As the warm sunshine draws you outside, you may be tempted to do some fishing—it is a social distanced approved activity, after all. Depending on where you drop your lure, you can likely thank fish passage and fish protection efforts for making your leisurely day of casting possible. A group of dedicated experts, including some of Alden's own, work to keep many fish habitats vibrant through the design and implementation of new and improved fish passage and fish protection technologies. 

In this newsletter edition, we give you a behind the scenes look at one of these fish passage systems. Plus, catch up on some other non-fish related tidbits brought to you by our industry experts.

Read on, stay safe, and let us know if you have a topic you really want us to cover. 


Starting this month, our biologists and engineers will be using our large flume fish testing facility to evaluate a volitional entry system design for fish passage. EPRI and its project partners are funding this research. One of the goals of the study is to test the system for its ability to pass river herring into a Whooshh tube for upstream transport.

Unfortunately due to the COVID-19 outbreak, the first phase of this multi-phased testing effort was put on hold until next spring. But before that happened, we were able to get a first-hand look at the field set-up, thanks to this video.

Watch it now


Take advantage of desk time later this summer with this ASCE webinar: The Integration of Computational Fluid Dynamics (CFD) Modeling Tools in Water Treatment Plant Design.

Learn about the proper use of CFD in predicting field component performance, along with the benefits of integrating this powerful tool into your design process.

Stu Cain, Ph.D., President at Alden will be the course instructor. The event is sponsored by ASCE Continuing Education and ASCE's Environmental & Water Resources Institute (EWRI).

Register Now

Wet Stack with and without LCS-5-1

Imagine walking out to your vehicle after a hard day's work only to find it covered in grime like this—every day.  Don't blame these spots on the weather or a flight of migrating birds. Instead, the culprit is the subject of our latest case study published on our blog. In it, you'll see more examples that illustrate the importance of a properly designed liquid collection system.

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Our experts addressed even more frequently asked questions in our Wet Stack Design FAQ. The article helps to answer your most common concerns regarding wet stack modeling and design. Check it out or contact us if you have a more specific question.

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We want to give a virtual shout-out to Whooshh for providing us with some much needed levity in an otherwise trying time. When one of your products gets affectionately dubbed the "salmon cannon," you rolled with it and laughed along. For that, we thank you. And we look forward to more. 

If you need a chuckle, we recommend visiting their "just for fun" video section on their website. 

Watch Now


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