Visitors to the park should expect added traffic, and to see a lot of dirt being brought in: on the order of about 200,000 cubic yards, he said. That could translate to up to 25 trucks an hour, intermittently, over the summer months in the coming two years. There also may be temporary trail closures at the park.
"We're trying to make people aware of what's going on and why," he said.
The reason the project was delayed from its expected start date last summer, he said, is that it requires a large amount of uncontaminated soil, and there was none available that could be sourced locally that met the rigorous quality standards of the U.S. Fish & Wildlife Service.
Project coordinators have worked to claim soil from nearby development projects requiring excavation, claiming it from basement digs to transplant into the Bay.
Much of the dirt being generated from development excavations has low levels of different contaminants like pesticides, herbicides or hydrocarbons, he said. The soil standards used for putting the soil into the Bay are high because the soil will be used in an environmentally sensitive habitat: the Don Edwards San Francisco Bay National Wildlife Refuge.
The project will raise a number of levees along Bayfront Expressway, which will be part of the Bay Trail and publicly accessible. Farther out into the Bay, other levees will be breached.
In addition, there will be educational features added and a new park entry near the Chilco Street-Bayfront Expressway intersection on the Bay side.
While this project is focused more on marsh restoration than flood protection, Bourgeois said that he has worked closely with the San Francisquito Creek Joint Powers Authority to make sure all of the changes will either maintain the current status of — or improve the conditions for —flood control along the Bay.
Historically, many of the levees along the Bay were berms built by Cargill, Inc., to keep water inside the ponds for salt manufacturing purposes, rather than for flood protection, he noted.
This story contains 389 words.
Stories older than 90 days are available only to subscribing members. Please help sustain quality local journalism by becoming a subscribing member today.
If you are already a subscriber, please log in so you can continue to enjoy unlimited access to stories and archives. Subscriptions start at $5 per month and may be cancelled at any time.