DENISON ENVIRONMENTAL SERVICES

Denison Environmental Services (DES), which is headquartered in Elliot Lake, Ontario, is engaged in the rehabilitation and monitoring of closed mine sites. DES offers a complete decommissioning package from mine closure planning, through to implementation of a closure plan, then long-term care and maintenance and monitoring. Services offered include site restoration, asset disposal, demolition, tailings relocation, dam construction and decant decommissioning, hazardous material abatement, and long term treatment and monitoring of mine and tailings effluents.

DES boom truck working on the new Stanleigh Treatment Plant at Elliot Lake for Rio Algom

Over the past decade, DES has worked on a number of private and government sponsored projects in Ontario (Rio Algom, Bicroft), Québec (Yvan Vezina), Saskatchewan (Cluff Lake Uranium Mine) and Newfoundland and Labrador (Hope Brook Mine).

The primary activities of DES in 2008 were providing the ongoing monitoring of Denison’s two closed mine sites, environmental monitoring, effluent treatment and maintenance services for Rio Algom’s five closed Elliot Lake mines, effluent treatment and monitoring at the Ministry of Northern Development and Mines’ Kam Kotia property, the care and maintenance of the closed Vale Shebandowan Mine west of Thunder Bay, Ontario and the care and maintenance of a closed base metal mine at Les Mines Selbaie in Quebec. DES also carried out work on several other smaller contracts.

In July 2008, DES was awarded a three-year contract to perform care and maintenance at the Faro Complex, in the Yukon Territory, which includes the former Anvil Range properties at Faro and nearby Vangorda Plateau. DES has been tasked with ensuring that effluent from the site meets all regulatory criteria and that the facilities have the capacity and flexibility to cope with the dynamically fluctuating hydrologic and chemical conditions. Part of the plan is to ensure that all workers and contractors are trained to execute their jobs in a safe and responsible manner and that the site is in a mode of constant improvement. Another objective for the project is to support training and work initiatives that will benefit the local town and First Nations' communities during and beyond the care and maintenance mandate.

For more information on DES, please visit the DES website at www.denisonenvironmental.com.

Last updated April, 2009.