The two power plants at Coryton in Stanford-le-Hope (£600m) and Spalding (£400m) are for InterGen and are awaiting Government UK Guarantee approval for financing.
Jones Bros made it into the top 10 with its share of a £300m wind farm for Vattenfall in Pen Y Cymoedd near Neath with ABB and Balfour Beatty.
Countryside landed a £150m contract to regenerate the Alma Estate in north London for joint clients, Newlon Housing Trust and the London Borough of Enfield.
Balfour Balfour and engineering and rail specialist Spencer were lifted up the rankings with the East Kent Re-signalling Phase 2, value £150m.
The top places in the 12-month rolling league were unchanged with Balfour Beatty well clear at the top.
Third-ranked Mace is slowly closing the gap on second place Morgan Sindall, while Kier ranks fourth on value of work won but boasts the biggest number of contract wins over the 12 months at 273.