(Monaca) -- Officials say an oil company's decision on whether to build a proposed petrochemical plant in western Pennsylvania may be pushed back to next year.  

Governor Corbett says he "never had June as a date'' for Shell Oil Company to decide on the multibillion-dollar plant.

The governor says he's always thought "it would be early next year," and conversations with officials indicate "they're still moving forward."

The June 30 deadline stems from a six-month extension Shell negotiated at year's end Horsehead Corp. for the site about 35 miles north of Pittsburgh.

The so-called cracker plant would convert natural gas liquids from the Marcellus Shale into chemicals such as ethylene used to make plastics and other products.

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