The city of Milton is taking formal ownership of an artifact of the terror attacks of Sept. 11, 2001 – a six-inch piece of steel recovered from the World Trade Center site where more than 2,700 people died.

The City Council recently approved an agreement with the Port Authority of New York and New Jersey officially transferring ownership of the artifact. The steel already is in Milton, having been presented to the Council Sept. 7 with remarks by the police and fire chiefs, and displayed by the Fire Department at Milton High School’s 9/11 observance, according to Sarah LaDart, Milton economic development manager.

The city will hold the artifact until a site and design for a 9/11 memorial — the plans for which are in “the very early stages,” according to city spokeswoman Shannon Ferguson — are complete. Milton resident Charlie Fisher led the effort to obtain the artifact, among the last of 10 available in a program that ended in August; he has formed Friends of the Milton 9/11 Memorial, a nonprofit, to plan the tribute.