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Notice of Application
OSCA Application 1932870
EPEA Application 019-00020809
Canadian Natural Upgrading Limited
Muskeg River Mine Oil Sands Mine

The Alberta Energy Regulator (AER) has received Oil Sands Conservation Act (OSCA)application 1932870 and Environmental Protection and Enhancement Act (EPEA) application 019-00020809 from Canadian Natural Upgrading Limited (CNUL) for approval of proposed ready to reclaim criteria for the deposition of treated tailings at the Muskeg River Mine In‐Pit Cell 4 (MRM IPC4). The AER is reviewing the applications together with the supporting documents.

This notice also sets out the deadline for filing statements of concern on these applications. See the section below on how to file a statement of concern and for the filing date.

Description of the Application
CNUL has applied underOSCA approval 8512Mand EPEA approval 00020809-02-00 to include ready to reclaim criteria for the co-deposition of coarse sand tailings (CST) and materials treated by the centrifuge fluid fine tailings process (CFFT) at the MRM IPC4.

The applications seek an amendment of the currently approved ready to reclaim criteria presented in Appendix C of OSCA approval 8512M, and an amendment of EPEA approval 00020809-02-00, to address the deposition of a CFFT and CST treated tailings mixture in MRM IPC4.

IPC4 is located in the north-central section of the active Muskeg River Mine pit. The Muskeg River Mine project is located approximately 90 kilometres north of Fort McMurray, Alberta, in Township 95, Range 10, West of the 4th Meridian.

For a copy of the applications, contact

Canadian Natural Upgrading Limited
Suite 2100, 855 2nd Street SW
Calgary, Alberta  T2P 4J8
Attention: Scott Wytrychowski
Telephone: 403-517-7063
Email: @email

To receive a copy of the applications, and supporting documents, submit an information request, as outlined at, to

AER Information Distribution Services
Suite 1000, 250 – 5 Street SW
Calgary, Alberta  T2P 0R4
Telephone: 1-855-297-8311
(toll free; option 0)
Email: @email

Refer to this notice when requesting information for a faster response.

Requirement to File a Statement of Concern
If you have concerns with this application, you must file a statement of concern as described below. If you do not file a statement of concern, the AER may approve the application without further notification.

How to File a Statement of Concern
For your submission to be considered a valid statement of concern, it must be filed before 4:00 p.m. on May 26, 2021. Send one copy of your statement of concern to Canadian Natural Upgrading Limited at the name and address above and one copy to

Regulatory Applications
Alberta Energy Regulator
Suite 1000, 250 – 5 Street SW
Calgary, Alberta  T2P 0R4
Fax: 403-297-7336
Email: @email

Contents of a Statement of Concern
For your submission to be considered a valid statement of concern, it must include

  1. why you believe that you may be directly and adversely affected by a decision of the AER on the applications;
  2. the nature of your objection to the applications;
  3. the outcome of the applications that you advocate;
  4. the location of your land, residence, or activity in relation to the location of the energy resource activity that is the subject of the applications; and
  5. your contact information, including your name, address in Alberta, telephone number, and
    email address or, if you do not have an email address, your fax number.

The AER also requests that you include the application numbers in your statement of concern.

Section 49 of the Alberta Energy Regulator Rules of Practice (Rules of Practice) requires that all documents and information filed in a proceeding be placed on the public record. If you file a submission, you must not include any personal information that you do not want to appear on or are not authorized to put on the public record. Section 49(2) of the Rules of Practice states how to apply to the AER for an order to keep information confidential. The Rules of Practice is available on the AER website at

Submissions relating exclusively to compensation for land use are not dealt with by the AER and should be referred to the Alberta Surface Rights Board.

Under section 21 of the Responsible Energy Development Act, the AER does not have the jurisdiction to assess the adequacy of Crown consultation associated with the rights of aboriginal peoples as recognized and affirmed under the Constitution Act, 1982.

For information on AER procedures, contact the regulatory applications specialist, Josie Ferrara, by phone at 587-674-0661 or by email to @email.

Issued at Calgary, Alberta, on April 26, 2021.
Charlene Graham, General Counsel