HomeMy WebLinkAbout20250566 33-35 Caroline St Site Plan Dewatering Letter - 35 Caroline Dempsey Construction & Development
54 Minot St, Boston, MA 02122
June 29, 2026
To Whom It May Concern:
Regarding groundwater and the dewatering plan, we do not believe we will encounter water until
12.5’ below grade on Caroline Street. Two prior excavations support this. On May 29, 2025, we
dug to approximately 10’ below grade for utility shutoffs in the sidewalks on both Caroline Street
and Pavilion Place and did not find any water. Additionally, on June 19, 2026 multiple test holes
were dug throughout the site, and we did not hit any water until 12’ 6” below the grade on
Caroline Street. The most recent excavation was conducted after nearly 1.5” of rainfall on June
18, 2026 and over 2” of rain on June 15, 2026. We do not anticipate groundwater to be a major
issue and plan to contain all the water using a localized dewatering system. Local sumps will be
dug in the excavated hole, and water will be redirected to them via drainage trenches and/or
sump pump. Below are images from both excavations.
Sincerely,
Cronan Dempsey
CONSTRUCTION & DEVELOPMENT
Utility Excavation 05/29/2025:
- No water was found at a depth of 10’ below grade on Caroline Street nor 10’ below the
sidewalk on Pavilion Pl; roughly 12’ below the Caroline St grade factoring in the slope of
Pavilion
- The water in the picture is from the water pipes after they were cut and is not
groundwater.
CONSTRUCTION & DEVELOPMENT
Utility Excavation 05/29/2025 (cont.):
Exploratory Excavation 06/19/2026:
CONSTRUCTION & DEVELOPMENT
- The laser was set with the sidewalk height on Caroline Street and water was not
encountered until 12’ 6” as depicted above