Christchurch City Council

Flood update

Thursday, 26 March 2015

COR7

399

Mar

ch 2

015

Dear residents,

Here’s an update on the Dudley Creek bypass plans and the Tay Street Drain pump station work. We are still on track to see the overall project completed by winter 2017. I would again like to take this opportunity to thank you for your ongoing patience.

Dudley Creek bypass optionsChristchurch City Council today approved a report from staff detailing plans to investigate two bypass options for the lower reaches of Dudley Creek that will provide flood remediation for the most vulnerable areas in the Dudley Creek / Flockton area.

The Council approved the awarding of a contract to Beca Consultancy Services to assess the options for the downstream portion of the proposed works and the design element of the upstream work.

Beca will deliver a comprehensive report to the Council in July 2015 outlining a full technical analysis and comparison of the advantages and disadvantages of the two options.

Option A: Warden Street Bypass, Dudley Creek channel works along Banks Avenue and residential red-zone.

Option B: Warden Street Bypass, Marian College, Richmond Park and residential red-zone.

Getting feedback and engaging with the community on this issue will form a huge part of the decision making process when Councillors choose a preferred option. We have already had valuable contributions from the community in our initial consultation in November 2014 and this feedback, along with future consultation, will provide the detailed information that is required for the assessment of both bypass options.

We are very conscious of the impact this work will have on the Dudley Creek environment and surrounding areas. We need to be sure these works, wherever they are carried out, provide a well balanced and well designed option for improved flood protection for the community, as well delivering value for money to the Council and the rate-payer.

We acknowledge there have been delays with the decisions around progressing the work, but we want to get this right to ensure the maximum benefit to our communities.

To view the Dudley Creek Flood Remediation Update report to the Council, please visit here.

Tay Street Drain pump stationThe pump station will be completed by the end of March and will be fully operational in early April. If there was a flood event between now and the pump station being fully operational, plans are in place to set up temporary skid-mounted pumps that would use the newly installed pipeline.

We will keep you updated on progress through this newsletter and you are also welcome to contact floodmitigation@ccc.govt.nz with any questions.

Yours sincerely,

John MackieGeneral Manager Infrastructure Rebuild

Work progresses on the Tay Street Pump Station

Christchurch City Council

Dudley Creek post-earthquake flood protection timeline

March/April 2014Floods

June 2014• Mayoral Flooding Taskforce update report to Council• Mayoral Flooding Taskforce final report delivered to Council

May 2014• Mayoral Flooding Taskforce established• Mayoral Flooding Taskforce report delivered to Council

November 2014Public consultation on Dudley Creek preferred option for flood remediation.

December 2014Council asks for preferred flood remediation option to explore using residential red-zoned land near Marian College for the Bypass.

May/June 2015Public consultation on the proposed options for Dudley Creek.

July 2015Report following public consultation to Council detailing the outcomes of the public consultation.

2017All flood remediation work expected to be completed before Winter 2017.

June 2014• Temporary Pump Stations installed ahead of heavy

forecast rains• Culvert and footbridge removal along Dudley Creek

December 2014 Following the review of consultation, Council approves upstream works in the Dudley Creek area to assist flood remediation. Design work begins.

March 2015Tay Street Pump Station (PS202) on Kensington Avenue partially operational with capability to remove 500 litres of water per second, which is equivalent to three bathtubs per second.

April 2015Tay Street Pump Station (PS202) on Kensington Avenue fully operational with capability to remove 2000 to 3000 litres of water per second.

October 2014Creek capacity improvements continue with further culvert, sediment and blockage removal work.

Contact us: Phone: (03) 941 8999 and 0800 800 169 Email: floodmitigation@ccc.govt.nz Post: Freepost 178 Dudley Creek Remediation External Relations and Communications Christchurch City Council PO Box 73011, Christchurch, 8154

PROCESS ACTION

26 March 2015Report to Council. Dudley Creek Remediation Update report. To review the report please visit www.ccc.govt.nz/floodmitigation