Construction activities for the R1.2-billion Phase 2C and Phase 2H of the Olifants River Water Resources Development Project (ORWRDP) are currently being undertaken by construction group Basil Read.
Phases 2C and 2H entail the construction of 40 km of welded steel pipeline varying in diameter from 1 800 mm to 1 300 mm, with wall thicknesses of between 5 mm and 14 mm.
Basil Read was awarded the contract by the State-owned Trans-Caledon Tunnel Authority, which implements bulk raw water infrastructure, in February. The duration of the contract is 21 months and implementation started at the end of April.
“We are currently busy with the geotechnical investigation, a critical part of the pipeline’s construction process, as it will indicate where drilling and blasting will occur along the pipeline route,” Basil Read business development group executive Kgomotso Sekgobela tells Engineering News.
Upon completion, the pipeline will deliver 49-million cubic metres of water a year.
In May, Basil Read bought three new 80 t Volvo pipe-layers to be used on this project.
Further, another part of the contract will be the construction of the Steelpoort pumpstation, which includes electrical, hydro- mechanical and instrumentation works with a capacity to deliver 2 m3/s of water.
The project scope includes major earthworks, pipe installations and welding, road and river crossings, as well as pipeline chambers and appurtenant works, says Sekgobela.
“This project is in line with Basil Read’s group strategy of growing its participation in bulk infrastructure projects such as this, and it gives us the opportunity to showcase our experience in major pipeline construction,” he states.
The R600-million Phase 2D of the ORWRDP, which will involve the construction of a 25 km pipline, using 1 100 mm welded steel piping, as well as the construction of a terminal reservoir, is expected to be awarded within the next few months, says Sekgobela.