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Work on a Trans Mountain pipeline crossing in a British Columbia stream has destroyed salmon habitat, raising concerns about the Crown corporation’s ability to build infrastructure through waterways if the expansion project proceeds, a scientist says.

Mike Pearson says the “amateur hour” work on the Stewart Creek crossing in Chilliwack will reduce food sources for coho and chum salmon and limit their ability to hide from predators. The fish are part of the diet of endangered southern resident killer whales.

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“There was no consideration given whatsoever to the habitat, which is just not acceptable,” said Pearson, a biologist with 30 years’ experience.

Photo by Mike Pearson / THE CANADIAN PRESS

Trans Mountain Corp. filed documents with the National Energy Board showing its plans to cover exposed pipe in the Fraser Valley creek. It wrote that it would place concrete mats in the channel, extending about eight metres upstream and nine metres downstream of the exposed line, and cover it with small stones.