Rehabilitation of Main Road Muizenberg to Clovelly (Phase 1)

• Section 1A Northbound (Mountain Side). SV 600 to SV 1100. April to November 2008
  Complete
  
• Section 1B Southbound (Sea Side) SV 600 to SV 1100. January to September 2009
  Complete.
  
• Section 2A Southbound (Sea Side). SV 1100 to SV 1700. September 2009 to May 2010
  Complete
  
• Section 2B Northbound (Mountain Side). SV 1100 to SV 1700. May to September 2010
  Complete
  
• Dalebrook Extension Southbound (Sea Side). SV 2200 to SV 2500. October to December 2010.
  1. This section comprises the installation of the bulk water main and sewer rising main to Dalebrook pump station only. The construction of this section of road forms part of the Phase 2 Contract, which is expected to start in January 2011
     The introduction of one-way traffic on the Main Road has enabled the contractor to construct the 600mm diameter bulk water supply main concurrently with Section 3A
  2.  Once completed the rising main will be pulled into the redundant 500mm diameter water main and coupled up to the Dalebrook sewer pump station
     
• Section 3A Southbound (Sea Side). SV 1700 to SV 2200. October 2010 to February 2011
  1. Bulk Water Main. (60%)
     500m of 600mm diameter ductile-iron bulk supply main including a reinforced concrete valve chamber located at the end of the line near Dalebrook pump station. The necessary air-release and scour valves will be installed simultaneously. This section also includes two 6m long by 1m vertical pipe offsets to accommodate the two existing stormwater outfalls located south of St. James Station and Capri Road
  2. Sewer Rising Main. (0%)
     On completion of the bulk water main the redundant 500 water main will serve as a sleeve to accommodate the full 800m of 450mm diameter high-density polyethylene (HDPE) sewer rising main, which will be connected, to the Dalebrook sewage pump station and commissioned to replace the old 300mm cast iron rising main
  3. Stormwater Drainage. (5%)
     This section requires modifications and additions to the existing stormwater drainage system including the replacement of two pipe crossings and the addition of a subsoil drain for the complete length. The full extent of the drainage requirements has not yet been established.
  4. Sewers. (60%)
     Two rider sewers will be constructed to connect the properties on the sea side of the road to the existing sewer located on the mountain side of this section
  5. Road and Footway Construction (0%)
     In addition to the 500m of 3,7m wide asphalt surfaced carriageway, 2,2m wide brick-paved embayed parking for has been planned. Due to space constraints, the majority of the footway on this section will conform to the minimum width of 1,5m
  6. Problems Encountered
     Physical Constraints: The proximity of live electricity cables and two banks of very hard quartzitic sandstone on the line of the 600mm bulk water main have had a negative effect on the rate of trench excavation
• Section 3B Northbound (Mountain Side). SV 1700 to SV 2200. February 2011 to May 2011
  1. Sewer
     The existing 250mm sewer has been rehabilitated up to Dalebrook pump station using a reinforced CIPP soft liner. The length of rehabilitated sewer is approximately 440 metres on this section. Between Capri and Ley Road, a section of the existing sewer has a reverse gradient. This 60m section will be completely re-laid using 250mm diameter heavy-duty uPVC pipe. Sewer connections will be replaced using heavy-duty uPVC where the existing main is less than 2m deep, for deeper sections, a new rider sewer will be constructed. On completion of the sewer, the existing manholes will be rehabilitated and the redundant connections sealed internally
  2. Water Reticulation.
     500m of 315mm diameter uPVC pipe with valves, consumer connection and meters. To reduce construction time the existing cast-iron main will be sealed and left in place where possible
  3. Stormwater Drainage.
     This section also requires modifications and additions to the existing stormwater drainage system including the replacement of pipe crossings and the addition of a subsoil drain for the complete length. The full extent of the drainage requirements has not yet been established. 
  4. Road and Footway Construction.
     The carriageway is a conventional 3,7m wide asphalt surface. The existing stone kerbs and channels will also be reused in this section. A short section of embayed brick paved parking near St. James Retirement Hotel will accommodate three vehicles. Due to space constraints, the majority of the footway on this section of road is limited to a width of 1,5m. 
     
  5. Problems Expected.
     Physical Constraints: Excavation up to depths of 4m to replace the 60m section of 250mm diameter sewer between Capri and Ley Road. 
     

Phase 2 will be commencing in January 2011 and will take approximately 24 months to complete. The extent of Phase 2 is from Leighton Road in the north to the Kalk Bay Harbour entrance in the south.

Phase 3, from Kalk Bay Harbour entrance to Clovelly Road and from south of the Natalia Labia to York Road in Muizenberg will follow thereafter. (2013 to 2014)