Plans for a new mine in West Cumbria are being revealed to the public this weekend.
West Cumbria Mining plan to use existing tunnels and portals left over from the old mines. They say they've found billions of tonnes of coking coal - which is used in the steel industry - that stretches out for five miles under the sea.
The company is due to apply for planning permission next year.
But they say that the sale of Tata steel sites in the UK doesn't affect their mining goals:
West Cumbria Mining say they've received positive support and they'll do their best to limit environmental impacts.
But the Allerdale and Copeland Green Party say that's not enough:
Millions of tonnes of coal was mined from Haig Pitt in Whitehaven, until it closed in 1986.
If West Cumbria Mining's planning permission is approved, they could start extracting coal in 2019.