My understanding is that the issue is between the main contractor -- the general contractor and the sub, and as far as I know that there would be no additional cost to the GNWT.
Robert C. McLeod on Question 291-18(2): Status Of Mackenzie Valley Fibre Optic Line Construction
In the Legislative Assembly on June 28th, 2016. See this statement in context.
Question 291-18(2): Status Of Mackenzie Valley Fibre Optic Line Construction
Oral Questions
June 27th, 2016
See context to find out what was said next.