Karangahape Minutes 9 December 2021

MINUTES DATE

9 December 2021

TIME

3 PM

LOCATION

Microsoft Teams

STAKEHOLDER TE CLG

6 Attendees on TEAMS ATTENDEES

SUBJECT

Jonathan Hill, Simon Mitchell, Johanna McIntosh, Joe Bowles, Deirdre Fitzgerald, Eva Brosius, Michel Coup, Kate Gullery, Anna Guise

Karangahape Station public realm consultation update

Purpose To provide information regarding: • •

Share progress made from the past year and key milestones for Mercury Lane and Beresford Square design.

Provide a heads-up as to what to expect in the New Year.

Agenda Brief welcome – Simon Mitchell, Community Manager A Year in Review - Jonathan Hill, Project Manager Environment – Kate Gullery, Environmental Advisor Sustainability - Anna Guise, Sustainability Advisor Beresford Square – Michael Coup, Senior Project Engineer, Beresford Mercury Lane - Eva Brosius, Project Engineer Mercury Lane Tunnels - Cam Butcher, Construction Manager Mined Tunnels The End Results - Jonathan Hill, Station Manager Karangahape Station 3:45 - Discussion and questions Subject matter experts will be available to answer questions Meeting notes Highlights and a Year in Review - Jonathan Hill

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This year we reached many milestones even with the COVID delays. They included: • • •

•

The Mercury Lane Station box reached grade level (its deepest point) and most recently Beresford Square reached B4.

The mined tunnel breakthrough - now all of the tunnels connect through Mercury Lane.

The TBM Dame Whina Cooper arrived and has already moved on towards Aotea Station where she is expected to arrive early in the new year.

We also said farewell to our two road headers - Jean Batten and Dame Valerie Adams – which excavated the mined tunnels, together removing approximately 84,000 tonnes of sandstone.

Impact of Covid.

In the community

• • • •

A lot of new artwork has appeared around the site making the neighbourhood quite bright The custom designed hoardings and art has been done all by local artists and is reflective of the community Local artists involved include photographer Mark Barber and artists Margarita Vovna, Misery, Paul Walsh to name a few.

Art walk

Beresford Square • • • •

The station crew are working on drainage and the start of the slab construction with a concrete pour completed mid-December.

Once the slab is poured, the team can start the bottom-up wall construction in the western section of the station.

Excavation to B4.

To date we have poured over 3100m3 of structural concrete, fixed over 900t of reinforcing steel and excavated 25000m3 of soil / rock.

Mercury Lane • • • • •

Since 2021 we have excavated 27m down, and removed over 35,000m3 of spoil from L0 to B7 178 rockbolts.

Built three slabs L0, B1 and B2 with a total of 1,078 tonnes of reinforcing bar 3,409 m3 of concrete.

Now that the bottom of the bulk excavation has been reached, we have started to install the drainage.

Mined tunnel has excavated 50,000m3.

Temporary supports within the platform caverns and connecting adits has involved the installation of 7,000 rockbolts and spraying 6,000 m3 of shotcrete.

Environment – Kate Gullery, Environmental Advisor How we manage noise and vibration: •

We area ware that we are working close to businesses and residents and try our best to minimise noise and vibration. We do on occasion cause disruption and we stop works to investigate and look for ways to do it better whenever possible. We encourage residents and businesses to use the 0800 number when disrupted for a quick response.

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• • •

We monitor noise and vibration 24/7 at Beresford Square and Mercury Lane to comply with the standards. Attended monitoring is done by Aecom.

Noisy activities such as hydrovac trucks, rock breaking, vibration rollers, concrete saw cutting are planned in advance, notified and occur during construction hours.

Controls and mitigation measures for noise include: o Noise mats o Eliminating unnecessary noise such as shouting, engines, dropping/banging and scraping digger buckets, tonal reversing alarms choosing quieter machinery o Late weekend start times on/off instead of continuous noise.

Sustainability - Anna Guise, Sustainability Advisor What are the sustainability considerations for this construction?

• Materials Recycling and reuse • Construction energy • Water use Beresford Square – Michael Coup, Senior Project Engineer, Beresford What's coming next year: • • • •

Dec 2021 - Feb 2022 - Complete Top Down Construction Construct B7 to B4 Level March 2022 – June 2022 Construct B3 to L0 West Walls Construct Remaining Structure July 2022 – January 2023 Ready for Fitout

Mercury Lane– Eva Brosius, Section Engineer Mercury Lane What's coming next year: • • • • • •

Pour B7 slab – shown in blue at the bottom of the station Pour B7 – B4 walls & columns Pour B3 & B4 slabs Pour walls B4 – B2 Complete bottom up construction Construction of the superstructure at the Mercury Lane entrance

Mined Tunnels - Jonathan Hill, Station Manager Karangahape Station What’s coming next year: • • • •

Now that the excavation is completed the focus will go on the permanent structures for the platform tunnels and intersections.

Steel formwork that has been procured from China, Italy and Turkey will make its way to New Zealand in the new year. It will be fabricated inside the excavated tunnel, and a concrete lining will be poured up to 600mm thick.

Work will also continue with the tunnel waterproofing and reinforced bar instillation. Every junction inside the station requires reinforced steel to strengthen the intersection of the Adits and station entrances.

The TBM will once again pass through the station on its second trip towards Aotea Station. This will be the last time we see the TBM. The tunnel team will come in behind the TBM and build the 4 cross passages that will link the two tunnels together.

The End Results - Jonathan Hill, Station Manager Karangahape Station •

Review of urban realm slides of finished stations 3

•

Site safety over the holidays

Q and As •

How many instances have been recorded of noise and vibration in excess of the stated standards? Were the works at Samoa House lane included in the monitoring?

More people have moved out of The Beresford because of the noise and vibration. o

R: Our monitors pick up exceedances in levels from a range of sources, many of which are not related to the project. Things like car horns, sirens, noisy engines, and even late-night shouting can all result in an exceedance.

If it is project related, we review mitigation and management strategies to ensure best practical option. We can say if there is an exceedance alerts are immediately sent to the environmental team who are able to respond and check what is causing the exceedance. Mitigation strategies include, changing our approach, change machinery, install noise mats, or work intermittently when the noisy work is required. The construction noise limits are different from daytime hours to night-time. Acceptable levels under which we work are different from day to night-time.

o •

Yes, Samoa House Lane is included in the monitoring area.

When will the processing of spoil conclude in Beresford Square? The associated dust is impacting the surrounding buildings. Has the Alliance considered a contribution to washing buildings as mitigation? o

R: Excavation in Beresford Square is expected to conclude in April 2022. To date there is no verified link between the works and reported dust.

Washing buildings is not currently within our scope. Cleaning of the business’s facades (below the canopies) in Beresford Square is in scope and they are cleaned quarterly.

•

Ideally for local businesses this work would take place ahead of station opening asked "Are there plans we can see for the interface and integration of the edges of the station with the surrounding laneways and streets (in liaison with AT and Panuku)? o

R: Both AT and Panuku have been contacted regarding the request of CLG to be involved in consultation for the interface of the edges of the station and surrounding laneways. AT has advised they will be in contact with the KBA in the new year to discuss a consultation approach.

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•

Are the architectural works anticipated to be more, or less noisy and/or disruptive for residents than the construction phase? o

R: Generally speaking, the architectural works may be less disruptive than excavation, but there will be construction noise associated with building the superstructure and stations levels beneath the ground. The noise will be different.

•

The cleaning of the buildings once the dust has settled is important to us. Is there any date yet for the removal of the hoardings around Pitt St and our building? o

R: Cleaning of the businesses facades in Beresford Square is in scope and they are cleaned quarterly (below the canopies). Hoardings are unlikely to be removed until works relating to the urban realm construction are underway, this is programmed to begin in end 2023 through 2024.

•

I was surprised to see no bike racks at Beresford Square. Is this the case? It seems to me that overseas bikes on trains is a big thing and needs to be encouraged here too. Safe bike racks is important to this change. o

R: Yes, there will be 10 bike racks in Beresford Square.

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