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Crown Point Trunk Sewer

Otay 450 Reservoir & Pump Station

Helix 48" Pipeline Project


Alvarado Trunk Sewer Design Build

Contracted By   City of San Diego
Public Project
Dates Work Performed   December 2012 - July 2013
Location   San Diego, California

Scope of Work

  • Installation of two 66" jack and bore tunnels for the relocation of the Alvarado Trunk Sewer Main
  • The line was upsized from 24" clay pipe to new 36" PVC
  • Installed several large diameter sewer manholes, 8" sewer main, asphalt paving, concrete flatwork, revegetation and monitoring


Unique Aspects

  • The project was located in a residential neighborhood and in an environmentally sensitive area
  • The project required archeological, palentological, and biological monitoring as well as noise monitoring and mitigation
  • Installed two large redundant bypass setups which were hardlined and ran 24 hours per day
  • The project also required extensive groundwater dewatering as we traversed directly adjacent to and crossed underneath the Alvarado Creek twice