Closures were to last 10 months, but uranium market has not improved enough to restart the sites.
Unifor alleges Compass Minerals has been flying in replacement workers from New Brunswick to break the strike.
Construction will begin in the summer, will take approximately five years to complete.
Engineers could begin tapping into the green energy source by 2020.
Significant pressure event shoots fireball through vents in the sides and roof of the building.
Mine in the city of Qitaihe in Heilongjiang province was unlicensed.
State news agency said all workers trapped at gypsum mine cave in have been accounted for.
Meanwhile thousands of other abandoned mines leak.
Contaminated water contained high levels of arsenic, lead and other potentially toxic heavy metals.
Robbers take $8.5 million in gold, authorities call it an inside job.
Layoffs affecting strip mine and coal cleaning plant in Alberta blamed on low coal prices.
Mildred Lake and Centrifuge Tailings Management take bulk of the spending.
Langham residents worry about water being contaminated by leaking chemicals.
385 km from Cheecham to Edmonton and the start-point for major oil sands exporting.
Union report says workers earn low wages and work in unsafe conditions.