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Dunedin City Council – Kaunihera-a-rohe o Otepoti
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Mosgiel Stormwater Project

The Dunedin City Council is working to improve the Mosgiel stormwater network.

Following flooding in July 2017, we talked to residents and investigated the network to build a clearer picture of the causes of the flooding. A key issue is that the stormwater pump stations at Carlyle Road and Reid Avenue cannot cope with large volumes of rain and so stormwater backs up and causes flooding, rather than draining to the river as designed. Stormwater can also get into the wastewater pipes and then overflow onto the road.

We are planning to replace these pump stations, which will reduce the risk of flooding in both catchments. A map of the pump stations and catchment area (PDF, new window, 1.3MB).

Mobile pump stations will be used in the meantime to help increase the volume of stormwater the system can handle and reduce the risk of flooding in heavy or prolonged rain.

The size of the stormwater pipes in the wider area also needs to be increased to further alleviate flooding. We are assessing what’s needed and construction will start when the new pump stations are complete.

This work is a significant starting point for improvements to the stormwater and wastewater network in Mosgiel. We would welcome input from Mosgiel residents and want to keep you informed about these projects – please keep an eye on the updates page for the latest information. If you have any questions, please email us at

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