Several crews from Coastal GasLink Pipeline were in last week Houston with trucks and ATVs doing surveys.
TransCanada spokesperson Shawn Howard says they were "conducting non-intrusive environmental field studies."
"This environmental survey work allows us to properly understand the wildlife, cultural, traditional and habitat of the areas along the pipeline route so that we can develop plans in a thoughtful and respectful manner," he said.
"The work we are doing is in areas where we have permission to do so and people are aware in advance that these environmental surveys will be taking place."
Coastal GasLink is a natural gas pipeline proposed to run 650 kilometres from Dawson Creek to the proposed LNG Canada facility near Kitimat.
It is working to get the required approval from government and the environmental review started in January, 2014, according to website.
Pending all the approvals, Coastal GasLink plans to start construction in 2015.