of the Delaware and Raritan Canal
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Sediment from road and land runoff fills up the Delaware & Raritan
Canal and decreases the flow that the Canal can pass. Periodically, the
sediment needs to be removed to restore the Canalís original capacity. The
sediment removal process is known as dredging,
Based on the review of dredging options and stakeholder input, this
project will use a small hydraulic dredge with sediment dewatering via
either Geobags or belt presses. The hydraulic
dredge sucks up a mixture of sediment and water from the channel bottom.
The amount of water sucked up is controlled to make the optimal texture,
The slurry needs to be dried prior to the sediment being hauled away for
beneficial reuse. For this project, there are two options for dewatering: Geobags and belt presses. Slurry is pumped into the Geobags and the solid and sediment materials remain in
the bag, while clean water is let out of the bag. Belt presses apply
mechanical pressure to drain water from the slurry.
For more information about dredging, visit these resources:
U.S. Army Corps of
Engineers Dredging Information
The New Jersey Water Supply Authority (NJWSA) selected Urban Dredging
Consultants, Joint Venture to do the design for dredging of the Delaware
and Raritan Canal (D&R Canal) from Route 27 in Kingston and Amwell Road in Franklin Township. The objective of the
project is to remove an estimated 240,000 cubic yards of sediment from the
Canal to restore flow capacity. The Canal serves as a source of
drinking water for millions of residents in central New Jersey and provides
recreational opportunities for its numerous visitors. The dredging design
will address the water supply needs for the area and take into account the
surrounding cultural and natural resources.
The project includes sediment sampling and characterization, identifying
staging areas, dredging and dewatering activities, sediment disposal
options, and the preparation of an Environmental Information Document
(EID). Evaluation of dredging methodologies began in December 2010.
Design work is expected to be completed by July 2013 and funding in place
by late 2013. Three construction periods are anticipated, which are
scheduled to commence in early 2014.
NJWSA is leading a public outreach effort to provide information
regarding the project to interested stakeholders as well as identify local
concerns. Initial meetings with officials from Somerset County,
Millstone, South Brunswick, Montgomery, Hillsborough, Rocky Hill, and
Franklin were completed in July 2010. Public meetings with stakeholders
including area residents, businesses, civic groups, and recreational users
were held. In addition, a public hearing took place to review the findings
of the EID. Project details and updates will be provided as the
If you need to contact us or you would like to be included on the
stakeholders list, please e-mail firstname.lastname@example.org
subject: D&R Canal.