section c sector design concepts - nz transport …...section c sector design concepts western ring...

Section C Sector Design Concepts

C–61Western Ring Route – Waterview Connection Urban and Landscape Design Framework Beca • Jasmax • SBEL • NZTA June 2010

C7 Sector 7 Great North Road Underpass

C7.1 Existing situation

Sector 7 refers to the cut and cover section of the

project linking the northern end of the deep tunnels

(Sector 8) with the northern portal at Waterview

Park, crossing beneath Great North Road. For the

purposes of urban and landscape design mitigation

it includes Waterview Primary School.

C7.1.1 Movement and connectivity

An existing pathway extends through the Oakley

Creek Esplanade (beginning in Sector 5 and

terminating at Harbutt Reserve). There are no

formed connections to this walkway in the sector

An existing off road cycleway along the eastern

side of Great North Road connects to the SH16

cycleway

Great North Road provides a hard, traffi c dominated

edge to the residential area of Waterview and severs

it from Oakley Creek to the east

Pedestrian and cycle amenity along Great North

Road is poor. Council has identifi ed a substandard

section of the SH16/SH20 cycleway link along Great

North Road (between the existing shared path and

Phyllis Street Reserve)

Waterview is severed from the Point Chevalier

shops by SH16 and the associated ‘urban gap’.

C7.1.2 Landscape, planting, views

Oakley Creek runs through a deeply incised valley

west of the Unitec Campus. The topography and

vegetation along the creek contributes to the

strong sense of enclosure of the creek corridor itself.

Riparian planting forms a green backdrop to the

immediate urban context. A 6m high waterfall is an

unusual and distinctive feature

Street trees and planting in front gardens on

streets running off Great North Road create a well

vegetated ‘suburban’ neighbourhood character

Waterview Primary School, between Oakley

Avenue and Herdman Street, has views towards

the proposed interchange works.

C7.1.3 Urban form

Waterview is a post-war state housing suburb with

single and two storey dwellings. The coastal edge

and the North-Western Motorway (SH16) provide

strong boundaries to the area to the north. There is

a lack of commercial ‘heart’

The existing houses between Great North Raod

and Waterview Primary School currently buff er

the school and the kindergarten from traffi c noise.

Their demolition for motorway construction will

remove this buff er and also widen the ‘urban gap’

between the community and the Point Chevalier

neighbourhood centre.

C7.1.4 Open space amenity

Saxon Reserve edged by Saxon Street, Alfred Street

and Oakley Avenue is the only other public space

asset (than Waterview Park) readily available to the

local community. It contains a playground. The

Reserve is limited in its usefulness and fl exibility by

its small size

Limited crossings over Great North Road to the

Oakley Creek network and thence to the facilities

in the Unitec campus restrict easy access to open

space.

1616

1616

1616

Western Ring Route Waterview Connection

C–62 Western Ring Route – Waterview Connection Urban and Landscape Design Framework Beca • Jasmax • SBEL • NZTA June 2010

Photo 7–1 Photo7–2

Figure C-7.1: Sector 7 existing plan

Photo7–3

Photo7–4

Photo7–5



Figure C-7.2: Photo 7–1 View from Waterview Primary School north towards proposed interchange Figure C-7.3: Photo 7–2 Oakley Creek walkway, showing recent revegetation planting and pathway works

Figure C-7.4: Photo 7–3 View from Herdman Street towards Waterview Primary School

Figure C-7.5: Photo 7–4 Six metre high waterfall on Oakley Creek

Figure C-7.6: Photo 7–5 Saxon Reserve



C7.2 Design concept

C7.2.1 Movement and connectivity

No long-term change is proposed to the functioning

of Great North Road nor the adjoining streets, as the

cut and cover tunnel runs under this sector

While there will be impacts on Great North Road

and the cycleway during construction, all existing

connections will be maintained

The project does not preclude Auckland City Council

from upgrading the substandard section of the

cycleway network on Great North Road

A new pedestrian bridge (Oakley Bridge), while

not part of the core project, could support a link

between the Waterview Community and the

sportsfi elds and other open spaces wtihin Unitec,

and enable an extension of the off -road cycleway.

C7.2.2 Landscape, planting, views

Landscape treatment will partially screen the

ventlation building.

C7.2.3 Urban Form

Housing along Great North Road will be removed

to accommodate the cut and cover section of the

tunnel. The proposed single storey ventilation

building in Option A (refer Figure C-7.8) is of a

similar height and depth to the housing stock,

but is a much longer structure, extending across 7

residential lots. The building will screen the school

and its grounds from traffi c noise along Great North

Road.

C7.2.4 Structures

Ventilation building and stack

– Options were explored for locating the

ventilation building and stack. Option A is the

option to be consented and comprises a partially

buried ventilation building with an above-

ground section running along Great North

Road between Herdman Street and Oakley

Avenue. The stack is to the west and slightly

south of the ventilation building, between it

and the school (see photomontages and plans

and sections following in Figures C-7.7 – C-7.11).

The viewpoint for the ‘before’ and after’

visualisations is shown on the location plan

aerial opposite.

– An alternative option (Option B) locates the

ventilation building fully underground and the

stack within Oakley Reserve. This option was

developed because of its reduced visual impact

and because it enables a future treatment of

the western Great North Road edge more in

keeping with the neighbourhood scale, and

more fl exible in terms of future uses. Option B is

illustrated in Figures C-7.12 – C-713).

C7.2.34 Open space amenity

Auckland City Council and the community

requested the NZTA to investigate a new

pedestrian bridge (Oakley Bridge) connecting

Waterview and Unitec to enable comunity use

of the sporting and open space facilities. While

not part of the core project, the bridge could be

pursued in future by ACC in partnership with

Unitec as part of their campus planning.

PROPOSED VIEWSEXISTING & PROPOSED VIEWS

Figure C-7.7: Artist’s impression of ventilation building and stack – Great North Road option (Concept Option A)

BEFORE AFTER



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Service vechicles IN

Service vechicles OUT




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Option 4 - Location plan

1

Figure C-7.8: Ventilation building – location plan (Concept Option B)

444270 42

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Figure C-7.9: Ventilation building – Great North Road (Concept Option A); basement level



GREAT NORTH

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Figure C-7.10: Ventilation building – Great North Road (Concept Option A); ground level plan Figure C-7.11: Ventilation building – Option A; cross section



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Figure C-7.12: Ventilation building – Oakley Reserve location plan (Concept Option B)



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SERVICE LEVEL PLAN LONG SECTION

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Figure C-7.13: Ventilation building – Concept Option B plans: Fan Room level and Service level

Figure C-7.14: Ventilation building – Concept Option B long section



4000.000

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A1 A2 A3 A4 A5

B1

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3D VIEW 1

3D VIEW 2

3DVIEW 4

3D VIEW 3

3D VIEW 5

3DVIEW 6

A6

12000 22000

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34000

3000

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7500 27000 34000 27000 7500

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CONCRETEABUTMENT

CONCRETEABUTMENT

CONCRETEPILE CAP

UC PIERS

TIMBERDECKING

FOOT PATH

Plan 1 : 1000

_LEVEL 1

1

Plan 1 : 500

_LEVEL 2

2

Oakley Bridge has been proposed by the community

and ACC to support pedestrian movement between

Waterview and the Unitec campus. Like the Phyllis

Bridge, it should be a simple, elegant structure with

minimal impact on the sensitive creek environment.

The design concept has it bridging Oakley Creek at a

high level for fl at walking grades and maximum ease

of travel / accessibility

Figure C-7.15: Oakley Bridge – location and concept plan



3D View 1

3D View 2

3D View 3

3D View 4

3D View 5

3D View 6

Figure C-7.16: Oakley Bridge – 3D views showing possible future form and setting in the landscape



Saxon Reserve will be extended as part of this

project, to provide an area of open space to

complement the reconfi gured Waterview Park

The urban design team developed a draft concept

design (Figure C-7.18) to illustrate how the park

might be extended and upgraded.

Figure C-7.17: Saxon Reserve - existing plan Figure C-7.18: Saxon Reserve - concept plan

section c sector design concepts - nz transport …...section c sector design concepts western ring...

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