The document analyzes new US energy infrastructure construction data from 2009 to 2012. Some key findings:
1) Solar construction grew the fastest at a 4-year CAGR of 28%, driven by a 211% increase from 2010 to 2011.
2) Wind, biomass, and solar (Big 3 renewables) accounted for 74% of total new construction over the period, reaching 79% in 2012.
3) In 2011 and 2012, solar represented around 40% of all Big 3 renewable construction and 37-38% of total new construction.
4) Renewable energy represented double-digit percentages of total new construction annually and 39% of new generating capacity over the 4 years.