~ Next Meeting: Thursday September 19th, 4PM at the Lenox Hotel

~ Next Meeting: Thursday September 19th, 4PM at the Lenox Hotel

Meeting agendas are posted in the Public Notices section on the City of Boston website.

Preserving the Foundations of Boston’s Historic Structures


The Boston Groundwater Trust (BGwT) was established in 1986 by the Boston City Council with the primary objective of monitoring groundwater levels in specific city sections. The focus areas are those where the stability of building foundations, which are supported by wood pilings, is at risk due to low groundwater levels. The accompanying video (viewed best in desktop mode) visually represents a typical row house in a filled land area in Boston. These houses are supported on wood piles capped with granite blocks, showcasing the traditional foundation method used from the 1800’s to the early 1920’s. It's evident that when the groundwater level remains above the tops of the wood piles, they can maintain their strength and effectively bear the weight of the building. However, a decline in the groundwater level leads to the exposure of wood piles to air, initiating a process of decay that compromises the stability of the building, ultimately posing safety hazards.


Thank You Tim Mitchell!

After dedicated service as a Trustee for an extensive 27 years, Tim Mitchell has made the decision to step down from his position. Initially chosen by the late Mayor Menino as a representative of the Neighborhood Association of the Back Bay when the Trust was reinstated in 1997, Tim played an integral role as co-chair alongside Gary Saunders in rejuvenating the Board and its Trustees during his tenure from 1997 to 2022. Tim's astute leadership was instrumental in securing funding for the observation well network, appointing Elliott Laffer as Executive Director, and spearheading the establishment of the Groundwater Conservation Overlay District (GCOD) article 32 zoning in 2006, followed by subsequent crucial amendments in 2021.

Over the last 27 years, I have had the pleasure and good fortune to work side-by-side with Tim Mitchell as co-chair of the Groundwater Trust. Over the course of those decades, Tim’s leadership was an invaluable part of taking the Trust from a young organization to become a thriving and critical part of the effort to preserve Boston’s historic neighborhoods. Tim, you have my unswerving appreciation for your time, energy and leadership!
Gary Saunders, BGwT co-chair, Trustee, Back Bay Association

Tim, congratulations to you on your retirement from the Boston Groundwater Trust! The Trust was lucky to have you serve as co-chair for so many years, from its inception up until the near present. We will miss your calm, polite, incisive and knowledgeable presence.  Wishing you a long, happy and healthy retirement!
Janine Commerford, Secretary, Trustee, Greater Boston Real Estate Board


It's fair to say that, without the efforts of Tim and Gary Saunders, the BGwT as we know it would never have existed.  Before the Trust had professional staff, they were carrying almost all of the burden of convincing people how important the issue is, commenting on proposed projects, and pushing for funding that would allow for the installation and monitoring of the well network.  He has done all of that as a volunteer. The City and all who loves its historic made land neighborhoods owe Tim a HUGE thank you.
Elliott Laffer, Trustee, Neighborhood Association of the Back Bay, BGwT Executive Director 2004-2014


Tim, it’s been a pleasure to serve with you on the Trust this past year. Thank you for all you’ve done for the Trust and Boston over the years!
Nick Pittman, Trustee, Fenway Community Development Corporation

Throughout the span of 27 years, I have had the pleasure of working alongside Tim, fostering a professional relationship that stands as a rarity in today's fast-paced work landscape. Besides his roles as co-chair and Trustee, Tim assumed the position of a mentor, dedicating significant time to impart invaluable guidance, advice, and knowledge to me — a gesture that surpasses any resource that could be found through customary searches or literature. I am truly appreciative of all your support and guidance throughout the years. Thank you, Tim, for everything you have done for me professionally and for the City of Boston!
Christian Simonelli, BGwT Executive Director


“Together we can make Boston the greenest City in the country and one whose future is as bright as our foundations are strong .”

— Honorable Mayor Michelle Wu, City of Boston

WOOD PILE VIDEO SERIES

Wood Piles: Preserving Boston's First Deep Foundations

A look into how Boston became the City it is today and why the Boston Groundwater Trust monitors groundwater levels.

Wood Piles: Preserving and Maintaining Groundwater Levels

A look into how the Boston Groundwater Trust helps preserve and maintain groundwater levels.

Wood Piles: The Process of Underpinning

A look into the labor-intensive process of underpinning a building with decayed wood piles.