Wellesley College -Former Henry Woods Son's Paint Factory

MT was selected as the remediation contractor for this large-scale and fast-tracked project. MT installed a turbidity control system in Lake Waban, preventing the migration of sediments, then furnished and installed a diversion system of three pumps connected to two lengths of 24" HPDE piping running along the western side of the pond. Each of the two lengths of diversion piping was 2400 LF and the 3 pumps ran at full capacity for most of the project, pumping 14-15,000 GPM.

To facilitate excavation and material handling, MT installed sheeted cofferdams with sealed joints, activated the diversion pumps, and drained the pond. MT excavated approximately 300,000 CY of soil and 75,000 CY of sediment from the site. An innovative, MT-designed clamshell bucket mounted on the long reach excavator was used to remove the contaminated soil and sludge from the sensitive wetland areas. The clamshell bucket minimized disturbance to the wetlands while maximizing the amount of sediment removed. The excavator was also equipped with a Global Positioning System (GPS) to provide precise control of dredging operations.

MT served an integral role on the project team that earned the 2004 Gold Award for Achievement of Professional Design Excellence for the remediation of this contaminated site.

Client Wellesley College Trustees Location Wellesley, MA Engineers Haley & Aldrich
Click thumbnails to see larger view		Project Elements Extensive sheet piling and cofferdams Waterway diversion system On-site consolidation area construction Dredging Excavation Dam rehabilitation Use of GPS technology Landfill construction Wetland restoration   "Your work in successfully completing the remediation of the site in a very professional, timely, cost effective manner speaks to the outstanding skill of your project team." - Barry Monahan, Wellesley College