How much do these projects cost?

Answer

According to Eversource and National Grid’s cost estimates, and verified in an independent study managed by ISO-NE, in February 2015, the Greater Boston and New Hampshire Solution capital costs were about $520 million.  An additional $220 million of “common projects” would also be completed at the same time.  At that time, the Greater Boston and New Hampshire Solution was more than $250 million lower in cost than the alternative.

As we continue to refine our project engineering and gather additional information on materials and other resources, we have identified some individual project cost estimate fluctuations – both up and down – but the aggregate cost remains $250+M less than the alternative.