page_title: North-South Carrier
section_title: NSC-2
hierarchical_section_title: North-South Carrier / Construction / NSC-2
caption_attribution_description: English: The Main Mall, a pedestrian-only street in downtown Gaborone, Botswana
context_page_description: The North-South Carrier is a pipeline in Botswana that carries raw water south for a distance of 360 kilometres to the capital city of Gaborone.
  Phase 1 was completed in 2000.
  Phase 2 of the NSC, under construction, will duplicate the pipeline to carry water from the Dikgatlhong Dam, which was completed in 2012.
  A proposed extension to deliver water from the Zambezi would add another 500 to 520 kilometres to the total pipeline length.
  The NSC is the largest engineering project ever undertaken in Botswana.
context_section_description: In the original plans, NSC-2 would deliver 45,000,000 cubic metres (1.6×10⁹ cu ft) annually at a cost of P5.5 billion.
  Construction of the Dikgatlhong Dam on the lower Shashe River began in March 2008 and was completed slightly ahead of schedule in December 2011.
  This is a zoned earthfill structure, 41 metres (135 ft) high and 4.5 kilometres (2.8 mi) long, with potential storage capacity of 400,000,000 cubic metres (1.4×10¹⁰ cu ft), 
  almost three times that of the Gaborone Dam.
  The dam will start impounding the Shashe River during the 2012–2013 rainy season.
  The first portion of the NSC-2 pipeline, NSC-2A, will connect the Dikgatlhong Dam to the NSC 1 Break Pressure Tank 1 at Moralane.
  With a troubled world economy, the Botswana government decided that between 2010 and 2016 they would focus on completing the NSC-2.1 section and upgrading NSC-1.  
  Construction of NSC-2.2 from Moralane up to Palapye would be deferred to the 2017–2022 budget period.
  NSC-2.1 delivers water from a new storage reservoir at Palapye to a new reservoir at Mmamashia via two new pumping stations.
  The NSC-1 upgrades would include introducing variable-speed drives at the existing pumping stations and installing a new pumping station, as well as upgrades to transfer links and treatment works at the south end of the pipeline.
  Initial planning also started for NSC-3, another pipeline in the same corridor.  The three independent pipelines would provide greater security and redundancy, although they would be operated using an integrated communication and control system.
  In June 2012, stakeholders were told that construction of the NSC-2A pipeline to connect the Dikgatlhong Dam to the NSC was behind schedule.
  This part of the project had started in October 2011 and was due for completion in October 2013.
  The contractors, China State Construction Engineering Corp and the local Excavator Hire, had 350 employees, 75 of whom were Chinese.
  The delay was caused by failure of a factory in Palapye to produce pipes of acceptable quality.
  There were some concerns that further delays could occur if there were problems with blasting along the section from the Letsibogo Dam to the Moralane break-pressure tank and pumping station.  Along this stretch, the new pipeline runs parallel to the NSC-1 pipeline, and great care must be taken to ensure no damage is done to the existing pipeline.
caption: The Main Mall, a pedestrian-only street in downtown Gaborone
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