• For over 100 years

    ALDEN has been a recognized leader

    in the field of applied fluid dynamic consulting. We use this expertise to support the World’s environmental and energy future through independent evaluation and optimization of new and existing technologies; providing practical value-added solutions to industry and government agencies; delivering a quality product that meets or exceeds our client’s expectations; developing staff to be company and industry leaders; and using our staff’s expertise to help shape regulations that are relevant to our clients.

Latest Feed

  • 316(b) Rule Published in Federal Register on August 15, 2014

    The purpose of this action is to reduce impingement and entrainment of fish and other aquatic organisms at cooling water intake structures used by certain existing power generation and manufacturing facilities for the withdrawal of cooling water from waters of the United States. This rule establishes requirements under section 316(b) of the Clean Water Act (CWA) for existing power generating facilities and existing manufacturing and industrial facilities that are designed to withdraw more than 2 million gallons per day (mgd) of water from waters of the United States and use at least 25 percent of the water they withdraw exclusively for cooling purposes. These national requirements, which will be implemented through National Pollutant Discharge Elimination System (NPDES) permits, apply to the location, design, construction, and capacity of cooling water intake structures (CWIS) at regulated facilities and provide requirements that reflect the best technology available (BTA) for minimizing adverse environmental impact.

  • Celeste N. Fay, Senior Project Engineer at Alden, receives the Women with HydroVision award for Environmental Protection and Mitigation

    TULSA - The PennWell Hydro Group is pleased to announce the inaugural class of recipients of the Women with Hydro Vision award. This award program is designed to honor the most influential women in the hydropower industry. As the hydroelectric power industry is rather diverse, the market was divided into 10 separate categories. Celeste N. Fay,Senior Project Engineer at Alden, received the Women with HydroVision award for Environmental Protection and Mitigation.

  • The Hydraulic Zone of Influence of an Operating Oil and Gas Platform Cooling Water Intake

  • Washington State’s Mercer Island Tunnel Ventilation Nozzle

Featured Article:  White Water Kayak Park


A whitewater kayaking park on the Chattahoochee River modeled by Alden is now complete. A 1:12 scale physical hydraulic model was used to develop the design for the “finale” of the course which includes both stationary and adjustable wave-shapers.

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