Webinar: 2025 No-Dig Show Outstanding Paper: Rehabilitation

Join Us for Free Trenchless Education for NASTT Members!

Back by popular demand! NASTT is excited to present an encore of the 2025 No-Dig Show Outstanding Rehabilitation Paper:

Don’t Drain the Pond – Rehabilitating the City of New Bedford’s Grape Street Collector Sewer

Check out the abstract below and be sure to join us for this special presentation!

In the fall of 2018, the City of New Bedford (City) Department of Public Infrastructure (DPI) initiated a multi-sensor inspection (MSI) program of 40 miles of large diameter interceptors and collector sewers, and segmental block and brick sewers. This program included the inspection of the Grape Street Collector (GSC), comprised of approximately 12,900 linear feet (LF) of 36- to 72-inch diameter brick and vitrified clay (VC) pipe constructed in 1912. A portion of the 36-inch VC section of the GSC pipeline is located in an easement through the City’s Fredrick Law Olmsted- designed Buttonwood Park and travels directly beneath Buttonwood Brook and Pond. Adjacent neighborhoods are serviced by lateral sewers that also flow under the Brook and Pond to the GSC. Inspections of these pipelines revealed broken pipe, cracks, intruding roots and excessive infiltration and inflow (I/I) through leaking joints and manholes. One manhole on the GSC, located within the extents of the Buttonwood Park Pond, was subject to substantial inflow. To address these deficiencies, the City implemented a rehabilitation project to improve access and repair 2,000 LF of the GSC, including cured-in-place pipe (CIPP) lining, chemical root treatment, cementitious lining of manholes, adding new access manholes, and replacement of existing manhole frames and covers. This project was challenging to implement due to access constraints, complex by-pass pumping operations around the brook and pond, the need to maintain public access to park amenities throughout the project and coordinating work with existing Park projects. Work was successfully completed between March 2024 and October 2024. With the project complete, significant I/I has been removed from the City’s collection system and the sewers are fully reinforced under the pond, with improved access for maintenance of the GSC.

Date & Time: February 11, 12:00 – 1:00 PM (Eastern)
Location: Virtual webinar format
Cost: FREE for NASTT Members | Non-Member Cost is $35.00
Registration includes the presentation slides, a copy of the complete technical paper, and CEUs provided by Louisiana Tech.
Paper Authors: Jesse Herman, PE, PMP, CDM Smith; Shawn T. Syde, PE, Department of Public Infrastructure, City of New Bedford, Massachusetts; Jamie Ponte, Department of Public Infrastructure, City of New Bedford, Massachusetts; Justin Chicca, Department of Public Infrastructure, City of New Bedford, Massachusetts; and James Costa, Department of Public Infrastructure, City of New Bedford, Massachusetts

Contact:
Kari Webb
kwebb@nastt.org
888-388-2554