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The Office of Councilmember Patrick O'Donnell and the Department of Parks, Recreation and Marine will conduct a ribbon cutting ceremony for the reconstructed El Dorado Nature Center streams on Saturday, March 20 at 10 a.m. at El Dorado Nature Center, 7550 E. Spring Street. The public will be able to enjoy the walking trails adjacent to the stream that were closed during construction.
Created in 1969, El Dorado Nature Center is a 102-acre environmental, educational, and recreation center. The Center contains two lakes connected by a ½-mile long stream. Over the last 40 years vegetation had shaded and clogged the stream. Storms eroded the banks and deposited silt on the stream bottom along with decayed leaves and branches, causing the stream to become shallower, and wider. This condition did not provide healthy aquatic or riparian habitat and eroded the walking trail. The restoration project reconstructed the man made stream using innovative bioengineering techniques and self-sustaining systems that will prevent future erosion and bank degradation. The project represents the first phase of the El Dorado Nature Center Master Plan.
The Restoration Design Group (RDG), stream restoration consultants in Berkeley, CA, developed plans for the design-build project. Mike Bubalo Construction Co., Inc., implemented the five-month restoration in collaboration with RDG and Parks, Recreation and Marine staff. The stream restoration used sustainable bioengineering techniques, including the use of live willow poles and stakes and coir fabric blankets. Rather than installing "hard" structures such as concrete, "soft" structures emulating processes present in natural streams were used. Incorporating an understanding of natural stream flows and using plants and boulders to direct those flows will help prevent future erosion. Exotic and invasive vegetation in the stream corridor has been removed and native riparian vegetation is being planted, creating a more appropriate southern California ecosystem and reducing future maintenance. The five pedestrian bridges that cross the stream have also been replaced.
The Nature Center stream restoration was funded by grants under the Safe Neighborhood Parks, Clean Water, Clean Air, and Coastal Protection Bond Acts of 2000 and 2002, and mitigation paid by McDonnell Douglas for violations under the Clean Water Act.
For more information about the El Dorado Nature Center Stream Restoration project ribbon cutting ceremony, please call (562) 570-3165.
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