The MTA has mapped out the East Harlem properties it still needs to acquire via eminent domain before stretching the Second Avenue Subway from the Upper East Side to 125th Street, according to court records. Jamie Torres-Springer, the president of MTA Construction & Development, said after the August board meeting that the agency is “making progress” toward rounding up the East Harlem properties that are essential to the line. In this case, that will involve some in the path of boring tunnels north along Second Avenue and then curving westward along 125th Street to a site west of Malcolm X Boulevard. “We are way, way ahead of where that project was in terms of acquisitions,” Janno Lieber, MTA chairperson and chief executive, said after the August board meeting. “It’s like something going right through your back yard,” said Andrea Cerda, who lives in one of the East 125th Street buildings the MTA needs for construction.