We’re committed to improving our ecosystems, quality of life, and communities for the better.
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After 129 years, the Paulina Dam in Warren County is in the final stages of demolition. This project, led by The Nature Conservancy's New Jersey Chapter, is hailed by local advocates as a significant environmental victory. The complete removal of the dam, scheduled from July through September 2024, signifies a major milestone in the restoration of the Paulins Kill River, New Jersey’s third-largest tributary to the Delaware River.
On November 24, 2023, a crucial step in the restoration journey was taken with the first notching of the Paulina Dam. This initial effort set the stage for the final phases of the dam removal, which are now in full swing. The project, a successful collaboration between The Nature Conservancy, U.S. Fish and Wildlife Service, NJDEP Division of Fish and Wildlife, RiverLogic-Renova Joint Venture, and Princeton Hydro, is progressing smoothly towards its goal.
Click below to watch a new video showcasing the project's progress. The drone footage captures the project team in action, demolishing the dam, removing silt upriver, and strategically placing rocks and boulders to control the flow of silt as the removal process continues.
The Paulina Dam, located in Blairstown Township, Warren County, NJ has long posed challenges to the river’s health and surrounding communities. Originally constructed to produce hydropower, it has not functioned in that capacity for over 50 years. Its removal is crucial not only for mitigating risks to life and property but also for restoring the natural habitat for native species like brook trout and migratory fish.
This initiative aims to:
The removal of the Paulina Dam is part of a larger restoration plan initiated in 2013, which includes the removal of multiple dams along the Paulins Kill River. This comprehensive effort, involving wetland restoration, land protection, and floodplain reforestation, aims to rejuvenate and sustain the river ecosystem.
Princeton Hydro’s President, Geoffrey M. Goll, PE, highlights the broader impact of these efforts: “The removal of Paulina Dam is not just about dismantling a structure and removing a safety hazard, but paving the way for a renewed riverine landscape, where the flow of life returns to its natural course.”
As we celebrate this major milestone, we look forward to witnessing the continued transformation of the Paulins Kill River. This project stands as a testament to the power of collaboration, environmental stewardship, and the unwavering dedication of communities and organizations committed to preserving and restoring our natural landscapes.
Stay tuned for more updates as we continue this exciting journey towards a restored and thriving river ecosystem! Click here to learn more about the Paulina Dam removal and the broader restoration efforts.
Nestled at the foot of the Blue Ridge Mountains, Smith Mountain Lake is the largest lake entirely within the Commonwealth of Virginia. Spanning over 20,000 acres with 500 miles of shoreline, the lake's northern and eastern boundary is marked by Bedford County, while Franklin and Pittsylvania counties define its southern and western edges. Created in 1963 by impounding the Roanoke River with the Smith Mountain Dam, the lake serves multiple purposes, including hydroelectric power, public water supply, and recreation.
Throughout the 1960s and 1970s, the area surrounding Smith Mountain Lake was predominantly rural farmland. In the 1980s, however, the lake's natural beauty, recreational appeal, and proximity to Roanoke and Lynchburg began to draw increased attention. This surge in interest sparked a boom in residential and commercial development, transforming Smith Mountain Lake into a vibrant and bustling community.
Today, Smith Mountain Lake not only provides electricity and drinking water, it is also home to 21,000 residents and stands as a premier recreational resource. Thousands flock to Smith Mountain Lake each year to enjoy boating, swimming, fishing, and other water activities. The lake's shores are now dotted with resorts, condominiums, year-round residences, and outdoor industry businesses. The lake's waters and shoreline also provide vital habitats for aquatic plants, animals, birds, and other terrestrial wildlife.
The rapid growth of this pristine lake community underscores the importance of effective environmental management to preserve water quality, strengthen the shoreline, manage stormwater runoff, and protect the local native biodiversity of the lake and its watershed.
The lake is fed by two main tributaries—the Blackwater River and the Roanoke River. The Roanoke River, the larger of the two, drains a watershed that includes the Roanoke Metropolitan area, while the Blackwater River flows through mostly rural and agricultural land.
In 2023, a significant outbreak of harmful algal blooms (HABs) in the Blackwater River subwatershed raised concerns for the Smith Mountain Lake Association (SMLA). These blooms, primarily driven by agricultural runoff, led to swimming advisories and highlighted the need for a comprehensive approach to managing and mitigating these environmental threats.
Recognizing the urgency of the situation, SMLA sought the expertise of Princeton Hydro. The mission: to investigate conditions that cause HABs, protect the lake from future outbreaks, and ensure the long-term health of this vital freshwater resource.
The project team’s approach began with a thorough review of historical water quality data. Collaborating with SMLA and regulatory bodies including the Virginia Department of Environmental Quality (VDEQ), U.S. Geological Survey (USGS), and U.S. Army Corps of Engineers (USACE), Princeton Hydro compiled a comprehensive dataset. This historical context was crucial for understanding past trends and informing the 2024 Watershed Assessment. SMLA and Ferrum College contributed over 38 years of data through their Volunteer Water Quality Monitoring Program, documenting crucial indicators such as nutrient levels, bacterial counts, and algal blooms. This extensive dataset has been essential in informing effective lake management practices and shaping strategies to address current environmental challenges.
Employing the MapShed model, the team carried out a comprehensive hydrologic and nutrient loading analysis of the Blackwater River subwatershed. They evaluated critical factors, including phosphorus, nitrogen, and sediment levels, to identify and prioritize areas requiring targeted nutrient and sediment management strategies.
To describe its basic function, the MapShed model applies pollutant loading rates to different land cover types, like low-density development or forested wetlands, based on their area. It then uses weather data, soil characteristics, and slopes to adjust these results. The model simulates daily pollutant loads over 30 years using actual climate records, providing monthly and annual outputs. Users can adjust various inputs, like septic system efficiency and population density, to see how the changes affect pollutant loads and water flow.
This analysis laid the foundation for determining effective, focused interventions to curb nutrient runoff and mitigate future HABs.
In March 2024, an Overwintering Incubation Study was conducted to understand cyanobacteria behavior. Sediment and water samples were taken from six nearshore locations known for high cyanobacteria counts in Summer 2023. At each site, the team also documented temperature, dissolved oxygen, specific conductivity, pH, chlorophyll-a, phycocyanin (PC), and phycoerythrin (PE).
The map below identifies the locations of each of the six sampling sites:
For each sample, the lake water was filtered and then incubated with respective sediments to determine the presence and what types of algae may be overwintering. The water and sediment samples were incubated over a period of 15 days at a temperature of approximately 77 degrees Fahrenheit and a light intensity of 2800 lux.
After eight days, the water and sediment samples were removed from the incubator, slightly stirred and then in-situ measurements for PC and PE were collected. These two supplemental pigments are almost exclusively produced by cyanobacteria. While PC is associated with primarily planktonic genera, PE is more associated with benthic genera. Thus, measuring the concentration of these pigments can be used to estimate cyanobacteria biomass as well as provide guidance on the monitoring and management of HABs (planktonic vs. benthic).
After 15 days, the samples were again removed from the incubator, slightly stirred, and then measured for PC and PE to identify and count any overwintering cyanobacteria and determine all the types of algae present.
This study offered critical insights into the conditions that enable cyanobacteria to endure winter and proliferate during warmer months. By understanding the connection between overwintering cyanobacteria and HABs in the lake, we can enhance predictive capabilities and develop more effective management strategies. Two particularly notable findings from the study include:
Beyond the initial assessment on the Blackwater River, ongoing monitoring of Smith Mountain Lake’s water quality is crucial for understanding and managing the conditions that trigger HABs. SMLA’s Water Quality Monitoring Program developed and managed by Ferrum College continues the work of tracking the trophic state of the lake. Algal community composition, tributary sampling, and bacterial monitoring are part of this comprehensive 38-year effort. Consistent sampling and water quality monitoring can help identify cyanobacteria and akinetes, the dormant spores that lead to bloom formation.
Because the VDEQ budget historically contains no funding for inland waterway HAB research and response, SMLA actively lobbied the Virginia General Assembly for the allocation of $150,000 for the creation of a watershed study. This request was included in the State budget signed in March of 2024 and the work to develop the objectives and scope of the study is underway now.
Community involvement is also vital for maintaining Smith Mountain Lake as a cherished resource. To this end, SMLA has launched "Dock Watch," a new community science volunteer program designed to monitor HAB activity. Beginning in May of 2024, volunteers have been collecting water samples at select docks around the lake and are examining them to better understand cyanobacteria activity levels and trends. All of the water quality data collected at the lake is from main channel locations. The primary recreational contact with the lake water by residents is at their docks. This data is uploaded to NOAA's Phytoplankton Monitoring Network, contributing to a national database used for HAB research. This collective effort ensures rapid identification and tracking of HAB activity, benefiting both the local community and environmental research on a national level.
“This project exemplifies a holistic approach to lake management and environmental stewardship, integrating historical data, advanced modeling, and community engagement to prioritize and implement innovative strategies that effectively mitigate HABs and protect water quality,” said Chris L. Mikolajczyk, Princeton Hydro’s Senior Manager of Aquatics and Client Manager for Smith Mountain Lake. “This ongoing work highlights the importance of science-based interventions in preserving our precious natural resources.”
The Smith Mountain Lake Association is a 501(c)3 nonprofit with the mission to keep Smith Mountain Lake clean and safe. Founded in 1969, SMLA is the longest serving advocate for the Smith Mountain Lake community, and its focused efforts help to retain the pristine beauty of the lake and the vibrant local economy. Click here to learn more and get involved.
Over the last two decades, the Princeton Hydro team has improved water quality in hundreds of ponds and lakes, restored many miles of rivers, and enhanced thousands of acres of ecosystems in the Northeast. From species surveys to water quality monitoring, our professionals perform comprehensive assessments in order to understand the landscape. Using tools like ArcGIS, we can map and model the watershed and arrive at holistic solutions for resource management. Our natural resources and lake management experts are complemented by our field team who utilize amphibious vehicles for mechanical invasive species removal, install aeration systems to improve water quality, and conduct natural lake treatments to manage algal blooms. We have secured millions of dollars in grant funding for watershed and ecological restoration projects on behalf of our clients.
Click here to learn about the Watershed Management Program in Somerset County, for which we recently helped secure grant funding from the New Jersey Highlands Water Protection and Planning Council.
July is Lakes Appreciation Month, an annual celebration dedicated to highlighting the value and wonder of our lakes and reservoirs. Established by the North American Lake Management Society (NALMS) in 1998, this initiative aims to foster a greater appreciation for these vital water bodies and encourage action to safeguard them. Join us this year as we explore three exciting and meaningful ways to engage with, enjoy, and protect our lakes.
Dive into Lakes Appreciation Month by soaking up the beauty of your local lakes. Whether you’re a bird-watching enthusiast, a kayaking adventurer, a fishing fanatic, or a nature lover who enjoys serene walks, getting outdoors for some lakeside enjoyment is the perfect way to show your appreciation for these natural treasures.
While you're out enjoying your community lakes, participate in the NALMS "Show Your Lakes Appreciation" Photo Contest Challenge! Throughout July, share a #lakeselfie or photos of your friends, family and pets, enjoying or working on a lake or reservoir. Post your pictures on Facebook, Twitter, or Instagram with a fun or informative caption, the name of the lake, and the hashtag #LakesAppreciation. Be sure to tag NALMS in your post for a chance to win exciting prizes. The contest runs from July 1st to 31st, with winners announced on August 2nd.
Always remember to respect nature by following Leave No Trace principles, ensuring our lakes stay pristine and beautiful for everyone to enjoy.
Monitoring the health of our lakes is essential for preserving their ecological balance and ensuring they remain vibrant, safe, and enjoyable.
You can contribute to this effort by joining the annual Secchi Dip-In, a citizen science project where volunteers across North America measure water clarity using a Secchi disk. This event, organized by NALMS, helps track changes in water quality over time. By participating, you contribute valuable data to support lake conservation efforts. It's simple to get involved: obtain a Secchi disk, measure the transparency of your lake, and submit your findings online. Check out our instruction video for more info:
In addition to measuring water clarity, keep an eye out for harmful algal blooms (HABs). HABs can produce toxins that negatively impact water quality and aquatic life. To track and report HABs consider using the bloomWatch app, a crowdsourced citizen-science tool that allows you to take photos of possible blooms and submit them through the app, sending the information to relevant state officials for further action. Monitoring and reporting HABs is a crucial step in protecting our lakes.
Volunteering for lake cleanups is a rewarding way to contribute to environmental stewardship, protect water quality, and enhance recreational spaces. Gather friends, family, or community members to spend a day picking up trash and debris around your favorite lake. This not only improves the health and beauty of the lake but also fosters a sense of community pride and collective responsibility. Many lake associations and environmental groups host regular cleanup events, so check their calendars or consider starting your own initiative.
For Lake Hopatcong, New Jersey's largest lake, the Lake Hopatcong Foundation, a long-time client partner of Princeton Hydro, offers a "Lake Hopatcong Water Scout" volunteer program. Water Scouts are responsible for identifying and removing instances of the invasive water chestnut species. Volunteers survey their assigned areas at least once between mid-June and mid-July. You can choose your preferred location to volunteer by reviewing the available areas on their website map. Reach out to your local lake association to find similar opportunities for cleanup and lake stewardship activities.
By raising awareness, fostering collaboration, and implementing effective strategies, we can work towards safeguarding the health and sustainability of our freshwater ecosystems. Let's come together this July to celebrate, protect, and cherish our lakes, ensuring they remain healthy and vibrant for future generations. For more ideas on how to celebrate Lakes Appreciation Month and to learn about NALMS, visit their website. For more information on Princeton Hydro's expansive lake and natural resource management services, go here.
Get ready to explore the hidden wonders of nature right in the heart of Flemington, New Jersey!
We are thrilled to announce BioBlitz 2024, an exciting 24-hour event dedicated to discovering and documenting the diverse species that call Flemington Borough home.
Mark your calendars for this immersive citizen science experience starting on Saturday, June 22nd at 11 AM and concluding on Sunday, June 23rd at 12 PM, hosted by Flemington DIY, with experts from Princeton Hydro and Hunterdon County Queer Birders.
A BioBlitz is a community-driven event where volunteers and scientists come together to identify and record as many species as possible within a designated area over a short period. Unlike traditional scientific surveys that typically must be implemented by licensed professionals, a BioBlitz invites people of all ages and backgrounds to participate, fostering a connection between the community and its local environment. The goal is to create a snapshot of biodiversity, providing valuable data for ecological studies and conservation efforts.
Discover Local Wildlife: Whether you're a seasoned naturalist or just curious about nature, this event offers a unique opportunity to explore Flemington's urban and natural landscapes. You'll have the chance to observe a variety of plants, animals, and other organisms, some of which you may have never noticed before.
Contribute to Science: By documenting species using the iNaturalist app, your observations will contribute to a growing database that helps scientists and researchers understand and protect local biodiversity. Your findings can make a difference in ongoing conservation efforts.
Connect with the Community: BioBlitz 2024 is a chance to meet fellow nature enthusiasts, learn from experts, and work together towards a common goal. It's a fun, educational experience for families, students, teachers, and anyone interested in the natural world.
Located in the watershed of the South Branch of the Raritan River and home to sections of watershed attached to Prescott Brook, Bushkill Creek, Walnut Brook, and the First Neshanic River, Flemington's diverse environments offer a unique setting for this event. Residents of the Borough are highly encouraged to document the wildlife in their own backyards as part of the event.
Participating in the BioBlitz will help create a comprehensive baseline species list that can be compared with future studies and historical data. This information is crucial for understanding how local biodiversity changes over time and for making informed decisions about environmental conservation.
The idea for Flemington’s BioBlitz was inspired by Princeton Hydro Aquatic Ecologist Jesse Smith. Jesse’s vision of engaging the community in a collaborative effort to explore local biodiversity led to this inaugural event, hosted by Flemington DIY.
“My idea to do this BioBlitz came from an interest in knowing more about what was present in Flemington, with a hope that this event will help others become more interested in the natural world in their backyard,” said Jesse Smith, event coordinator, Flemington DIY volunteer, and Aquatic Ecologist at Princeton Hydro.
This event will span 24 hours in order to provide participants an opportunity to document species that are more active at dusk, dawn, and at night. The event is free and open to all ages. Children under 18 must be accompanied by an adult.
Location: Flemington DIY, 26 Stangl Road, Flemington, NJ
Start Date & Time: Plan to arrive at Flemington DIY on Saturday, June 22 at 11 AM to check-in and review important event details.
BioBlitz Timeframe:The documentation phase kicks off on June 22 at noon and wraps up on June 23 at noon. Although the event spans a full 24 hours, participants are not expected to be actively documenting the entire time. You can choose the times that best fit your schedule within this 24-hour window.
End Date & Time: Return to Flemington DIY on 6/23 at 12pm for the conclusion of the BioBlitz to review collected data and celebrate our findings!
What to Bring: Download the iNaturalist app on your smartphone for species identification. No prior expertise is required, and field guides will be provided. Wear comfortable shoes and bring rain gear just in case.
Whether you’re passionate about birds, plants and insects, curious about the natural world, or looking for a fun excuse to get outside, BioBlitz 2024 is the perfect opportunity to immerse yourself in Flemington’s rich biodiversity. Let’s come together to discover, learn, and contribute to our community’s natural heritage. For more information and to register for the event, please visit Flemington DIY's BioBlitz page.
Did you know that New York State is home to a rich tapestry of natural waterbodies, including over 7,600 freshwater lakes, ponds, and reservoirs? Our team recently journeyed to Lake George, New York, to participate in the 41st annual conference of the New York State Federation of Lake Associations (NYSFOLA).
This year’s conference, themed “It Takes a Community to Protect a Watershed,” brought together environmental experts, lake management professionals, students, recreation enthusiasts, watershed advocates, and lake community members to advance the best available information and techniques for protecting and restoring New York’s watersheds. The two-day program featured a diverse exhibitor hall, networking events, a silent auction, a student poster session and a variety of presentations and workshops that combined science, policy, practical applications, and tangible resources.
Princeton Hydro, a proud sponsor of the conference, led two presentations during the “Climate Resilience and Your Lake" segment of the educational program:
Michael Hartshorne, Director of Aquatics, delivered an insightful presentation titled "Impacts of Climate Change on Lake Ecology," which delved into the significant role of climate change in shaping lake ecosystems. During the session, Michael highlighted key factors such as rising water temperatures, heightened frequency and severity of rainfall, depletion of dissolved oxygen, fluctuating patterns of algal blooms, and the migration of invasive species due to changing latitudinal conditions. His presentation underscored the necessity for evolving approaches to lake management in response to these profound ecological shifts.
Dr. Fred Lubnow, Senior Technical Director of Ecological Services, presented "A Survey of the Ecology of Select Lakes and Ponds in Central Park, NYC," which provided an insightful overview of Princeton Hydro's water quality and ecological monitoring efforts conducted across lakes and ponds of Central Park from 2020 to 2023 for the Central Park Conservancy. These assessments revealed elevated nutrient levels driving planktonic algae, filamentous mat algae and in some cases high densities of aquatic plants, prompting the Central Park Conservancy and Princeton Hydro to collaborate on a tailored Management Plan. Fred’s presentation spotlighted the distinct ecological profiles of key sites, addressed the impact of cyanobacteria on both ecological dynamics and recreational usage, and provided practical management methods and techniques.
Additional educational session topics included, Environmental Justice and New York Lakes, Community Leadership for Healthy Lakes in New York State, and iMap Invasive Species Workshop. Click here to view the complete agenda.
Founded in 1983, NYSFOLA is a not-for-profit coalition of lake associations, individuals, and corporate members dedicated to the protection and restoration of New York lakes. Princeton Hydro is the industry leader in lake restoration and watershed management. We have conducted diagnostic studies and have developed management and restoration plans for over 300+ lakes and watersheds throughout the country. Our long-standing partnership with NYSFOLA as a corporate member, annual conference sponsor, and active participant highlights our unwavering commitment to collaborative initiatives aimed at safeguarding our water resources. To learn more about our lake and natural resource management services and how we're contributing to a healthier environment, click here.
Nestled within the New Jersey townships of Hamilton, Robbinsville, and West Windsor lies Miry Run Dam Site 21—an expansive 279-acre parcel with a rich history dating back to its acquisition by Mercer County in the late 1970s. Originally earmarked for flood mitigation and recreation, this hidden gem is on the cusp of a remarkable transformation, poised to unveil its true potential as a thriving public park.
Central to the revitalization efforts is a comprehensive Master Plan, meticulously crafted by Mercer County Park Commission in partnership with Simone Collins Landscape Architecture and Princeton Hydro. This visionary roadmap encompasses a spectrum of engineering and ecological uplift initiatives, including:
The Master Plan serves as a long-term vision for improvements to the property and will be implemented over multiple phases. In 2021, it was recognized with the Landscape Architectural Chapter Award from the New Jersey Chapter American Society of Landscape Architects, which underscores its innovative and impactful approach to landscape design.
Now, Dam Site 21’s revitalization has begun with a crucial endeavor: the dredging of its 50-acre lake. This process, spearheaded by Mercer County Park Commission in collaboration with Princeton Hydro, aims to rejuvenate the water body by removing accumulated debris, sediment, and invasive vegetation—a vital step towards restoring its ecological balance. Beyond the aesthetic and ecological improvements, dredging enhances accessibility for recreational activities that provide an opportunity to create a deeper connection between the park’s visitors and its beautiful natural landscape.
Based on the bathymetric assessment, which the Princeton Hydro team completed as part of the Master Plan, the dredging efforts are focused on three primary areas: Area 1 is located in the main body of the lake just downstream of Line Road and will generate approximately 34,000 cubic yards of dredged material; Area 2, which has approximately 4,900 cubic yards of accumulated sediment is located in the northeast cove, just north of Area 1; and Area 3, the northwestern cove, entails the removal of approximately 7,300 cubic yards of accumulated sediment.
Before the dredging work could begin, the Princeton Hydro team was responsible for providing a sediment sampling plan, sample collection and laboratory analysis, engineering design plan, preparation and submission of all NJDEP regulatory permitting materials, preparation of the technical specifications, and bid administration. Currently, our team is providing construction administration and oversight for the project.
The journey towards Dam Site 21's revival has been marked by meticulous planning, design, and community engagement spanning several years. With the commencement of dredging operations, the project's vision is gradually materializing—a testament to the dedication of all stakeholders involved. As the first phase unfolds, anticipation mounts for the realization of a vibrant, inclusive public space that honors both nature and community.
As Dam Site 21 undergoes its metamorphosis, it symbolizes not just a physical restoration, but a renewal of collective vision and commitment. Ultimately, Dam Site 21 isn't just a park—it's a testament to the enduring legacy of conservation, community, and the transformative power of restoration.
The significance of Dam Site 21's transformation extends far beyond its recreational appeal. It embodies a commitment to environmental stewardship, with measures aimed at bolstering flood resilience, improving water quality, and nurturing diverse wildlife habitats. By blending conservation with recreation, the project strikes an important balance between creating access for community members to enjoy the space and ecological preservation that puts native plants, critical habitat, and wildlife at the forefront.
To learn more about the restoration initiative and view the Final Master Plan, visit the Mercer County Park Commission’s website. Click here to learn about another one of Princeton Hydro’s recent restoration efforts. And, stay tuned here for more Mercer County Park Commission project updates!
In recognition of World Water Day on March 22, it's important to acknowledge and explore the challenges affecting our freshwater ecosystems. In this blog post, we explore one of those said challenges: Harmful Algal Blooms (HABs).
HABs, characterized by rapid overgrowths of cyanobacteria, have increasingly drawn attention due to their detrimental effects on water quality and aquatic ecosystems. With the onset of spring, rising temperatures create favorable conditions for cyanobacteria growth, setting the stage for potential bloom occurrences in the months ahead. Over recent summers, lakes and freshwater bodies across the nation have faced closures and health advisories due to HAB outbreaks, underscoring the urgent need to address this issue.
Cyanobacteria, often referred to as blue-green algae, are naturally occurring microorganisms in aquatic environments. However, under specific conditions—such as warm temperatures and nutrient-rich waters—these organisms can proliferate rapidly, forming blooms that pose risks to the health of humans, wildlife and aquatic species, local economies and overall ecological balance.
The interplay between climate change and HABs is undeniable: Rising temperatures and altered precipitation patterns create favorable conditions for cyanobacteria growth, exacerbating bloom occurrences. The absence of snow cover and early ice melt further accelerates this process, allowing cyanobacteria to flourish earlier in the year. Over the past few summers, lakes and fresh-waterbodies across the nation experienced closures and health advisories as a result of HAB outbreaks, emphasizing the urgency of addressing this issue.
In light of these challenges, proactive measures are crucial for mitigating the impacts of HABs. Early sampling efforts, initiated as early as March or April, enable the detection of cyanobacteria and akinetes, dormant spores that contribute to bloom formation. Additionally, reducing nutrient inputs, particularly phosphorus, into waterways is essential for preventing HABs.
As we reflect on the significance of water resources on World Water Day, it’s imperative to recognize the importance of addressing threats such as HABs. By raising awareness, fostering collaboration, and implementing effective strategies, we can work towards safeguarding the health and sustainability of our freshwater ecosystems.
In this spirit, we invite you to join the conversation at the Harmful Algal Bloom Summit 2024, hosted by the New Jersey Department of Environmental Protection. This virtual seminar, taking place on March 27, is free to attend and offers a platform for stakeholders to exchange insights, discuss best practices, and explore innovative solutions for managing HABs.
This year's Summit, which is titled “Unlocking the Puzzle of Harmful Algal Blooms," includes a keynote address and three educational sessions - "Growth Through Reflection: Lessons Learned," "Innovative Tools and Applications," and "Beyond the Numbers" - each featuring a variety of expert presentations. Princeton Hydro Senior Technical Director of Ecological Services Dr. Fred Lubnow is presenting on "Quantifying Overwintering Cyanobacteria and How They May Impact the Monitoring and Management of HABs."
Get more information and register here.
As we commemorate World Water Day 2024, let us reflect on the interconnectedness of water and life. Small actions taken today can have a profound impact on preserving water quality for future generations. Join us in making a commitment to promote and do our part to support a sustainable future for our freshwater ecosystems.
We are thrilled to announce the newest addition to our fleet: The Marsh Master® 2MX-KC-FH! This multi-functional, eco-friendly, and fully amphibious machine is specifically designed to work in wetland environments with minimal disruption to the delicate ecosystem.
One of the Marsh Master®'s primary roles is combating invasive and nuisance plant species, including the notorious non-native Phragmites australis, also known as Common Reed. Utilizing its innovative leveling and cutting mechanisms, this powerhouse of a machine efficiently knocks down and chops up sprayed or winter-weakened vegetation. Equipped with two powerful rotary blades, it effortlessly cuts through dense underbrush and tall marsh grasses, effectively controlling invasive weeds and problematic plant growth.
"We are committed to offering more non-chemical alternatives for aquatic invasive species control. The Marsh Master® 2MX-KC-FH is the second marsh buggy in our fleet," said Geoffrey M. Goll, President of Princeton Hydro. "This model is larger and more powerful, allowing us to cover more ground in a shorter period of time. Adding this machine to our fleet is an important investment in achieving our firm's environmental stewardship goals."
What sets the Marsh Master® apart is its versatility and low environmental impact. With its lightweight construction and advanced weight distribution system, it exerts low ground pressure and boasts high floating capacity. This allows the Marsh Master® to operate seamlessly on water, in deep or shallow depths, and on dry land without disturbing sensitive environments like nature preserves, wetlands, and canal banks. Its highly maneuverable design ensures easy passage through narrow channels and around hazards, making it the ideal choice for a wide range of applications.
But the Marsh Master® is not just a one-trick pony. With a wide array of tools and accessories, it can perform a variety of functions, from weed cutting and harvesting to debris removal to excavation to soil sampling.
During a recent project in Middlesex County, we put the Marsh Master® to the test to clear an area overrun with Phragmites australis. These invasive weeds not only create dense thickets unsuitable for native fauna but also outcompete local vegetation, leading to a decrease in plant diversity. Thanks to the Marsh Master®'s efficient cutting and rolling capabilities, we were able to expose the marsh plain and get it ready for planting of native vegetation in the Spring. This is just one example of how the Marsh Master is making a tangible difference in restoring delicate ecosystems.
Through a combination of prevention, early detection, eradication, restoration, research and outreach, we can protect our native landscapes and reduce the spread of invasive species. Learn more about our invasive species removal and restoration services.
In Warrington Township, Pennsylvania, an innovative ecological uplift initiative is underway at Lion's Pride Park. This project aims to transform a stagnant pond, overrun with invasive species and plagued by water quality issues, into a thriving wetland mosaic. This endeavor, a collaborative effort between Warrington Township, Princeton Hydro, and other stakeholders, promises to not only revitalize the natural environment but also enhance community access and education within the park.
Spanning 47 acres, Lion's Pride Park serves as a green oasis within the Township, offering a range of recreational and educational opportunities for visitors of all ages and abilities.
The pond within the park was in urgent need of restoration - heavy storm events caused the pond to overflow, which created flooding conditions in the park. The local native biodiversity was being threatened by nusiance and invasive species like water chestnut (Trapa natans). The photos below were taken in April 2020.
Princeton Hydro began in 2020 with site investigation and field surveys, including:
The most substantial component for the restoration project was the conversion of the existing pond to an emergent wetland complex to provide habitat for a wide variety of native species. Using the completed existing conditions reports and surveys, Princeton Hydro prepared the conceptual design plan that informed the entire restoration process.
Princeton Hydro Regulatory Compliance & Wildlife Surveys Project Manager Emily Bjorhus, PWS spearheaded the regulatory program for the project, navigating approvals from the Pennsylvania Department of Environmental Protection (PADEP), the U.S. Army Corps of Engineers (USACE), and the Bucks County Conservation District. The permitting process laid the groundwork for the smooth implementation of this design-build restoration project.
The restoration work encompassed various stages, from earthwork and vegetation planting to the installation of ADA-compliant pathways and informational signage. Some of the key project elements, include:
Channel stabilization: Stabilizing the channels within the park, addressing erosion issues, enhancing water flow dynamics, and promoting the establishment of diverse aquatic habitats.
Berm construction: Installing berms to enhance wetland habitat and promote natural floodplain connectivity, contributing to the resilience of the ecosystem to flooding events.
Native vegetation planting: Reintroducing native wetland and riparian plant species to enhance biodiversity and create habitat corridors for wildlife within the park. Planting is expected to take place in the Spring.
Boardwalk installation: Constructing a 6-foot-wide ADA-compliant boardwalk that spanned approximately 230 linear feet, providing visitors with accessible pathways to explore the restored wetland areas.
Through these strategic interventions, the Lion's Pride Park Ecological Restoration Project aims to not only rejuvenate the ecological integrity of landscape but also enrich the recreational and educational experiences of the community. The project, which is slated for 100% completion this Spring, will totally transform the landscape into a diverse wetland complex that fosters native wildlife habitat, mitigates water quality concerns, reduces nonpoint source pollutants discharged to downstream waters, and provides accessible pathways and observation platforms so all community members may enjoy and learn from this restored aquatic setting.
The reclaimed wetland provides additional bird and pollinator habitat and offer visitors a diverse ecosystem to learn from within the park. By fostering a deeper connection to nature and promoting environmental stewardship, this project exemplifies the transformative power of ecological restoration in creating vibrant, sustainable communities.
On March 23, at the 2024 Watershed Congress hosted by the Delaware Riverkeeper Network, Emily will be presenting about the Lion's Pride Park Ecological Restoration Project. Her presentation will offer insights into the regulatory approval and permitting process, takes a deeper dive into the restoration strategies, and showcases the ecological significance of the project. Click here to learn more about the 2024 Watershed Congress.
Emily, a certified Professional Wetland Scientist, is a Project Manager that specializes in environmental regulatory compliance, ecological services and wildlife surveys. She leads federal, state and local environmental permitting processes, NEPA compliance and documentation, Endangered Species Act Section 7 consultations, and Clean Water Act Section 404(b)1 analyses.
The Lion's Pride Park Ecological Restoration Project exemplifies a holistic approach to environmental conservation, community engagement, and public recreation. By repurposing a neglected pond into a vibrant wetland mosaic, this initiative embodies the principles of ecological resilience and inclusive urban planning, and celebrates the transformative potential of ecological uplift projects in fostering healthier, more vibrant communities.
Please stay tuned to our blog for more project updates once planting is completed this Spring. Click here to read more about Princeton Hydro’s robust natural resource management and restoration services.
Mark Gallagher, Vice President of Princeton Hydro, has been appointed to the Friends of Abbott Marshland Advisory Board.
The Abbott Marshlands is composed of 3,000 acres of wetlands and uplands located on the western edge of central New Jersey in Mercer County. It is the northernmost freshwater tidal marsh on the Delaware River and contains valuable habitat for many rare species like River Otter, American Eel, Bald Eagle, and various species of wading birds.
Unfortunately, this ecosystem has faced challenges partially due to the invasion of the aggressive Common Reed (Phragmites australis), causing substantial habitat loss and degradation. In response to these challenges, the Friends for the Abbott Marshlands have dedicated themselves to enhancing appreciation and protection of this precious ecosystem. Their mission focuses on engaging and inspiring a diverse community to experience the unique nature and history of the Abbott Marshlands. Their priorities involve expanding community involvement, advancing educational programs through the Tulpehaking Nature Center, enhancing organizational capacity, and working in cooperative stewardship efforts.
Since its inception, the Friends for the Abbott Marshlands have played a pivotal role in advocating for the preservation and stewardship of the marshlands. They've organized various educational programs, symposia, nature walks, and juried photography shows to raise awareness and encourage stewardship of this unique ecosystem. The Friends for the Abbott Marshlands Advisory Board meets periodically to advise on program design and execution, fundraising, and engagement in any and all activities related to the preservation of the Abbott Marshlands.
The area is named "Abbott Marshlands" in recognition of the important archaeological legacy of the marsh and of Charles Conrad Abbott, a 19th and early 20th century archaeologist and naturalist, who lived on the bluffs near the marsh and who wrote extensively about it.
Recognizing the urgent need to restore the Abbott Marshlands, Mercer County contracted Princeton Hydro to spearhead a multi-year, multi-phased restoration initiative. The project aimed at reducing and controlling the invasive Phragmites australis while increasing the presence of native marsh vegetation.
Princeton Hydro conducted a Floristic Quality Assessment to identify invasive areas and to establish a baseline for the restoration efforts. The team also performed hydrologic monitoring to understand tidal stage elevations. From 2018-2019, herbicide treatments were consistently conducted to combat the invasive phragmites. In the winter of 2019-2020, 46 acres of phragmites was cut and rolled with our Marsh Master using a modified steel roller attachment. The phragmites was then removed by raking, which in turn exposed the marsh plain’s substrate and seedbank to promote germination of the native marsh vegetation. Extensive areas of wild rice, mud plantain, broad leaved cattail, water purslane, pickerelweed, and arrow arum colonized the areas formerly overtaken by phragmites within the first growing season after the marsh plain was exposed. The project also includes the creation of 500 linear feet of living shoreline, a freshwater mussel bed, and a sustainable boat launch.
This comprehensive and collaborative restoration effort not only targets invasive species but also focused on enhancing biodiversity; improving recreational opportunities such as kayaking and bird watching; enhancing the overall visitor experience at John A. Roebling Memorial Park, which is part of Abbott Marshlands; and creating opportunities for community engagement and appreciation of this natural treasure.
Click here to learn how you can get involved with supporting and participating in initiatives aimed at protecting and cherishing the Marshlands for generations to come. To take a deeper dive into Princeton Hydro's work at Abbott Marshlands, click here.
A founding partner of Princeton Hydro, Mark is a pioneer in the field of restoration ecology, and helped get the conservation science movement off the ground in the 1980s. He holds a Bachelor of Science in Biology from Moravian College and Master of Science in Plant Ecology from Rutgers University. For more than two decades, Mark has overseen wetland and terrestrial ecology projects at Princeton Hydro, including many complex restoration projects that require unique solutions.
Mark, along with Princeton Hydro team members Dana Patterson and Michael Rehman, CERP, PWS and representatives from Mercer County and Friends of the Abbott Marshlands, led a educational course and field exploration of the Abbott Marshlands as part of the New Jersey Department of Environmental Protection (NJDEP) annual Youth Inclusion Initiative. Learn more here.
The New Jersey Department of Environmental Protection (NJDEP), U.S. Army Corps of Engineers (USACE), project partners, and elected officials broke ground on the interior cleanup of Liberty State Park in Jersey City (Phase 1A), marking a significant milestone in the history of New Jersey’s most visited state park.
During the groundbreaking ceremony, participants heard presentations from Commissioner of Environmental Protection Shawn M. LaTourette, USACE New York District Commander Colonel Alex Young, Assemblywoman Angela McKnight, and Assemblyman William B. Sampson IV.
As quoted in the press release distributed by the Murphy Administration, Commissioner LaTourette said, “Today’s groundbreaking is a critical step toward building a future at Liberty State Park that brings people and communities together to enjoy the environment we all share. Through the cleanup and restoration of nearly 235 acres, we will reckon with the industrial pollution of our past and from it, create a world-class outdoor urban environment that will be enjoyed by many future generations.” Click here to read the full press release.
A long history of industrial contamination (also called legacy pollution) has left 235 acres of Liberty State Park fenced-off and inaccessible to the public for decades. The groundbreaking ceremony marks the official start of Phase 1A of the clean up and restoration project.
Princeton Hydro was contracted by USACE New York District in partnership with the NJDEP Office of Natural Resource Restoration to design a resilient coastal ecosystem within 235 acres of this highly urbanized setting that provides both ecological and social benefits. This includes the restoration of over 80 acres of tidal and non-tidal wetlands and creation of several thousands of feet of intertidal shoreline and shallow water habitat hydrologically connected to the Upper New York Bay. When constructed, this will be one of the largest ecosystem habitat restoration projects in New Jersey.
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