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Locals concerned – street closures for months till broken sewage pipes replaced

Report from RNZ by Karoline Tuckey
Parts of central Wellington will remain at a standstill for months as authorities admit they still don’t know how to fix a key part of a sewerage collapse in the central city.

A major sewerage pipe caved in days before Christmas at the corner of Willis and Dixon streets, leaving workers pulling long hours to stop millions of litres of sewage spilling into the harbour.

The work, including containing the waste and setting up a temporary pipe, has closed sections of key roads which remain blocked as the city returns from holidays.

But Wellington Water says plans to fix one section will not even be drawn up for several months.

Exasperation was clear at a public meeting last night for people affected by the road closures and engineering work, who gave a crisp “do better” message to the agencies involved.

Fears over emergency services access

Having asthma and heart trouble, Dixon Street resident Cathy Mills needed an ambulance, but with the road closures paramedics had trouble getting to her apartment building.

“I rang for the ambulance, they were on the line – they were a bit stressed out about it, they kept calling me back saying ‘the ambulance is on the way, the ambulance is on the way, how are you?’ and I was sitting at the door in a real bad way,” she says. “It’s only from Newtown to my place, and my sister can normally get me there in 10 minutes – it was delayed by a long way. When they finally got there they said they didn’t realise Dixon Street was closed, and they had to Google on the map to find a way to get back down to where I was.”

“We are left in the dark. Can’t council send letters to residents to keep them up to date?”

Another man at the meeting voiced concern about whether fire trucks could face delays if there was an emergency.

City GPs practice manager Lorraine Wood said ambulances have been delayed from reaching them, though an alternative route through a congested back lane has been established.

“We can’t get ambulances and other things into our practice, which is quite a problem. And it makes it hard for patients to come and see us, they aren’t aware of what’s going on, they find they can’t get car parks. It’s hard for them to reach us and they’re late, our doctors are then finding it hard to run to time, and that creates tensions.

“Our experience with [communication about this] hasn’t been fantastic, but we’ve had the meeting tonight and we understand communication is going to improve, so we look forward to that.”

Businesses cut off from customers

Knit World owner David Goldingham said stores behind the roadworks weren’t getting foot traffic, and some business owners are becoming increasingly desperate. He said an advertising scheme was needed, so people know they’re open.

“I am concerned, because people get toward that part of Willis Street and think they can’t carry on further – you can still get to businesses in that part of Willis Street that is closed to traffic – parking might be an issue, but you can still get there on foot.”

Another business owner at the meeting told the agencies staff she had been loosing customers. “People do generally think that you’re closed because of this,” she said.

How long will it take?

Project director Ian McSherry from Wellington Water said the difficult and “risky” part of the job was decommissioning the original collapsed pipe on Dixon Street, which could take months before a plan could even be drawn up.

“It’s 22 metres deep at the top end, dealing with things at that depth is complex and quite hard to do and bespoke, so we want to take our time, do proper risk analysis, and have a proper robust plan before we go in there and start doing any physical construction work.

“That’s risker. It’s still very early days on that project, we don’t at the moment have a solution. We are hoping to have a concept of how we’re going to deal with it in several months.”

Geotechnical work to find out more about the ground around the collapse is underway, but parts of Dixon Street are expected to remain behind barriers for some time.

The second half of the job is replacing the temporary above-ground pipe on Willis Street with a permanent underground pipe, which begun this week. This is expected to be straightforward and to be done within a few months, McSherry says.

“That’s bread and butter for us – laying pipes in the streets … we’re trying to get Willis Street back up and running as quickly as possible – we’re hoping a number of months for Willis Street.”

The new permanent pipe will run from the intersection of Willis St and Dixon St, down Willis St and onto the obsolete State Highway 1 offramp at the end of the Terrace Tunnel, he said.

While work moves ahead the closures in Willis Street will progress down the street leaving only part of the road closed at any one time.

Better communication planned

Wellington Water’s Alex van Paassen acknowledges there have been communication problems.

“With this project – what you normally take six, 12 or 24 months to do, we’re trying to smash it through in two – so one of the consequences of that is that stuff that would normally happen in sequence is happening together, so it’s easy for people get left behind. So, we change the fences around one day, the emergency services driver might not have got that update that day.”

But he said new staff had been hired to help with this, and regular letters updating residents and other organisations have begun.

Van Paassen said another public meeting would be held in the next few weeks with more updates, and to hear about issues people were experiencing in the area.

9 comments:

  1. Brendan, 15. January 2020, 9:27

    What do you expect in bureaucrat land! If Wellington was ‘Can Do City’ instead of ‘Analyse This Capital’, the sewage pipes would be fixed in a week!

     
  2. Keith Flinders, 15. January 2020, 9:57

    The comments emanating from Wellington Water over this sewer situation has me thinking that they don’t have the engineering expertise to design a longer term fix. I see another bustastrophe type disaster in the making, with a series of public meetings until they wear down the long-suffering public.

     
  3. michael, 15. January 2020, 10:01

    What about the city council’s responsibility in this? Given the council have contracted out their core infrastructure responsibilities and built up a big communications department, why don’t they do some communicating instead of staying in the background and letting Wellington Water take the flack.

     
  4. Peter Kerr, 15. January 2020, 12:43

    So the sewer IS 22m deep at the top end of Dixon Street. I can quite understand the difficulty in designing an excavation and work plan for this part of the project.
    In another post about this, 20m depth was reported and I queried it, thinking it might have been a misprint of 2.0m.

     
  5. Roy Kutel, 15. January 2020, 13:17

    I wonder if Light Rail tracks (if it’s ever going to happen) can be considered (even put in) whilst the sewers are being redone?

     
  6. Casey, 15. January 2020, 13:23

    So if the pipes are 22 metres below the surface at Willis/Dixon, where are the pumps located that feed the sewage out to Moa Point? When constructed in the 1930s, the sewage was directly discharged into the harbour, but exactly where I don’t know. Sea level is 16 metres below the surface of Willis/Dixon and it would seem unlikely given the available fall that the material would have had to be pumped up 6 metres at the discharge point. Who holds all this information and can the public view it ?

    If I was running Wellington Water, I would be making calls to the Chinese and Japanese embassies soliciting engineering expertise to get a viable solution ASAP. Those two countries don’t mess around when it comes to fixing infrastructure, unlike we do here.

     
  7. Graham Atkinson, 15. January 2020, 16:18

    Casey, the pipes are 22 metres below ground at the top of Dixon – only about 3 – 4 metres below ground at the Willis/Dixon intersection.

     
  8. Morris Oxford, 16. January 2020, 14:13

    In some places the pipes are so far below sea level that you have to pump the sewage upwards in order to get it properly into the harbour. A shocking design really.

     
  9. Kerry, 17. January 2020, 8:58

    The deep pipes are large, designed to carry water to Moa Pt, without pumping. They have to be deep in places — sometimes in tunnels — but not below sea level: the ground is high, not the pipe low.
    The old harbour discharge outlets have not been used (except in emergency) for a very long time. The water is now pumped up to the large pipes, then pumped again from Moa Pt Road up to the sewage treatment plant near the airport.
    There used to be a main drain overflow in Adelaide Rd, running down the stormwater system into the harbour, and it may still be there.