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I am strongly opposed to the pressure drainage system, due to:
1. the potential for significant damage due to a failure in the pumping and/or backflow prevention devices.
2. my property already has an easement within it for the future provision of sewer drainage. If this is not used for the pressure system (it uses the street) then this easement should be removed and all costs borne by YVW
3. Personal costs to connect to a pressure system will far outweight the costs to connect to an equivalent gravity system, due to the location of the systems in our location. This would be a 5-fold increase (at least) and require more significant external works within our property, as all drainage currently falls to the grey water and septic systems on the opposite side of the property to the street and proposed pressure main (in preparation for the future gravity drainage through the easement).
I am sceptical about the pressure drainage as well.
1.Root systems will create havoc
2.regular power outage will be a problem
3. personal costs
Thanks for your post.
Pressure Sewer Systems (while a comparatively new technology to traditional sewers) are becoming increasingly preferred. I will elaborate further on the points you raised:
1. Root systems. Pressure Systems use Polyehtylene pipes that use a jointing method that is more robust than that used for a gravity sewer. This means it is in fact more difficult for tree roots to intrude into the sewerage network in Pressure Systems, than it is for Gravity Systems.
2. Regular power outage. I understand that power outages are more frequent in North Warrandyte than other areas of Melbourne. The good news is more…
Thanks for your feedback on this project. I’ll address your points as below:
1.Regarding the failure of:
a. The pumping equipment. In the event of mechanical failure of the equipment, property owners are notified of failures by an audible and visual alarm that is sounded from a control panel located on their premises (either on an outside wall of their house, shed, or a standalone panel). The storage tanks have more than one day’s emergency storage within the unit, so Yarra Valley Water’s maintenance contractors can respond to fix the problem prior to a spill occurring.
b. Backflow prevention devices. Yarra more…
I am surprised the report recommends a pressure system and not the gravity or hybrid system.
Each system requires a number of pump stations with the pressure system requiring the most.
With every property requiring a storage tank and pump and valve pit I cant imagine this to be more economical than the hybrid system when around 40% of properties would not require the tanks/pits.
As our treatment plant is only 18 months old and serviced regularly is draining the effluent to the sewer system an option as it would already have been treated. Could this reduce fees, charges to the property owners as we already pay for quarterly services?
With the pressure system would the in line booster pump stations be concealed? underground?
With the gravity and hybrid system pump stations be concealed? underground?
Any visible pump stations would impact on property values nearby.
First of all, thanks for your post and interest in the project. I’ll address your points as below:
1. The report recommends a pressure system due to the approach used to compare options. This option came out most favourably when considering the Multi Criteria Assessment (i.e. comparing against a range of customer, environment, culture/social, and efficiency (cost) factors). Having said that, the scores between the Pressure and Hybrid were not vastly different, so a Hybrid system could be preferred based on further investigations and feedback received on this forum. Two of the reasons this came out more favourably than the more…
With regards to the visual impact of these pump stations, the simple answer then is that yes they will be visible and yes they will be an eyesore for those who delight in gardens whether natural or exotic.
Thanks for your contribution to this forum.
There are two types of pump stations that may be used for the North Warrandyte Sewerage Backlog Area; On-Property Pressure Sewer Units, and larger centrally located Sewage Pump Stations.
On-Property Pressure Sewer Units are small pump units that are installed on a customer’s property. They are much smaller than the more traditional type of Sewage Pump Stations, which are centrally located and collect and pump sewage from a large number of houses. The visual impact of On-Property Pressure Sewer Units is quite small, as the resident will only see the lid of the more…
Black water pumping systems must present a significant maintenance effort and cost. Who will bear this ongoing maintenance burden? Power cost for operation - a burden for the property owner? Pump failure effect on service (sorry can't use the toilet or take a shower because the pump has failed - again). As the owner of an electric treatment plant who is amazed at the actual operating cost (power, maintenance and the high incidence of failure) I wonder how any electric up-hill solution could be anything but big trouble. Show us the precedent of a delighted community with this proposed wizardry - or come up with something that is not a cure far worse than the disease.
Thanks for your interest in this project and your contribution to the forum. You raised a number of concerns, so I’ll summarise our response here:
- Maintenance. The ongoing maintenance of on-property Pumping Units and larger centralised Sewage Pump Stations is Yarra Valley Water’s responsibility. The on-property Pumping Units used by Yarra Valley Water are designed to operate automatically, and maintenance is only required when there is a blockage or a mechanical failure that causes the pump to stop operating. The Pumping Units that have been supplied to Yarra Valley Water over the past five years have proven to more…
@ Matt. Statistics on satisfaction levels of existing installations should be mandatory information provided to all Nth Warrandyte residents rather than an optional extra provided to individuals on demand.
Thanks for your numerous contributions to this forum.
I assume you are referring to my part of the post that said ‘If you would like more specific information, please feel free to contact me to discuss directly.’ This was regarding the operation of the units and impacts on residents’ lifestyle, not on satisfaction levels of existing pressure sewer customers. One of the key requirements for Yarra Valley Water’s Pressure Sewer Products is that a customer’s lifestyle should not be impacted by whether they are serviced by gravity or pressure. What this means is that a customer doesn’t have to change more…
@ Mark. As I am thinking of not connecting to the sewer but instead putting in a treatment plant I would be grateful for some idea of maintenance costs.
Unfortunately there is insufficient information in the report to allow any view to be formed as to the recommendations, although I do appreciate a system which allows smaller pipes would have a significant advantage. But the description of the hybrid system is quite vague. My house and the two adjacent houses are on a steep hill above the road, where the sewer is proposed to run. Do we need a pressure pump each, when gravity feed would be more than reliable? Just curious.
More importantly, I'm wondering if this project could embrace a look at the water supply. We have had more than one interruption to service in my street in recent times due to rusty mains, plus several of us are alleged to depend on old 'private' mains, in some cases quite vulnerable - plastic and near the surface. While we're digging up the road reserves, would it make sense to consider other underground opportunities? Come to think of it, powerlines and trees don't mix that well either!
Thanks for your comment on this forum and your interest in the project.
The intention of the Summary Report was to disseminate the main findings of this project into a short, succinct document. The document summarises the findings of two larger technical documents (both in the order of 100 pages in length), that will be uploaded to the site later this week. If you require further information about anything contained within the Summary Report, please refer to these larger documents or post some questions on this forum.
You had a couple of queries about the Hybrid and Pressure Systems, so more…
Thanks for your answer. I should say that I accept that sewering the area is a good thing even though I don't personally have a problem with the current arrangement.
But I would like to understand the pressure/gravity situation better. At the end of Hamilton Road there are certainly 3 and maybe 5 properties that could gravity feed into a shared pressure pump. What are the pros and cons?
No problem at all with the response, I’m glad it was helpful.
If a pump was used to service more than one gravity property, it would need to be a larger type of Sewage Pump Station, located somewhere in the road reserve. This would contain a large concrete wet well (built below ground but with a large concrete roof at the ground surface level), and would need to be installed in a location that would allow access for maintenance personnel. The Pressure Sewer Units that are shown in the Summary Report could not be used to service a group of more…
Whatever method is chosen, the property owner should bear minimal cost. Anything over $500 is onsite plumbing costs is unacceptable and unafforable to me. I don't intend on taking out a loan either.
Thanks for your post and your interest in the project.
As I have indicated elsewhere in this forum so far, residents who have a system that complies with EPA requirements for the on-site management of wastewater are not required to connect to the system. There is a useful flow chart on the third page of the ‘Backlog Program Explained’ Fact Sheet that has been provided under the ‘Documents’ section of this site. This flow chart demonstrates whether properties are required to connect to the new system once it is provided. To summarise this, every property that cannot demonstrate that their more…
There is insufficient information for me to make any decision about what methods should be used. Our septic tank is old, but, as I am a pensioner, I cannot afford to connect to a costly sewerage system and also pay for plumber's fees and a pump.
Perhaps Yarra Valley Water should be spending more time on maintaining what they have and regularly cleaning out the storm gutters in the "oh so costly" kerb and channelling put in half way along Kangaroo Ground Road.
Thanks for your contribution to this forum and your interest in the project.
If the reticulated service is the option that is carried forward in design, properties that cannot demonstrate compliance with Environment Protection Authority (EPA) Victoria requirements for on-site containment of wastewater will need to connect to the sewer once it has been provided. These are indicated in the Flow Chart on Page 3 of the Fact Sheet included in the ‘Documents’ section of this website. In short, these requirements are to treat wastewater to the required standard, and contain it on the property all year round. Many existing more…
Tackling pollution from waste water is important, but it is only one of several important environmental goals. Another is water recycling. Water is a precious resource for both people and the natural environment, and any opportunity to recycle it should be pursued with all water projects. Our suffering rivers deserve nothing less.
$25+million ($24,000+ per property) of public funds will likely be spent on this project to reduce water pollution but the reported analysis attributes no tangible benefit to those options that allow treated water to be reused on site or returned to the environment. In particular I would like more…
Thanks for your post on the forum. You raised a number of points, so I’ll address them in turn under the below headings.
Yarra Valley Water is aware of the importance of recycling water where possible, particularly in the recent periods of drought.
The Concept Design Report provides further information on the Triple Bottom Line (TBL) assessment that was used to score each option. This approach uses a number of sub-measures from the following broad categories to score each option:
- Culture / Social
The ability of each option to save potable water (e.g. more…
Is this all just a PR whitewash? The more I read on these forums the more concerned I become. The YVW preferred system is going to be an expensive eyesore and potentially more dangerous than the septic systems we have now. When it works it will take water away from a very dry area. When it fails it could be disastrous. The stated 6 hour callout time on blocked pumping stations is only applicable during business hours. So what happens when the pumping stations block after 5pm on a Friday night? And why is the customer satisfaction data from existing installations in Donvale, Heathmont etc not made available as a matter of course instead of just 'on demand'? Finally, at a time when we are all trying to conserve energy why is YVW intent on installing something that will collectively use a great deal of energy? Warrandyte is nothing but hills so even with an intermittent pump that's a lot of effluent getting pumped UP HILL. Isn't it time we started planning for the future and a /lower/ carbon footprint?
Thanks for your continued contribution to this forum. You raised a number of concerns in this post which I will address in turn.
I can assure you that this forum is not a ‘PR whitewash’. Yarra Valley Water is using this online forum as an extra way to gather input from the community on the proposed sewerage services. Other means of gathering this feedback include letters we have received about the project, phone calls, emails, and face to face contact at the recent Warrandyte Festival. The feedback received is taken seriously by Yarra Valley Water and is used to more…