Tag: habitat connectivity

Reconnecting the Raritan: the role of dam removal in watershed restoration

Dams are devastating to our stream systems and watersheds. They fragment our riverine habitat with cascading impacts including reservoir sedimentation, channel degradation, water quality effects, and blockage of fish migrations. Socioeconomic and cultural effects include loss of homes and livelihood, compromised access for recreation, concentration of heavy metals in the food chain, hydraulic undertows and drowning risks, and the potential for dam failure.

Dam removal takes a big picture view of River restoration, advancing an approach that prioritizes restoring the rivers’ ability to create, retain, manage, and reconnect watershed habitats, rather than man made attempts to direct flow or artificially create habitats.

It would be hard to find anyone who has advanced a clearer vision for a restored Raritan and improved watershed habitat connectivity than hydrogeologist John W. Jengo, PG, LRSP. John, a licensed Professional Geologist in several Northeastern and Southeastern states and a Licensed Site Remediation Professional in New Jersey, works as a Principal Hydrogeologist in an environmental consulting firm in southeastern Pennsylvania.

Over the last 30 years John has drawn on degrees in geology from Rutgers University (1980) and the University of Delaware (1982) to conduct the characterization and remediation of large, complex contaminated industrial sites throughout New Jersey, Pennsylvania, and Delaware. He played a key role in Natural Resource Damage (NRD) assessments that led to groundbreaking legal settlements to remove numerous low head dams on the Raritan and Millstone Rivers to restore historically significant migratory fish spawning runs. As technical project manager, he planned, permitted, and successfully managed the removal of the Calco Dam, the Robert Street Dam, and the Nevius Street Dam between 2008-2013, and the removal of the Weston Mill Dam on the Millstone River in 2017, along with leading the archaeological investigation of the former Weston Mill in the Borough of Manville and Franklin Township.

The Lower Raritan Watershed Partnership thanks John for developing a blog series that provides a history of four of the dams in the Raritan Basin, the problems they have caused, and the process of their removal. In this series of posts about the Calco, Nevius, Robert Street, and Headgates dams, John highlights his big picture view of restoration: reconnecting the Raritan River habitat.

Click on the links below to read John’s story of dams and dam removal on the Raritan Basin.

Calco Dam

Nevius Dam

Robert Street Dam

Headgates Dam

“Virtual” habitat connectivity on New Brunswick’s sidewalks

Article by Rutgers Raritan Scholar Intern Allie Oross


On Saturday, July 7th, the LRWP led the New Brunswick Environmental Commission and other members of the New Brunswick community in a project on the Redmond Street side of Lord Stirling Elementary School. The final product of their hard work is manifested in a whimsical sidewalk mural that not only serves as a form of neighborhood beautification, but also a semi-permanent reminder of the intricate roles human’s play in the environment.

New Brunswick Environmental Commissioners, residents and LRWP friends paint flowers

Funded through an Americorps alumni grant secured by Thalya Reyes, and designed by former Americorps alum Johnny Malpica, interwoven swirls paint a picture of natural necessities that are integral aspects in every single person’s day to day life. In the mural, clouds create rain drops that collect to form a pulsing river. That river then flows into a set of flowers being pollinated by a bee and a butterfly with the next section displaying a fish in the river. Though the images are depicted in a delightfully playful and abstract manner, each can also be interpreted as a representation for a much more crucial concept:

We, as a community and as a species, must never forget how inextricable we are from the environment. You cannot have one without the other, and though we may seem separated from nature, the gap is almost always smaller than we may think.

New Brunswick Environmental Commissioner Howie Swerdloff paints a river

A few blocks down from the sidewalk mural is the Raritan River. A core purpose for the mural is to act as an expression of the course stormwater runoff takes through the New Brunswick streets every time it rains. After rain events our streets often serve as veins pumping litter and pollution into the heart of our waterways. Out of sight should never mean out of mind when discussing the environment, and the mural engages citizens to remember there is nature all around us if we only make the effort to search for it.