June 20, 2008
Ms. Kristin Kara, Senior Project Manager
Boston Redevelopment Authority
One City Hall Square
Boston, MA 02201-1007
Subject: Seaport Square
Dear Ms. Kara:
Thank you for the opportunity to comment on the Project Notification Form for this significant development. The Boston Groundwater Trust was established by the Boston City Council to monitor groundwater levels in sections of the City where the integrity of building foundations is threatened by low groundwater levels and to make recommendations for solving the problem. Therefore, my comments are limited to groundwater related issues.
I am pleased that the proponent has acknowledged in the PNF that Parcels H, J, K, and Q within the overall plan are included in the Groundwater Conservation Overlay District. As stated in the PNF, within this section of the GCOD there is no requirement for groundwater recharge, but there is a requirement to demonstrate that the project cannot cause a reduction of groundwater levels on the site or on abutting lots. These sections of the project immediately abut the Fort Point Channel area of South Boston, where the majority of the buildings are supported on vulnerable wood piling foundations.
On Parcels H and J, which are included in the request to waive further Article 80 review, there is a small underground construction planned. The proponent did state at the scoping session that there would be a partial basement on Parcel H that would likely not extend below Elevation 7 BCB, but also confirmed that there are no planned underdrains and that any underground sections would be waterproofed. I am pleased with their positive statements of support and compliance with GCOD requirements.
The buildings planned for Parcels K and Q will include a substantial underground garage. I am again pleased with the proponent’s pledge that the buildings will comply with the GCOD. At this location it will be important to understand how the standards will be met. This should be addressed in the DPIR covering these parcels.
The PNF states that groundwater monitoring wells will be installed during planned future subsurface explorations. If possible, these wells should be installed in locations that will be accessible in the future and should be made available to the Trust to incorporate into our observation well network when no longer needed for construction. Groundwater levels should be monitored before construction to establish a baseline and then during to construction to assure that they are not being drawn down. Results should be made available to the Authority and to the Trust shortly after they are gathered.
The attitude expressed by the proponent toward groundwater issues both in the PNF and during the scoping session has been very positive. I look forward to working with them and the Authority to assure that this project cannot have a negative effect on groundwater levels.
Very truly yours,
Elliott Laffer
Executive Director
Cc: Jay Rourke, BRA
Kathleen Pederson, BRA
Maura Zlody, BED
