After a 13-year push for a new Deparment of Public Works facility, construction is set to begin soon, following Monday’s overwhelming approval at Special Town Meeting. Selectmen chairman William Plasko said the 152-12 vote gave the project more than the two-thirds majority needed to move forward. “It went a lot smoother than we expected,” he said in an interview. “I’m very pleased.” He said construction bids are expected to be awarded this month. Plasko said he has been working since 2001 to help come up with, and build support for, a plan for a new DPW site. “It’s really been deplorable conditions for years,’’ he said of the current facility. He said $16.8 million is being earmarked for the project, though it could cost less, he said, if all goes well. DPW operations may be temporarily located on property off Winter Street during construction, he said.