Projects

Reach 4A & 4B Sewer Pipeline Rehabilitation Project

Slide One

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Buntich crews complete the largest (length) live flow sewer rehabilitation project in North America.

This project consisted of the structural rehabilitation of approximately 7 miles of structurally deteriorated 42-inch diameter unlined reinforced concrete sewer pipe.

The existing sewer was located within the Prado Basin, upstream of Prado Dam and within the Riverside and San Bernardino Counties in a very sensitive environmental area. The Buntich Project Team structurally rehabilitated this project with a new liner via the sliplining method using both 30 & 36-inch inside diameter fiberglass liner with a vinyl ester interior liner without any environmental incidents.

Other additional features included:

  • Sliplining 32,503 linear feet of existing large diameter¬†RCP with a new CCFRPM liner
    • 16,557 linear feet was 10-foot and 20-foot 36-inch flush joint CCFRPM liner
    • 15,950 linear feet was 10-foot and 20-foot 30-inch flush joint CCFRPM liner
  • Host pipe cleaning and proofing
  • Odor control utilizing both liquid and vapor phase mitigation methods
  • Disposal of hazardous debris
  • Annular space grouting
  • Installation of new operation and maintenance access points
  • Installation and removal of multiple access shafts using beam and plate and sheet piles from depths 12-feet to 18-feet
  • PVC manhole rehabilitation