Wendy Maeda/Globe staffGovernor Deval Patrick today lauded the managers of the construction project to replace 14 bridges on I-93, during a visit to the construction site's headquarters in Medford.
The massive project, underway for six weekends, has so far replaced nine spans along a stretch of I-93 north of Boston between Somerville and Medford, by carefully closing lanes during weekend hours.
According to planning documents, all major structural work will be completed by Aug. 29, with smaller efforts -- such as the completion of parapet walls, permanent barriers, and paving -- scheduled to be completed by Oct. 14.
The project, dubbed 93Fast14 by project organizers, is expected to replace 14 bridges at seven points on the highway this summer. The project relies on workers to cut away the old concrete and steel bridge decks and lower in place new ones using large cranes.
The $98.1 million project is part of the governor's wider accelerated bridge replacement project, that since 2008 has corrected or addressed 85 structurally deficient bridges, according to a statement by the governor's office. According to Patrick's office, 458 bridges around the state still await fixing or replacement in the eight-year, $3 billion effort.
In a statement, Patrick thanked the workers and supervisors on the project.
"Fast14 is one of the most ambitious and innovative infrastructure projects in the nation, and is a perfect example of the lasting investments we are making in infrastructure projects across the state," said Patrick in the statement.