For the month of July, U.S. companies energized 91 miles of transmission line, bringing the total line miles placed into service so far in 2012 to 952.9, FERC said in its monthly infrastructure report.
On an annualized basis, 2012 is catching up to 2011, which saw a total 1,687 miles of transmission line completed. In June, about 194 line miles were completed.
But only about half of the proposed projects that would enter service by July 14 have a high probability of completion, FERC estimated. Of the total 21,911.9 miles of transmission projects proposed, 11,406.5 miles have a high probability of completion, FERC said.
While the bulk of the proposed projects are in the Western Electricity Coordinating Council region, the bulk of projects with a high probability of being completed are in the Texas Reliability Entity region, FERC noted.
Of the 91 miles placed into service in July, 73 miles were 230-kV and 18 miles were 345-kV. No 500-kV lines were completed last month.
July’s monthly total surpasses July 2011’s total of 1.3 miles of 230-kV line placed into service.
Among the projects completed last month were ITC Great Plains‘ Hugo to Valiant line, Central Maine Power‘s Wyman Hydro – Rice Rips line and Southwestern Electric Power Co.‘s Turk – Southeast Texarkana line.
FERC also noted the Arizona Corporation Commission’s July 30 approval of Tucson Electric Power’s $40m Pinal Central to Tortolita line.
For the January to July period, 254 miles of 230-kV, 528.8 miles of 345-kV line, and 170.1 miles of 500-kV line have been completed.
That compares to 909.3 miles of 230-kV line, 516.5 miles of 345-kV line and 262 miles of 500-kV line completed in 2011.
ITC Great Plains is a subsidiary of ITC Holdings (NYSE:ITC), SWEPCO is a subsidiary of American Electric Power (NYSE:AEP), Central Maine Power is a subsidiary of Iberdrola USA and Tucson Electric Power is a subsidiary of UniSource Energy (NYSE:UNS).