Crews with Stover Excavating of Plain City, Ohio, perform site grating for a temporary propane refrigeration plant at the MarkWest Energy location along Industrial Park Road. David Bradford, engineer for MarkWest, said the short-term facility should be under construction in June and operational by the end of this summer. It is a precursor to the larger cryogenic facility eyed to open by the end of this year. Construction bids are being taken for the larger plant at this time.