Brightsource's 500-megawatt Rio Mesa solar thermal project is being shelved after multiple delays, but the company is forging ahead with two similar projects that are further along in development. A Brightsource spokesperson confirmed the power purchase agreements (PPA) with Southern California Edison (SCE) for both Rio Mesa 1 and Rio Mesa 2 have been cancelled, and the permitting process for both sites have been suspended with the CED, though the company hopes to keep them available for future project consideration.