Western Aqueduct Project
The Western Aqueduct is the single largest water infrastructure project undertaken by eThekwini Municipality. It will bring water into Durban from the Midmar Dam and the recently constructed Spring Grove Dam and will meet the needs of the Greater Durban region for the next 30 years. It will provide additional capacity of 400 ML of water per day to augment the 900 ML currently consumed daily by the city and is thus of strategic and socio-economic importance to the Greater Durban region. Its route generally runs along existing municipal roads through the eThekwini region from Umlaas Road, terminating at Ntuzuma, Pinetown, and Tshelimnyama.
The professional team, consisting of Knight Piésold, Royal HaskoningDHV, and Naidu Consulting, formed the Western Aqueduct Joint Venture.
Knight Piésold’s Role
The Western Aqueduct Project was undertaken in two phases and eight construction contracts. Knight Piésold was the lead consultant on both phases. The tasks undertaken by Knight Piésold included:
- Preliminary design and route determination, including hydraulic analyses and pipeline sizing
- Servitude negotiation and facilitating servitude registration, including temporary working space during construction
- Facilitated detailed geotechnical investigations for pipe trenches, jacked sleeves, and river crossings
- Detailed design, including pipeline yield stress analysis, crotch plate and collar plate design, air valve sizing and positioning for air release and vacuum break
- Detailed drawings, including graded longitudinal sections, chambers for air valves, scour valves, isolating valves, jacked sleeves and cross connections
- Construction supervision and quality monitoring of materials supplied, NDT testing, cathodic protection and record management
- Coordination, planning and overseeing the tie-in into existing bulk systems
- 2018, Institute of Municipal Engineering of Southern Africa, Excellence Awards, Winner, Structures & Civils Category