McCosker Parcel Creek Restoration

Key Features 

  • Restoring the natural ecology of the site 

  • Providing upstream migration access for rainbow trout

  • Constructing three vehicular and pedestrian creek crossings (bridges and arch culverts)

  • Grading for new fire access roads and park facilities 

Geotechnical Challenges 

Innovative Solutions 

  • Large amounts of fill previously placed without engineering controls

  • Existing fill made up of clayey overburden materials and quarried crushed rock

  • Undocumented fill slopes with poor static and seismic stability 

  • Daylighting 2,000 linear feet of creek by removing existing culverts and drainage structures

  • Reuse of daylighting spoils to create fire access roads and campsites 

  • Strategically placing large volumes of soil as engineered fill at two upland sites to avoid future slope instability 

1/4
A3GEO, Inc.   1331 Seventh Street, Unit E,  Berkeley, CA 94710 

© 2017 by A3GEO, Inc.