Complex sentence: The NGCP franchise only obliges the company to operate, manage, and maintain the transmission facilities which was given to the private investors and the right of eminent domain necessary to construct, expand, maintain, and operate the transmission system.
Split into simpler sentences: The NGCP franchise only obliges the company to operate, manage, and maintain the transmission facilities. Under its franchise, it has the right to operate and maintain the transmission system and related facilities, and the right of eminent domain necessary to construct, expand, maintain, and operate the transmission system.