Fish screens and fish passage improvement projects complement other infrastructure modernization efforts by preventing fish from entering distribution and irrigation infrastructure and by allowing fish easier passage along waterways for migration, spawning, and rearing. Davids Engineering has worked with several clients to design effective, low maintenance fish passage improvements that benefit all fish, including federally-listed Chinook salmon and Steelhead. Designs have included the installation of new linear, flat-plate fish screens and fish bypass returns that significantly reduce maintenance, monitoring, and the need for manually rescuing and returning trapped fish to waterways. We have also modified fish ladders to allow easier migration around dams and other water impoundment facilities. Our retrofit designs of existing diversion facilities protect fish populations from entrapment and entrainment, while also improving the accuracy, precision, and timing of irrigation diversions by our clients.