H.B. Fleming has installed underwater intake and outlet lines for a number of customers. Our ability to perform much of the ancillary work in addition to the piping work makes us uniquely suited to these projects. We can design and install any cofferdams needed; we can perform long-reach excavation and backfilling with our cranes; and we can design and construct work platforms and access trestles for our equipment, as well as other subcontractors’.

Projects Including Subaqueous Pipelines

Kennebec River Water Intake

Owner: Maine Water Company Partner: Sargent Corporation Type: Access Platform/Trestle, Subaqueous Pipeline Location: Skowhegan, Maine Project Description: H.B. Fleming installed a 260-foot long trestle to accommodate a 110-ton crane and excavators, excavated a trench for the new water intake line, and fused and sunk a new 12″ HDPT pipe with intake screen.  Challenge: Install a…


Nagog Pond Intake Replacement

Owner: Town of Concord Partner: D&C Construction Type: Access Platform/Trestle, Subaqueous Pipeline Location: Acton, Massachusetts Project Description: For this project, H.B. Fleming fused and installed 1,100 linear feet of 20″ pipe, connected new pipe to the existing pipeline, and designed and fabricated a pile-supported frame to support the intake.  Challenge: Install a new drinking-water intake…


Merrimack River Water Intake Structure

Owner: Pennichuck Water Service Corporation Partner: Kingsbury Companies Type: Infrastructure Support Location: Merrimack, New Hampshire Project Description: For this project, H.B. Fleming installed three cofferdams on land for junction structure, as well as interconnected piping and a wet well. In the water we installed a trestle for crane access to the river and a 200-foot-long…