Fish screening or by-pass devices are needed to prevent the loss of game fish or nongame fish that are classified as sensitive, threatened or endangered species by the Fish and Wildlife Commission.
Fish screens are necessary at both gravity and pumped water diversions.
Fish screening and bypass devices are often required depending upon water diversion flow rate or as a condition for a water right permit. Installation and maintenance of these devices is entirely the responsibility of the water diverter. Exemptions Fish screening or by-pass devices are not required in water diversions for which the Fish and Wildlife Commission has a contract or other form of agreement with the person diverting water who has made such other provision deemed adequate for the protection of fish. Cost Sharing Program ODFW encourages the installation of fish screening or by-pass devices in diversions less than 30 cfs. The water diverter or ODFW can construct and install the devices.