Canal Wall and Intake Repairs at Valve Island and North Canal
At a glance
What: Two applications to repair historic canal structures in the downtown historic district: DLHD-27-18, a temporary stabilization of the collapsed intake channel at Valve Island on Kearney Sq, and DLHD-27-19, repointing and pressure grouting of the North Canal wall and waste gatehouse on Pawtucket St.
Where it stands: DLHD-27-18 was continued on November 9, 2026 so the Board can get a long-term plan and more detail. DLHD-27-19 was approved with conditions: material, means and methods details, mortar specifications, and a mock-up area for Board review before work starts.
DLHD-27-18 (Valve Island intake): the applicant's engineer described a temporary repair using precast concrete abutments and steel beams in place of destabilized stone masonry, estimated at about 100,000 dollars and planned for late winter or early spring. The design of a permanent rehabilitation of the island area is expected to take six months to a year. Board members asked about monitoring, the visible appearance (it will not match the historic stone), protecting adjacent historic fabric, and how long "temporary" would last. The engineer said the Massachusetts Historical Commission found no adverse effect and that no Army Corps permit was needed. The Board continued the hearing by voice vote, and members asked for a commitment to a long-term plan, possible conditions such as a five-year update, and National Park Service input.
DLHD-27-19 (North Canal wall): a permanent repair, repointing and pressure-injecting grout along a wall of a couple hundred feet to stop active leaks, with vegetation removal and possibly one missing stone replaced. Members asked for details on materials, access, vegetation removal technique and stone matching, and a mortar mock-up. Approved with those conditions, with no opposition; the contractor submittals go through staff.
Figures and names come from auto-generated captions and may be misheard.