Stream Stabilization and Restoration

Related Projects

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  Elmhurst Creek Realignment and Restoration

  Alameda County, California

  

  Elmhurst Creek Realignment and Restoration

  Alameda County, California

  On behalf of Monterey Mechanical, a property owner along a section of Elmhurst Creek subject to periodic flooding, Northgate conducted environmental and geotechnical investigations and coordinated the CEQA permitting for this creek realignment, habitat restoration and bridge replacement project. Northgate worked with the U.S. Corps of Engineers, the Regional Water Quality Control Board, the City of Oakland and the Design Team to develop the realignment and restoration plan and obtained agency approval. Debris was removed from the channel, the creek was dredged, channel reshaped and realigned to eliminate the flood potential. Northgate monitored and supervised the riparian habitat maintenance for a post-contraction period of five years.

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  Ardenwood Creek Restoration and Flood Control

  Alameda County, California

  

  Ardenwood Creek Restoration and Flood Control

  Alameda County, California

  In coordination with NewFields River Basin Services, LLC and the Alameda County Flood Control and Water Conservation District, Northgate performed technical studies in support of the flood control and creek restoration project. Studies included a hazardous materials investigation, a geotechnical study, a groundwater assessment, a bank stabilization evaluation, and a groundwater flow study.  The purpose of the project was to increase flood capacity, reduce nuisance vegetation, improve bank stability through bioengineering, and restore the riparian and marsh habitat.  Northgate’s studies were integrated by the Design Team to into the project alternatives development component.  Northgate developed recommendations for stabilization techniques included corrective grading (reshaping the banks and slopes to establish beneficial water flow patterns), planting with desirable riparian vegetation, and installing natural materials such as logs, live willow brush mattresses, boulder toes or coir fabric lifts.  From the approved development component, Northgate produced the design plans and specifications for the final design for all project elements in AutoCAD Civil 3D.