The solar projects are expected to enter service in late 2017.
For the construction of the facilities, Dominion Energy and AWS will enter into long-term power purchase agreements.
The facilities are expected to increase Dominion's operating solar fleet to 1,400MW in eight states by 2017.
The capacity also includes 434MW in the states of North Carolina and Virginia, where the company plans to increase its solar generating capacity to at least 500MW by 2020.
Dominion chairman, president and chief executive officer Thomas Farrell II said: “This alliance with Amazon Web Services will include the two largest solar farms in the mid-Atlantic.
“This solar expansion is great for Dominion, Amazon and the Commonwealth of Virginia. It helps AWS meet its renewable needs, it expands Virginia's clean electric generation fleet, and it creates economic development opportunities in largely rural communities.”
By acquiring four 20MW projects from Virginia Solar, Dominion will develop these facilities in Buckingham, New Kent, Powhatan and Sussex Counties for AWS.
An engineering, procurement and construction (EPC) contract has been signed with Strata Solar for the development of the projects.
Dominion is also acquiring a 100MW development from Community Energy Solar and will develop it in Southampton County. Signal Energy will act as the EPC contractor for the project.
The 260MW solar capacity of the alliance would generate enough electricity to power 65,000 typical homes and businesses.
AWS Infrastructure vice president Peter DeSantis said: “By enabling 10 utility scale renewable projects in the US to date, we are well-positioned to meet our latest goal of 50% renewable energy powering the AWS global infrastructure by the end of 2017.
“That said, we are nowhere near done. We will continue to make progress toward 100% and have many exciting initiatives planned."
