Mayor Walsh's office is filing plans with the Boston Conservation Commission today to replace the bridge to Long Island with a similar $92-million span.

To get around opposition from officials in Quincy - who have proposed banning construction vehicles from the roads leading to the Quincy end of the bridge, Boston would use barges to bring the larger pieces into place for assembly into a bridge that would let Boston build a new campus on the island for people who need drug and alcohol recovery services. The current plans do not, however, include any homeless shelters.

The proposed span would be similar to the one that was torn down in 2015 before it could collapse: One lane and walkway in either direction, with a channel near the middle of the bridge for boats to pass. The bridge would mostly use the old bridge's pilings and supports, which were left in place.

City officials emphasized the new facilities would care for anyone who lands up in Boston regardless of whether they were originally Boston residents. Marty Martinez, the city's chief of health and human services said:

Boston is a healthcare hub, with state-of-the-art hospitals and addiction treatment facilities that draw people in need from across the state to seek care and access a path to recovery. We are proud to offer these inroads to care, regardless of a client's origins, and we look forward to building out Long Island to further support all of the most vulnerable who come to us seeking help and support.

Increasingly furious Quincy officials, however, are having none of it. WBUR reports one Quincy city councilor talks darkly of hidden plans and says a boat should be good enough to get people to and from the proposed campus.