Giacomini Wetland Restoration Project: Summary of Construction Under Phase I and II: What Was Done to Minimize Impacts to Threatened and Endangered Species?

Photos of a California black rail on the left (photo by Danika Tsao, USGS) and a tidewater goby in a water-filled plastic bag on the right.

(L) California black rail; (R) Federally endangered tidewater goby from Giacomini Ranch.

Construction in areas such as Tomales Bay, which is home to many threatened and endangered species, required careful coordination between Park Service biologists, the construction manager, and the construction contractor. During both years, the Park Service provided oversight for environmental monitoring, ensuring that impacts to wetlands and other key habitats were minimized; proper erosion control and pollution prevention measures were implemented or installed; and all work areas were surveyed and cleared of special status species prior to construction.
Park Service staff clear tidewater goby and other fish from drainage ditches prior to filling

Park Service staff clear tidewater goby and other fish from drainage ditches prior to filling.

Construction contractors were required to adhere to strict timelines on when construction could start to ensure that most of the breeding season for particular special status species was complete. Construction areas had to be "cleared" or surveyed prior to start of individual construction components according to specific species protocols. Clearance surveys were either performed in-house by Park Service biologists or by contractors such as Avocet Research Associates (Point Reyes Station, CA) and Leslie Wood Consulting. In addition, for certain areas and activities, biologists needed to be on-site during construction to clear or survey for species.

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