DENVER (AP) — Sen. Michael Bennet is asking the Veterans Affairs Department to quickly produce a plan for funding and finishing the Denver VA hospital, which is $1 billion over budget and months behind schedule.

The Colorado Democrat said Friday the VA must provide details about how it plans to spend the additional $830 million needed to finish the hospital in suburban Aurora.

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The hospital is now expected to cost $1.73 billion and won’t open before 2017. As recently as last year, VA officials said it would cost $630 million and be completed in 2015.

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The VA says it’s investigating what went wrong. The department says its top construction executive retired last week, one day after investigators interviewed him under oath.

The hospital will replace a crowded, aging facility in Denver.

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