Harm reduction (for opioids) in Canada

Here's a story from the Washington Post:
At the heart of Canada’s fentanyl crisis, extreme efforts that U.S. cities may follow

"the Overdose Prevention Society, took over a vacant building next door, giving users a clean indoor place to inject drugs. There are 29 similar sites in British Columbia, the epicenter of Canada’s drug crisis, and more across the country.

“To save lives, you need a table, chairs and some volunteers,” said Sarah Blyth, the manager here.
...
"As fentanyl rampages across North America, several U.S. cities have announced that they will open the first supervised drug-consumption sites like those in Canada. Their plans illustrate the gulf between the two nations: While Justin Trudeau’s government is doubling down on its “harm reduction” approach, any U.S. organization that tries to follow suit would be violating federal law and risking a confrontation with the Justice Department.
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See also this academic paper
Addressing the Nation’s Opioid Epidemic: Lessons from an Unsanctioned Supervised Injection Site in the U.S.
Alex H. Kral and Peter J. Davidson
American Journal of Preventive Medicine, 53, 6, 2017, 919 - 922

and this January 2017 news story
Awash in overdoses, Seattle creates safe sites for addicts to inject illegal drugs