level is not exceeded; and

Submit a variety of routine monitoring analyses, reports and studies to the MOECC.

The September 8, 2015 Order was amended on two occasions to adjust the date for the commencement of the Item (1) discharge.

Amended Order – September 30, 2015

On September 30, 2015, a third amending order was issued by the Director (the “

Director’s Order Amendment No. 3

”), the key components of which were to amend the September 8, 2015 Order to:

Allow Rubicon to commence the discharge of the 140,000 m

on September 30, 2015;

Require submission of a report by October 9, 2015 containing various updates and engineering opinions; and

Suspend the discharge of mill process wastewater to the TMF until Rubicon can satisfy the MOECC of its progress towards the implementation of ammonia treatment measures.

Summary Effect of the Orders

The net effect of the orders is to temporarily suspend mill operations and the discharge of mill process wastewater to the TMF until the interim ammonia treatment system can be commissioned and proven effective to the MOECC’s satisfaction. Based upon the current advice of our engineering...