Mayfield Mines

A Mine Subsidence and Flooding Problem in Newcastle

Subsidence Advisory NSW Withholding Information – Just the Facts

“Subsidence Advisory NSW is the NSW Government agency responsible for supporting property owners living in areas where subsidence from underground coal mining may occur.”

Since our last posts 12 months ago, new information has emerged that Subsidence Authority NSW has purposely withheld information from us.

Just the facts;

  • In 1886, a network of mine workings were interconnected, flooded and abandoned in our region. This land was then sold to the public, with services built over the abandoned mine network.
  • Over 15 years ago, water and subsidence damage started occurring in our property, later spreading to other properties.
  • Subsidence Advisory informed us that there are no mines underneath our property. Government agencies are using this information.
  • Our subsidence and mine water flooding has been allocated as a Legacy Mines problem. Over these years, various agencies believe water from stormwater and Hunter Water assets are finding their way into our properties.
  • During a Legacy Mines Report in 2020 (commissioned by the NSW Deputy Premier), via Freedom of Information documents, we found that Subsidence Authority withheld mine map information resulting in the consultants to use 1886 mine map data and not the most recent geo-referenced mine maps.
  • In March 2023, we requested Subsidence Authority to meet with us as there is conflicting information. After being delayed for months, we were told we needed to lodge new mine subsidence claims. These were lodged in June 2023.
  • Due to ongoing lack of support from Subsidence Authority, in May 2023 we applied for mine maps beneath our property via the NSW Resource Regulator. In August 2024, we received these maps which show multiple abandoned mine workings beneath our buildings. We understand that Subsidence Authority delayed the release of these maps.
  • In order to receive these geo-referenced mine maps, we needed to sign a non disclosure agreement that last for 50 years. Therefore we cannot show you the full extent of the evidence.
  • These current geo-reference street mine maps show a network of abandoned mines that are interconnected, from Mounter Street to under our buildings. The maps show direct correlation between subsidence and mine water flooding in our buildings and neighbouring streets.
  • Since the lodgement of the June 2023 subsidence claims – Subsidence Authority has avoided sharing information, visiting the sites, or meeting with us.

Is the NSW government through its agencies, taking all steps possible to hide the truth and bankrupt us?

 

Subsidence Authority Mayfield Claims

Subsidence Authority Mayfield Region Claim Outcomes

Legacy Mine Maps for Mayfield Have Been Received

After 15 months of lobbying the NSW government, we have finally received the geo-referenced abandoned “legacy” mine maps. We now have direct correlation between the location of the abandoned mine network with over 100 instances of subsidence damage in our properties.

Water flowing “randomly” from under the footpath and into our properties (and others along the street) can be directly connected to the abandoned mines. In these 15 months, 25,000,000 litres have flowed through our properties. The water has permanently flooded Litchfield Park as well as other property owners.

Subsidence and sink holes around Maitland Road now can be fully attributed to the old mine workings. These sink holes have been previously “signed off” by Newcastle Council being caused by termites eating a 1968 telegraph pole. Even though the holes have moved up and down the street, Newcastle Council still maintain its termites causing the troubles. Oh, and they continue to handle street subsidence and sinkhole repairs.

It’s time for property owners in Newcastle to be able to obtain current geo-referenced mine maps on their own property, not a foggy “zone of influence” statement. For more than a decade, Subsidence Advisory has withheld information from us. Even though NSW Government agencies have acknowledged our problems, and understand that our properties/businesses have been destroyed, they have continued to keep silent.

We have collected extensive information in Tighes Hill, Mayfield, Carrington and other suburbs in Newcastle thanks to the support of local home and business owners. Shortly we will start a public campaign and hope you can work with us to bring changes to the way old mine workings are handled in Newcastle and NSW.

38 Maitland Road Subsidence Damage Repair

38 Maitland Road Subsidence Damage Repair

 

mine water 38 Maitland Road Mayfield Carpark

mine water 38 Maitland Road Mayfield Carpark

 

Maitland Road Mine Subsidence Damage 04

Maitland Road Mine Subsidence Damage

Broken Hunter Water Pipes on Ingall Street direct Correlation in Water Flows in Office

If you have been following our problem on mayfieldmines.com, you would understand that the abandoned mine network in Mayfield is full of water, and everytime extra water enters the network, it pushes the water out from mines under Maitland Road into our buildings.

In 2020, a Legacy Mines NSW Report suggested broken Hunter Water pipes on Clara Street Mayfield were a significant factor in water flows into our buildings. During their 4 month investigation, Legacy Mines were taking regular water readings inside the abandoned mines. Legacy Mines drilled a bore on Clara Street as part of their investigation. During their work they noticed that the street had recently been repaired, and after investigation, they found that a garbage truck has subsidence on the street exposing a Hunter Water leaking water pipe. After the pipe was repaired, the water flow significantly dropped.

Clara Street - Hunter Water Repair

Clara Street – Hunter Water Repair

 

Professor Fityus suggested that water from broken pipes  is entering the abandoned mine network and flowing into our properties. He wrote;

Comparison of the date of the repair with the seepage flow data reveals a perfect coincidence between the date that the repair was made and the data that the seepage rate made a sudden reversal and began to decline rapidly. To assess the plausibility that the leaking main could be the primary driver of seepage flows in thehttps://www.mayfieldmines.com/broken-hunter-water-pipes-ingall-street-direct-correlation-water-flows-office/?preview=true area, the dial before you dig service was used to ascertain the nature of the water mains in Clara Street. It determined that the pipe was an old style cast iron, concrete lined pipe, approximately 80mm in diameter, and connected to a larger main at either end.

Based on the water pressure in the area and the length and internal diameter of this pipeline at the location of the break, it is estimated that when intact, the flow through the pipe might be quite low most of the time, and probably less than 60 litres/minute in most circumstances. However, if there is a complete break, and the break is supplied with water from both directions, the maximum flow in this pipe could be in the order of 600 to 1000 litres/minute. If the break is not complete, such as in the case of a leaking joint or corrosion hole, then the flow will be less than it is for a complete break, but it depends on how big the hole is. It is plausible, however, that the pipe could be leaking as much as several tens of litres per minute (enough to feed the observed seepages at #38 ‐ #44), without there being a noticeable effect on the local supply or the water leaving the supply system; that is, it could occur un‐noticed for an indefinite period of time.

Upon inspecting the site of the repair 2 days later, there was no evidence of any muddy outwash from the site of the break, however traces of clean construction sand were still evident around the margins of the hole, suggesting that water from the leaking pipe was lost into the ground and did not produce significant volumes of outwash at the surface.

 

Clara Street - Hunter Water Repair - Water Flow

Clara Street – Hunter Water Repair – Water Flow

 

In July 2023, there are many broken Hunter Water pipes in Mayfield East which are directly opposite our buildings. Recently, the MP for Newcastle, Tim Crakanthorp asked Hunter Water water to investigate the increased water flow into our premises that has resulted in new water locations within the internal buildings (here and here). Hunter Water found a number of broken assets. In this video, we show another example of direct correlation between water running and slowing/stopping in one of our buildings – this time, broken Hunter Water pipes along Ingall Street which we believing were feeding extra water into the abandoned mines, with water then flowing into our meeting room on the ground floor of 44 Maitland Road Mayfield. Once Hunter Water repaired the Ingall Street broken Hunter Water pipe, water stopped flowing from the wall cavity.

Why are Old Legacy Mine Maps Kept from the Public?

Are old legacy mine maps kept from the public so that people do not fully understand they are in a mine subsidence district, or to minimise the amount of claims registered by home owners. During our discussions with home owners in our area, we found that many did not know that their properties were beneath a mine so they never fully understood why their wall was cracking or the garage subsiding. Then we also have owners who told us they applied for subsidence damage, only to be told they are not in the “zone of influence”. Lastly, we also have the situation on hiding the true costs of constantly repairing subsidence damage.

In areas such as Mayfield, we need an open and frank discussion about the waste of money and resources that relate to the old legacy mines, particularly;

  • legacy mine maps to be added to the https://www.planningportal.nsw.gov.au/spatialviewer/ website allowing homeowners to receive information about the old legacy mines that would include the year of mining, the map of the mining including depths/etc and any remedial work that has been completed. Since many of the maps date back to the 1800s, a non-guarantee in accuracy would be agreed to by users – we all use it as “best guide” but not 100% accurate
  • open and public record of mine subsidence claims. If people are worried about privacy concerns, then at least the street name, total claims, and total houses should be listed.
  • cross referencing with agencies such as Newcastle Council (road, kerb, stormwater, etc..) repairs, together with Hunter Water (pipe repairs) should be help with Subsidence Advisory for action plans to solve hot spots.

It seems to us that by keeping information secret from the public, Subsidence Advisory does not disclose the true cost of constantly repairing people’s homes, or roads, etc… And there is no public accountability for the costs to keep repairing public roads, sewer, Hunter Water pipes, stormwater etc…. in mine subsidence districts.

Its our money. Beside the issues on our properties, when we started looking at the overall management of legacy abandoned mines in the Mayfield and Newcastle area, we found a big problem where no agencies talk with each other, and all just handle the very minimum work needed to solve “today’s” problem. So when you look at streets which have 30+ repairs, or the same pipe system being repaired year after year, at what point should one of these government bodies take some responsibility?

Mine Subsidence Mayfield

Mine Subsidence Mayfield

 

Hunter Water Says Ground Water Causing Our Problems

In 2020, Legacy Mines NSW suggests broken Hunter Water pipes are a major contributing factor to water coming into our properties. Water from these broken pipes flow into the abandoned mine network, and because all the old mines are connected together, water then flows into our properties.

Recently, Declan Clausen (Executive Officer to the Managing Director) Hunter Water wrote to Tim Crakanthorp’s office;

“Hunter Water has undertaken extensive investigations to help identify the cause of water seepage. This has included extensive Active Leak Detection in Mayfield and Mayfield East, pressure testing of Hunter Water’s mains, and the deployment of data loggers within our network to identify potential leaks and breaks. To date, we have not identified an issue within our network that would cause the issue … is experiencing. It seems most probable that this issue relates to ground water and this historic mine voids in the vicinity of .. property.”

A short walk along high mine subsidence damage streets show many repairs on Hunter Water services with ongoing problems. How do you keep explaining that broken Hunter Water services do not have an influence on water in the mine network?

Today, we found water flowing out of a tree on Ingall Street Mayfield. We understand other services on Ingall Street have been repaired a number of times this year. We also found extensive damage on other streets.

Hunter Water was invited to a round table meeting to discuss mine subsidence in the Mayfield region. They did not attend.

Omara Street Mayfield – 30 Repairs and Counting…

We have taken a short walk opposite our building on Omara Street Mayfield. It shows a tremendous amount of asset/road repairs along the street.

Checking historic evidence, it shows that many of the Hunter Water services have been repaired many times over the years. Right now, it shows another repair service handled by Hunter Water.

Mayfield is in a high mine subsidence district. Hunter Water and Newcastle Council assets are continuously breaking with water then flowing into the legacy mines which them flows into our properties. There is extensive evidence (historic) about multiple problems in this area.

Both Hunter Water and Newcastle Council are ignoring requests to help with a solution for the overall problem (the legacy mines problems). Both agencies have referred us to look for a solution from the NSW Government’s Legacy Mines report on our properties – this report suggested broken pipes are feeding the abandoned mine network and this water flows into our buildings.

Beside damage to us, we have talked with a number of home owners who have subsidence damage on these same streets. The re-active (not pro-active) attitude of all agencies continue to waste our money – it keeps being explained to me, everyone stays in their lanes – when the road needs repairing, Newcastle Council will repair the road. It does not necessarily look on what has caused the problem, but they will keep repairing the same damage over and over.

Omara Street Mayfield 30

Omara Street Mayfield 30

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Omara Street Mayfield 29

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Hunter Water Leak Repair on Omara Street Mayfield

Hunter Water Leak Repair on Omara Street Mayfield

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Omara Street Mayfield 01

Tarin Street Mine is the Water Source?

We take up the story in January 2015 where water is streaming inside our warehouse from under Maitland Road, Mayfield. At this time we don’t fully understand where the water is coming from but the intensity has increased and flowing from a number of locations out of the soil wall. One submersible pump is not enough to remove the water, so we installed 2 pumps. In this video water is not only coming from multiple locations to the left, but also from the centre of the soil wall, and, from the right of the soil wall. We contact Newcastle Council, and chase very hard for support. At the end of 8 weeks chasing…”XXX is the first point of contact, but he is on holidays”.

Many months later, and having no clear response from Newcastle Council, we ask help from both the Mayfield Business Association and lobby Councillor Tierney to investigate the situation. Newcastle Council’s ultimate findings are;

• An old 1960’s telegraph pole is the cause of the sinkhole in front on the property along Maitland Road. This was also the cause of the sinkhole in 2012 (according to Newcastle Council), and Newcastle Council will again say that this telegraph pole is the cause of another hole in 2019 and 2020. More about the moving telegraph pole later.

• That possibly underground mine workings in Tarin Street might be the cause.

• The case was then closed by Newcastle Council.

And from freedom of information records, Newcastle Council notes are as follows;

I advise that a review of Council records reveal no underground drainage assets are located across the frontage of your property and there are no council assets in the vicinity of the property that would result in water infiltration into the building.

In addition I can confirm that we are drainage pits across the road, however they do not run towards the property, furthermore there is a drainage easement located at 44 Maitland road which is a significant distance away from the property and is down slope from the property.

As such the seepage flows within your property are possibly emanating from old mine workings or an underground spring, and is not associated with the underground pipe drainage system.

Green dye that was placed in the stormwater network across the road found its way into our property.

Tarin Street Mine

Tarin Street Mine Water Source ?

Daily Maintenance to Keep Doors Open

Whilst our 38 Maitland Road Mayfield property is completely out of action, we still need to handle daily maintenance on this building as well as at the other buildings. This includes daily jobs such as mopping up excess water, cleaning pipes/pumps or solving subsidence issues – when door jams no longer can open/close properly, we are continuously adjusting hinges, door jams, and door locks in order to keep the office open.

In today’s photos we are showing the cleaning of the submersible pumps and hoses. If we do not handle this work, water immediately fills the properties with brown sludge that then travels through the carpark and onto the road making it very slippery and dangerous.

 

Mine Water Staining Pipe

Mine Water Staining Pipe

 

Mine Water Staining Pump

Mine Water Staining Pump

Take A Closer Look – Road Repairs

Its hard enough to have Newcastle Council repair a pothole.  So how do you explain rows and rows of streets being repaired in our area?

If we had an open and transparent mine subsidence authority and related government agencies, we could quickly cross correlate data showing public assets (stormwater, sewer, drinking water, data cables, etc..) and how the legacy mines are impacting on these services.

What is Newcastle’s pro-active mine subsidence policies for the old abandoned mine network – or, do we wait for damage first, then repair, then wait for the damage to return, then repair again….?

 

Mine Subsidence Road Repairs

Mine Subsidence Road Repairs? – Mayfield East

 

Subsidence Repairs Tighes Hill

Subsidence Repairs Tighes Hill?

 

Tighes Hill Road Repairs

Tighes Hill Road Repairs?

 

road repairs Mayfield

Road Repairs Mayfield?

 

road repairs Mine Subsidence

Road Repairs Mine Subsidence