U of M researchers tell Manitoba Hydro to mow less

University of Manitoba researchers have an idea that they say will save Manitoba Hydro money: mow less.

• Manitoba Hydro wants to raise rates 46% in 5 years

Nicola Koper and Lionel Leston published studies in two journals this year Landscape and Urban Planning, and Avian Conservation and Ecology showing if mowing and herbicide use under some sections of power lineswere curbed, the grass underneath the lineswould attract more species of butterflies, including threatened monarch butterflies, along with bird species.

The researchers, who used a grant from Manitoba Hydro for their work,said the grass is usually ignored by conservationists and the public. Koper and Leston said Manitoba Hydro would save cash by mowing less and suggested the money saved could be used to plant native grass and wildflowers.

"This can be a win-win for wildlife and industry," said Koper in a media release. The researchers said the changeswould make power lines beneficial to prairie wildlife, which is under threat. The researchers say just one per cent of Manitoba's original 6,000 square kilometres of tall-grass prairies remainstoday.

Need to cut for safety: Hydro

Manitoba Hydro said it's reviewing the study but needs to mow right-of-ways in urban areas to control weeds.

Hydro spokesperson Bruce Owen said herbicides are used to limit tree growth in areas close to power lines because tree contact is one of the leading causes of unplanned power outages in the province.

Owen said vegetation control is also neededso Hydro crews canaccess linesto make repairs andduring emergencies.

Still, Leston said Hydro doesn't have to mow areas completely and could be more careful going forward.

"You could leave certain sections," he said.