WATER UTILITIES PRESENTATION FOR FWP HEARING MEETING 03 November - PowerPoint PPT Presentation

WATER UTILITIES PRESENTATION FOR FWP HEARING MEETING – 03 November 2016

The Current Problem

Gisborne City Wastewater – Property Issues Robert from Kaiti (1:28 min) https://www.youtube.com/watch?v=YMBwfw7pz-0 Di from Mangapapa (2:10 min) https://www.youtube.com/watch?v=09_s5wDKUrw Stormwater Ponding Kaiti (1:50 min) https://www.youtube.com/watch?v=njGuyjw1BZo&f eature=youtu.be

Gisborne City Overflow Points (49) 1992 – Lots of uncontrolled overflows in operation 1998 – All known cross connections removed/blocked 2000 – All known Pump Stn overflows removed/blocked 2008 – Further checking undertaken 2015/16 – Audit of all Pump Stn overflows 2016 – All known overflows are now controlled

Wastewater Discharges- Event History (24-36hrs) Reporting Frequency of Year discharges 2015/16 1 2014/15 1 2013/14 4 2012/13 3 2011/12 4 2010/11 3 2009/10 4 2008/09 2 2007/08 2 Prior to 2006/07 unknown

DrainWise Project - Background video: http://youtu.be/pq5cG1YFciA Water Ponding Areas (RoG)

DrainWise Project - Background Flood waters flowing over and into private gully traps • Water getting into leaking private gully traps • High Impact Roof water being piped straight into private gully • traps or private lateral wastewater pipes HIGH (GROSS) HIGH (GROSS) • Gully trap faults, • Gully overtopping from ponding • illegal connections,

DrainWise Project – The needle in the haystack

Budget 2015/25 Overall 2015/25 (10 yrs) Total Budget (Current) 26,621,873 In the Long Term Plan 2015/25 Council has allocated $26.6M Wastewater (WW) 19,626,770 over the 10 years. WW - Renewals (Retic) 12,500,000 WW - Upgrades (Retic) 4,250,000 The budget does not cover any Inflow & Infiltration private property improvements, Inspections/Modelling 2,566,070 it was assumes that the property owner would be responsible for WW - Private Property Investigations 310,700 this Stormwater (SW) 6,995,103 SW - Renewals 3,208,200 SW - Upgrades 3,197,673 SW - Model 310,700 SW - Private Property Investigations 267,500 SW - Secondary Flowpaths 11,030

Gisborne City Wastewater – Gully Traps

Gisborne City Wastewater – Gully Traps

DrainWise Project – Our Targets 1. Reduction of wastewater discharged into rivers and streams during heavy rain to an average of only once every two years by 2026/27 2. Reduction of wastewater discharged onto private property during heavy rain to an average of only once every two years by 2026/27 Comment: This equates to a 50% AEP rain event targeting 10% AEP

Wastewater Modeling Results

Wastewater Modeling Results Pipe improvements

- End of Presentation – Questions Di from Mangapapa (2:10 min) https://www.youtube.com/watch?v=09_s5wDKUrw Robert from Kaiti (1:28 min) https://www.youtube.com/watch?v=YMBwfw7pz-0 Stormwater Ponding Kaiti (1:50 min) https://www.youtube.com/watch?v=njGuyjw1BZo&feature=youtu.be Illegal: Stormwater downpipes going to Gully Trap (2:02 min) https://www.youtube.com/watch?v=SoMPfnFGTko&feature=youtu.be Panapa from Kaiti (3:00 min) https://www.youtube.com/watch?v=w8nEKBqR-mM&feature=youtu.be Smoke testing (2:28 min) https://www.youtube.com/watch?v=gJzgBFIReVs&feature=youtu.be