FISHBIO is well-equipped to provide biological monitoring services for a wide range of construction, development, and maintenance projects. Our staff worked with lead biologist Mike McGowan aboard the hopper dredge Essayons to help the U.S. Army Corps of Engineers to monitor potential impacts of dredging on Delta fishes, especially longfin smelt (Spirinchus thaleichthys). FISHBIO technicians monitored the catch of fish during dredging activities according to monitoring plan protocols, including identifying and measuring all fishes collected. We maintained written records, collected photographs and specimens, and adhered to ship safety protocols. Species encountered included bay goby, northern anchovy, speckled sanddab, and Dungeness crab.