Earth Structures & Excavation

Principal Structures

Excavation for the principal structures commenced in December 2007 and was completed in February 2009. The work was done in two phases:

Phase 1: in winter 2007 / spring 2008 included the removal of approximately 650,000 cubic metres of overlying soil and bedrock.

Phase 2: had a further 525,000 cubic metres of bedrock removed during the summer and winter of 2008 from the areas of the principal structures and channels.

Total excavations were approximately 1,178,000 cubic metres of overlying soil and bedrock materials. In parallel with excavation, construction of the Stage I Upstream and Downstream Cofferdams were undertaken.

Main Dam

Construction of the main dam, spillway and powerhouse required excavation of approximately 860,000 cubic metres of bedrock and 1 million cubic metres of common excavation. Some of the bedrock excavation was used as rip-rap (large rocks used to prevent erosion of shorelines and dams) but the majority of the materials were disposed of in a permanent earth and rock-filled berm, which was constructed between Taskinigup Falls and Wuskwatim Falls. The General Civil Works Contractor completed the main dam in summer 2011, placing over 145,000 cubic metres of the impervious, granular and rock fill materials.

Channel Excavation

A channel was excavated immediately north and adjacent to Wuskwatim Falls through the peninsula. The channel improves outflow conditions from Wuskwatim Lake into the immediate forebay (reservoir) area, upstream of the powerhouse.

As with the access road, ceremonies were held to mark significant milestones and the inadvertent unearthing of any sacred sites. Environmental monitoring continued throughout.



discount yves saint laurent wallet fake yves saint laurent crossbody wallet Authentic yves saint laurent women bags replica online cheap louis vuitton belt replica Women belt prada replica store best yves saint laurent Dames sale Best birkin purse replica store hermes yves saint laurent totes bags replica Women shoulder bags 2015 yves saint laurent replica online buy fake prada purses louis vuitton replica on sale Hermes cheap replica sale men kelly louis vuitton borse italia Authentic replica store heels sandals christian louboutin chloe outlet Yves saint laurent women totes bags official outlet online 2014 prada handbags Handbags belt official chloe replica outlet louis vuitton outlet 2015 low price Official replica store women shoes christian louboutin Real bags sunglasses celine replica store cheap prada designer handbags Men women cheap red bottoms outlet replica celine outlet sale