Sewage holding tanks at Millwater

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Cruciblewrecker

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Topic # 183856 1-Nov-2015 18:09

Hi all,

Went for a drive today and had a look at a couple of show homes at Millwater and the guy at the second show home said all the houses had to have a sewage tank that stores sewage during the day and pumps it out during the nighttime off peak flow.When did this become required and what contingencies does the Council/Watercare have if the power is off for 3+ days?

mattwnz

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Reply # 1418231 1-Nov-2015 18:15

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I don't know anything about that development. However with a few other developments I have seen, the developer and council do 'horsetrading', in the planning stage. As an example, the developer may want to get more sections off their subdivision than that normally allowed. So the council may require each property they put in tanks for stormwater to be used for toilets, which reduces the load on the town supply. So you should put this in mind when putting in an offer, as potentially you have maintenance down the track with maintaining the tank etc. You also have the install costs if the property doesn't currently have a tank.

Cruciblewrecker

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Reply # 1418232 1-Nov-2015 18:17

mattwnz: I don't know anything about that development. However with a few other developments I have seen, the developer and council do 'horsetrading', in the planning stage. As an example, the developer may want to get more sections off their subdivision than that normally allowed. So the council may require they put in tanks for stormwater to be used for toilets, which reduces the load on the town supply. So you should put this in mind when putting in an offer, as potentially you have maintenance down the track with maintaining the tank etc.

Yeah the guy said you're responsible for maintaining it.

driller2000

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Reply # 1418267 1-Nov-2015 19:33

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long and short - the existing ww network is constrained - and it allows for staged development etc

each site has its own storage - generally 24 hrs - or more - power is unlikely to be out for much longer than that in an urban setting - albeit it does happen sometimes and if it is sucker trucks can be deployed

more detail here:

https://higherlogicdownload.s3.amazonaws.com/IPWEA/54373f45-ee0d-4402-848e-09c13efa3df6/UploadedImages/LDEG/2015/Presentations/6.%20Millwater%20Case%20Study%20-%20Final.pdf

Aredwood

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Reply # 1418450 2-Nov-2015 01:16

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It would have also saved money on the install costs of the common sewers as well. As they would have been able to use a pressure sewage system. Instead of a gravity sewage system. Smaller diameter pipes and probably saved on the cost of building some pump stations as well.

Cruciblewrecker

35 posts

Geek
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Reply # 1418659 2-Nov-2015 11:29

driller2000: long and short - the existing ww network is constrained - and it allows for staged development etc

each site has its own storage - generally 24 hrs - or more - power is unlikely to be out for much longer than that in an urban setting - albeit it does happen sometimes and if it is sucker trucks can be deployed

more detail here:

https://higherlogicdownload.s3.amazonaws.com/IPWEA/54373f45-ee0d-4402-848e-09c13efa3df6/UploadedImages/LDEG/2015/Presentations/6.%20Millwater%20Case%20Study%20-%20Final.pdf

Thanks for posting the link to the PDF .Much appreciated.

Cruciblewrecker

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Reply # 1418661 2-Nov-2015 11:32

Aredwood: It would have also saved money on the install costs of the common sewers as well. As they would have been able to use a pressure sewage system. Instead of a gravity sewage system. Smaller diameter pipes and probably saved on the cost of building some pump stations as well.

Yeah it does make a lot of sense to do and the maceration of the waste probably makes it easier for the treatment plant to break down the waste.