RALEIGH, N.C. (AP) — Duke Energy is expressing concern about proposed legislation requiring the closure of all of its North Carolina coal ash dumps by 2029, a deadline the company says is about half the time it will need.

The bill backed by Republican leaders in the state Senate was presented to a key committee Monday and could move to a floor vote later in the week. The measure would require Duke to remove its 100 million tons of coal ash now stored in 33 unlined pits across the state or seal it in place.