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  3. Supervision consultant services for the execution of a 5-year non-revenue water reduction program, through a PBC

Supervision consultant services for the execution of a 5-year non-revenue water reduction program, through a PBC

An association of firms lead by Miya Bahamas Ltd. (MIYA), the non-revenue water contractor has been contracted to reduce non-revenue water in New Providence over a period of 10 years (from 2013 to 2022):

  • Phase 1: non-revenue water reduction (5 years)
  • Phase 2: non-revenue water reduction (5 years)

The non-revenue water performance based contract has a total amount of 83 million USD, including 23.7 million of variable performance compensation.
The goals are:​

  • Reduce the average daily volume of non-revenue water from 5.5 MIGD to 2.5 MIGD (20,800 m3/day to 9,500 m3/day)​
  • Provide 38,000 households with improved access to drinking water​
  • Provide an additional 2,000 households with access to drinking water​
  • Reduce the number of households that use private wells​
  • Train WSC staff on techniques and processes for reducing non-revenue water​
  • Assist with improving the management of assets​
  • Project execution dates
    from January 2013 to November 2018
  • Localization
    Nassau and New Providence​ Island / Bahamas
  • Expertise domains
    • Commercial optimization
    • Operational assistance
    • Organizational strengthening
    • Technical optimization
Description of the WMI service

WMI/SCE, the technical consultant, provided the WSC third party review of the performance of the contractor and compared it to the terms and conditions of the non-revenue water contract – phase 1:​

  • Review and recommend improvements for the baseline survey and non-revenue water reduction strategy, the progress reports, the studies and detailed design
  • Conduct on-site field visits and works supervision
  • Compare the contractor’s progress to the contractual targets​
  • Prepare reports every 3 months and every year to document the progress and note any concerns related to the contractor’s work and performance
  • Help the WSC’s work with the contractor to solve any issues
  • Participate in mid-term and final review of the non-revenue water reduction contract

The mains topics continually monitored by WMI/SCE are: logistics, leak detection & repair, pressure transient control & pressure management, pressure zones (PZ) & district metering areas (DMAs) boundaries control, DMA pressure management, replacement of faulty loggers, netbase software implementation, maintain up to date geographical information system and data analysis, inactive service lines disconnection, selective service line replacement, selective mains replacement, non-revenue water reduction asset maintenance, update and calibrate hydraulic model, system optimization, align meter reading routes to DMAs, SCADA, trainings, social intervention program.​

Key Results
  • 89 DMAs
    and 32 pressure zones installed​
  • 7,800
    miles of networks controled for leaks
  • From 5,5 MIGD to 2,5 MIGD
    of non-revenue water reduced
  • About 50 M$
    financial benefits estimated during the first 5-years period
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