WATER LOSS PROGRAMME – NELSON MANDELA BAY METROPOLITAN MUNICIPALITY

Client: Nelson Mandela Bay Metropolitan Municipality ss

First Appointment:

Project Value: R 22 000 000

Duration of Project: 3 Years (2010 – 2013)

Second Appointment:

Project Cost: R 25 000 000

Duration of Project: 3 Years (2014 – 2017)

Project Objective:

• Reduce non-revenue water by 15% within 10 years;
• Reduce water wastage;
• Improve the sustainability of water and sanitation services.

Scope of Work:

As a starting point, the NMBM water supply system was sectored into approximately 210 zones using the EDAMS water and sanitation management system which is a GIS-based engineering management information system. In conjunction with this initiative, the NMBM identified the need for water loss services to be carried out. The NMBM appointed us as a service provider in April 2010 to provide water loss services over a three-year period. This work was carried out, zone by zone by dedicated teams assessing all components of the water supply system. The fieldwork comprised of detailed investigation of the water supply infrastructure in domestic areas which included:

• Valve and fire hydrant audits (including update of as-built drawings)
• Meter audit & Meter Flow Tests for on-site leakages
• Leak detection (visual and sounding)
• Data logging of pressures and flows
• Minimum Night Flow Analysis