PRIVATE WORK

Harmony Grove Village Reclamation Plant

La Jolla Centre III Deep Sewer

Harmony Grove Village

San Diego Zoo Stormwater Equalization Tank

 
 
 

La Jolla Centre III Deep Sewer

Contracted By   Suffolk-Roel
Private Project
Work Performance Dates  August 2013 - May 2014
Location La Jolla, CA
Scope of Work

  • Expose existing 72" trunk sewer at a depth range of 40' - 60'.
  • Place protective cap over top of sewer pipe consisting of slurry and structural geofoam so site could be backfilled and would sustain the weight of a large parking structure and adjacent high rise that are scheduled for construction.
  • Mass excavation requiring various shoring methods including ply forms, trench shields and two large soldier pile walls.
  • Removal and replacement of a portion of trunk sewer, modification of existing tunnel portal structure and addition of new 71' tall section of 16' x 16-1/2' T-Locked concrete structure. Overall height at completion almost 100'.

Unique Aspects

  • Work closely coordinated with City Wastewater Operations staff, as the 51.2 MGD peak trunk sewer flow remain live during entire project.
  • Several phases of the work had to be performed in close, confined space, with short time-frames, since sewer shutdowns were only allowed for a maximum of 4 hours at a time.