During the demolition and clearing of the site, it was discovered the existing school was built on rock that there were areas with significant depressions. As part of the original construction, these areas were filled with a combination of boulders and sandy fill. A GNWT technical group assessed the fill and determined it is not suitable as structural fill. For this reason this material had to be taken out to expose clean bedrock to anchor the building as designed.
The fill materials located in the parking area were placed there in the interim with the hope they could be used for other non-structural fill purposes as well as to expedite the clearing of the overburden by shortening the turnaround time for the haul trucks. This decision resulted in having the foundation survey completed sooner as well as attempting to establish the most cost effective solution between the current site condition and any altered foundation design. The contractor has started removing this material.
With the unforeseen foundation condition, there will be an additional cost to address the situation, as well as an impact to the construction schedule. However, the project completion date of August 2022 is not at risk at this time.