After acquiring the 250-acre McCosker parcel in 2011, the East Bay Regional Park District identified the ecologically-rich habitat of the McCosker Stream as a priority restoration and public access improvement project.

Why does this project matter?

The project restores the natural ecology of the site, providing upstream migration access for native rainbow trout, and also supports recreational uses at the park, including an access road and parking area, creek crossings, and necessary utilities.

What is ESA doing to help?

Our landscape architecture, civil engineering, and permitting teams collaborated on this project to meet the client’s expectations, budget, and schedule. To address the habitat restoration goals, the team excavated fill material, daylighted the creek channel, and constructed in-stream and near-stream enhancements along the 1,900-foot-long creek channel that connects to Upper San Leandro Creek.

The team designed new recreation amenities that improved access and increased the District’s trail connectivity amongst their parks, including a new staging and trailhead facility that provides pedestrian and backpacker access to the trail network. A new accessible trail meanders along the restored creek from the staging area to a group camp area that features a picnic shelter, fire pit, open space for tent sites, and restroom facilities.

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Client East Bay Regional Park District

Location Oakland, CA

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