Representatives of federal, state and local agencies on Thursday announced the elimination of a 105-year-old barrier in a creek between Palo Alto and Menlo Park to allow endangered steelhead trout to migrate upstream from San Francisco Bay.
The project by the U.S. Environmental Protection Agency, the National Marine Fisheries Service, California State Coastal Conservancy and San Mateo County removed the concrete wall from San Francisquito Creek that was blocking most of the migrating native trout, EPA spokesman David Yogi said.
The barrier was placed in the creek in 1908 to protect the nearby historic El Palo redwood tree from flooding but prevented many juvenile steelhead from swimming upstream to spawn, said Brian Wardman, an engineer from West Sacramento-based Northwest Hydraulic Consultants who worked on the project.
The fish make the upstream swim from the bay each November, when water levels in the free-flowing creek are high due to seasonal rainfall, Mr. Wardman said.
Jared Blumenfeld, the EPA's Pacific Southwest regional administrator, said with the barrier gone, the steelhead, already a federally threatened species, will be free to move upstream from the bay to spawning and rearing grounds.
The unimpeded access to the creek, flowing east toward the bay from Searsville Dam in Portola Valley near Woodside, will improve prospects for the fish species, which have not been doing particularly well in the bay, Mr. Blumenfeld said.
"It is certainly going to point the indicators in the right direction," he said. "Things have been going down. Habitat loss, pollution, all those things continue to stress an already stressed population of steelhead."
"So this is sending the tide literally in the other direction," he said.
The project to extract the wall, called a "Bonde Weir," from the creek came about after the partnering government agencies together obtained $309,000, including a $75,000 grant from the EPA.