General

Development

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Sewerage

CCTV monitoring was undertaken in order to determine the quality of the existing sewerage pipelines and identify illegal connections. Work to repair and upgrade the system commenced in 2003.
 

Before 2000:

The increasing number of residents in Alex, unplanned development and overcrowding all contributed to overloading the existing infrastructure, to the point that water pressure was low and sewers frequently overflowed.

 
     

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Illegal sewerage connection
to storm water drain		   Raw sewerage
in streets		   Existing overflowing sewer   Overflowing portable toilet
     

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Old pump station in Jukskei river   Old above-ground water and
sewerage pipes crossing the Jukskei		   Close-up of water quality   Heavily polluted intersection of
old storm water culvert and river

2002 : Jukskei Sub-outfall Sewer and other projects in Alexandra

The old main pump has been extended and converted to a gravitational sewer. This sewer will cross under the Jukskei River and discharge into the Bruma Outfall. Other pump stations currently located on the banks, and pipes over  the Jukskei River will be eliminated.

 
     

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Project board  

Extension and reconstruction of old main pump station with 450mm diameter pipes
     

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River canalisation   Trench   Elimination of pump station   Laying pipes across a bridge
Laying trenches for new sewers   New tie-in manhole        
         

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2003 : Upgrading Modderfontein to Bruma outfall sewer

 
     

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Inside manhole:  sensor measuring flow   Manufacture of horizontal castings   Inside of pipe showing HDPE lining
to stop corrosion. 		  Specially designed sewerage pipes,
providing environmental protection.
             
     

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Construction of manhole including insertion of pipe
     

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Manhole   Deep trench   Rock drilling   Saturated conditions
     

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Laying a pipe   Pipe-laying in rock   Pressure-testing    

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Repairs and upgrading            

2005:

            
         

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All that can be seen above ground of the new Modderfontein - Bruma outfall sewer        

           

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