Teck is a public company listed on the TSX. Therefore, they have lots of shareholders to keep happy - including the directors and managers who are also shareholders.
Managements best interest is served by simply getting on with their business (i.e. developing mines) as quickly and as effectively as possible because converting metals mined into revenue and profit increases the value of their shares, likely delivers big annual bonuses and helps them keep their jobs.
CUU management are knowledgeable mining experts. They are also shareholders of CUU. Difficult to understand why they would allow Teck to drill in areas that do not make geological sense without taking this knowledge to the appropriate authorities and, perhaps, the media - after all, CUU has 2 representatives on the 4 member JV management committee and will know and be part of how things progress until someone buys CUU