- Construction Date: Jan 2019 to March 2019
- Location: Leominster, MA
- Category: Dam Rehabilitation
In the Winter 2018 NSI assisted with the rehabilitation of a leaking 150 year old rock infill storage dam in Leominster. The contract involved installing 300’ feet of 25’ vinyl sheet pile as a cutoff wall. The installation of vinyl sheets dictated some changes in handling and driving using a custom mandrel to hold the plastic sheets stiff. While this method was unusual and difficult in the rocky soils of Leominster, NSI performed the installation to the satisfaction of the design engineer. The construction was completed under approval of the Mass Division of Dam Safety.