The N.C. Utilities Commission has ruled that Duke Energy Progress customers are liable for essentially all the costs of cleaning up the utility’s coal ash operation, but the commission has imposed a $30 million “mismanagement penalty” on the company That essentially means Duke Progress can recover $202.4 million of the more than $240 million it sought to bill customers for upgrading its coal ash operations to meet new state and federal regulations. The commission rejected Duke Progress’…