The energy firm EDF has revealed it has spent £5.3bn using South West companies to build the new Hinkley Point C power station in Somerset.
This is one of a number of benefits outlined in the company's annual socio-economic report.
Hinkley Point C Head of Social Impact, Andrew Cockcroft said Hinkley was "providing really significant benefits, long-term opportunities for people and businesses here in Somerset, and across the South West region as a whole".
But as construction reaches its peak, with up to 15,000 workers expected on site, concerns have also been raised that more needs to be done to mitigate the impact of living near the biggest building site in Europe.
The billions spent in the area range from local firms providing food to advanced engineering companies.
But concerns have centred around the difficulty of other firms finding apprentices, parts for construction and problems on the roads in that part of Somerset.
One councillor has also described the local rental market as "broken".
But at Hinkley Point C (HPC), the new report shows some 5,000 people, a third of the people working on site, are from Somerset or the wider region.
That is also the case for 70% of the 1,500 apprentices that are working at there.
Grants totalling £17m have been awarded to local community projects like Bridgwater Carnival and Burnham BMX club.
