Freeing the flow to stop flooding

Last updated 05:00 20/12/2013

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Bicycles, shopping trolleys, silt and now bridges have been removed from a Christchurch waterway to help prevent flooding of earthquake-damaged properties.

After the quakes, parts of some Mairehau streets sunk by up to 50 centimetres, leaving them prone to flooding.

A residents' group, assembled by Carrick St property owner Jo Byrne, has been fighting for a resolution.

In October, Christchurch City councillors agreed to urgently look at remediation plans in the Dudley Creek/Flockton St area after streets there flooded several times.

Council unit manager, transport and greenspace John Mackie said under the council's Land Drainage Recovery Programme they had identified priority areas for work.

The Dudley area came up as the "most critical" so the council looked for some "quick wins" to help the area.

In the past few months, more than 5000 tonnes of silt, debris and miscellaneous items have been removed from the creek.

Yesterday, six bridges were removed from Cera-owned properties to help the waterway flow freely, reducing its chances of flooding.

"It's like when your sink blocks up with fat. You have to clear the sink opening to make it easier for the water to get through," Mackie said.

"The more debris that accumulates, the more chance you get a bit of a dam effect."

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- The Press


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