Contractor of Choice – Mladen Buntich Construction Co. was contracted by the Los Angeles County Sanitation Districts.

This project was the first of many that Buntich was able to work and develop inline bypassing techniques through temporary engineering and designing. This is now some of the most commonly used methods in the trenchless industry. Buntich crews while working in live flow conditions sliplined new CCFRPM 57-inch liner and an existing 62-inch reinforced concrete pipe (RCP) with a Akkerman Hydraulic Pushing Machine SL/50. This project consisted of the structural rehabilitation 3,700 LF of structurally deteriorated 62-inch diameter reinforced concrete sewer pipe (RCP) that was originally constructed in the early 1900’s.

The Buntich Project Team structurally rehabilitated this project with a new CCFRPM liner via the sliplining method using a 57-inch inside diameter CCFRPM liner with a vinyl ester interior liner. This was the first time that a CCFRPM liner was used for a 57-inch diameter.

Additional Features Include:

  • Procurement and casting of new PVC lined concrete access structures
  • Inline bypassing
  • Wire saw demolition and removal of existing sewer segments in live flow.
  • Existing pipe reconstruction and encasement
  • Host pipe cleaning and proofing
  • Odor control
  • Disposal hazardous debris
  • Annular space grouting
  • Installation of new operation and maintenance access points
  • Installation and removal of multiple access shafts using beam and plate, trench shield.
  • T-Lock manhole rehabilitation