ALDEN
30 Shrewsbury Street
Holden, MA 01520-1843 USA

phone: +1 508-829-6000
fax: +1 508-829-5939
e-mail: info@aldenlab.com

 

 

Environmental & Engineering Services

 
Biological field measurement services
 




 

 
Laboratory testing of intake screens
Our team provides extensive experience and capabilities in the development, design, evaluation, and construction of fish protection and passage facilities at all types of water intakes.

Team members are recognized in the industry and within regulatory agencies as leaders in developing innovative technologies and have been instrumental in resolving difficult issues related to the FERC hydroelectric licensing process and §316(b) requirements under the Clean Water Act.

The team has authored numerous authoritative documents on the subjects of fish protection technologies, fish entrainment/impingement, and turbine passage survival.
 

Alden’s Environmental and Engineering Services area is widely recognized as being highly effective in resolving flow related environmental issues associated with FERC and NPDES project licensing. Our scientists and engineers have designed, evaluated, and tested numerous fish protection systems for water intakes as well as upstream and downstream fish passage facilities at dams. The Group specializes in resolving O&M problems associated with fish protection needs such as debris management, icing, siltation, and head loss using extensive industrial experience combined with physical and computational flow modeling and testing. Alden’s solutions maximize the benefits received from the costs invested in meeting compliance.
 
Specific areas of expertise include:

 

  • CWA §316(b) technology assessments, including engineering, cost, and biological effectiveness evaluations
  • Strategic planning for §316(b) compliance
  • CWIS fish protection technology design, development, and evaluation
  • Upstream and downstream fish passage design and evaluation
  • Laboratory and field studies of fish protection and passage technologies
  • FERC licensing and NEPA compliance
  • Pilot studies
  • Hydroelectric entrainment and mortality studies
  • Theoretical turbine survival predictions
  • Hydraulic design and model studies
  • Resolution of O&M problems (e.g., icing, siltation, biofouling, and debris)
  • Fish-friendly hydro turbine design
  • Design, development, and testing of hydrokinetic technologies
     
   
"They are unbelievably knowledgeable about what's going on with respect to fish protection and fish passage work in North America. I'm amazed that they continue to grow, which to me is a strong testimonial to their broad appeal to many utilities or water users." - David Michaud, Senior Environmental Scientist, WE Energies