The railway's management predicts the scheme will generate over £70 million for the south west economy within five years.
The scheme to build the road generated hundreds of objections and a lengthy public enquiry.
The scheme, she said, has generated more than 66,000 telephone calls.
The scheme generates in average 4,500 GWh electricity per year.
The scheme thus generates 24 groups of households.
The railway believes that the scheme will generate over £70 million for the south west economy within five years.
The scheme generates on average 960 GWh of electricity per year.
Regulators say that scheme generated $6.7 million in profits.
Ministers also expect the scheme to generate thousands of new jobs.
The scheme generated £323,545 in revenue for usage in the first 96 days.