Wood pulp, steel cables: Scientists study how to make ice roads last longer

Wood pulp, steel cables: Scientists study how to make ice roads last longer

There are at least 10,000 kilometres of Canadian roads that depend on freezing temperatures

The road should have been frozen solid, but it was anything but.

When drivers tried to travel the Mackenzie Valley winter road in the Northwest Territories last March, it was an unpassable highway of muck well before its usual closure date. Four communities were left without vehicle access.

That’s what Paul Barrette — using everything from steel cables to wood pulp — is working to prevent.

“It’s the only time of the year, those two or three months, when northern communities can resupply their needs in fuel, construction material and other bulk goods,” said Barrette, who leads a National Research Council team that is developing ways to keep winter and ice roads passable in a warming climate.

“What we’re looking at is to ensure those roads remain operational throughout these warm winters.”

Across Canada, there are at least 10,000 kilometres of roads that depend on freezing temperatures. Most are in Ontario, but they exist in four provinces and two territories.

For dozens of isolated communities, they are the only way in and out that doesn’t depend on a boat or plane. They are a lifeline for many resource projects.

Improved construction methods have slightly lengthened openings for most winter and ice roads.

But the number of days with freezing temperatures is shrinking across the North. Yukon and the Northwest Territories have already warmed 1.5 degrees Celsius, nearly three times the global average.

ALSO READ: Yukon government pulls plug on engineered ice bridge to West Dawson

A study of the winter road that leads from Yellowknife to the diamond mines of the Central Arctic predicts it will be unable to carry any heavy loads by the end of the century.

“If such a projection were to become reality, the (Tibbett-Contwoyto Road) and other winter roads in the region would no longer be viable to support the natural resource industry in northern Canada,” the study says.

Barrette said the problem is often the few hundred metres it takes to cross a river or a lake.

“The weakest link often happens to be over ice. When that happens, the road remains closed a whole winter so the community remains stranded a full year.”

Ice is tricky. It’s not as rigid as it seems and slowly deforms under a load.

“It creeps,” said Barrette. ”Say you park your vehicle on the ice. If you leave it there two or three hours, the vehicle may break through.”

Barrette and his colleagues are looking for ways to stiffen the ice and stop the creep.

In the past, operators have dropped logs onto the road and frozen them into the ice. But felling trees over the same spot year after year creates environmental issues. Besides, there are no trees further north in the tundra.

Barrette is looking to other materials. “Wood pulp is a possibility.”

Mixing wood pulp into ice hardens it. The blend was used during the Second World War to create an experimental aircraft carrier.

Laying steel cables into the ice is another possibility.

Most recently, Barrette has experimented with what are called “geotextiles” — in this case, a sheet of polypropylene mesh frozen into the road.

“They’ve got to be light enough, they have to be cheap enough, to be brought over on site,” said Barrette.

They also have to be environmentally sound. And they have to work. Barrette said none of the methods have yet been tested in the field.

“We’re actually studying this now,” he said. ”We’re trying to make this work.”

Barrette expects to have something he can field-test within a year, and says there is some urgency to help ice resist a warmer climate.

“Those on-ice segments are more sensitive to warm temperatures,” Barrette said.

“There is a risk of breakthroughs. Sometimes, the water’s deep.”

Bob Weber, The Canadian Press

Like us on Facebook and follow us on Twitter.

Just Posted

CVSE officer checking out all the trucks before the convoy, which started at Riverlodge Recreational Centre in Kitimat BC and finished at the George Little Park in Terrace BC. (Jacob Lubberts photo)
VIDEO: Kitimat truck drivers rally together in honour of 215 bodies discovered at Kamloops Residential School

The convoy started at Riverlodge Recreational Centre and finished at the George Little Park

Coast Mountains School District No. 82 acting superintendent of schools, Janet Meyer, talks about policies and procedures relating to the death of Diversity Morgan, a LGBTQ+ student. (Black Press file)
School District 82 to revisit policy after transgender student’s death

Diversity’ death has created a deeper resolve for CMSD 82 to continue doing the work they started

FILE – Perry Bellegarde, National Chief of the Assembly of First Nations, takes part in an event on Parliament Hill in Ottawa on Tuesday, July 7, 2020. THE CANADIAN PRESS/Sean Kilpatrick
Indigenous Peoples Day must be a ‘call to action’, says Assembly of First Nations chief

Discovery of children at Kamloops residential school site must lead to change, Perry Bellegarde says

Outside the Kitimat RCMP police station, Diversity Morgan’s family and Kitimat RCMP come together for a pride flag-raising ceremony. (Jacob Lubberts photo)
With heavy hearts, the Kitimat RCMP hosted a pride flag ceremony to highlight the RCMP’s commitment to inclusion and diversification, as well as honouring the passing of 15-year-old transgender student, Diversity Morgan, from Kitimat.
Speeches were given by Staff Sergeant Graham Morgan, Mayor Phil Germuth, Haisla Nation Chief Councillor Crystal Smith, and Diversity’s father, Mike Wilson.
“We are gathered here for the pride flag ceremony, but in my mind, we’re gathered here in solidarity for anyone who’s ever experienced prejudice or discrimination. […] Today we celebrate what makes us all unique individuals,” Mayor Phil Germuth said in his speech at the pride flag ceremony.
Struggling to get the words out, Crystal Smith, Haisla Nation’s chief councillor, emphasized her condolences to Diversity’s family in her speech sharing her similar experiences as well as acknowledging the need for education around these subjects.
Diversity’s father, Mike Wilson, said he wished that everyone was there under different circumstances but was grateful to see the turnout and the support from the community.
In honour of Diversity, the Kitimat RCMP also lowered their Canadian flag to half-mast, to bring awareness for people who are experiencing discrimination and are in need of additional support.
The Kitimat RCMP also stated that they will be lowering their Canadian flag around this time every year as a visual representation of LGBTQ+.
Kitimat Save-On-Foods also donated water and snacks for the ceremony.
Kitimat RCMP host pride flag ceremony in memory of Diversity Morgan

“We’re gathered here in solidarity for anyone who’s ever experienced prejudice or discrimination”

(Haisla First Nation logo)
Haisla Nation host walk for strength and series of virtual sessions for Indigenous History Month

The purpose of the walk is to bring Haisla Nation members together and show their collective support

The border crossing into the United States is seen during the COVID-19 pandemic in Lacolle, Que. on February 12, 2021. THE CANADIAN PRESS/Paul Chiasson
VIDEO: Border quarantine to soon lift for fully vaccinated Canadians

Eligible travellers must still take multiple COVID-19 tests

Chilliwack secondary school’s principal is apologizing after a quote equating graduation with the end of slavery in the U.S. was included in the 2020-2021 yearbook. (Screenshot from submitted SnapChat)
B.C. student’s yearbook quote equates grad to end of slavery; principal cites editing error

Black former student ‘disgusted’ as CSS principal apologizes for what is called an editing error

Skeena MLA Ellis Ross. (Photo by Peter Versteege)
BC Liberal leadership candidate condemns ‘senseless violence’ of Okanagan church fires

Skeena MLA Ellis Ross says reconciliation isn’t about revenge for past tragedies

A coroner’s inquest will be taking place at the Capitol Theatre in Port Alberni for the next week. (ELENA RARDON / ALBERNI VALLEY NEWS)
Teen B.C. mom who died following police custody recalled as ‘friend to many’

Police sent Jocelyn George to hospital after intoxication had gone ‘beyond the realm’ of normal detox

FILE - In this Nov. 29, 2020, file photo, Las Vegas Raiders defensive end Carl Nassib leaves the field after an NFL football game against the Atlanta Falcons in Atlanta. Nassib on Monday, June 21, 2021, became the first active NFL player to come out as gay. Nassib announced the news on Instagram, saying he was not doing it for the attention but because “I just think that representation and visibility are so important.” (AP Photo/John Bazemore, File)
Nassib becomes first active NFL player to come out as gay

More than a dozen NFL players have come out as gay after their careers were over

Penticton Indian Band Chief Greg Gabriel speaks to the Sacred Hearts Catholic Church burning down early Monday morning, June 21, 2021. (Monique Tamminga Western News)
Penticton band chief condemns suspicious burning of 2 Catholic churches

Both Catholic church fires are deemed suspicious, says RCMP

COVID-19 daily cases reported to B.C. public health, seven-day moving average to June 17, 2021. (B.C. Centre for Disease Control)
B.C.’s COVID-19 infections drop to 90 on Sunday, 45 Monday

Pandemic spread dwindles as 77% of adults receive vaccine

By protesting uninvited in First Nations’ territories, conservationists are acting in a neocolonial or paternalistic manner, says Huu-ay-aht Chief Robert Dennis. Photo by Heather Thomson
A closer look: do Vancouver Island First Nations support the war in the woods?

First Nations/environmentalist old growth alliance uneasy, if it exists at all

Bernadette Jordan addresses the media following a swearing in ceremony at Rideau Hall in Ottawa on January 14, 2019. Jordan says the government will provide $2 million to allow First Nations to continue to strengthen the marine safety system across Canada. THE CANADIAN PRESS/Adrian Wyld
First Nations receive federal funds to purchase marine rescue boats

Quatsino, Heiltsuk, and Kitasoo First Nation’s among eight across Canada to receive funding

Most Read