Nooiensfontein Sewage Pump Station Upgrade

Upgrading of the Nooiensfontein Sewage Pump Station and rising main in Cape Town, in the Western Cape. The contract comprises of the following: the construction of a bypass manhole at the sewage pump station facility. Demolition of existing pump station superstructure and conversion of the existing substructure into a grit trap (renovations to be undertaken once the new pump station is commissioned). The construction of a mechanical screening facility consisting of a reinforced concrete substructure (±5.5m below NGL) and brick walled superstructure with a concrete roof. The construction of a sewage pump station consisting of a reinforced concrete substructure (±7.6m below NGL) and brick walled superstructure with a concrete roof. The installation of mechanical and electrical equipment to the screening facility and pump station. The construction of a 4 100m long 355mm diameter class 9 PVC-u pipeline with associated thrust blocks, air valve chambers and scour valve chambers at depths ranging between 1m and 3m from Nooiensfontein pump station to Bellville WWTW. The construction of a 100m long 110 mm diameter class 9 PVC-u pipeline at depths ranging between 1m and 2m from the new Nooiensfontein pump station to tie into the existing rising main to divert flow to the Baden Powell sewer in order to maintain self-cleansing velocities. The construction of a 40m long 250mm nd steel pipe across the Nooiensfontein road bridge at ground level on the bridge deck. The construction of a 75m long 970mm id concrete sleeve installed by means of micro tunneling crossing beneath the R300. The construction of a 55m long 970mm id concrete sleeve installed by means of micro tunneling crossing beneath the Metrorail / Prasa railway line. The provision of shoring and dealing with ground water for the construction of the screening facility; pump station; pipeline and associated structures and thrust and reception pits for pipe jacking. Connection of the rising main to the existing Bellville waste water treatment works inlet works.