Constellation completes 16.1 MW PV project in Maryland; Ikea commissions 31st solar project, reaching 38 MW installed; IPL and MidAmerican install $545 million scrubber in Iowa; DTE partners with Enbridge and Spectra on pipeline for Utica shale gas; plus contracts and announcements from Dominion, Sempra, Southern Company, AEP, EPRI, Itron, Landis+Gyr, Opower and others.