During a September 11 House Natural Resources Committee hearing, lawmakers and utility customers expressed concern over Energy Secretary Steven Chu’s March 16 plan to use modernize the four federal power marketing administrations, saying that they want him to delay implementation, which is scheduled to begin at the end of the year. Appearing before the committee, Lauren Azar, a senior policy advisor to the secretary, said that the agency is aiming to improve efficiencies and reduce costs. The most contentious part of the debate is whether the low-cost hydropower from federal dams the administrations sell and deliver will be used to subsidize wind and solar development in the Western United States.