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WC/WDM Interventions

WC/WDM Interventions. Water availability & supply Bulk Meters & Water Balance GMA & DMA Meters Remote Metering NRW PRV Management ICI Consumers & Billing ATTP Leak Repairs. WC/WDM Interventions cont’d. School leak repairs Ward Cluster Repairs Repair & Maintenance Contractor

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WC/WDM Interventions

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  1. WC/WDM Interventions Water availability & supply Bulk Meters & Water Balance GMA & DMA Meters Remote Metering NRW PRV Management ICI Consumers & Billing ATTP Leak Repairs

  2. WC/WDM Interventions cont’d School leak repairs Ward Cluster Repairs Repair & Maintenance Contractor Domestic Meter Audit Valve & Hydrant Audit Meter Replacement Programme Publicity & Awareness

  3. Monthly demand vs target

  4. 2016/17 Loerie monthly target with water restrictions

  5. Bulk Supply Interventions Linton WTW expected to be operational by 12 October 2016 Leaking air valves on Churchill pipeline replaced Other leaks on Churchill pipeline repaired Audit on bulk pipeline valves/infrastructure

  6. Replacing air valves: Churchill Pipeline

  7. 1. Bulk Meters Progress: 2 Driftsands meters commissioned 2 Chelsea inlet meters commissioned Seaview P/S meter reconnected Gamtoos/Summit BPT meter recalibrated

  8. 1. Bulk Meters cont’d Initial water balance are: Churchill Pipeline System 5.6% Loerie/Summit/Chelsea System 16.0% Nooitgedagt/Motherwell System – in place from 31 October 2016

  9. 1. Bulk Meters cont’d Current initiatives are: Finalise & commission high level & low level meters at Motherwell Reservoir by 31 October 2016 Churchill WTW tunnel outlet meter Churchill/Elandsjagt combined meter – 31 October 2016 Summit outlet meter – March 2017

  10. Motherwell Booster Pump Station

  11. 3 ducts installed for meters at Motherwell

  12. 2. GMA & DMA Meters GMA – Greater Metered Area (49 meters) DMA – District Metered Area (113 meters)

  13. 2. GMA & DMA Meters cont’d Status: GMA – 15 meters in operation, 13 redundant meters & 21 new installations DMA – 83 meters in operation, 23 redundant meters & 7 new installations DMA – 57 new chambers to be constructed

  14. 2. GMA & DMA Meters cont’d Progress: Order issued for construction of 40 chambers 8 out of 22 faulty meters replaced 14 faulty magflow meters to be procured & installed 56 DMA’a are now discrete

  15. Fort Nottingham meter

  16. Fort Nottingham meter on bypass

  17. 3. Remote Metering Objective: To implement for 1 500 meters including bulk meters, GMA & DMA meters and top 500 consumers Status: Tender document prepared for Specification Committee

  18. 4. NRW

  19. 4. NRW cont’d High monthly fluctuation on NRW figures Important to have good liaison between B&T and I&E Directorates NRW reflects all WC/WDM interventions

  20. 5. PRV Management Objective: Quick win intervention Assess existing PRV’s Investigate new possible PRV zones Status: 57 existing PRV stations 3 new stations installed

  21. 5. PRV Management cont’d Progress: All existing PRV’s audited 50 PRV’s are operational 7 need replacement Order given for 10 2-step controllers New tender document drafted for PRV’s 42 PMA’s are discrete Accumulative savings to date is R3.6 m

  22. 5. PRV Management cont’d

  23. 6. ICI Consumers & Billing Status: 9 460 industrial, commercial & institutional (ICI) existing consumers 1 171 ICI consumers use < 5 kl/month 30% of ICI monthly volume is estimated 106 faulty school meters (out of 363) 952 faulty ICI meters (excluding schools)

  24. 6. ICI Consumers & Billing cont’d Progress: 71 of 106 school meters replaced All anomalies found from audits are sent to B&T for correction ICI meters have been read by water loss SP over the last 12 months 49 of 952 faulty meters replaced Contract for meter replacement contractor terminated

  25. 7.1 ATTP Repairs Status: Assistance to the Poor (ATTP) consumers cannot repair internal leaks ATTP consumers (111 000) represent 50% of all residential consumers Historically about 2 000 repairs completed by ward based plumbers Material supplied by NMBM

  26. 7.1 ATTP Repairs cont’d Progress: No. ATTP plumbers increased to 81 Material supplied by NMBM New target is 3 500 repairs/month

  27. 7.1 ATTP Repairs cont’d

  28. 7.2 School Leak Repairs Status: High leakage at schools – estimated at 15 Ml/day DoE has no funds for leak repairs NMBM to use bylaw & installation of Aquatrip shut off devices to reduce wastage

  29. 7.2 School Leak Repairs cont’d Progress: A-G prevented direct repairs by NMBM NMBM preparing schedule of top 50 schools with most wastage

  30. 7.3 Cluster Repairs Status: 6 Cluster Contractors appointed for bucket eradication programme and leak repairs High no. of backlog complaints Call centre deals with average of 90 water complaints/day Approximately 10 000 developed sites are not metered

  31. 7.3 Cluster Repairs cont’d Progress: Cluster contracts have not yet commenced work In interim repairs undertaken by NMBM staff over weekends 1 400 repairs carried out

  32. 8. Repair & Maintenance Contractor Objective: To follow audit of water loss contractor to repair leaks & undertake maintenance Status: R&M contractor appointed January 2015

  33. 8. R & M Contractor cont’d Progress 2016/17:

  34. 9. Domestic Meter Audit Status: Many meters estimated for number of reasons Many consumer meters not on B&T database Many consumers have internal leaks

  35. 9. Domestic Meter Audit cont’d Status: Many meters estimated for number of reasons Many consumer meters not on B&T database Many consumers have internal leaks

  36. 9. Domestic Meter Audit cont’

  37. 10. Valve & Hydrant Audit Status: Many valves & hydrants have faults Many valves & hydrant positions are not as indicated on record drawings

  38. 10. Valve & Hydrant Audit cont’d Status: Many valves & hydrants have faults Many valves & hydrant positions are not as indicated on record drawings

  39. 10. FIRE HYDRANT AND VALVE AUDIT

  40. 11. Meter Replacement Programme Objective: Replace domestic meters older than 10 years Replace commercial meters within 5 years Replace industrial meters every 3 years

  41. 11. Meter Replacement Programme cont’d Status: 220 000 domestic meters 9 460 ICI meters

  42. 11. Meter Replacement Programme cont’d Progress: Poor performance by Meter Replacement contractor 1 639 meters replaced 1st 3 months 2016/17 Target is 2 000 meters/month

  43. Publicity & Awareness Service Delivery Ambassador Programme: Phase 2 commenced 16 July 2016 230 SD Ambassadors Undertake door to door awareness in 29 wards Record complaints

  44. Publicity & Awareness cont’d Water Restriction Campaign: Water Monitoring Committee established with initial meeting for 15 October 2016 Water restriction publicity material being prepared: account insert, suburb entrance boards

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