Who We Are
The Mount Nansen Remediation LP is a joint venture between Ensero Solutions and JDS Energy & Mining. We are working together as the Mount Nansen Remediation Limited Partnership with the Little Salmon Carmacks First Nation and the Government of Canada to clean up and reclaim the abandoned Mount Nansen Mine Site.
How We Came Together
Ensero Solutions (formerly Alexco Environmental Group) offers a wide variety of environmental consulting and reclamation/remediation services to clients across a number of sectors including mining, oil and gas, government, First Nation and private industry.
JDS Energy and Mining brings to the team strong experience and demonstrated success in engineering, construction, and field operations. They have successfully implemented projects around the world as well as managed the engineering and construction of the Minto Mine in the Yukon in 2007 and 2008.
The unique combination of Ensero Solution’s experience and success in environmental assessment, permitting and environmental remediation and operations along with JDS Energy and Mining’s experience in engineering, construction, and field operations will bring a very qualified team and approach to the Mount Nansen Remediation Project.
Mount Nansen Mine Site
Site Location
Mount Nansen mine site is a 1200 ha property located approximately 60 km west of Carmacks, in south-central Yukon Territory in north-western Canada. This property sits within the Little Salmon/Carmacks First Nation traditional territory.
Historical Mine
Mount Nansen was a gold and silver mine, abandoned in 1999 by their former owners. Underground development occurred in the 1960's and 70's and the site was mined again between 1996 and 1999.
The mine shut down due to poor recoveries, tailings dam geotechinical stability issues and water license non-compliances. The Brown-McDade open pit generated 240 000 cubic meters of tailings and 360 000 cubic meters of PAG waste rock.
Project History
In 1999, Mount Nansen mine was declared abandoned and the Government of Canada took charge of the site.
In 2003, the Yukon Government, the Canadian Government as well as Little Salmon/Carmacks First Nation, were involved in the planning and development of a remediation plan.
The three governments conducted an evaluation process in 2011 to determine the remediation option that best meets the objectives.
By 2012, a preferred remediation plan was agreed upon by all three governments, which includes:
-
Backfill the pit with tailings and contaminated material;
-
Demolish the mill and other abandoned buildings;
-
Install a cover pit;
-
Remove the tailings dam; and,
-
Restore the Dome Creek valley
The conceptual remediation plan was completed and accepted by all three governments in 2014.
In 2019, Mount Nansen Remediation Limited Partnership signed agreements with the Government of Canada and Little Salmon/Carmacks First Nation to undertake the remediation and environmental monitoring of the Mount Nansen site.
Project History
Pre - 1943
Traditional Use
1943 to 1999
Exploration and Mining
1999
Mt Nansen declared abandoned and Government of Canada takes charge of the site
2003
Yukon Government, Government of Canada and LSCFN were involved in the planning and development of a remediation plan
2011
The three governments conducted an evaluation process to determine the remediation option that best meets the objectives
2012
A preferred remediation plan was agreed upon by all three governments, which includes:
-
Backfill the pit with tailings and contaminated material.
-
Demolish the mill and other abandoned buildings.
-
Install a cover on the pit.
-
Remove the tailings dam and Restore the Dome Creek valley
2014
The conceptual remediation plan was completed and accepted by all three governments
2019
MNLRP signed agreements with Government of Canada and LSCFN to undertake the remediation and environmental monitoring of the Mt Nansen Site
2021
June 2021
Design Remediation Plan accepted by Canada
2021
August 2021
Care and Maintenance Water License Issued
2021
September 2021
MNLRP took over Care and Maintenance of the Mt Nansen Site
Project HISTORY
What are our remediation objectives for the abandoned Mount Nansen mine site?
1994
Traditional Use
1999
Exploration and Mining
Mt Nansen declared abandoned and Government of Canada takes charge of the site
2003
Yukon Government, Government of Canada and LSCFN were involved in the planning and development of a remediation plan
2012
A preferred remediation plan was agreed upon by all three governments, which includes:
-
Backfill the pit with tailings and contaminated material.
-
Demolish the mill and other abandoned buildings.
-
Install a cover on the pit.
-
Remove the tailings dam and Restore the Dome Creek valley
2011
The three governments conducted an evaluation process to determine the remediation option that best meets the objectives
2014
The conceptual remediation plan was completed and accepted by all three governments
2019
MNLRP signed agreements with Government of Canada and LSCFN to undertake the remediation and environmental monitoring of the Mt Nansen Site
2021
June 2021
Design Remediation Plan accepted by Canada
August 2021
Care and Maintenance Water License Issued
September 2021
MNLRP took over Care and Maintenance of the Mt Nansen Site
2027
Remediation Plan
Water Licensing Process
2029
Final Remediation Plan
2030
Site Remediation
& Clean Up (seasonal)
2032
Monitoring Remediation Performance