Mt Eden CLG meeting 24 February 2020
Agenda • Welcome • Progress on site since our last meeting • Portal piling and trial blasting works • Other upcoming works at Mt Eden • Porters Ave level crossing closure • Mt Eden Station closure • Our main works programme • TBM naming competition
Progress on site
• Diverting Flower Street creates the space necessary to build the CRL tunnel portal under the Flower/Nikau St intersection. • Flower St will re-open next month and the section of Shaddock Street within our site will close.
• Demolition largely completed • Geotechnical investigations continue to inform ground conditions ahead of construction • Utility investigations continue ahead of relocation works
• Our concrete crusher is pulverising concrete waste from demolition, re-using it to create temporary roads for the construction site and reducing the amount of waste taken to landfill and truck movements to and from site.
Portal piling – what is it and why are we doing it? • Piling is required to create the portal
that the Tunnel Boring Machine (TBM) will launch from.
• Involves use of large equipment,
including a piling rig and crawler crane.
• The rig and crane will sit on tiered earth platforms on the hillside at the intersection of Flower and Nikau Sts.
• The rig will drill 66 piles at depths of 8 to 40 metres to retain the ground.
Portal piling – how is it done? • Piling rig drills into the ground using an auger inside metal tubular casings to form pile shaft • Once shaft is drilled, the crawler crane lifts large metal cages into the shaft • Concrete is then pumped into the caged shaft, creating the pile. • Piles are then connected by rows of waler beams to create a retaining wall that forms the ‘face’ of the tunnel portal.
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What to expect from piling • Noise, vibration and increased truck movements on site We’ve selected quieter method of piling – drilling the piles into the ground, rather than hammering them in.
• Concrete trucks making regular deliveries to the site, with several deliveries expected per day
• Regular deliveries of the large metal cages, which will be in sections of up to 15 metres in length
Managing the impacts of piling Monitoring noise, dust and vibration - monitors in place that will alert us if we exceed set limits. We’ll also be:
• Using attended monitoring during first piles to
measure noise and vibration levels and make any adjustments to our methods
• Receiving delivery of the large metal cages within normal working hours where possible
• Scheduling concrete deliveries within normal working hours where possible
• Keeping you informed and giving plenty of advance
notice of any works outside of normal working hours
Trial blasting of basalt rock Late March/early April, we’ll be doing trial blasting of basalt rock in two locations within our construction area.
• Trial blasts used to gather information about local geology.
• Results determine appropriate blast sizes,
patterns and sequences to manage vibration levels.
• Results also help us plan for effective removal of basalt when excavation begins
• Blasting has the benefit of avoiding noisy and prolonged rock breaking.
What to expect from blasting • To fracture the basalt, a series of controlled blasts will be needed, using small charged explosives. A dull ‘thud’ may be heard or felt nearby. • Blasting will only be undertaken within the same window of time each day – 10.32am and 2.32pm – both of which sit outside MediaWorks sensitive broadcasting times.
Blasthole drilling rig
• Primary effect associated with blasting is ‘startle’ - being surprised by unexpected noise or vibration. This is alleviated by being aware of the windows above and listening for an audible siren 5 minutes, and then 30 seconds prior to the blast occurring. • We’ll communicate what’s happening well in advance.
What other early works are coming up in Mt Eden Demolition of 28 Mt Eden Rd & 11 Water St• • 2 March - 28 Mt Eden Rd • 9 March - 11 Water St This land required for construction of the CRL Line between Mt Eden and Normanby Rds.
Tree removals • 32 Normanby Rd – exotic trees between carpark and rail corridor boundary - 28 February • Fenton St - 7 pohutukawa trees to be transplanted in Western Park – late March/early April Preparation for Fenton Street utility relocations Removing on-street parking and starting earthworks to create extra construction space ahead of utility diversions - likely to start just before Easter. Mt Eden Road utility relocations Delayed until about June/July, due to construction design changes for the Mt Eden Rd bridge. Bridge construction now expected to happen September 2020.
Porters Avenue Level Crossing closes to vehicles – Easter (10 April) 2020 Permanent closure to enable Link Alliance to integrate CRL with the Western Line while improving rail safety • Porters Ave & Wynyard Street will become cul-de-sac streets • Pedestrians and cyclists will still be able to cross in the area • Wayfinding signage will be installed • During Queen’s Birthday weekend, protective gates will be installed to provide safer crossing for pedestrians and cyclists until the new Porters Ave overbridge is built in 2021 • New North Rd / Porters Ave intersection has a poor crash record. Closure expected to improve intersection safety. • Will enable more frequent trains once CRL opens.
Mt Eden Station closure – 30 May 2020 Mt Eden Station will close for about 4 years to enable Link Alliance to build the City Rail Link. • Trains will run through Mt Eden on one line (referred to as ‘single line running’) to ensure enough space to safely complete construction on the opposite side of the rail corridor without delaying freight and passenger services • If trains were to stop at Mt Eden, it would create a “stop/go” effect on the Western Line. The frequency of trains would then need to reduce - affecting thousands of train users across the network every day.
• Rail construction site extends Dominion Rd to Khyber Pass - a temporary platform between neighbouring Kingsland and Grafton stations not feasible
• If you catch the train to/from Mt Eden station, or use it as a walking connection, you will need to re-think your journey. We’re working closely with AT to ensure there are public transport alternatives available.
Mt Eden Station closure – 30 May (Queen’s Birthday weekend) 2020 Key reasons for needing to close the station • It’s the only way to guarantee public and worker safety during construction. If trains were to stop at Mt Eden, it would require people to enter a live and complex construction site. • Our construction works and design of future station means existing access points (Mt Eden Rd ramp and Fenton/Ngahura level crossing) need to be permanently removed. The gated entrance to the new station will be on Ruru Street. • Existing Western Line platform will be demolished and rebuilt to accommodate an overbridge from the new station and longer nine-car trains. CRL Line gets its own platform, accessed from a different area of the new station.
Mt Eden Main Works Planning Approvals OPW and DWPs
17 October 2019
C5 Programme to Date Normanby Rd Early Works
Ground Improvement Early Works
Utility Diversions and Temporary Bridge
For retaining walls between Normanby Rd and Mt Eden Rd.
• Council recommendation received on 21 Feb 2020
• Construction starts this week
• Updated CEMP and prepared ITA EMP • Submit to Council for certification this week
Main works
• All other works/structures/walls • Draft OPW and DWPs to AC: May 2020 • Lodge June 2020 • Construction start - July 2020 16
Mt Eden Main Works Overview – Western Line integration
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Mt Eden Main Works – DWPs and MPs -
Construction Environmental MP Urban Design DWP Traffic, Access and Parking DWP Air Quality DWP / Air Quality MP Communication and Consultation Plan Social Impact and Business Disruption DWP Tree and Vegetation DWP Heritage Character DWP (Archaeology) Heritage Character DWP (Built Heritage) Construction Noise and Vibration DWP Contamination DWP / Contaminated Soils MP Erosion and Sediment Control Plan Industrial and Trade Activities Environmental Management Plan Groundwater and Settlement Monitoring and Contingency Plan 18
Engagement with the community on our main works at Mt Eden Social Impact & Business Disruption (SIBD) engagement February - March 2020 Specialist reports February - April 2020 Mt Eden CLG Review April 2020 Lodgement End of May 2020
Main works: Key activities and indicative dates for Mt Eden rail corridor works Eastern-Facing Connection (east of Mt Eden Rd towards Normanby Rd) Activities
Indicative Dates
Construction of retaining walls required for rail trenches
Q3 2020 – Q4 2022
Construction of temporary utility services bridge over Normanby Rd level crossing
Q3 2020 – Q4 2020
Construction of split-level cross-over structure, which will enable trains to connect to the new CRL line
Q4 2020 – Q4 2021
Bulk earthworks for rail trenches
Q1 2021 – Q4 2022
Construction of Normanby Rd road-over-rail bridge. Normanby Rd will close for Q3 2021 - Q2 2022 about six months to accommodate this work Realignment of Boston Rd / Normanby Rd / Nugent St roundabout
Q2021 – Q2 2022
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Mt Eden Rd to Fenton/Ngahura St-end of station platform Activities
Indicative Dates
Closure of Mt Eden Station
30 May 2020
Construction of additional Mt Eden Road bridge for CRL Line
Q2 2020 – Q3 2021
Demolition of existing Western Line platform and staged construction of an extended and realigned platform
Q1 2020 – Q4 2022
Construction of the new Mt Eden Station building
Q1 2021 – late 2022
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Western-Facing Connection (from Fenton St towards Porters Ave) Activities
Indicative Dates
Closure of Porters Ave level crossing
10 April 2020
Track removal and construction of rail trench and rail cross-over structures
Stages from Q3 2020 – Q1 2023
Construction of Porters Avenue overbridge
Q3 2020 – Q3 2021
Staged reinstatements of Fenton Street after utility relocation works and footbridge construction
Q4 2020 – Q3 2022
Construction of Fenton Street to Ngahura Street overbridge
Q1 2021 Q3 2022
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Key activities and indicative dates for Mt Eden station area works Activities
Indicative dates
Construction of an additional Mt Eden Road bridge, located September 2020 north of the existing on, to enable a rail trench for the CRL line to be built underneath Construction of a new Ruru St bridge. The bridge will eventually have a CRL platform underneath it.
Q3 2021
Launch of the TBM from the Mt Eden tunnel portal
February 2021
Construction of new Mt Eden Station building
Q1 2021 to late 2022
Public realm enhancements
From 2023
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Traffic Management – Mt Eden Main Works Mt Eden Station closure - Jun 2020 to Dec 2024
Normanby Rd level crossing closure
• New 640 service: (Kingsland Station TBC) ↔ Valley Rd
Select weekends and nights in 2020 and from Sep 2021 – Mar 2022
↔ Mt Eden Rd ↔ Boston Rd ↔ Khyber Pass Rd ↔ Broadway ↔ Newmarket Station
• Signalisation of Enfield St/Akiraho St/Mt Eden Rd
intersection for bus priority on Mt Eden Rd and safe pedestrian crossings
• New North Rd express services changed to all stops
• Detours in place via Enfield St ↔ Mt Eden Rd ↔ and Boston Rd
• Closures undertaken at different
times to lane closures on Mt Eden Rd to manage traffic impacts
• Additional capacity on existing 22-New North Rd and 24-Sandringham Rd services
• Wayfinding and information signs to/from station area • Signalisation of New North Rd/Ngahura St for
construction vehicle access and bus priority on New North Rd. 24
Traffic Management – Mt Eden Main Works Additional Mt Eden Rd bridge – Sep 2020 to Sep 2021
• Short section of bus lane and flush median removed to maintain one traffic lane each way during peak times
Normanby Rd bridge installation and roundabout upgrade – Sep 2021 to Mar 2022
• Temporary pedestrian bridge over rail line • Roundabout closure during Dec-Jan holiday period, and potential lane closures in the weeks before and after
• Signalisation of Normanby Rd / Mt Eden Rd intersection for turning out of Normanby Rd and bus priority on Mt Eden Rd
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Traffic Management – Mt Eden Main Works – What can you expect? General Traffic Activity
General Access and Parking Response
• Construction trucks – material transport for
• Maintaining vehicle access to private property to
• Support vehicles – commuting of staff and
• Queues and delays on the public road network
excavation and construction of tunnels, tracks and retaining wall
delivery of equipment
• Movement activity around construction site access points:
o Main construction sites: Ngahura Rd, Normanby Rd, Porters Ave
o Minor sites: Boston Rd, Enfield St, New North Rd-Dominion Rd ramp
the greatest extent possible and providing pedestrian access at all times
will be monitored in the AM and PM commuting peaks. Short term works (about 2 weeks or less) will be done between the peaks or overnight.
• Alternative parking areas will be provided to the greatest extent possible to replace any private property parking that is temporarily disrupted.
• Alternative parking will be considered for loss of public on-street parking that directly supports businesses and organisations.
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Construction Noise and Vibration – Main Works
Key matters:
• Builds on the Early Works CNV DWP • Block of Lines works to enable works in rail corridor, including potential night works
• Blasting minimises rock breaking duration • D-wall and bored piling minimise noise and vibration impact
• Engagement with stakeholders • Monitoring of noise and vibration 27
Construction Noise and Vibration Delivery Work Plan Objective is to use the best practicable option (BPO) to avoid, remedy or mitigate adverse effects.
• Staff training • Appropriate equipment selection • Use of noise barriers • Restrictions on night activities • Regular communication with stakeholders • Noise and vibration monitoring
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Tunnel boring machine naming competition!
#digcrl
Naming a TBM is said to be good luck and dates back to the 1500s when tunnellers and people dealing with explosives looked to Saint Barbara, their patron saint, for protection. How the competition works: • Everyone has until 5 March to submit a name • Go to digcrl.co.nz
• Once all votes have been tallied up, people can vote for their favourite of the top 3 names.
• We are looking for names of ground-breaking New Zealand women!
• The name with the most votes wins. • All those who choose the winning name will go into the draw to win.