A controversial gold-silver-copper mine in Co Tyrone would bring a "significant and timely stimulus" to the economy for over 25 years if it gets planning permission, a review said today.
Research by business advisory firm EY, commissioned by Canadian mining company Dalradian, said the Curraghinalt mine would build "a more prosperous, competitive and regionally balanced economy".
It has said that the building of the mine would bring a £158m boost to the construction sector and when up and running, would generate a further £21m in salaries and £46m in supply chain expenditure annually. An additional £360m will be invested in capital equipment.
The firm has said the two-year construction would employ 300 people directly, and support another 910 jobs. It claims that when up and running, the mine will employ 350 people directly and support around 570 indirect and induced jobs.
Dalradian has been working on its proposals for the Sperrin Mountains site since 2010, submitting a planning application in late 2017.
Infrastructure Minister Nichola Mallon has ordered a public inquiry into the plans, which have drawn over 34,000 objections.
The company believes up to £3bn worth of gold could be deposited in the mountains.
However, campaigners against the mine have said they have grave concerns about its potential impact on the environment.
Sean Tracey said opposition remained strong, adding: "I believe that opposition has increased and the longer this application has taken the more people have become aware of the major negatives... As far as the majority of the local community is concerned this company does not and will not have a social license for this project.
"This can be reflected in the number of objections letters and the resolve the campaign still shows four and a half years later."
The EY report also says the mine would provide more highly skilled jobs, which would mean fewer people being forced to travel for work outside the area.
Patrick F N Anderson, Dalradian's president and CEO, said: "EY's review highlights that our proposal will have a major positive impact on the economy.
'Furthermore, it comments on the social and environmental aspects of the project, which are key considerations for us and our local community.
"The mine will provide a minimum of £4m in community funding, deliver a multi-million investment in training and further enhance the region's STEM skills which are essential for leveraging its existing strong manufacturing and engineering base," he added.
"Our project has been designed to respect the environment. It will be Europe's first carbon neutral mine, operating in tandem with the local environment and within strict regulatory standards."