Manhole and Pipeline Rehabilitation
Designs Reduce Hydraulic Restrictions

Project Name
White Clay Basin Manhole & Pipeline Rehab
New Castle County
New Castle, Delaware
Service Period
2006 - 2015

Using results and recommendations developed from a multi-phase, multi-year sewer inspection program of New Castle County’s White Clay Basin, rehabilitation and replacement designs were developed to remediate I/I.  A 30-inch sewer was also realigned to alleviate a hydraulic restriction at an old meter vault. Hydraulic modeling was performed to develop and validate design recommendations.

Project Metrics

Design of:
  • 3,000+ manholes
  • 470 pipe segments


  • Design study
  • Manhole and pipe design including CIPP
  • Pipeline design