Property Description and Location
The Midwest project is owned by Denison (25.17%) and its joint venture partners, ARC (69.16%) and OURD (5.67%). ARC is the operator/manager. Denison, ARC and OURD are also the joint venture partners in the McClean Lake joint venture and the owners of the McClean Lake mill. It is currently planned that the Midwest ore will be processed at the McClean Lake mill.
The Midwest project is located near South McMahon Lake approximately 15 kilometres from the McClean Lake Mill. The site is approximately 750 kilometres north of Saskatoon.
Since the completion of the underground test mine at the Midwest deposit in 1988 and 1989, the site has been under an environmental monitoring and site security surveillance program. At present, there is an inactive water treatment plant, two water storage ponds and a core storage area on the site, as well as a dam in the Mink Arm of South McMahon Lake. All of the facilities used in the test mine program and all of the existing surface facilities are located on lands owned by the province of Saskatchewan. The right to use and occupy the lands was granted in a surface lease agreement with the province of Saskatchewan. The original surface lease agreement of 1988 was replaced by a new agreement in 2002. This new surface lease is valid for a period of 33 years. Obligations under the surface lease agreement primarily relate to annual reporting regarding the status of the environment, the land development and progress made on northern employment and business development. The Midwest surface lease covers an area of approximately 646 hectares.
Accessibility, Climate, Infrastructure and Physiography Access to the Midwest project is by both road and air. Goods are transported to the site by truck over an all--weather road that connects to the provincial highway system. Air transportation is provided through the Points North airstrip approximately 4 kilometres from the project site. The nearest permanent community is Wollaston Post, about 70 kilometres from the property on the other side of Wollaston Lake.
Site activities are carried out all year despite the cold weather during the winter months. Mean daily temperatures range from --25°C in January to +15°C in July. The average length of the frost--free period is about 90 days.
Water for industrial activities is obtained from one of the many lakes that surround the area. Electric power can be accessed from the provincial grid through nearby Points North.
No tailings storage areas are expected to be required at Midwest since it is planned that all Midwest ore will be transported to the McClean Lake mill for processing, with all resulting tailings being disposed of in McClean Lake's licensed TMF.
Surface facilities and infrastructure at the Midwest project will consist of a water treatment plant and other facilities necessary to support the mining operation and the ore shipment activities. Ample area for these facilities is available on the existing surface lease.
The terrain at Midwest is typical of the Athabasca Basin area with glacial drift features following northeast-southwest trends to produce sand and gravel ridges. These ridges are surrounded by low lying ground which is often water logged and dominated by muskeg. Over 25% of the area is covered by small ponds and lakes. Jack pine and spruce, rarely more than 10 metres high, are the predominant trees. Surface elevations range from 400 to 500 metres above sea level.
The Midwest deposit is representative of typical unconformity style mineralization, whereby 99.5% of the resources are located at the basement sandstone contact either in the basal conglomerate or in the upper basement unit.
Locally, mineralized lenses occur along steep faults above and below the main unconformity mineralization. These are termed "perched" and "deep basement mineralization" respectively.
The Midwest A deposit is located at a depth of between 175 and 210 metres below the surface. It consists of several sub-parallel high grade mineralized zones. These zones are surrounded by low-grade remobilized and clay-rich mineralization. The mineralized zones also exhibit structurally controlled roots that extend as much as 70 metres beneath the unconformity.
Please see Annual Information Form
for further information on the Midwest Project.