Workers finished a 43-hour concrete pour at the V.C. Summer nuclear plant Monday, completing the basemat for its new unit 3 AP1000 reactor.

Chicago Bridge & Iron is overseeing construction of two new Westinghouse reactors for Santee Cooper and Scana subsidiary South Carolina Electric and Gas. According to a Scana release, the most recent milestone at the plant required 7,000 cubic yards of concrete applied in one continuous pour until the foundation of the new reactor reached six feet in thickness. Unit 2, which saw its first nuclear concrete poured seven months ago, is scheduled to come online in late 2017 or early 2018, followed by unit 3.

While reporting third quarter earnings last week, a Scana presentation to shareholders offered the following images of recent construction at the site. (Westinghouse also provided the image of a completed CA-01 module from an AP1000 unit in China.)

2013 V.C. Summer nuclear plant construction. Source: Scana

2013 V.C. Summer nuclear plant construction. Source: Scana

2013 V.C. Summer nuclear plant construction. Source: Scana

2013 V.C. Summer nuclear plant construction. Source: Scana

2013 V.C. Summer nuclear plant construction. Source: Scana