NCSD Ashley Interceptor Rehabilitation Phase 8 Surprises and Successes

July 11th, 2019

The Ashley Interceptor Rehabilitation – Phase 8 differed from previous phases of the Sewer District’s interceptor rehabilitation program because in addition to the sections of the interceptor that was laid in the marshes associated with the Ashley River, other portions were constructed within narrow, live oak lined roads in an upscale neighborhood. The setting(s) proved to provide interesting challenges including public relations management, difficult access issues and protection of private properties as well as environmental resources. This case study of the Phase 8 cured-in-place pipe (CIPP) rehabilitation of 4,650 linear feet (LF) of reinforced concrete pipe (RCP) highlights the unique challenges presented to an experienced team comprised of the NCSD, the consultant engineer and the contractor.

The project was bid in May of 2018, with eight qualified contractors and bids ranging from $1.83 to $3.97 million. The contract was awarded to SAK Construction, LLC as the lowest qualified bidder. Prior to the commencement of construction, The NCSD, the engineer and the contractor presented the project scope to the neighborhood to elicit acceptance. Their understanding of the necessity of the project allowed their patience with the disruptions.

Construction began in August, with completion scheduled for January 2019. In addition to the interceptor rehab, fourteen manholes and the force main receiving junction box (JB) at the downstream end of the project were rehabilitated. Several service and main laterals were reinstated in the interceptor after the new pipe was cured.

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James C Reigart, PE (WK Dickson) and Jarred Jones, PE, MBA (North Charleston Sewer District)
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