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Geiger 316b Screens

The final Environmental Protection Agency (EPA) 316(b) rule was signed with the goal of protecting aquatic life in our lakes and rivers. It will affect 1,065 existing facilities (544 power facilities and 509 manufacturers) in the USA. The rule applies to existing facilities that withdraw more than 2MGD (315 m³/h) of water and use at least 25% of this water for cooling purposes. Furthermore, renewing an NPDES (National Pollutant Discharge Elimination System) permit requires 316(b) compliance.

Unique Selling Point

Existing facilities have six options to consider implementing in order to comply with 316(b). They are:
  • Operating a closed cycle system. This involves the use of cooling towers and is one of the most expensive options available.
  • Operating a centre-flow system that has a maximum through-screen design intake velocity of 0.5 feet per second (fps) (0,15 m/s). Johnson® Offshore Intake Systems and Geiger® Centre Flow Travelling Band Screens comply.
  • Operating an offshore velocity cap – this has to already exist and be at least 800 (243.84m) feet off shore. This could be an option for limited facilities using seawater.
  • Operating a modified travelling screen that the EPA or state regulators have deemed meets the final rule and is the best available technology (BAT) for impingement reduction. Geiger MultiDisc® solutions comply
  • Implementing a combination of technologies. This is a costly solution with multiple stages of equipment used.
  • Achieving the specified impingement reduction by other means – this approach requires significant engineering and study requiring a 12 month impingement mortality demonstration to meet the specified minimum rates of mortality. An expensive and risky option.


At Aqseptence Group, we recognized the need for 316(b)-conform solutions at an early stage. Hence, the innovative Geiger MultiDisc®, Johnson® Offshore Intake Systems and the Geiger® Centre-Flow Travelling Band Screens all offer solid solutions and economical options that comply with the American EPA’s 316(b) regulations. For more information on the EPA's 316b rule see below.
For more information also see, Johnson Screens® Flat Panel Fish Diversion Screens.


Locations and Contact


Aqseptence Group GmbH, Karlsruhe

Sales and Manufacturing Location
Hardeckstrasse 3
76185 Karlsruhe

Tel: +49 721 5001 0

Fax: +49 721 5001 213


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