A long planned gas-fired power station in Carlsbad that squeaked through approval largely because it was the only source that could be up and running by the end of 2017 will not be complete by that date after all. David Knox, communications director with plant owner NRG Energy, confirmed construction has not begun and the powerhouse won’t be complete until the end of 2018, or later if there are further legal appeals. An inewsource examination of utility filings has also found the new plant will be much dirtier than its original design.