Projects> Kaiser Pond and Shinn Pond Passage Retrofit

Kaiser Pond and Shinn Pond Fish Passage Retrofit

Alameda County, CA

Biological Services, Environmental Planning & Compliance, Storm Water Services

Sequoia provided biological compliance support for two Alameda County Water District (ACWD) projects in the Alameda Creek Drainage near Fremont, California: Kaiser Pond and Shinn Pond. Sequoia’s team of biologists conducted preconstruction surveys for initial ground disturbance, monitored construction activities to ensure compliance, and performed multiple fish relocations for the project.

The Kaiser Pond project included construction of a new diversion pipeline and cylindrical fish screen that replaced the prior unscreened diversion. The fish screen system consisted of one self-cleaning cylindrical screen with a track system on a concrete pad along the bank of the Alameda Creek Flood Control Channel that prevents juvenile steelhead trout from being trapped in Kaiser Pond. The screen system and diversion intake are used to divert water from the Alameda Creek Flood Control Channel to Kaiser Pond. This project included extensive excavation, horizontal directional drilling, fish relocations, focused species surveys, and implementation of project specific Best Management Practices (BMPs) for storm water management.


The Shinn Pond project included the installation of a new 54-inch gravity re-diversion pipeline with an intake structure in the bank of Shinn Pond, along with a flow metering vault, an isolation gate vault, and an outlet structure into Stevenson Pond. A new pipeline was installed underneath active Union Pacific Railroad and Bay Area Rapid Transit (BART) tracks, located by the Quarry Lakes adjacent to the Rancho Arroyo Park in the city of Fremont. Sequoia ensured compliance with the terms of the California Department of Fish and Wildlife (CDFW) Lake and Streambed Alteration Agreements and the U.S. Army Corps of Engineers (USACE) 404 Permit, with a scope of work that covered biological resources, water quality, and erosion control.