Protecting Natural and Biological Resources

The strategies we develop for our clients rely on the integration of our core competencies in FERC Hydro Permitting, fisheries biology, fisheries engineering, hydrology and hydraulic engineering, consulting, design, and research and development. Our engineers and scientists work closely together to ensure designs are biologically effective, feasible to construct, operate, and maintain, and are cost effective—all while meeting regulatory requirements and being mindful of location specific siting and cultural concerns. 

We take the time necessary to research the historical and current uses of your property to better understand known or potential impacts to environmental media including soil, groundwater, drinking water, surface water, sediments, and air. With this understanding, we can better help you understand the complexities of your project.


Our Services

Biological Resources

Providing healthy living landscapes that include botany, terrestrial, and aquatic wildlife.

Cultural Resources

Helping clients navigate the regulatory framework required for responsible stewardship of cultural resources.


Restoring wetlands, riparian, and aquatic systems in our coastal communities for a more sustainable and resilient future.

Fish Passage Design, Modeling, & Testing

For both upstream and downstream passage for a multitude of species.

Fish Protection Design, Modeling, & Testing

Research & Development, Evaluation, and Design of Fish Screening Facilities.

Fish Testing

For Biological and Engineering Performance.

Fisheries Engineering

For licensing and project permitting requirements.

Impact Assessment, Planning & Permitting

Helping our clients implement a permitting strategy, including the development of schedules and mitigation plans to expedite permitting and compliance.

Water Quality & Hydrology

Supporting innovative solutions with numeric modeling expertise for hydrologic, water quality, and environmental monitoring and reporting.

Water Quality & Hydrology (Marine)

Thoughtful and innovative planning to address the unique challenges associated with supplying water for beneficial use without adverse
impact to the environment or other legal water users.


Expertise in habitat assessment and mapping, wetlands jurisdictional line delineations, threatened and endangered species, mitigation planning, and design.

Recent Projects

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The historic 325-acre Fort DuPont site will eventually include a new residential community, ships and an entertainment center while preserving many former military buildings that date back to the 19th century. The Fort DuPont Redevelopment and Preservation Corp. plans to recreate the base as a waterfront community where residents can live amid – and in some cases in – renovated military buildings, and enjoy the close proximity of the Delaware River and the Chesapeake & Delaware Canal. Verdantas' engineers and scientists are providing traffic engineering, civil engineering, geotechnical engineering, permitting and construction review and testing.

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The master plan for Fort DuPont.
Civil Infrastructure | Natural Resources & Environmental Planning
Fort DuPont

Civil, traffic, geotechnical engineering, permitting and construction review and testing for the historic 325-acre residential community.

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Through funding made available by the U.S. Department of Energy, Alden conducted a series of studies to evaluate and optimize the design and operation of two modular and scalable fish bypass systems developed specifically to provide safe downstream passage of silver American Eels at hydropower projects. The goal of the studies was to address the need for biologically effective and less expensive downstream fish passage technologies for silver eels. The studies were developed specifically for this fish species and life stage due to population declines in many areas of its range and the potential for mortality to occur if eels migrating to the marine environment to spawn are entrained through hydro turbines during their journey to the sea. The large size and unique behaviors of silver eels have made it difficult for dam owners to implement downstream passage measures that are both biologically and cost effective, resulting in a need for new innovative technologies.

The studies conducted by Alden included a laboratory evaluation of the biological performance of the two bypass systems, a field evaluation of biological performance conducted with full-scale bypass systems installed at the intake of a small hydro project in New Hampshire, CFD modeling of the laboratory flume and field evaluation site, and a desktop assessment of the potential for application of each technology at hydro projects within the known range of American Eel and the expected benefits (i.e., biological and economic). Few organizations have the capabilities to conduct this array of technical studies, but Alden’s scientists and engineers have been using various combinations of these approaches and methods to develop and evaluate state-of-the-art fish passage and protection systems for nearly 50 years.

Assistance with the performance and completion of these studies was provided by Lakeside Engineering (bypass design and installation) and Blue Leaf Environmental (DIDSON acoustic camera and 3D acoustic telemetry services).


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The laboratory evaluation was conducted in a large re-circulating flume using the Klawa horizontal zig-zag eel bypass system and a vertical eel bypass system developed by Lakeside Engineering
Natural Resources & Environmental Planning
Modular and Scalable Downstream Passage for Silver American Eel

Read how Alden tested the effects of innovative downstream fish passage technologies with lab, CFD, and field analysis. Funded by the Department of Energy

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The Ohio Department of Natural Resources (ODNR) worked with the Verdantas team to restore a riparian wetland system along a portion of Murphy’s Run at Brooks Park on the southwest side of Buckeye Lake. Murphy’s Run and Buckeye Lake are both Ohio EPA 303(d) Listed Impaired Waters. Murphy’s Run, and the greater watershed contributing to Buckeye Lake, was impacted by sedimentation and nutrient loading, specifically high concentrations of phosphorus, in part caused by runoff from the surrounding landscape, which included active row crop farming and animal feeding operations, as well as residential developments within close proximity to Buckeye Lake.

Previous studies by Ohio EPA identified excessive sediment and phosphorus loadings into Buckeye Lake were attributed to its tributaries that include Murphy’s Run. The sediment and phosphorus loading of the shallow lake has led to frequent nuisance algal blooms capable of producing microcystin that in some cases resulted in temporary beach and water activity closures.

With funds secured through H2Ohio, ODNR contracted with our team to create wetlands and natural stream features as a component of a multi-faceted strategy for improving water quality and habitat in Murphy’s Run and Buckeye Lake. Our team was tasked with site characterization, survey, design, permitting, construction plan preparation, bidding activities, and construction oversight to meet the H2Ohio program goals of improving water quality. Construction was completed in June 2021.

Important project features include:

  • Creation of approximately 2.5 acres of quality wetland habitat.
  • Realignment of approximately 700 linear feet of Murphy’s Run.
  • Construction of an oversized pool in Murphy’s Run that will slow down the water flow and allow sediment to settle in the bottom of the pool before water enters the wetlands and realigned stream.
  • Installation of native trees, shrubs, grasses, and flowers.

 Project benefits include:

  • Better water quality and clarity in Buckeye Lake through the reduction of up to 362 pounds of nitrogen, 60 pounds of phosphorus, and 44 tons of sediment each year.
  • More stormwater storage capacity and treatment opportunities as stormwater moves through the wetlands areas, stream channel floodplain, and realigned stream channel.
  • Higher quality, native ecological community that is more diverse and resilient.
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Approximately 2.5 acres of quality wetland habitat with native trees, shrubs, grass was created
Natural Resources & Environmental Planning
Brooks Park Wetland Restoration | Buckeye Lake, Ohio

Using funds secured through H2Ohio, our team created wetlands and natural stream features to improve water quality and habitat

  • Since 2016, the Verdantas Team has consistently provided thorough, accurate, and timely plan reviews despite the pressures of fast-paced development in the community.

    Town Engineer Local Municipality, Delaware

  • Our municipality has utilized Verdantas as a consultant for capital projects involving the repair and replacement of its aging water and sewer infrastructure. They have provided initial engineering, design and construction management. The accuracy and thoroughness of their plans has resulted in capital projects that have consistently finished on time and within budget without unexpected change orders.

    Town Engineer Local Municipality, Delaware

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