Earth Day Donation Drive:

“Follow Us” to Raise Money for American Rivers

In celebration of Earth Day, help Princeton Hydro donate to American Rivers!

For every new follower we collect on any of our social media channels between now and Earth Day (April 22, 2017), we’ll donate $.50 to American Rivers, an organization dedicated to protecting our precious water resources. Donations help to restore dammed rivers, protect wild rivers and revitalize river communities.

Support American Rivers by following our social media channels and spreading the word. You can find us on Twitter, LinkedIn, Facebook and Instagram.

 

 

Princeton Hydro Projects Recap

In Case You Missed It:
A Recap of Projects Recently Completed by the
Princeton Hydro Aquatic & Engineering Departments

Members of our New England Regional Office team conducted a detailed survey at a culvert prioritized for replacement in the Town of Stony Point, New York. This structure was one of several identified as important to both habitat and flood risk during the development of Stony Point’s Road-Stream Crossing Management Plan. The Princeton Hydro team will use the collected data to develop a conceptual design and implementation strategy for a replacement structure using the Stream Simulation design method developed by the U.S. Forest Service.

Special thanks to Paul Woodworth, Fluvial Geomorphologist, and Sophie Breitbart, Staff Scientist, for their excellent work on this project!

The Truxor was put to work dredging a pond in Union Gap, New Jersey. The Truxor is an extremely versatile amphibious machine that can perform a variety of functions, including weed cutting and harvesting, mat algae and debris removal, silt pumping, channel excavation, oil spill clean-up, and much more!

We recently designed and installed a solar-powered aeration system in Hillsborough, New Jersey. Solar pond and lake aeration systems are cost-effective, eco-friendly, sustainable, and they eliminate the need to run direct-wired electrical lines to remote locations. Princeton Hydro designs, installs and maintains various aeration and sub-surface destratification systems for public drinking water purveyors, municipal and county parks, private and public golf courses, and large lake communities throughout the East Coast.

Here’s a look at a project in Elizabeth, New Jersey to clear the area of phragmites. Phragmites is an invasive weed that forms dense thickets of vegetation unsuitable for native fauna. It also outcompetes native vegetation and lowers local plant diversity. Previously, the entire site was filled with phragmites. Late last year, we utilized the Marsh Master to remove the invasive weed. Now that its almost Spring, we’re back at the site using the Marsh Master to mill and cultivate the ground in preparation for re-planting native plant species. A big shout out to our Aquatic Specialist John Eberly for his great work on this project!

In this photo, our intern and engineering student currently studying at Stevens Institute of Technology, Veronica Moditz, is gathering data on the Hughesville Dam removal. She’s using GPS to check the elevation of the constructed riffle on the beautiful Musconetcong River.

Members of the Princeton Hydro team worked in South New Jersey doing annual maintenance on nine stormwater infiltration basins that were also designed and constructed by Princeton Hydro. The maintenance work involves clearing vegetation from the basins to ensure the organic matter does not impede infiltration of the water as per the basins’ design. This project also involves the management of invasive plant species within the basins. Stormwater infiltration basins provide numerous benefits including preventing flooding and downstream erosion, improving water quality in adjacent waterbodies, reducing the volume of stormwater runoff, and increasing ground water recharge.

We recently completed a project in New Jersey for which we used our Truxor machine to dredge a stormwater retention basin. The basin had accumulated large amounts of sediment which were impeding the flow of water into the basin. We equipped the Truxor with its standard bucket attachment and a hydraulic dredge pump. The dredging operation was a success and now the basin is clear and functioning properly.

Stay Tuned for More Updates!

Princeton Hydro Opens a New Office

We are pleased to announce the opening of our new Mid-Atlantic office located in Millersville, Maryland, allowing us to better serve existing and future clients throughout Maryland and Delaware. With the addition of this new location, Princeton Hydro now has five full-service offices from Maryland to Connecticut

For the past nine years Princeton Hydro, LLC has provided pond and lake management services to clients throughout Maryland and Delaware. We are now pleased to announce the official opening of our Mid-Atlantic office, located in Millersville, MD. From this strategic location we will be able to provide both existing and future clients in the Maryland and Delaware region with a full suite of services including but not limited to:

Over the past 20 years Princeton Hydro has become the recognized industry leader in the management and restoration of lakes and ponds. Our certified lake and pond managers are backed by a dedicated staff of water resource engineers, wetland scientists and fishery biologists who have the expertise and experience to solve even the most difficult lake and pond problems.

To commemorate the opening of our Maryland office, Princeton Hydro is extending discounted prices to new and existing clients in Maryland and Delaware for 2017 lake and pond management services. If you would like to schedule a no-cost, no-obligation site consultation, please contact Scott Churm, Director of Aquatic Operations, at schurm@princetonhydro.com.

We appreciate your business!

 

The Plight of Aging Dams, and One Solution

As dams age, the danger to life and property around them increases. If they were to suddenly fail and flood downstream communities and infrastructure, there would be serious loss of property and life. More and more, dam removal has become the best option for property owners who no longer want or can no longer afford the rising cost of maintenance and repair work required to maintain such a complex structure.

The Courier-Post recently published this Commentary piece titled, “The Plight of Aging Dams, and One Solution”, which was written by Princeton Hydro’s Vice President and Principal Engineer Geoffrey M. Goll:

Many of our nation’s dams, while originally intended to provide benefits for mills, water supply and energy generation, are severely aged and unmaintained. Nearly 20,000 of the dams on the Army Corps of Engineers’ National Inventory of Dams – which doesn’t even include many dams that are not inventoried or known about – were built in the 1960s. With expected lifespans of 50 years, these dams have reached their limit. And by 2020, 70 percent of all dams will be over 50 years old. Like roads and bridges, dams also require upkeep, maintenance and eventually removal or rehabilitation.

As dams age, the danger to life and property around them increases. If they were to suddenly fail and flood downstream communities and infrastructure, there would be loss of property and life. The Association of State Dam Safety Officials, the professional organization for dam safety engineering professionals and regulators, estimates there would need to be a $21 billion investment to repair just 2,000 deficient, high-hazard dams. More and more, the removal of dams has become an option for owners who no longer want or no longer can afford the rising cost of maintenance and repair work required to maintain such a complex structure.

For dams like this, removal benefits local economies, and eliminates threats to people and property in local communities. There are also many byproduct benefits, including restoring fish migration routes, improving water quality, restoring floodplain functions and values, and increasing biodiversity.

On Sept. 8, we had the honor of meeting the Secretary of the Interior Sally Jewell during a visit of our Hughesville Dam removal project on the Musconetcong River, located in northwestern New Jersey. This project exemplifies the successes that can be achieved through public-private partnerships, including local communities, state and federal agencies, nongovernmental organizations, and private commercial entities. This is the fifth dam removed on the Musconetcong River by a coalition of stakeholders, led by the Musconetcong Watershed Association. The Department of the Interior (specifically, the U.S. Fish and Wildlife Service) provided funding to remove this very old, out-of-compliance dam.

The success of these partnerships is due to the unique strengths that each organization brings to the table. This project achieved the removal of a flood and safety hazard, and will restore additional river miles for migratory fish, improve water quality by removing the heat sink of the reservoir, and provide additional safe passage for recreation along the river.

It is easy to see why Secretary Jewell chose this site to visit, but the old and outdated dam at Hughesville is far from alone. Across the nation, we need to remove dams like this at a much larger scale – aging dams that no longer are of value to us, but increase the danger to those who live downstream. If we can build on this momentum and start to address the issue of dam safety compliance on a national scale, we can address these threats to American’s safety and strengthen local economies.

Success Spotlight: Strawbridge Lake

The Princeton Hydro team recently completed a spadderdock removal project at Strawbridge Lake, a 33-acre lake considered to be one of the most valuable open space assets in Moorestown, New Jersey.

Spadderdock is an invasive aquatic plant found in lakes and ponds throughout the Eastern US. It can grow quickly and reach large populations totally covering the water surface and shading the bottom so that nothing else can grow. Spadderdock can eliminate important, native plant species and clog waterways.

Princeton Hydro utilized its Truxor DM 5045, an eco-friendly amphibious machine, to dig up the plants at their roots and remove them from the lake. Check out the below before and after photos to see the dramatic transformation. Special kudos to our Senior Scientist J.P. Bell for a job well done! Read more about pesticide-free #lakemanagement solutions!

Four Ways Climate Change Could Affect Your Lake

The Local Effects of Climate Change Observed Through our Community Lakes

Climate change is an enormous concept that can be hard to wrap your head around. It comes in the form of melting ice caps, stronger storms and more extreme seasonal temperatures. If you’re an avid angler, photographer, swimmer, boater or nature enthusiast, it’s likely that because of climate change you’ll bear witness to astonishing shifts in nature throughout the greater portion of your lifetime. This is especially true with respect to lakes.

2015-07-07-10-01-20Lakes are living laboratories through which we can observe the local effects of climate change in our own communities. Lake ecosystems are defined by a combination of various abiotic and biotic factors. Changes in hydrology, water chemistry, biology or physical properties of a lake can have cascading consequences that may rapidly alter the overall properties of a lake. Most of the time the results are negative and the impacts severe. Recognizing and monitoring the changes that are taking place locally brings the problems of climate change closer to home, which can help raise awareness and inspire environmentally-minded action.

Princeton Hydro has put together a list of four inter-related, climate change induced environmental impacts that can affect lakes and lake communities:

1. Higher temperatures = shifts in flora and fauna populations

The survival of many lake organisms is dependent on the existence of set temperature ranges and ample oxygen levels. The amount of dissolved oxygen (DO) present in a lake is a result of oxygen diffusion from the atmosphere and its production by algae and aquatic plants via photosynthesis. An inverse relationship exists between water temperature and DO concentrations. Due to the physical properties of water, warmer water holds less DO than cooler water.

This is not good news for many flora and fauna, such as fish that can only survive and reproduce in waters of specific temperatures and DO levels. Lower oxygen levels can reduce their ability to feed, spawn and survive. Populations of cold water fishes, such as brown trout and salmon, will be jeopardized by climate change (Kernan, 2015).

358-001-carp-from-churchvilleAlso consider the effects of changing DO levels on fishes that can tolerate these challenging conditions. They will thrive where others struggle, taking advantage of their superior fitness by expanding their area of colonization, increasing population size, and/or becoming a more dominant species in the ecosystem. A big fish in a little pond, you might say. Carp is a common example of a thermo-tolerant fish that can quickly colonize and dominate a lake’s fishery, in the process causing tremendous ecological impact (Kernan, 2010).

2. Less water availability = increased salinity

Just as fish and other aquatic organisms require specific ranges of temperature and dissolved oxygen to exist, they must also live in waters of specific salinity. Droughts are occurring worldwide in greater frequency and intensity. The lack of rain reduces inflow and higher temperatures promote increased evaporation. Diminishing inflow and dropping lake levels are affecting some lakes by concentrating dissolved minerals and increasing their salinity.

Studies of zooplankton, crustaceans and benthic insects have provided evidence of the consequences of elevated salinity levels on organismal health, reproduction and mortality (Hall and Burns, 2002; Herbst, 2013; Schallenberg et al., 2003). While salinity is not directly related to the fitness or survival rate of all aquatic organisms, an increase in salinity does tend to be stressful for many.

3. Nutrient concentrations = increased frequency of harmful algal blooms

Phosphorus is a major nutrient in determining lake health. Too little phosphorus can restrict biological growth, whereas an excess can promote unbounded proliferation of algae and aquatic plants.

before_strawbridgelake2If lake or pond water becomes anoxic at the sediment-water interface (meaning the water has very low or completely zero DO), phosphorus will be released from the sediment. Also some invasive plant species can actually “pump” phosphorus from the sediments and release this excess into the water column (termed luxurious uptake). This internally released and recycled sedimentary phosphorus can greatly influence lake productivity and increase the frequency, magnitude and duration of algae blooms. Rising water temperatures, declining DO and the proliferation of invasive plants are all outcomes of climate change and can lead to increases in a lake’s phosphorus concentrations and the subsequent growth and development of algae and aquatic plants.

Rising water temperatures significantly facilitate and support the development of cyanobacteria (bluegreen algae) blooms. These blooms are also fueled by increasing internal and external phosphorus loading. At very high densities, cyanobacteria may attain harmful algae bloom (HAB) proportions. Elevated concentrations of cyanotoxins may then be produced, and these compounds seriously impact the health of humans, pets and livestock.

rain-garden-imagePhosphorus loading in our local waterways also comes from nonpoint sources, especially stormwater runoff. Climate change is recognized to increase the frequency and magnitude of storm events. Larger storms intensify the mobilization and transport of pollutants from the watershed’s surrounding lakes, thus leading to an increase in nonpoint source loading. Additionally, larger storms cause erosion and instability of streams, again adding to the influx of more phosphorus to our lakes. Shifts in our regular behaviors with regards to fertilizer usage, gardening practices and community clean-ups, as well as the implementation of green-infrastructure stormwater management measures can help decrease storm-related phosphorus loading and lessen the occurrence of HABs.

4. Cumulative effects = invasive species

A lake ecosystem stressed by agents such as disturbance or eutrophication can be even more susceptible to invasive species colonization, a concept coined “invasibility” (Kernan, 2015).

For example, imagine that cold water fish species A has experienced a 50% population decrease as a result of warming water temperatures over ten years. Consequently, the fish’s main prey, species B, has also undergone rapid changes in its population structure. Inversely, it has boomed without its major predator to keep it in check. Following this pattern, the next species level down – species B’s prey, species C – has decreased in population due to intense predation by species B, and so on. Although the ecosystem can potentially achieve equilibrium, it remains in a very unstable and ecologically stressful state for a prolonged period of time. This leads to major changes in the biotic assemblage of the lake and trickle-down changes that affect its recreational use, water quality and aesthetics.

• • •

Although your favorite lake may not experience all or some of these challenges, it is crucial to be aware of the many ways that climate change impacts the Earth. We can’t foresee exactly how much will change, but we can prepare ourselves to adapt to and aid our planet. How to start? Get directly involved in the management of your lake and pond. Decrease nutrient loading and conserve water. Act locally, but think globally. Get out and spread enthusiasm for appreciating and protecting lake ecosystems. Also, check out these tips for improving your lake’s water quality.


References

  1. Hall, Catherine J., and Carolyn W. Burns. “Mortality and Growth Responses of Daphnia Carinata to Increases in Temperature and Salinity.” Freshwater Biology 47.3 (2002): 451-58. Wiley. Web. 17 Oct. 2016.
  1. Herbst, David B. “Defining Salinity Limits on the Survival and Growth of Benthic Insects for the Conservation Management of Saline Walker Lake, Nevada, USA.” Journal of Insect Conservation 17.5 (2013): 877-83. 23 Apr. 2013. Web. 17 Oct. 2016.
  1. Kernan, M. “Climate Change and the Impact of Invasive Species on Aquatic Ecosystems.” Aquatic Ecosystem Health & Management (2015): 321-33. Taylor & Francis Online. Web. 17 Oct. 2016.
  1. Kernan, M. R., R. W. Battarbee, and Brian Moss. “Interaction of Climate Change and Eutrophication.” Climate Change Impacts on Freshwater Ecosystems. 1st ed. Chichester, West Sussex, UK: Wiley-Blackwell, 2010. 119-51. ResearchGate. Web. 17 Oct. 2016.
  1. Schallenberg, Marc, Catherine J. Hall, and Carolyn W. Burns. “Consequences of Climate-induced Salinity Increases on Zooplankton Abundance and Diversity in Coastal Lakes”Marine Ecology Progress Series 251 (2003): 181-89. Inter-Research Science Center. Inter-Research. Web. 17

Stormwater Projects in Action

Improving Barnegat Bay through Green Infrastructure and Stormwater Management

FREE BROCHURE DOWNLOAD

American Littoral Society, Ocean County Soil Conservation District and Princeton Hydro recently held a Stormwater Projects in Action workshop. The workshop focused on a number of 319(h) funded projects designed by Princeton Hydro and implemented by American Littoral Society in the Long Swamp Creek/Lower Toms River sub-watersheds of Barnegat Bay. Those projects exemplified how green infrastructure techniques could be used to retrofit, upgrade and compliment standard stormwater management methods. This included the restoration of healthy soils and the construction/installation of bioretention basins, rain gardens, porous pavement, and sub-surface Manufactured Treatment Devices (MTDs).

Event participants learned about the problems affecting Barnegat Bay due to over-development and improper stormwater management. They were presented with examples of the types of green infrastructure solutions that can be implemented in any setting in order to achieve cleaner water and less flooding.

A brochure detailing each of the projects and providing an in-depth look at the incredible work being done to save Barnegat Bay was distributed to event attendees. You can download your free copy here:

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Princeton Hydro President Dr. Stephen Souza gave two presentations at the event. The first presentation explored the Matrix Scoring Tool that Princeton Hydro’s Senior Environmental Scientist Paul Cooper along with Dr. Souza developed to quantitatively evaluate the relative benefit of conducting one stormwater project versus another in a particular area. The 2nd presentation provided an overview of the five stormwater improvement projects that Princeton Hydro conducted as part of the $1,000,000 319(h) grant secured for American Littoral Society. If you’re interested in receiving a copy of either presentation, submit a comment below or email us.

Clean water is fundamental to all life.

 

 

Enjoy Your Labor Day Adventures Responsibly

Princeton Hydro Offers
Seven Tips for Environmentally-Friendly Outdoor Fun

 

Labor Day is right around the corner! Many people will soon be packing up the car with fishing gear, and heading to their favorite lake for a fun-filled weekend.

As biologists, scientists and outdoor enthusiasts, all of us at Princeton Hydro fully enjoy getting outside and having fun in nature. We also take our responsibility to care for and respect our natural surroundings very seriously. We play hard and work hard to protect our natural resources for generations to come.

These seven tips will help you enjoy your Labor Day fishing, boating and outdoor adventures with minimal environmental impact:

  • Before you go, know your local fishing regulations. These laws protect fish and other aquatic species to ensure that the joys of fishing can be shared by everyone well into the future.
  • Reduce the spread of invasive species by thoroughly washing your gear and watercraft before and after your trip. Invasives come in many forms – plants, fungi and animals – and even those of microscopic size can cause major damage.
  • Stay on designated paths to avoid disrupting sensitive and protected areas, like wetlands, shorelines, stream banks and meadows. Disturbing and damaging these sensitive areas can jeopardize the health of the many important species living there.
  • Exercise catch and release best practices. Always keep the health of the fish at the forefront of your activities by using the right gear and employing proper techniques. Get that info by clicking here
  • Use artificial lures or bait that is native to the area you’re fishing in. Live bait that is non-native can introduce invasive species to water sources and cause serious damage to the surrounding environment.
  • Plan ahead and map your trip. Contact the office of land management to learn about permit requirements, area closures and other restrictions. Use this interactive map to find great fishing spots in your area, the fish species you can expect to find at each spot, nearby gear shops, and more!

Armed with these seven tips, you can now enjoy your weekend while feeling rest assured that you’re doing your part to protect the outdoor spaces and wild places we all love to recreate in! Go here to learn about some of the work Princeton Hydro does to restore and protect our natural resources.

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“Respect nature and it will provide you with abundance.”

–compassionkindness.com

Princeton Hydro’s Conservation Spotlight

AMERICAN LITTORAL SOCIETY: SAVING BARNEGAT BAY

This Conservation Spotlight explores and celebrates
the American Littoral Society’s efforts to save Barnegat Bay

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Barnegat Bay stretches 42-miles, primarily along the inner-coast of Ocean County, New Jersey. The “Bay” is nationally recognized as a unique estuarine ecosystem with a variety of different habitats that many species depend on for survival. Due to numerous factors, but especially the development of its watershed and resulting high levels of nitrogen loading from stormwater runoff, the Bay has suffered serious ecological decline.

In an effort to save the Bay, the American Littoral Society developed a multi-faceted Clean Water Project plan, which focuses heavily on one of the Bay’s key issues: eutrophication due to excessive nitrogen loading. In partnership with Princeton Hydro, the Ocean County Soil District and others, American Littoral Society began work to decrease the volume of stormwater runoff and associated pollutants flowing into and damaging the Bay.

Screen Shot 2016-08-22 at 11.58.17 AMIn 2013, American Littoral Society, with assistance provided by Princeton Hydro, successfully secured $1,000,000 in 319(h) implementation funding through the New Jersey Department of Environmental Protection. American Littoral Society then developed an innovative basin ranking matrix. The matrix, created by Princeton Hydro, provides a non-biased, quantitative means of identifying and ranking stormwater management projects having the greatest potential to decrease pollutant loading to the Bay.

With funding secured and a prioritization methodology in place, American Littoral Society then began its work to retrofit antiquated, inefficient stormwater basins throughout the Barnegat Bay watershed. The goal was to reduce runoff through upgraded stormwater management systems emphasizing the application of green infrastructure techniques.

American Littoral Society and Princeton Hydro along with key partners implemented a variety of green infrastructure projects to treat stormwater at its source while delivering environmental, social and economic benefits to Barnegat Bay. Completed projects include:

  • 2 Years After Planting was Completed: Laurel Commons, Carnation Basin RetrofitConversion of standard, grassed detention basins into naturalized bio-retention basins, as exemplified by the Laurel Commons Carnation Circle Basin, which now serves as a paradigm for the cost-effective retrofitting of aged, traditional detention basins
  • At Toms River High School North, the installation of tree boxes,
  • At the Toms River Board of Education offices, the replacement of conventional paving with permeable pavement,
  • At multiple sites, the construction of rain gardens,
  • At Toms River High School North, the construction/installation of stormwater management Manufactured Treatment Devices (MTDs)
  • At the Toms River Community Medical Center (RWJ Barnabas Health), the construction of a bio-retention/infiltration basin

Education and outreach have also been key factors in improving the condition of the Bay, including training seminars for engineers, planners and code officials on basin conversion and management of green infrastructure; educational materials and signage; and public involvement in volunteer clean-ups, lawn fertilizer usage reduction, and rain garden and basin planting.  

Through its work with key partners, like Princeton Hydro, and countless volunteers, the American Littoral Society has made notable progress in Barnegat Bay, but much more needs to be done to restore and protect this unique ecosystem. Join the cause to help save Barnegat Bay; contact the American Littoral Society to find out how you can make a difference. 

For a detailed review of each project and an in-depth look at the incredible work being done to save Barnegat Bay, go here and download our brochure.

About the American Littoral Society: The American Littoral Society, founded in 1961, promotes the study and conservation of marine life and habitat, protects the coast from harm, and empowers others to do the same.

Truxor DM 5045 – The Newest Addition to the Princeton Hydro Family

Truxor DM5045 Stock Image We’re thrilled to announce the arrival of our new Truxor DM 5045!

This multi-functional, eco-friendly, amphibious machine effectively controls invasive weeds and problematic algae growth without the use of pesticides.

Its light-weight construction and highly advanced weight distribution system provide low ground pressure and high floating capacity. This allows the Truxor to operate on water, in deep or very shallow depths, and on dry land without disrupting sensitive environments, like nature preserves, wetlands, canal banks, golf courses and areas that are difficult to access with conventional equipment. And, the Truxor’s highly maneuverable and precise control system ensures easy passage through narrow channels and around hazards.

Equipped with a wide range of tools and accessories, the Truxor DM 5045 can perform a variety of functions, including weed cutting and harvesting, mat algae and debris removal, silt pumping, dredging, channel excavation, oil spill clean-up and much more!

This is the second Truxor to be welcomed to the Princeton Hydro family, which also includes a Marsh Master, another versatile, fully amphibious vehicle. Watch our Truxor DM 5000 in action.

If you’re interested in learning more about our innovative lake and pond management techniques or wondering if the Truxor is the right tool for one of your projects, please contact us!