WASHINGTON — The National Park Service named a Massachusetts contractor to repair the Washington Monument’s earthquake damage, though it may take two more months before work begins at the National Mall site.
Perini Management Services Inc. of Framingham beat out two other bidders on Wednesday to win a $9.6 million contract that includes extensive repairs to the monument’s stonework. It will involve building massive scaffolding around the 555-foot-tall monument, sealing cracks inside and out, repointing the mortar, cleaning the exterior, and strengthening weak spots with metal brackets. The total cost of repairs, including work already completed, is $15 million.
Federal officials said the contractor’s parent company was the prime contractor for the construction of the Ronald Reagan Building, Washington’s largest federal building. The 118-year-old company has worked on such varied projects as the trans-Alaska pipeline and, in Massachusetts, the Turnpike extension and the Prudential Center.
The contractor’s team also includes firms involved in a restoration of the monument completed in 2000.
‘‘We are again one step closer to getting this important landmark reopened to our visitors,’’ said Robert Vogel, superintendent of the National Mall and Memorial Parks.
The marble and granite obelisk has been closed to the public since a 5.8-magnitude earthquake shook the region on Aug. 23, 2011. The upper portion of the monument sustained large cracks when it shook violently during the quake. It will likely remain closed to visitors until 2014.
Once work begins, the project will take 12 to 18 months to complete, officials said.
Congress allocated $7.5 million to pay for repairs. In January, a Washington businessman, David Rubenstein, pledged another $7.5 million.