We’re committed to improving our ecosystems, quality of life, and communities for the better.
Our passion and commitment to the integration of innovative science and engineering drive us to exceed on behalf of every client.
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The Princeton Hydro team is thrilled to kick-off 2025 with a multitude of events. We're proud to be sponsoring and participating in conferences, webinars, community gatherings, and symposiums. Our blog is the go-to hub for all the event dates, detailed information, and ways to get involved. Join us in making this winter season one to remember!
The 2025 Delaware Estuary Science & Environmental Summit, held at the Chase Center on the Riverfront in Wilmington, DE, is themed "Bridging the Gap Between Science, Policy, and Action." The goal of this biennial Summit is to bring together scientists, managers, restoration practitioners, and educators from different sectors to share the latest scientific information, network, and make ecological linkages that promote a better understanding of the watershed as a whole. Participants can take part in a variety of education sessions on three different tracks: Living Resources, Sediment Material Management, and Climate Change. The program includes 70+ presentations on topics including Monitoring PFAS in the Delaware River; Sea Level Rise Scenario Visualization for Adaptation and Mitigation Practices; and Implementing Climate Resilience through Community Building. Princeton Hydro is exhibiting at the conference. We hope you'll stop by!
The 32nd FEMA National Dam Safety Program Technical Seminar (NDSPTS) will take place at the National Disaster & Emergency Management University in Emmitsburg, Maryland. This annual event brings together over 300 dam safety professionals to explore emerging challenges, advancements, and collaborative strategies essential for maintaining our nation’s dam infrastructure. This year's NDSPTS introduces a dynamic new format, designed to enhance learning and collaboration among dam safety professionals, that blends training, workshops, and traditional presentations, offering a comprehensive approach to addressing dam safety challenges and innovations. Princeton Hydro President Geoffrey M. Goll, PE, is presenting on "Streamlining the NEPA Process and Focusing on Adaptive Management for Dam Removal," offering insights into improving project efficiency and resilience.
Get more info and register.
Pennsylvania Lake Management Society (PALMS) is hosting its 35th Annual Conference at the Wyndham Garden in State College, PA. Participants will experience a collection of professional presentations, workshops and panel discussions focused on the latest discoveries in and approaches to invasive species, monitoring, best management practices, pollutants and harmful algal blooms. A proud sponsor, Princeton Hydro is exhibiting at the conference, and Senior Technical Director of Ecological Services Dr. Fred Lubnow is participating in an expert panel discussion and Q&A session as well as leading a presentation on "An Additional Strategy that Should be Considered in the Monitoring and Management of Lakes and Reservoirs."
Presented by the Delaware Riverkeeper Network, the 2025 Watershed Congress is taking place at Alvernia University in Reading, PA. The Watershed Congress has evolved since 1998 to advance the best available information and techniques for protecting and restoring watersheds. The focus on networking across disciplines means that the Watershed Congress melds science, policy, and practical applications into one program. As a result, the annual Watershed Congress is a highly anticipated event for people interested in understanding, protecting, and restoring their local streams.
If you missed our Facebook Live AMA presentation, “Fright or Fiction: Debunking the Myths about Bats, Spiders & Snakes,” don’t worry — the recording is now available for on-demand viewing! This fascinating session featuring Michael McGraw, CSE, QAWB, ACE, Senior Project Manager and Wildlife Biologist at Princeton Hydro sheds light on the common myths surrounding these creatures, the roots of our fears, and the incredible ecological benefits they provide. Plus, he offers insights on how we can help protect them instead of fearing them. By learning more about these creatures, we can contribute to a healthier, more balanced ecosystem — and who knows, we might even overcome a fear or two along the way!
Princeton Hydro President and Founding Principal Geoffrey M. Goll, P.E., lent his expertise to a “Daylighting Streams: Design & Engineering” webinar hosted by The Watershed Institute. The event delved into uncovering and restoring buried watercourses, featuring insights from Geoffrey and other leading experts, including Vince Sortman, Senior Fluvial Geomorphologist at Biohabitats, and Warren T. Byrd, Jr., FASLA, Founding Partner of Nelson Byrd Woltz Landscape Architects. Topics covered included hazard mitigation, maintenance, and the role of community involvement in successful daylighting projects. Highlighting the dual benefits of enhancing urban infrastructure and natural ecosystems, the webinar offered valuable strategies for tackling these complex projects. If you missed the session, visit our blog for a comprehensive recap and to learn more about Daylighting Streams.
The Audubon Christmas Bird Count (CBC) is the nation’s longest-running community science bird project, fueling critical conservation efforts for over 12 decades. Each year, from December 14 to January 5, birders and nature enthusiasts participate in this hemispheric program, contributing valuable data about bird populations.
The CBC began in 1900 as a new holiday tradition proposed by U.S. ornithologist Frank Chapman, replacing the "side hunt" — a practice of hunting birds with no limit — with a more constructive and conservation-minded activity: counting birds to support science and protection efforts. That year, 27 observers counted 18,500 birds in 25 locations across the U.S. and Canada. Since then, the CBC has grown to include over 2,800 count circles across the Western Hemisphere, involving thousands of volunteers who tally birds within a designated 7.5 to 15-mile radius.
This data forms one of only two large pools of information that ornithologists and conservation biologists rely on to track bird population trends. For example, a 2019 study revealed a loss of nearly three billion North American birds since 1970. The data also informs how birds respond to climate change, guiding conservation efforts in an ever-changing environment.
The Audubon Christmas Bird Count is more than a science initiative; it’s a cherished tradition that brings communities together in support of bird conservation. Members of the Princeton Hydro team have embraced this opportunity to contribute valuable data while fostering a deeper connection with local ecosystems and creating a meaningful impact for birds and their habitats.
Princeton Hydro Vice President Mark Gallagher, an avid birder who has observed approximately 800 bird species in his lifetime, has been involved in the CBC since 1978 bringing both expertise and enthusiasm to the effort. He leads the Southern Bucks County (PA) Bird Count group, organizing and participating in the annual count event as well as coordinating with sub-area managers to compile and submit CBC data to the National Audubon Society.
The Southern Bucks County circle covers the Neshaminy Creek and Upper Delaware River, Philadelphia, Pennsylvania site, which was one of the original 25 locations surveyed during the first Christmas Bird Count in 1900. This long-standing tradition adds a unique historical significance to the data collected in this region and provides fascinating insights into long-term trends in bird populations.
This year, a Princeton Hydro team also participated in the Trenton Marshes Annual Christmas Bird Count, covering areas around Duck Island and the Delaware River. The group of six, spotted 50 species, including Orange-crowned Warbler, Fox Sparrow, Black-capped Chickadee, Rusty Blackbird, and several Bald Eagles.
One highlight of the day was observing a flock of Ruby-crowned and Golden-crowned Kinglets dancing and singing in an evergreen patch near the Trenton Sewage Utility Plant. The group also had an unforgettable experience when they imitated the descending, quavering whistle of an Eastern Screech Owl and received an answering call from the trees above—a thrilling moment that underscored the magic of connecting with wildlife.
The CBC offers an opportunity for everyone, regardless of age or experience, to contribute to this vital community science initiative. Birders must arrange participation with a local compiler and can choose to count in the field or from the comfort of their home by watching feeders. To see which count circles are nearest to you, visit Audubon’s CBC map.
In a press release, Dr. Brooke Bateman, senior director of climate and community science for Audubon, said: “The Audubon Christmas Bird Count is a great tradition and opportunity for everyone to be a part of more than 12 decades of community science in the name of protecting birds. Your Christmas Bird Count observations help scientists discover trends about bird species that inform conservation.”
In addition to the Christmas Bird Count, the National Audubon Society, Cornell Lab of Ornithology and Birds Canada host the Great Backyard Bird Count, which takes place February 14 - 17. This count is an accessible way to contribute to bird conservation by observing birds from any location for as little as 15 minutes.
To access CBC count results, review 100 years of data, and receive information about all of Audubon’s community science programs, click here.
Princeton Hydro is proud to contribute to the Audubon Christmas Bird Count and similar initiatives that combine passion for conservation with meaningful action. By participating in these community science programs, we not only support vital research but also foster connections with the ecosystems we strive to protect. Whether through bird counts, habitat restoration projects, or innovative environmental solutions, we remain committed to making a positive impact for birds, wildlife, and the natural world. Together, efforts like these ensure a brighter, more sustainable future for generations to come.
As 2024 comes to a close, we’re proud to reflect on a year filled with meaningful achievements and memorable milestones. From groundbreaking projects to personal accomplishments, these successes highlight the dedication and innovation of our team and the strength of our partnerships. None of this would have been possible without the unwavering support of our clients, collaborators, and staff.
This year marked major milestones in the restoration of three Delaware River tributaries. The removal of the 129-year-old Paulina Lake Dam on the Paulins Kill River reconnected an additional 7.6 miles of river habitat, adding to the 10 miles restored following the removal of Columbia Lake Dam. This project, led by The Nature Conservancy and designed by Princeton Hydro, represents a significant step forward in revitalizing New Jersey’s third-largest tributary to the Delaware River. The removal of Dam #2 on Bushkill Creek completed a five-dam removal effort, making the lower Bushkill Creek free-flowing and reconnecting it to the Delaware River for the first time in over 200 years. This effort enhances water quality, supports the passage of migratory fish, and bolsters freshwater mussel populations, vital to the health of the watershed. In November, work began to remove the Cedar Grove Dam, the first of four dams slated for removal along the Pequest River over the next year. This collaborative effort, led by The Nature Conservancy with training support from Princeton Hydro, will open nearly 10 miles of mainstem river and reconnect 57 miles of tributaries. Collectively, these dam removals celebrate a shared commitment to restoring ecological balance, reconnecting critical habitats, and supporting the biodiversity of the Delaware River Basin.
Through engineering and ecological enhancements, we are revitalizing landscapes across the region. In New Jersey, the 279-acre Miry Run Dam Site 21 in Mercer County Park is being transformed into a vibrant public park that balances nature and community. We also collaborated with the Trenton South Ward Neighborhood Association on a Community Garden and Park Visioning project, assisting them in securing a grant that led to the planting of 500 native plants, enhancing public spaces and creating critical habitat for monarch butterflies. In Pennsylvania, Warrington Township’s Lion’s Pride Park is being converted into a resilient wetland complex with accessible pathways, demonstrating how ecological uplift fosters healthier communities. And, construction is now complete on the Turkey Foot restoration project within the John Heinz National Wildlife Refuge at Tinicum in Philadelphia. The project revitalized 7.5 acres of critical wetland and upland habitats, preserving Pennsylvania’s last freshwater tidal marsh and supporting migratory and threatened and endangered species. In New York, we broke ground on the Spring Creek (North) Ecosystem Restoration Project in Brooklyn and Queens, which aims to restore 43 acres of degraded habitat within Jamaica Bay into a mosaic of low marsh, high marsh, scrub shrub wetland, and maritime upland within a 67-acre footprint. Meanwhile, the addition of the Marsh Master® 2MX-KC-FH to Princeton Hydro’s fleet elevated the ability to combat invasive species like Phragmites australis with minimal ecological disturbance.
Princeton Hydro was recognized as one of New Jersey’s “Top Workplaces of 2024,” a prestigious honor that highlights our commitment to fostering an inspiring and supportive work environment. Two of our project achievements received acclaim: the Musconetcong Island Park project earned both the New Jersey Future Smart Growth Award and the American Planning Association of New Jersey’s 2024 Great Places in New Jersey - Great Public Space Award for transforming an abandoned site into a riparian park. The City of Lambertville’s stormwater management initiatives received the NJDEP “Our Water’s Worth It” Award for advancing flood resilience and water quality. Additionally, the restoration of the historic Roebling Wireworks, home to our Trenton headquarters, earned the New Jersey Historic Preservation Project Award, and our President, Geoffrey Goll, PE, was honored with the “Catalyst for Sustainable Change” Award from Hold High the Torch for advancing STEAM education and environmental stewardship. And just this month, Dr. Fred Lubnow was honored with the NJ-AWRA Peter Homack Award for his outstanding contributions to the multi-disciplinary understanding and management of New Jersey’s water resources. These awards reflect the passion, innovation, and commitment to excellence that define Princeton Hydro.
We partnered with The Nature Conservancy to enhance accessibility and visitor experience at the South Cape May Meadows Preserve, a 200-acre haven of biodiversity that welcomes 90,000 visitors annually. The centerpiece of this collaboration is a new 2,675-foot elevated boardwalk and 480-square-foot viewing platform, designed to open access to previously unreachable areas and go beyond ADA standards to ensure visitors of all abilities can explore the preserve’s diverse landscape. Situated largely within freshwater wetlands, the project required innovative solutions to minimize impact on sensitive habitats. This effort highlights the importance of creating inclusive spaces that both protect and celebrate our natural world.
One of Princeton Hydro’s core offerings is grant writing for our nonprofit and government clients. This year alone, we landed nearly $1 million in grants for our clients for harmful algal bloom monitoring, habitat enhancement, water quality improvements, and planting native plants via the National Fish and Wildlife Foundation's Delaware Watershed Conservation Fund and the Xerces Mid-Atlantic Pollinator Habitat Kit Planting Program.
This year, our talented team reached numerous applaud-worthy milestones, showcasing their dedication to advancing environmental science and sustainability. Amy McNamara became a Certified Professional in Erosion and Sediment Control (CPESC), highlighting her expertise in sustainable site design and regulatory compliance. Marissa Ciocco earned a Professional Engineer (PE) license in Connecticut, building on her existing licensure in Delaware. Chris Mikolajczyk CLM was appointed President-Elect of the Colorado Lake and Reservoir Management Association Board. Jesse Smith organized and implemented Flemington’s first-ever BioBlitz, a community-focused event that fostered a deeper connection to local biodiversity. Erin Bennett became a Notary Public in New Jersey and earned her Green Infrastructure Champions certification. Thomas Hopper achieved the Geographic Information Systems Professional (GISP®) certification, further elevating his contributions to geospatial analysis and restoration efforts. And, Matt Kreines earned his FAA Commercial Drone Pilot license.
We completed our first project in Colorado—a bathymetric assessment of the Fairplay Beach Reservoir, focused on mapping the reservoir’s underwater landscape to support ongoing conservation efforts. We are excited to bring our expertise in water resource management to new regions like Colorado and look forward to future opportunities to contribute to the preservation and enhancement of Colorado’s unique high-altitude aquatic environments. Stay tuned for more updates as we continue to explore new waters and chart new territories.
We made significant strides in advancing lake and watershed health through innovative initiatives. At Virginia’s Smith Mountain Lake, decades of historical data and cutting-edge research were leveraged to identify the drivers of harmful algal blooms and shape sustainable solutions. In New Jersey, a collaboration with the Mercer County Park Commission resulted in comprehensive lake and watershed management plans to address algal blooms and bolster ecological resilience across the park’s aquatic ecosystems. These projects highlight our unwavering commitment to protecting vital freshwater resources and fostering healthier ecosystems for future generations.
This year we welcomed Senior Wildlife Biologist Michael McGraw, CSE, QAWB, ACE, who joined our Regulatory Compliance & Wildlife Surveys team, bringing over 20 years of expertise in ecological assessments and wildlife surveys. Alexandra Garnett became a vital part of our Trenton office as an Administrative Assistant. Civil Engineer Ryan Krueger, PE, joined our Engineering Services team this month, and Eric Libis returned to our team as an Aquatics Specialist over the summer/fall. Kaitlyn Jones, who began as an intern, has now joined our Aquatics team permanently as a Staff Scientist! This summer, we also hosted four interns: Francisco Batz (Landscape Architecture), Jade Gallagher (Communications), Daniel Goll (Engineering), and Rachel Trokenheim (Aquatics).
We connected with industry professionals, communities, and stakeholders through a wide array of events, fostering collaboration, sustainability, and stewardship. In partnership with The Watershed Institute, we delivered impactful workshops, including the inaugural “Watershed Restoration Academy: Healthy Streams 101;” webinar sessions on daylighting streams and the conservation of American shad; and two education sessions at the 7th Annual Watershed Institute Conference. President Geoffrey Goll, PE traveled globally to participate in important river restoration and dam removal conversations, including the “Free Flow 2024 Conference” in The Netherlands, a river connectivity workshop in South Africa, and collaborations with Associação Natureza Portugal, a Portuguese non-profit NGO that works in association with World Wide Fund for Nature in Portugal. We also sponsored and presented at nationally prominent events, including the “NALMS International Symposium” in Lake Tahoe, CA; the “NYSFOLA Conference” in Lake George, NY; the “Harmful Algal Bloom Summit” in Portland, ME; and the “Delaware River Watershed Forum” in Bethlehem, PA, covering topics such as climate change impacts on lake ecology and green infrastructure stormwater management. Locally, we celebrated community and stewardship through events like the “Trenton River Days Fair,” Mercer County’s “Juneteenth Celebration,” and the New Jersey Highlands Council’s 20th anniversary, which highlighted collaborative Lake Hopatcong project successes. We also led two Facebook Live events: “Understanding and Managing Invasive Species in Your Backyard” and “Debunking Myths About Bats, Spiders & Snakes.” Through these efforts we deepened relationships with partners, advanced critical conversations, and inspired meaningful, sustainable change. These are just a few highlights from a truly impactful year!
As we reflect on this year’s achievements, we are deeply grateful for the trust, collaboration, and support of our clients, partners, and community. Your belief in our mission fuels our ability to innovate, restore, and protect. Here’s to building on this momentum in 2025 and continuing to make a positive impact together.
When we made the decision to move Princeton Hydro’s headquarters to Trenton in April of 2022, we knew we were becoming part of something special. It wasn’t just about finding a new office—it was about joining a community with a rich history, vibrant culture, and a shared dedication to environmental and social progress. From the very beginning, we felt a sense of belonging and purpose here. Trenton isn’t just where we work; it’s where we’ve had the chance to grow, learn, and give back to a place that inspires us every day.
From its founding by Dr. Fred Lubnow, original and former President, Dr. Stephen J. Souza (retired), and us, our firm has always been guided by a philosophy of stewardship, sustainability, and community partnership. While our core work focuses on ecological and engineering consulting, we firmly believe that our responsibility extends beyond the projects we undertake, focusing on fostering genuine partnerships and creating lasting impacts in the communities we serve. In Trenton, we've been especially fortunate to experience the powerful connection that comes from working alongside local organizations and residents.
Since relocating our headquarters to Trenton, we’ve been honored to open our doors and our hearts to a wide range of local organizations and causes. By hosting events for nonprofit groups like Greater Trenton, Outdoor Equity Alliance, NJ Society of Women Environmental Professionals, Boys and Girls Club of Mercer County, Revolutionary Trenton, Princeton-Mercer Regional Chamber, and many others, we’ve had the privilege of supporting efforts that protect both the environment and the cultural heritage of Trenton. These events are more than gatherings; they are moments that strengthen community bonds and foster a sense of connection that is vital to the city’s growth and vibrancy.
In that spirit, we are proud to contribute to local causes that directly uplift Trenton’s residents. Whether organizing coat drives for the Children’s Home Society of NJ, running food drives for Arm & Arm, or sponsoring local events like Juneteenth, the Black Farmers Market, Jersey Fresh Jam, and the Summer Splash Bash, we are constantly inspired by the resilience and commitment of the people in this city. These initiatives allow us to give back to a community that has given us so much, while also fostering environmental awareness and celebrating the rich cultural and communal life that makes Trenton so special.
Our focus on STEAM (Science, Technology, Engineering, Arts, and Math) education is another way we aim to make a lasting impact. We are honored to support programs like the Hold High the Torch’s Eco Innovators for Youth STEAM Leaders, the Outdoor Equity Alliance’s Careers in Conservation, and the NJ Department of Environmental Protection’s Youth Inclusion Initiative, which are essential for nurturing the next generation of environmental leaders. By helping students engage with real-world environmental challenges, we hope to inspire future conservationists and scientists who will carry forward the work we’ve begun.
In addition to our community outreach, we have been directly involved in significant environmental projects throughout Trenton. Our partnership with Trenton Water Works on the water quality sampling at Pennington Reservoir has been crucial in ensuring safe and reliable water for the city. We collaborated with the Trenton South Ward Neighborhood Association on a Community Garden and Park Visioning project, assisting them in securing a grant that resulted in the planting of 500 native plants, enhancing public spaces and creating a habitat for monarch butterflies. One of our most impactful efforts has been the Abbott Marshlands wetland restoration project at John A. Roebling Park, in collaboration with the Mercer County Park Commission, to eradicate invasive species and bring back the native landscape for park goers to enjoy. These projects demonstrate our commitment to restoring greater Trenton’s natural habitats, creating a sustainable future for its ecosystems, and leaving a positive, tangible mark on the city’s landscape.
As we reflect on our work in the Trenton region, we are truly humbled by the recognition we’ve received. In 2023, Princeton Hydro was honored with the New Good Neighbor Award by the NJBIA, a testament to our commitment to being more than just a business operating in Trenton, but a dedicated partner in its success. Additionally, our office itself was recognized with a Historic Preservation Award from Preservation New Jersey, underscoring the importance we place on respecting and preserving the rich history of the City while looking toward the future.
At Princeton Hydro, we are committed to being not just a business in Trenton, but a dedicated partner in its success. We take pride in the contributions we’ve made thus far, yet we recognize that our journey is far from complete. With the community's support and collaboration, we believe we can continue to make a meaningful, lasting impact as we work together toward a sustainable future – one that enriches our environment and enhances the quality of life for everyone.
We are thrilled to announce that Dr. Fred Lubnow, Senior Technical Director of Ecological Services at Princeton Hydro, has been honored with the prestigious Peter Homack Award by the American Water Resources Association, New Jersey Section (NJ-AWRA). The award was presented during NJ-AWRA’s annual meeting in December, recognizing Fred’s outstanding contributions to the multi-disciplinary understanding and management of New Jersey’s water resources.
The Peter Homack Award, established in 1987, commemorates the late Peter Homack, a former NJ-AWRA president and distinguished New Jersey engineer. The award celebrates individuals who exemplify Homack’s legacy of advancing water resource management through collaboration and innovation.
Fred’s selection for this honor is a testament to his decades-long dedication to the restoration and protection of water resources. Since Princeton Hydro’s founding in 1998, Fred has played a pivotal role in the study and restoration of hundreds of lakes across New Jersey and the Mid-Atlantic region. His work at Lake Hopatcong, in particular, stands as a shining example of his commitment. For over 30 years, Fred has partnered with Lake Hopatcong stakeholders to implement comprehensive restoration plans, develop best management practices, and achieve milestones toward the lake’s water quality goals.
Beyond his work at Princeton Hydro, Fred has enriched the field of water resource management through education and stewardship. He teaches watershed management at Delaware Valley University and freshwater ecology at Villanova University, inspiring the next generation of environmental stewards. Fred has contributed to NJ-ARWA over the last five years through a variety of presentations on harmful algal blooms (HABs) and watershed planning. Additionally, he has held leadership roles in the North American Lake Management Society (NALMS) and the Pennsylvania Lake Management Society. Selected as a member of the New Jersey Department of Environmental Protection’s HAB Expert Team, Fred has been instrumental in shaping the HAB advisory and alert systems we rely on today. His contributions have advanced our understanding of the factors driving cyanobacterial blooms in New Jersey’s lakes, offering valuable insights to improve the prediction, prevention, and management of these blooms.
Although Fred could not attend the award ceremony in person, he joined virtually via Zoom as his colleague Michael Hartshorne, Princeton Hydro’s Director of Aquatics, accepted the award on his behalf. During Michael's acceptance speech, he said:
“I’ve worked with Fred since I started at Princeton Hydro in 2006. He’s a humble leader, a dedicated mentor, and an overall fantastic person. Fred’s enthusiasm for lake ecology, particularly algae, is truly infectious. It’s a rare skill to make others genuinely excited about such a niche topic, but Fred has a remarkable way of doing just that. Fred truly embodies the spirit of the Peter Homack Award, and it’s an honor to receive this on his behalf.”
Fred’s passion, expertise, and collaborative spirit have left an indelible mark on water resource management in New Jersey and beyond. Princeton Hydro congratulates him on this well-deserved recognition and looks forward to his continued contributions to the field.
Did you know that some of the animals we fear the most are actually among nature’s most invaluable helpers? Bats, spiders, and snakes are often misunderstood, leading to fear and, sadly, even harm to these essential species. These misunderstood creatures might send shivers down your spine, but without them, our ecosystems would be in serious trouble!
If you missed our recent Facebook Live AMA presentation, "Fright or Fiction: Debunking the Myths about Bats, Spiders & Snakes," don’t worry — the recording is now available for on-demand viewing! This fascinating session featuring Michael McGraw, CSE, QAWB, ACE, Senior Project Manager and Wildlife Biologist at Princeton Hydro sheds light on the common myths surrounding these creatures, the roots of our fears, and the incredible ecological benefits they provide. Plus, he offers insights on how we can help protect them instead of fearing them.
Our fear of bats, spiders, and snakes often stems from cultural myths, sensationalized media portrayals, and fear of the unknown. Misunderstanding these species highlights how a lack of education can shape our perceptions. With knowledge and curiosity, we can move beyond fear, find beauty in their unique roles, and appreciate the essential contributions they make to our world. For instance:
By addressing the roots of these fears, such as unfamiliar behaviors or misunderstood survival tactics, Princeton Hydro's webinar aims to replace myths with facts.
Bats, spiders, and snakes are ecological powerhouses! Snakes control rodent populations, reducing disease and property damage. Spiders eat disease-carrying insects, helping to maintain healthy ecosystems. Bats pollinate crops, disperse seeds, and consume agricultural pests, supporting food security and biodiversity.
The webinar also discusses practical ways to coexist with and support these animals, including:
Are you ready to see these misunderstood creatures in a new light? Click below to watch the full webinar on-demand to gain eye-opening insights into their behaviors, benefits, and how we can better coexist with them.
Embracing knowledge over fear not only empowers us to protect these vital species but also opens the door to seeing the beauty and purpose in the creatures we once misunderstood. We also encourage you to share this blog and the webinar with your community. Together, we can help protect our natural environments for future generations.
In urban areas, streams have often been buried beneath streets, buildings, and infrastructure, cutting them off from the natural ecosystem. However, a growing movement towards "daylighting" streams—uncovering and restoring these buried watercourses—has proven to be an innovative solution for improving water quality, reducing flood risks, restoring fish passage, and creating healthier habitats. Princeton Hydro has been at the forefront of these efforts, bringing expertise in ecological restoration and water resource management to daylighting projects across New Jersey.
Daylighting is the process of removing obstructions and impervious surfaces from a buried stream or river, restoring it to a more natural state. Often, streams were diverted underground to make way for urban development. Daylighting involves reversing this process, bringing the water flow back above ground where it can interact with the natural environment. The result is a newly visible, revitalized waterway that reconnects the stream to its surrounding ecosystem. This process not only improves stormwater management but also enhances urban spaces and promotes healthier habitats.
Daylighting streams offers numerous advantages to both the environment and local communities. Some key benefits include:
Princeton Hydro has successfully completed numerous daylighting projects that demonstrate the transformative power of restoring natural waterways. By leveraging innovative engineering and ecological practices, these projects restored the natural flow of waterways and enhanced the surrounding landscape. Let’s take a closer look at two examples:
In the heart of Trenton, NJ, Princeton Hydro undertook a comprehensive stream restoration. The City of Trenton, as part of a larger urban revitalization and brownfield redevelopment project, sought to restore the stream, Petty’s Run, which had long suffered from typical urban afflictions: pollution, flooding, and heavy debris accumulation.
Princeton Hydro developed a green infrastructure design that addressed these challenges holistically. The design included removing from the stream channel heavy debris, contaminated soils, and the concrete remains of previous development. The team also replaced the restrictive upstream road crossing with a pedestrian bridge, enhancing both the stream’s flow and the community’s connectivity. A significant aspect of the project involved daylighting the 250-foot underground portion of Petty’s Run, restoring it to a natural, open flow while creating an adjacent floodplain meadow to manage stormwater and provide habitat.
The project improved stormwater management, enhanced the landscape’s biodiversity, added habitat value, and established a new public green space with walking trails, which now serves as both an ecological asset and a recreational area for the community. This project earned both the Phoenix Award for Brownfield Redevelopment and the Bowman’s Hill Land Ethics Award.
Thompson Park, a sprawling 675-acre recreational area in Middlesex County, NJ, boasts a variety of amenities, including hiking trails, ballfields, and a zoo that is home to over 50 geese and fowl, goats, and approximately 90 deer. The streams within the park faced challenges, particularly in the areas surrounding the zoo’s enclosures, including erosion and compromised water quality.
In order to increase channel stability, decrease erosion, improve water quality and ecological function, and reduce the pollutants originating from the zoo, a stormwater management treatment train was designed and constructed.
Middlesex County Office of Parks and Recreation and Office of Planning, New Jersey Department of Environmental Protection, South Jersey Resource Conservation and Development Council, Middlesex County Mosquito Extermination Commission, Freehold Soil Conservation District, Rutgers Cooperative Extension, Enviroscapes and Princeton Hydro worked together to fund, design, permit, and construct numerous stormwater management measures within Thompson Park.
One of the key project initiatives involved daylighting a section of a 24-inch reinforced concrete pipe (RCP) that had previously conveyed stormwater underground. Daylighting the stream, widen the stream channel, improved stormwater absorption, reduced erosion, helped restore the stream’s natural gradient, and improved aquatic habitat.
This multi-faceted restoration project improved stream function and created a more sustainable environment for both zoo inhabitants, the park’s visitors, and the watershed.
Princeton Hydro’s President and Founding Principal, Geoffrey M. Goll, PE, recently shared his expertise in stream restoration during a "Daylighting Streams: Design & Engineering" webinar hosted by The Watershed Institute. The webinar explored the process of uncovering and restoring buried watercourses. Moderated by Susan Bristol, The Watershed Institute Municipal Policy Specialist, the webinar featured experts Vince Sortman, Biohabitats Senior Fluvial Geomorphologist; Warren T. Byrd, Jr., FASLA, Founding Partner of Nelson Byrd Woltz Landscape Architects & Professor Emeritus, University of Virginia; and Geoffrey. The webinar provided valuable insights into the challenges and benefits of these projects, highlighting the importance of hazard mitigation, maintenance, and community involvement in successful daylighting initiatives. The event underscored the significance of daylighting in enhancing both urban infrastructure and natural ecosystems.
Daylighting streams is a forward-thinking approach to urban water management that brings immense benefits to the environment and local communities. As daylighting continues to gain recognition as an essential tool for watershed restoration, Princeton Hydro remains a trusted leader in the field, combining innovative design with environmental stewardship.
We’re thrilled to announce that Princeton Hydro’s Senior Project Manager of Aquatics and Certified Lake Manager, Chris L. Mikolajczyk, has been appointed as President-Elect of the Colorado Lake and Reservoir Management Association’s (CLRMA) 2025 Board of Directors. This appointment highlights Chris’s dedication to lake management and his commitment to advancing aquatic resource conservation efforts.
CLRMA, which was founded in 1996, brings together citizens, scientists, and professionals with a shared passion for protecting Colorado’s lakes and reservoirs. The annual CLRMA board election took place on October 22, 2024 during the organization’s fall conference. This event, a cornerstone for water resource professionals and conservation advocates throughout Colorado, fosters connections and knowledge-sharing on aquatic ecosystem health, water quality, and the legal and financial aspects of lake management.
Chris will serve as President-Elect for a one-year term, after which he will become President. In this role, Chris will work closely with CLRMA members to plan and host educational events, including spring and fall conferences, and summer gatherings, such as lake appreciation days and family-friendly workshops. With his extensive experience in lake management, as well as a term as the President of the North American Lake Management Society (NALMS), Chris is well-prepared to contribute to CLRMA’s mission of protecting and enhancing Colorado’s lakes and reservoirs.
“It’s an honor to join the CLRMA board and have the opportunity to contribute to the sustainability of Colorado’s valuable water resources,” said Chris. “I look forward to collaborating with the CLRMA team to advance our shared mission of fostering resilient, healthy lakes and reservoirs.”
Chris joined Princeton Hydro in 1999 and has spent the past 25 years managing and restoring lakes and aquatic ecosystems. Over his career, he has led numerous lake management and water quality projects across the U.S. and has played an active role in professional organizations such as NALMS. Chris’s experience includes lake diagnostics, watershed management planning, stormwater quality modeling, and leading various aquatic restoration initiatives. He brings a wealth of knowledge to CLRMA and is excited to expand his involvement in Colorado’s lake conservation community.
Alongside Chris, the newly elected 2025 CLRMA Board members include:
Additional CLRMA Board members who will continue their roles include Suresh Niraula (Past President), Meghan Chantler (Secretary), Claire Farmer (Director), and James Eklund (West Slope Director).
Together, the CLRMA board provides a forum for sharing expertise and solutions on issues facing Colorado’s lakes, from water quality and ecosystem resilience to watershed protection.
Princeton Hydro is proud to support Chris in his work with CLRMA as we continue our mission of delivering sustainable, science-based solutions for water resource management and lake restoration across the country. This mission has recently extended to Colorado, where we completed our first project—a bathymetric assessment of Fairplay Beach Reservoir in partnership with the Town of Fairplay. This project involved mapping the reservoir’s underwater landscape to support its conservation, adding critical data for future restoration and management efforts in this beautiful high-altitude ecosystem.
As we look ahead, Princeton Hydro is excited to bring our expertise to Colorado’s unique aquatic environments and partner with local communities and conservation organizations to protect the state’s natural resources. Stay tuned for more updates as we continue exploring new waters and contributing to sustainable resource management across the region.
For more information about CLRMA and its work in protecting Colorado’s lakes and reservoirs, visit their website here.
Lake Hopatcong, New Jersey's largest freshwater lake, spans 2,600 acres and stretches over six miles, forming part of the border between Sussex and Morris counties in the state’s northern Highlands region. Just 40 miles from Manhattan, its proximity to the city, combined with its scenic beauty, recreational appeal, and rich biodiversity, has long made it a desirable destination for visitors, residents, and businesses alike. The lake’s waters and surrounding habitats support diverse wildlife, including aquatic plants, animals, birds, and other terrestrial species.
Increased residential and commercial development, along with the impacts of climate change, have placed growing pressures on the lake’s ecosystem. Managing these pressures is vital to preserving water quality and protecting the biodiversity of both the lake and its watershed.
The Lake Hopatcong Foundation (LHF) and Lake Hopatcong Commission (LHC) are dedicated to protecting the lake and balancing development with environmental stewardship. Through thoughtful planning, long-term sustainability initiatives, and strategic partnerships, they have worked to safeguard the lake’s ecological, economic, and recreational value.
Princeton Hydro, a long-standing partner in this effort, has been involved in restoring the lake and managing its watershed for over 30 years. Our work has focused on reducing pollutant loads, managing stormwater runoff, addressing invasive aquatic plants and nuisance algal blooms, and enhancing habitat quality. Together with LHF, LHC, and funding partners, we have implemented a variety of projects designed to protect the lake and the communities that rely on it.
As a key partner, the New Jersey Highlands Council (Highlands Council) has provided essential funding for many of these critical projects, ensuring they come to fruition. These efforts reflect the Council’s commitment to safeguarding Lake Hopatcong’s future while upholding the Highlands Act’s mission to protect natural resources and foster sustainable community growth. These collaborations are vital to the initiatives that preserve the lake’s water quality, restore habitats, and promote the long-term health of the region.
In celebration of its 20th anniversary, the Highlands Council hosted a special event, which featured a “Lake Hopatcong Exhibit,” highlighting many of the successful projects that it funded. Representatives from LHC, LHF, Highlands Council, and Princeton Hydro, were on hand to discuss the significance of these projects and their contributions to the long-term health of the lake and surrounding communities.
The exhibit included a variety of interactive experiences, including informative posters and maps detailing project efforts. Participants were able to examine Lake Hopatcong water samples under microscopes with guidance from Dr. Fred S. Lubnow, Princeton Hydro Senior Technical Director of Ecological Services.
By highlighting both the challenges faced and the progress made, the exhibit offered attendees a deeper understanding of the lake’s critical role in the region’s environmental and economic sustainability as well as the ongoing efforts to maintain the lake's water quality and protect its ecological health.
Through funding from the Council, a variety of partners including LHF, LHC, Princeton Hydro, and local government agencies have been able to implement a myriad of projects. From stormwater management systems to watershed restoration efforts, these initiatives are designed to address issues like nutrient pollution, invasive species, and habitat degradation. These projects are helping to protect the lake’s water quality and ensure its healthy future:
In 2021, the Upper Musconetcong River Watershed Restoration Plan was updated to a 9-element WIP. This revision re-evaluated existing conditions, integrated green infrastructure, and incorporated emerging technologies. The WIP has since facilitated funding for projects such as biochar installation, alum treatments to reduce phosphorus, and stormwater management improvements. 25% of the WIP ($27,250) was used as match toward a National Fish and Wildlife Foundation (NFWF) grant ($485,650). This effort led to NJDEP 319 (h) Stormwater Grant for Biofiltration at Lakeside Fields ($239,000).
A restoration plan was developed for the watershed that directly flows to Memorial Beach through the park. A series of stormwater management measures were recommended and subsequent funding was secured. This effort led to community-funded project for the dredging of Memorial Pond ($277,000) and a slope stabilization with native plantings at Memorial Pond via a NJ Department of Environmental Protection 319(h) grant. $70,500 was also used as match for NFWF Glen Brook Project (Total Project - Glen, Muscy, Witten - $485,650)
Erosion of Floating Island, which located in Lake Hopatcong’s Landing Channel, contributed to significant sediment accumulation. A preliminary feasibility study conducted by Princeton Hydro explored dredging and habitat restoration options. The proposed beneficial reuse/dredging project would rehabilitate the island and lead to reduced phosphorus in the lake, increased beneficial wetland habitat, and improved water quality. The next phase of the project includes engineering design, permitting, and implementation.
A 25+ year-old feasibility study was updated to lay the groundwork for the the installation of sanitary sewers along the lakefront area of Jefferson Township, which is currently using septic systems. This marked the first step in addressing one of largest sources of phosphorus entering Lake Hopatcong and a pivotal milestone in the ongoing efforts to safeguard water quality and mitigate the risk of harmful algal blooms (HABs) on Lake Hopatcong. These efforts led to a Community Funded Project from Congresswoman Sherill’s Office ($750,000).
A bank stabilization design and planting plan was completed for a popular fishing location along the Musconetcong River between Lakes Hopatcong and Musconetcong. The project, led by the LHC with technical assistance from Princeton Hydro, aims to reduce sediment and nutrient levels in Lake Musconetcong by improving the condition of a key section of the Musconetcong River. The Highlands Council grant to Roxbury Township provided the critical first step in this long-term, multifaceted project.
Princeton Hydro completed a feasibility study for the design of an oxygenation system for Lake Hopatcong. It aimed to address the lake’s internal phosphorus load that contributes toward the nuisance HABs over the summer months. Since the widespread occurrence of HABs in 2019, the LHF and the LHC have been actively exploring solutions to reduce their frequency. Oxygenation systems help prevent stagnation of water, increasing circulation, disrupting thermal stratification which provides “through-column” mixing, and minimizes the occurrence of HABs. The results of this study will be used to move the project forward into the permitting and implementation phases.
A planting plan and regenerative stormwater conveyance system design was completed to aid in the mitigation of stormwater in Witten Park. A new system will help to manage and treat stormwater within the park, reducing erosion and sediment that flows into Lake Hopatcong. The system will also restore the floodplain, wetlands, and streams, and improve the ecological health of the area. The funding from the Council was also used by LHC as in-kind match for a NFWF grant award ($353,000) for the permitting & implementation phases.
One of the most significant recreational draws to Lake Hopatcong is its trout fishery, recognized regionally by anglers and established as an important component of the local economy. Data collected over the past 30 years at the lake was analyzed and showed increasing surface water temperatures, a trend that may suggest that the trout carryover habitat is being negatively impacted. The LHC, in cooperation with the LHF and the Knee-Deep Club, initiated a three-year trout tagging study. The study focused on the introduction of larger trout to assess the long-term population dynamics of those stocked fish and the general health of the fishery.
Planning documents, a hydraulic & hydrologic analysis, and an engineering report were prepared for the construction of two stormwater basin retrofits. The stormwater basin retrofit project aims to minimize runoff and reduce pollutants flowing into Lake Hopatcong, thus protecting water quality. The reconstruction of the basins is critical in managing stormwater effectively, preventing erosion, and reducing nutrient loads that contribute to harmful algal blooms. By improving these basins, the project plays a key role in safeguarding the lake's ecosystem and ensuring the long-term health of its water resources.
A field assessment, survey, and engineering design was completed for the installation of stormwater treatment devices at each of the outfall systems at the Shore Hills Beach Club property, which is located at the southern most tip of Lake Hopatcong. The primary goal of the project is to reduce phosphorus loads entering the lake, which can lead to nuisance weed growth, reduced water quality, and the proliferation of HABs. This funding from the Council enabled the project's next phase: construction.
As we celebrate the 20th anniversary of the New Jersey Highlands Council and its vital contributions to Lake Hopatcong, it’s clear that the future of this treasured resource relies on ongoing collaboration among stakeholders, local communities, and environmental organizations. By implementing innovative solutions and promoting sustainable practices, we can ensure that Lake Hopatcong continues to thrive as both an ecological haven and a recreational hub. This collective effort not only enhances the lake’s water quality and biodiversity but also strengthens the economic vitality of the surrounding communities, fostering a legacy of environmental stewardship for generations to come.
For the first time in over 200 years, the lower Bushkill Creek is now free-flowing and fully reconnected with the Delaware River and, ultimately, the Atlantic Ocean. This tremendous achievement signals a turning point for the ecological health of the Bushkill Creek watershed, supporting the passage of migratory fish species, bolstering ecologically beneficial freshwater mussel populations, reconnecting river habitats that benefit fish and wildlife, and enhancing water quality across the Delaware River Basin, which provides drinking water to millions of people.
"This significant, yearslong restoration effort exemplifies the power of conservation partnerships to achieve profound ecological impact,” said Princeton Hydro President and Founding Principal Geoffrey M. Goll, PE “The restored Bushkill Creek is more than a reconnected waterway—it is a revitalized natural resource that enhances biodiversity, supports community recreation, and contributes to the local economy in sustainable ways.”
Bushkill Creek begins at the foot of Blue Mountain in Bushkill Township, Pennsylvania, and flows for 22 miles through agricultural and suburban areas, including Easton. The limestone stream supports a thriving wild brown trout population and is designated as a “high-quality, cold-water fishery” cherished by anglers and the local community.
Since 2021, Wildlands Conservancy has led the charge to remove five aging dams along Bushkill Creek. While these structures once served industrial and community functions, they had become barriers to fish migration, disrupted the creek’s natural flow, and contributed to localized flooding and water quality issues. Now, with these obstacles cleared, Bushkill Creek flows freely from its headwaters to its confluence with the Delaware River.
Along the creek, the removal of Dam #2 signifies a momentous occasion in its restoration journey, representing the most recent advancement in dam removal efforts.
Led by the Wildlands Conservancy, the restoration of Bushkill Creek involved more than 20 stakeholders, including the Delaware River Basin Commission, Lafayette College, Pennsylvania Department of Environmental Protection, National Fish and Wildlife Foundation, Pennsylvania Department of Conservation and Natural Resources, and Princeton Hydro.
In a press release from the Wildlands Conservancy, President Christopher Kocher, praised the collaborative effort, stating, “This yearslong effort is a win for clean water for all the communities living in connection with the Bushkill Creek. It’s a wonderful example of the power of partnerships, and what community can do for community when nonprofits, local government, and state and federal agencies pool ideas and resources to invest in our treasured natural areas.”
To celebrate this tremendous accomplishment, Wildlands Conservancy, project partners, funders, and community volunteers gathered on October 15, 2024, at Lafayette College’s Karl Stirner Arts Trail.
The event included a volunteer-powered wildflower planting to complete the restoration work at this site, where Dam #1, formerly owned by Lafayette College, had been removed in 2023 with the support of Princeton Hydro. Spanning 90 feet in length and standing 4 feet high, the dam had severely obstructed fish passage, contributed to local flooding, and impaired water quality over time. The college enthusiastically supported the dam's removal, dedicating substantial resources to see the project to completion.
Wildlands Conservancy, a non-profit land trust based in eastern Pennsylvania, is dedicated to the restoration of degraded stream and wildlife habitats, with a primary focus on the Lehigh Valley and the extensive Lehigh River watershed, which spans 1,345 square miles, eventually merging with the Delaware River. For over a decade, Princeton Hydro has been a steadfast partner to Wildlands Conservancy in their mission, collaborating on multiple dam removal projects in the Delaware River Watershed.
Princeton Hydro is excited to announce that the Musconetcong Island Park Project received the New Jersey Future 2024 Smart Growth Award. This project, led by the Musconetcong Watershed Association (MWA), transformed a crumbling, long-abandoned laboratory into a vibrant, accessible riparian park space that provides opportunities for fishing, wading, paddling, and viewing wildlife in Bethlehem Township, NJ.
The site, which once housed a two-story concrete block laboratory used by the Asbury Graphite Mill, had become a hazard after decades of disuse. Located on a quarter-acre island in the Musconetcong River, the building was not only structurally unsound but also in the floodway of the River, posing ongoing risks to the surrounding environment. Through a collaborative, multi-year effort, the abandoned building was demolished, the area was restored, and the island was transformed into a welcoming, accessible space for public enjoyment and recreation.
The image below shows the old stairway, laboratory building, and island space with a white outline depicting the project area:
The Musconetcong Island Park Project represents a successful collaboration among numerous partners. Led by MWA, the project involved National Fish and Wildlife Foundation, the Township of Bethlehem, Harrington Construction, and Princeton Hydro.
Princeton Hydro provided engineering and environmental consulting services for the project. Our scientists and engineers completed all necessary permitting, designed both the conceptual and final restoration plans, and oversaw construction throughout the project.
Funding for the project was secured through three primary sources: New Jersey Green Acres Program, National Park Foundation, and U.S. Fish and Wildlife Service’s Delaware Watershed Conservation Fund. These grants were instrumental in facilitating the transformation of an industrial relic into a thriving park space, balancing the preservation of the river's natural resources with the creation of an accessible community destination.
The two-story concrete block building that once stood on Musconetcong Island was originally the Asbury Graphite Mill laboratory, constructed between 1925 and 1940. It was built on the foundation of a woolen factory that had been destroyed by fire in 1881. The laboratory was used for testing graphite, an inert and non-toxic mineral primarily used for lubrication and other industrial applications. Graphite refining began in Asbury in 1895, when Harry M. Riddle purchased the existing mills and converted them for this specialized purpose.
By the early 1980s, the laboratory was abandoned due to frequent flooding and a lack of modern plumbing. Despite its industrial history, the building had become a safety and environmental concern due to its floodway location and deteriorating condition. In 1999, the laboratory building was donated to the Musconetcong Watershed Association, who then initiated efforts to restore the site and transform it into a valuable public resource.
Today, the island has been transformed into a place where residents and visitors can enjoy the Musconetcong River. With improved access, new stairways, and interpretive signage sharing the history of the area, Musconetcong Island Park is a prime example of how thoughtful design can blend environmental restoration with community-focused development.
“We are honored to have contributed to the transformation of Musconetcong Island Park and proud to see this project recognized with a New Jersey Future Smart Growth Award for its role in enhancing the Musconetcong River Watershed. It reflects our commitment to sustainable design and the power of collaboration in creating lasting, positive impacts for both the environment and the community. It’s truly a win-win — removing an obstruction from the floodway while providing public access to the river,” said Geoffrey M. Goll PE, President of Princeton Hydro.
Since 2002, the New Jersey Future Smart Growth Awards have celebrated the best examples of sustainable planning and development across the state. The Musconetcong Island Park Project exemplifies these values by enhancing public access to nature, improving resilience to flooding, and fostering sustainable recreation opportunities in the heart of Bethlehem Township. The project showcases the importance of balancing environmental restoration with community needs, creating a space where people can connect with nature while preserving and protecting it for future generations.
The 2024 New Jersey Future Smart Growth Awards recognize six outstanding projects that exemplify innovative and sustainable development. This year’s award ceremony and celebration took place yesterday at the New Brunswick Performing Arts Center.
Click here to learn more about the awards and to view the full list of 2024 Smart Growth Award recipients.
MWA is an independent, nonprofit organization dedicated to protecting and improving the quality of the natural and cultural resources of the Musconetcong River and its Watershed. Members of the organization are part of a network of individuals, families, and companies that care about the Musconetcong River and its watershed, and are dedicated to improving the watershed resources through public education and awareness programs, river water quality monitoring, promotion of sustainable land management practices, and community involvement. Click here to learn more.
Princeton Hydro has been working with MWA in the areas of river restoration, dam removal, and engineering consulting since 2003. Explore how the partnership between Princeton Hydro and the MWA led to the historic return of American shad to the Musconetcong River for the first time in over 250 years, revitalizing the ecosystem—read the full story here!
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