IN preparation for the construction of residential, community housing and commercial developments in Sunningdale Phases 12A, 13 and 14 – opposite the Table Bay Mall in Cape Town’s western suburbs – major work to upgrade the R27 and Big Bay & Berkshire Boulevards intersection has been completed.
Undertaking the R44-million plus intersection upgrade was Baseline Construction on behalf of the developers, Garden Cities NPC who covered the cost as part of its Services Agreement with the City in lieu of development contributions.
The project took approximately 60 weeks and the scope of work was extensive besides roadway improvements which involved the addition of lanes and partial duelling of the respective roads approaching the intersection.
A portion of a new bulk stormwater pipeline was also constructed which in future will route stormwater runoff from Sunningdale Phases 12A, 13 and 14 to the existing Big Bay outfall pipeline located at the eastern boundary of Big Bay.
Upgrade of the intersection
The scope of Baseline’s scope of work included the construction of:
- Additional lanes on all the intersecting roads; namely the R27, Berkshire Boulevard and Big Bay Boulevard. This included:
- Kurbing, channelling and concrete edging;
- Asphalt surfaced pavements;
- Road marking and road signs;
- Non-motorised transport facilities on Berkshire Boulevard and Big Bay Boulevard;
- Road drainage such as stormwater catchpits, pipelines, manholes, subsoil drains and roadside channel;
- Stormwater side drain along the R27 western verge;
- Street lighting and additional services sleeves;
- Relocation of telecommunication services, irrigation pipelines and valves, fence line, etc.;
- Other road construction related tasks.
Bulk stormwater pipeline
The construction of the bulk stormwater pipeline consisted of the laying of approximately 300m of 1 050mm diameter concrete pipes and manholes.
The pipe excavation depth of the bulk pipeline ranged from 1,5m at the inlet, increasing rapidly to a depth of 4,2m at the termination point. The pipeline crossing the R27 was installed by means of trenchless technology with a cover of 1.94m – 2.34m to the road finish level.
Garden Cities Group Manager: Engineering & Planning Renier Smith outlined the extent of the development.
- Sunningdale Phases 12 – Linked to approximately 663 SR (Single residential) Erven and various Group Housing, Local Business and Community sites.
- Sunningdale Phase 13A – 429 Units (aka Northridge Coastal Estate) with the perimeter fencing/walling of the Green Star, Sustainable Precinct now in place and the clubhouse, guard house and admin building.
- Sunningdale Phase 13B – 5.3ha Group Housing Site- Awaiting approval
- Sunningdale Phase 13C – 95 SR Erven- serviced and reflected on building programme during course of next year.
- Phase 14 in its various sub-phases consists of 775 SR Erven, 8 Group Housing Sites (ranging between 1.5 ha to 2.5 ha), a General Business site, Local Business Site and various Community zoned sites – first sub-phase to be serviced by year end to release a Life Right Facility.