At the end of February 2012, New Castle County, Del., recently awarded RJN Group Inc. (RJN) two collection system project extensions within the White Clay Creek Sewer Basin.  

RJN and New Castle County have had a strong working relationship for more than 20 years.  RJN has specifically been providing services for the White Clay Creek Sewer Basin Rehabilitation Program since 2006.  The recently awarded contract extensions for this program are for Infiltration/Inflow (I/I) source identification and sewer system rehabilitation design.  

This is the final I/I source identification project of the Rehabilitation Program.  RJN will perform field investigative services to identify defects in several basins with excessive infiltration and inflow within the White Clay Creek Sewer Basin.  Field investigative services will include smoke and dye testing, manhole inspection, night flow isolation, and CCTV inspection in an area covering over 420,000 lf of sewer and over 2,000 manholes.  

This large study is the capstone on a series of field study projects that have identified repair priorities to New Castle County for sewer rehabilitation in this large basin, comprised of over 50,000 manholes. RJN will also be performing rehabilitation design services for several study basins within the White Clay Creek Sewer Basin.  The design is based on the findings of four sanitary sewer evaluation study (SSES) reports previously completed by RJN.  It is envisioned that RJN will provide three separate design packages to impart details for completion of manhole rehabilitation and trenchless rehabilitation solutions including sewer mainline
relining and lateral sewer relining.

The I/I source identification project is an 18-month project that is scheduled to be completed at the end of August 2013.  The sewer system rehabilitation design project is a nine month project scheduled for completion at the beginning of December 2012.