Portland ERF Design and access statement 4 Building envelope - facade development

4848 Portland ERF Design and access statement

PORTLAND BILL

4949 Portland ERF Design and access statement

BUILDING ENVELOPE - FACADE DEVELOPMENT 4.1 INTRODUCTION

INTRODUCTION

4.1.1 This section sets out the design principles that have been considered to further enhance the design and firmly embed the proposals within its setting.

4.1.2 As noted above the massing has looked to draw inspiration from the geological formations and more recent man made activity that shapes the .

4.1.3 The design of the building’s facade and material selection looks to build on this with inspiration being taken from the distinctive steep escarpments and vegetation of East Weare.

5050 MATERIALS

4.1.4 The massing of the building, as set out in the previous section, has resulted in the creation of two distinct volumes, the RDF store and Turbine Hall and the boiler and Exhaust Air Filtration Room. Whilst the design of the elevations might include further, subtle articulation, it is proposed that the elevational treatment and materials reflects the two volumes to create a calm, simple aesthetic.

4.1.5 It is proposed that one volume is clad in white to light grey cladding reflecting the exposed limestone cliff faces, whilst the second volume picks up on the green scrub vegetation of the lower escarpments helping the building recess into the landscape behind, when viewed from the AONB and WHS.

4.1.6 The following pages look at how the materials should be distributed and the detailed facade design which all combine to create a cohesive building composition.

Exposed rock strata in the quarry east of Grove Road FIG 4.1 FIG 4.2 , PORTLAND WESTERN PORTLAND CLIFF FACE JUST NORTH OF SOUTHWELL BUSINESS PARK Portland ERF Design and access statement

5151 Portland ERF Design and access statement

BUILDING ENVELOPE - FACADE DEVELOPMENT 4.2 MATERIAL COMPOSITION

OPTION 1 GREEN WALL TO REAR

4.2.1 The green cladding is placed on the taller rear volume making this recess into the undercliff behind, leaving only the lower grey clad volume visible from the long distance views from the AONB and WHS.

4.2.2 Whilst still slightly taller the scale of the grey clad volume is comparable and in keeping with the shed buildings of the existing port.

4.2.3 As the taller volume extends further north the green cladding would appear to wrap down the right hand edge of the eastern elevation, as viewed from the AONB and WHS. This could create the separation of the grey volume from the other port buildings and result in the visual elongation of the port when viewed across Weymouth and .

5252

(produced using Google Earth) View from Balaclava Bay

(produced using Google Earth) (produced using Google Earth) View from Sandsfoot Castle indicative views in context View from northern shipping lane

FIG 4.3 MATERIAL COMPOSITION OPTION 1 - GREEN CLADDING TREATMENT TO THE REAR Portland ERF Design and access statement

OPTION 2 GREEN WALL TO THE FRONT

4.2.4 The green, lower volume wraps across the front of the boiler house behind, largely concealing the taller volume and grouping the more visually prominent grey cladding to the north, adjacent to the existing buildings in the port.

4.2.5 Clad in the light grey, the top of the boiler house would be visible from the long distance views in the AONB and WHS. If detailed correctly, this could look like an exposed limestone cliff face, as visible just below The Verne at the top of the East Weare escarpment.

4.2.6 The height of the boiler house coincides with a plateau halfway up the undercliff giving further justification to the positioning of this new ‘exposed limestone cliff face’.

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(produced using Google Earth)

View from Balaclava Bay

(produced using Google Earth) (produced using Google Earth) View from Sandsfoot Castle indicative views in context View from northern shipping lane

FIG 4.4 MATERIAL COMPOSITION OPTION 2 - GREEN CLADDING TREATMENT TO THE FRONT Portland ERF Design and access statement

5454 Portland ERF Design and access statement BUILDING ENVELOPE - FACADE DEVELOPMENT 4.3 MATERIAL DETAILING - HORIZONTAL BANDING

4.3.1 As described above the articulation and selection of materials creates a horizontal band of white/grey cladding that replicates the exposed limestone cliff face at the top of the escarpment.

4.3.2 To pick up on the character of the exposed cliff face, and enliven the design of this elevated section of the building, and western elevation to Incline Road, the design has drawn inspiration from the geological stratification found in the exposed cliff and quarry faces of the Isle of Portland.

CLADDING AN ‘EXPOSED LIMESTONE CLIFF FACE’

4.3.3 It is proposed that the cladding of the boiler and Exhaust Air Filtration Hall will include an abstract interpretation of the limestone cliff faces which have 5555 been created by the sedimentary settlement process millions of years ago and more recently by coastal erosion.

4.3.4 The options on the following pages demonstrate various options that have been considered to reflect the horizontal banding of various depths that are visible in the exposed faces of the limestone.

4.3.5 Later options look at how the finer vertical cleave lines might also be represented in the design of the facade to provide a finer grain and texture to the elevations.

4.3.6 The selection of the materials should reflect the chalky texture of the limestone meaning the use of a fibre cement board or a matt finished painted metal panel/sheet.

Limestone cliff face Cliff colours Cliff strata

FIG 4.5 FIG 4.6 PORTLAND GEOLOGICAL FORMATION - CLIFF FACE ENLARGEMENT- GEOLOGICAL STRATA CLIFF FACE ADJACENT TO Portland ERF Design and access statement

4.3 BUILDING ENVELOPE - FACADE DEVELOPMENT / MATERIAL DETAILING - HORIZONTAL BANDING

STRATIFICATION: HORIZONTAL BANDING

5656

HORIZONTAL BANDING OPTION 1: HORIZONTAL BANDING OPTION 2: PARALLEL STACK BONDED BANDS OF VARIOUS HEIGHTS PARALLEL STACK BONDED BANDS OF VARIOUS HEIGHTS AND RAISED FISSURES

FIG 4.7 GREY CLADDING FACADE IDEAS DEVELOPMENT Portland ERF Design and access statement

5757

HORIZONTAL BANDING OPTION 3: HORIZONTAL BANDING OPTION 4: TAPERED STACK BONDED BANDS OF VARIOUS HEIGHTS TAPERED HORIZONTAL BANDS COMPRISING VERTICAL CLEAVE LINES Portland ERF Design and access statement

4.3 BUILDING ENVELOPE - FACADE DEVELOPMENT / MATERIAL DETAILING - HORIZONTAL BANDING

STRATIFICATION: ADDITIONAL VERTICAL GEOMETRY

5858

PREFERRED CONCEPT IDEA TO BE DEVELOPED FURTHER

HORIZONTAL BANDING OPTION 5: HORIZONTAL BANDING OPTION 6: HORIZONTAL BANDS WITH PROTRUDING CLEAVE LINES HORIZONTAL BANDS COMPRISING ANGLED CLEAVE LINES

FIG 4.8 GREY CLADDING FACADE IDEAS DEVELOPMENT Portland ERF Design and access statement

5959

HORIZONTAL BANDING OPTION 7: HORIZONTAL BANDING OPTION 8: FOLDED STRATA BANDS FACETED BUILDING FACADE WITH TAPERED HORIZONTAL BANDING Portland ERF Design and access statement 4.3

6060 Portland ERF Design and access statement

4.3 BUILDING ENVELOPE - FACADE DEVELOPMENT / MATERIAL DETAILING - HORIZONTAL BANDING

4.3.7 The preferred horizontal banding cladding option is Option 6: Horizontal Bands Comprising Angled Cleave Lines.

4.3.8 In this option the height of each horizontal band remains consistent along its length although the height of the bands varies across the height of the building, as with the rock strata visible on the Portland cliff faces and quarries.

4.3.9 This is further emphasised through subtle changes in colour for each horizontal band reflecting the changes in the sedimentary composition through the height of the limestone.

4.3.10 Whilst the proposed banding and colour SEDIMENTARY BANDING AND VERTICAL CLEAVE EURAMAX SPECIAL PROFILE A/R KOPVAN KESSEL - is similar to Options 1, 2 and 5, Option 6 provides LINES PROFILED METAL CLADDING SHEET EURAMAX SPECIAL PROFILE A/R additional depth to the elevation through the use of PORTLAND CLIFF FACE EXTRACT 6161 angled façade panels. The crease lines of the panels replicate the vertical cleave lines of the cliff faces, whilst THE COLOUR OF EACH HORIZONTAL BAND VARIES SUBTLY FROM THE BAND ABOVE the angled faces play subtly with the light and shade AND BELOW TO REPLICATE THE DIFFERENT as it falls across the surface of the building, creating a SEDIMENTARY COMPOSITION OF EACH STRATA visual depth and interest to the elevation. WITHIN THE LIMESTONE

4.3.11 It is proposed that the external walls will be CONTINUOUS DRIP FLASHING CLOSES OFF constructed from a built-up wall system utilising a THE GAPS OF THE PROFILE AT THE TOP OF PANELS, EMPHASISES THE HORIZONTALS OVER profiled metal sheet as the external weatherproof layer THE LENGTH OF THE BUILDING AND CASTS of the façade. The sheets, which are available in lengths SHADOWS ACROSS THE PANEL BELOW ADDING of up to 7m, would consist of peaks and troughs of DEPTH TO THE FACADE various widths and depths and would be flipped and rotated in various combination to avoid noticeable EURAMAX SPECIAL PROFILE A/R CLADDING repetition over the length of the building. PANEL. THE CREASED FACE AND VERTICAL LINES REPLICATE THE CLEAVE LINES OF THE 4.3.12 A horizontal drip flashing at the top of each LIMESTONE CLIFF FACES THAT BREAK UP AND band will visually create a strong, continuous line that PROVIDE VISUAL INTEREST TO THE FACADE will further accentuate each band when viewed from a THE ANGLED FACES PLAY WITH LIGHT AND distance. SHADE TO CREATE SUBTLE TONES OF THE SAME COLOUR AND PROVIDE ADDITIONAL DEPTH TO THE ELEVATIONS 4.3.13 The polyester powder coated finish of the profiled sheet will be specified to pick up on the colours VARIETY IN THE BAND HEIGHTS REPLICATES and tones found naturally in the exposed limestone cliff THE NATURAL COMPOSITION OF THE face of the island. These will be provided with a matt LIMESTONE CLIFFS AND PROVIDES AN ADDITIONAL LAYER OF VISUAL INTEREST finish to avoid undesirable glare or reflections. CLADDING DETAILING USED TO REINFORCING THE CONCEPT OPTION 6 FACADE DEVELOPMENT STUDY FIG 4.9 PRECEDENT EXAMPLE OF DEEP PROFILE GREY FIG 4.10 CLADDING FACADE CONCEPT DEVELOPMENT Portland ERF Design and access statement

4.3 BUILDING ENVELOPE - FACADE DEVELOPMENT / MATERIAL DETAILING - HORIZONTAL BANDING

4.3.14 The above facade development option creates a striking feature with the depth of the panel creating strong shadows that will vary in length throughout the day and at different times of year.

4.3.15 To ensure that this is not too abstract in its interpretation of the limestone strata a further option has been considered, as demonstrated to the right.

WHITE (RAL 9010) 4.3.16 This option utilises a combination of shallower profiles. The narrower width of the vertical features creates a subtler texture to the facade of the building more in keeping with the texture of the cliff face.

4.3.17 Unlike the previous option, a combination of three different profiles are used to avoid monotony or noticeable repetition across the facade. Grouping 6262 similar profiles allow both intensification or relief from shadows which allows a further layer of variety to be added to the elevation. HAMLET (RAL 9002) SHALLOW PROFILED CLADDING COMBINATIONS AND GROUPINGS 4.3.18 Whilst this option would create variation PRECEDENT PROJECT across the width of the facade the effect is almost too subtle to provide suitable articulation and depth to the facade.

4.3.19 The deeper profile shown on the previous pages has therefore been selected for the final design as the depth of the panel will create a play of light and shadow that will replicate a visible cleave effect when OYSTER (RAL 7035) viewed from close and mid distance views from within the port and harbour beyond.

4.3.20 In the longer distance views the ‘cleave’ effect will become less visible but the variation in colour of the horizontal bands will still be visible, as naturally occurs with the limestone strata exposed at Portland Bill and around the perimeter of the Isle of Portland.

ALASKA GREY (RAL 7000)

SUBTLE VERTICAL FEATURES CREATING DEPTH AND RELIEF TO THE SPECIAL PROFILE A/R FACADE COLORCOAT PRISMA CONFIDEX- CLADDING COLOURS PRECEDENT PROJECT

FIG 4.11 GREY CLADDING OPTION 2 PRECEDENT IMAGES Portland ERF Design and access statement

SAB-Pyramid 37/510

SAB-DIAMOND 40/440

SAB-Pyramid 37/460

ALASKA GREY (RAL 7000)

OYSTER (RAL 7035)

ALASKA GREY (RAL 7000)

WHITE (RAL 9010)

6363

ALASKA GREY (RAL 7000)

HAMLET (RAL 9002)

ALASKA GREY (RAL 7000)

OYSTER (RAL 7035)

ALASKA GREY (RAL 7000)

SPECIAL PROFILE A/R SAB-PROFILE CLADDING PROFILES FIG 4.12 GREY CLADDING OPTION 2 - CLADDING PROFILE COMPOSITION Portland ERF Design and access statement

BUILDING ENVELOPE - FACADE DEVELOPMENT 4.4 FACADE DEVELOPMENT - LOUVRED PLINTH

CONTAINING ODOURS VENTILATION TO SERVICE AREAS views in a similar way to the water stained lower strata of the limestone cliffs found around the southern tip of 4.4.1 To prevent odours escaping from the RDF 4.4.5 Ventilation is required to a number of other the island by Portland Bill. store the building will use the heat of the boiler room plant areas around the perimeter of the building. to draw air out of the RDF store and maintain the These areas include the transformer rooms, Turbine 4.4.9 In the occupied areas of the building which space in negative pressure. Hall and battery rooms. need to be heated and comply with the UK Building Regulations the wall will be constructed from a built 4.4.2 As air is drawn out of the space, new A CONSISTENT AESTHETIC up wall system with a profiled metal sheet to form the air needs to be drawn into the space around the external weathering face of the building. perimeter of the facade. 4.4.6 As ventilation is required to so many areas of the building to fulfil the technical requirements of 4.4.10 In the non-occupied areas a combination BOILER AIR SUPPLY AND COOLING the building function, the elevations will need careful of built up wall system and continuous louvred wall consideration to avoid becoming a patchwork of would be utilised. The colour and external profile of the 4.4.3 To ensure the efficient incineration of the RDF louvre panels. cladding sheet and louvres would match providing a there needs to be a constant air supply to the boiler continuous external aesthetic whilst allowing ventilation room. 4.4.7 To avoid this it is proposed that a continuous to be provided in all the appropriate locations. louvred external envelope is provided to the first 6m of 6464 4.4.4 Additional air flow is also required to help the elevation. 4.4.11 The industrial roller shutter doors that regulate the temperature of the boiler room and so provide access and the exit from the RDF store for extensive areas of ventilation openings are required to 4.4.8 This continuous band around the bottom of deliveries sit neatly into this band, with the horizontal the elevation of the boiler room. the building would provide a continuous aesthetic that components of the roller shutter door mirroring the would help ground the building from long distance horizontal ribs of the surrounding cladding.

BUILT UP CLADDING: PROFILED SHEET TO INSULATED AREAS BUILT UP CLADDING: PROFILED SHEET TO UNINSULATED AREAS LOUVRED FACADE: VENTILATION TO RDF STORAGE AREAS HORIZONTAL LOUVRED PLINTH

FIG 4.13 LOUVRE PLINTH COMPONENTS Portland ERF Design and access statement

CONTINUOUS LOUVRE WALL SYSTEMS

SPECIAL PROFILE A/R EURAMAX CLADDING

6565

HORIZONTAL BANDING (REFER TO PAGES 60-61)

6M HIGH PLINTH

LOUVRED FACADE

PROFILED SHEET TO INSULATED AREAS PROFILED SHEET TO UNINSULATED AREAS

FIG 4.14 LOUVRED PLINTH - CONTINUOUS AESTHETIC Portland ERF Design and access statement

BUILDING ENVELOPE - FACADE DEVELOPMENT 4.5 ‘GREEN’ WALL - OPTION 1 GREEN CLADDING

4.5.1 The simplest and most cost effective solution to create a recessive building would be to use a dark, matt green/brown cladding on the building which picks up on the tone of the scrub vegetation.

UPPER OSPREY GLENCORE

4.5.2 This was the approach adopted for the Upper Osprey Glencore application located just to the south along the Portland coast. Here 3 tones of cladding and a dark grey roof all contribute to the recessive appearance of the proposed industrial sheds.

4.5.3 The Upper Osprey Glencore application visualisations demonstrate the relative success of this approach. However, the flat tone of the façades (produced by Troopers Hill Ltd means that, whilst the buildings do not visually jump for application WP/18/00119/PD) 6666 out, they are still clearly identifiable from the AONB, VIEW OF UPPER OSPREY GLENCORE FROM SEA WHS and from views within Weymouth Bay and .

4.5.4 As the proposed ERF building will be larger than the Upper Osprey Glencore application a lack of tonal variation is likely to further accentuate the visibility of the proposals.

IMPROVING TONAL DIVERSITY

4.5.5 The remaining green wall options look at different approaches that could provide greater tonal diversity and improve how the building blends in with the landscape when viewed from the visually sensitive locations within the AONB and WHS to the east of the site.

(produced by Troopers Hill Ltd for application WP/18/00119/PD)

VIEW OF UPPER OSPREY GLENCORE FROM SOUTH WEST COAST PATH NEAR THE YOUNG OFFENDERS INSTITUTE UPPER OSPREY GLENCORE APPLICATION - LVIA COLOUR RENDERED VISUALISATIONS

FIG 4.15 UPPER OSPREY GLENCORE SUBMITTED LVIA VISUALISATIONS Portland ERF Design and access statement

6767

INDICATIVE VIEW OF THE PROPOSALS USING A DARK GREEN CLADDING SIMILAR TO THAT OF THE UPPER OSPREY GLENCORE APPLICATION

WALLS - NORTHERN SECTIONS OF WAREHOUSE A WALLS - CENTRAL SECTIONS OF ELEVATION WALLS - REAR SOUTHERN SECTION OF WAREHOUSE B ROOF FRONT SOUTHERN SECTION OF WAREHOUSE B COVERWORLD - PLASTISOL RANGE COVERWORLD - PLASTISOL RANGE BRIARWOOD PRODUCTS - MEADOWSCAPE RANGE COVERWORLD - PLASTISOL RANGE JUNIPER GREEN (BS 12B29) VAN DYKE BROWN (BS 08B29) DARK GREY ANTHRACITE OLIVE GREEN (BS 12B27)

FIG4.16 FINAL MATERIAL PALETTE FROM THE UPPER OSPREY GLENCORE APPLICATION GREEN CLADDING OPTION 1 - COMPOSITION AND COLOURS Portland ERF Design and access statement

BUILDING ENVELOPE - FACADE DEVELOPMENT 4.6 ‘GREEN’ WALL - OPTION 2 LIVING WALL

4.6.1 This option utilises a living green wall to camouflage the bulk of the building from the long distance views in the AONB and WHS to the east.

4.6.2 Through the use of suitable hardy, marine environment plant species, as indicated on the facing page, the living wall would still create a striking landmark feature for observers close by such as visitors arriving in the port by sea.

4.6.3 The introduction of additional planting would have the potential for ecological improvements to this brownfield site.

4.6.4 Whilst it is technically possible to establish a living green wall in this harsh marine environment the selection of this option was discounted for the following reasons:

• any issues with establishing/maintaining plant growth in the first few years, or indeed over the life of the building, could 6868 result in a compromise to the desired camouflage effect;

• the colour of suitable marine hardy species would not be an ideal match for the lichen and scrub planting found on the East Weare escarpment;

• the initial capital expenditure, and on going maintenance cost, would not be financially viable for a building of this type.

HANGING SUBSTRATE AND IRRIGATION PIPES HOVE, BRIGHTON LIVING WALL DETAIL MARINE ENVIRONMENT LIVING WALL PRECEDENT EXAMPLE

FIG 4.17 GREEN CLADDING OPTION 2 - PRECEDENT IMAGES Portland ERF Design and access statement

EUONYMUS JAPONICUS CHOISYA TERNATA- MEXICAN ‘MICROPHYLLUS ARMERIA MARITIMA WHITE ORANGE BLOSSOM RHAMNUS ALATERNUS ALBOVARIEGATUS’ ELEAGNUS X EBBINGEI

6969

JUNIPERUS SCOPULORUM ‘SKYROCKET’ LONICERA PILEATA HEDERA HELIX- ENGLISH IVY GRISELINIA LITTORALIS PINUS MUGO ‘PUMILO’

VINCA MINOR PYRACANTHA TAMARIX TETRANDRA ESCALLONIA RUBRA BERBERIS THUNBERGII ‘ATROPURPUREA’

HARDY MARINE ENVIRONMENT LIVING WALL PLANT SPECIES (SPECIES SELECTION USED AT HOVE, BRIGHTON)

FIG 4.18 GREEN CLADDING OPTION 2 - MARINE HARDY PLANT SPECIES Portland ERF Design and access statement

BUILDING ENVELOPE - FACADE DEVELOPMENT 4.7 ‘GREEN’ WALL - OPTION 3 PPC ANGLED BLADES

Dark Green 4.7.1 This option creates a camouflage effect by utilising an array of folded, polyester powder coated metal blades that are mounted onto vertical rails fixed to the building’s external envelope. R: 053 4.7.2 Using an image of East Weare a selection of colours typical of G: 063 the cliff face behind have been selected. A base tone is created by the B: 027 ‘Dark Green’ cladding that encloses the building. The blades, which are bent to a variety of angles, are then coloured ‘Light Brown’ on the left LIGHT BROWN hand face and ‘Dark Brown’ on the right hand face to create mottled colour similar to the vegetation found lining the lower escarpment.

4.7.3 Whilst fixed, the variation of blade angle and face colour R: 157 creates subtle plays of light that produce a dynamic facade that G: 134 B: 072 changes colour with the location of the observer, as can been seen from the selection of views to the far right.

7070 Dark BROWN 4.7.4 Whilst this creates a dynamic camouflage the arrangement of bent louvres would result in turbulent air coming off the building which would disrupt the dispersion of the exhaust air from the stack. This R: 110 option was therefore discounted. G: 094 B: 052 (Google Earth)

VIEW ACROSS WEYMOUTH BAY SHOWING THE TONES AND COLOURS VISIBLE FROM THE AONB

STATIC DYNAMIC FACADE CREATED BY BENT BLADES DETAIL SHOWING MOUNTING RAILS AND BENT BLADES 1. INDICATIVE VIEW FROM BALACLAVA BAY ESKENAZI HOSPITAL PARKING STRUCTURE 30 X 15M SAMPLE PANEL WITH SITE COLOURS

FIG 4.19 FIG 4.20 PRECEDENT IMAGE GREEN CLADDING OPTION 3 - BLADE COMPOSITION AND COLOUR Portland ERF Design and access statement

COLOURED CLADDING PANEL SUBSTRATE

7171

-60 deg -45 deg -30 deg -15 deg 0 deg 15 deg 30 deg 45 deg 60 deg

STATIC DYNAMIC FACADE: COMPONENT PARTS

2. INDICATIVE VIEW FROM SOUTHERN SHIPPING CHANNEL 3. INDICATIVE VIEW FROM DEEP WATER BERTH 4. INDICATIVE VIEW FROM PORTLAND HARBOUR Portland ERF Design and access statement

BUILDING ENVELOPE - FACADE DEVELOPMENT 4.8 ‘GREEN’ WALL - OPTION 4 PRINTED FACADE

4.8.1 With advances in technology it is now possible to wrap buildings with a printed image allowing the building to seamlessly blend with its surroundings.

4.8.2 In a technique sometimes known as ‘trompel’oeil’. a high resolution image of the East Weare escarpment, or camouflage pattern with similar tones, could be incorporated into the façade design of the building. HIGH RESOLUTION IMAGE OF EAST WEARE: TAKEN FROM PORTLAND HARBOUR FOR USE AS BUILDING WRAP 4.8.3 This could be achieved through the use of a printed heavy-duty, PVC mesh (320gsm) stretched tightly over a frame or a vinyl wrap applied directly to the external cladding panel. Both options utilise solvent UV inks which ensures photo-realistic quality and long-lasting outdoor colour performance. 7272 4.8.4 As demonstrated on the following pages this option provided the best camouflage from long distance views in the AONB and so is the preferred option for the final proposals.

STATIC DYNAMIC FACADE CREATED BY BENT BLADES RICE UNIVERSITY – CAMBRIDGE OFFICE BUILDING GARAGE - PRINT OF THE ‘LOCAL OAK GROVE’ ESKENAZI HOSPITAL PARKING STRUCTURE

FIG 4.21 OPTION 4 PRINTED FACADE - PRECEDENT IMAGES Portland ERF Design and access statement

7373 Portland ERF Design and access statement BUILDING ENVELOPE - FACADE DEVELOPMENT ‘GREEN’ WALL - 4.9 OPTIONS IN CONTEXT

OPTION 1 - DARK GREEN CLADDING OPTION 2 - LIVING GREEN WALL

4.9.1 Whilst previously accepted on the Upper Osprey application the use of a single colour on the 4.9.3 The living green wall provides the variety of colour missing in the first option but due to the flat elevational planes stands out against the variation in colour of the vegetation behind. limitation of the green wall technology, growing substrate and available selection of plant species hardy enough to sustain the harsh marine environment it would be impossible to achieve a good 4.9.2 This reduces the effectiveness of the camouflage and results in the full extent of the building’s colour match for the vegetation that currently grows on the cliff face of East Weare. mass being visible from the harbour, bay and AONB further to the east. 4.9.4 The harsh coastal environment may require substantial time to successfully establish and may have ongoing issues in maintaining healthy plants, potentially reducing the effectiveness of the camouflage effect over the lifespan of the building.

7474

PROPOSED BUILDING EXTENT PROPOSED BUILDING EXTENT

CAMOUFLAGE RATING (1-10): 5 (produced using Google Earth) CAMOUFLAGE RATING (1-10): 7 (produced using Google Earth)

FIG 4.22 GREEN WALL OPTIONS VIEWED ACROSS PORTLAND HARBOUR Portland ERF Design and access statement

OPTION 3 - PPC ANGLED BLADES OPTION 4 - PRINTED PVC MESH

4.9.5 As demonstrated below the coloured blades create both the desired variation in colour and 4.9.7 Derived from photographs of the vegetation on the East Weare cliff face, the printed PVC the longevity desired from the camouflaging effect. mesh would provide an elevational treatment almost indeterminable from the cliff face itself. Whilst just a snap shot of the vegetation at one point of the year the lichen and plant species of the cliff do not 4.9.6 However, the vertical railings and blades would create turbulent air around the facade of the change colour much throughout the year and so this would be an effective year round solution. building that could potentially disturb the dispersion of the exhaust gases from the plant’s stack. For this reason this option has been discounted. 4.9.8 The PVC mesh is provided with a warranty similar to that of the metal cladding and so both would be replaced at the same time as part of the building’s standard operational maintenance regime.

7575

PROPOSED BUILDING EXTENT PROPOSED BUILDING EXTENT

CAMOUFLAGE RATING (1-10): 8 (produced using Google Earth) CAMOUFLAGE RATING (1-10): 10 (produced using Google Earth) Portland ERF Design and access statement

BUILDING ENVELOPE - FACADE DEVELOPMENT 4.10 ROOF

ROOF TREATMENT 4.10.5 From these viewpoints the roof would be FIBRE CEMENT ROOFING PHOTOVOLTAIC PANELS read against the sky or sea respectively, negating the 4.10.1 The location, scale and orientation of the recessed appearance of the sedum. 4.10.9 Given the limited positions from which the 4.10.12 The main roof of the RDF store is south roof provide the opportunity for a number of different roof is visible a possible alternative roof treatment facing making this orientation ideal for the installation roof treatments. The main options that have been 4.10.6 A green roof could have some ecological might be the use of a dark coloured, sinusoidal, fibre of photovoltaic panels. considered are outlined below. benefits by improving biodiversity of the site and cement roof sheet, similar to that specified on the potentially helping with the cleansing and filtration of Upper Osprey Glencore application further up Incline 4.10.13 If specified with a non-reflective coating the GREEN ROOF surface water prior to discharging into the sea. Road. installation of the dark photovoltaic panels could produce up to 764MWh of additional electricity without 4.10.2 A lightweight ‘extensive’ green roof, one 4.10.7 The provision of green roofs could encourage 4.10.10 The dark colour would assist with making creating any glint or glare that might compromise the that predominately consists of sedum, could possibly bird nesting in the port which could create operational the building recessive and the surface of the fibre desired recessive appearance of the building. contribute to the recessive appearance of the building. issues for the proposed building use and those of the cement panels is non-reflective ensuring the building wider port where helicopters are occasionally required would not create any glint or glare as the sun moves 4.10.14 Whilst in the winter months some 4.10.3 A careful selection of sedum species could to land in close proximity to the building. throughout the day. overshaddowing of the roof might be created by the potentially provide a carpet of colour that would blend 140m cliff face of East Weare the additional electricity with the shrub vegetation behind the building. 4.10.8 Given the limited visual benefits of the 4.10.11 Over the life of the building the panel would would contribute to the sustainability of the ERF and green roof and the potential operational issues it is weather down, collecting airborne debris in the slightly so is explored in more detail on the following pages. 7676 4.10.4 Due to the orientation the roof is unlikely to considered the cost of a green roof would be better porous surface of the sheet. Over time this would be seen from any areas of the AONB to the east with spent on optimising the effectiveness of the building’s allow lichen and other moss species to grow in the the roof only visible from the sea and very limited view facade. grooves of the panel, as visible on the old Incline points on the south eastern cliff face of Portland. engine house at the top of Incline Road.

SEDUM GREEN ROOF FIBRE CEMENT ROOF - ANTHRACITE OLD INCLINE ENGINE HOUSE, INCLINE ROAD OLD INCLINE ENGINE HOUSE - SINUSOIDAL ROOF SHEETING WITH MOSS AND LICHEN FIG 4.23 CONSIDERED ROOFING MATERIALS Portland ERF Design and access statement

7777 Drawing not to scale, For information purposes only. Not for construction. Notes: Drawing not to scale, For information purposes only. Not for construction.

Drawing not to scale, Notes: For information purposes only.

LPG Store Not for construction. Issue Log: 14 13 Issue: Revision Details: Date:Notes: 12

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11 16 01 Initial Issue 20/07/2020

10

17 LPG Store parking 9

landscaped 18 Issue Log: Lifting 14 entrance Barrier main 8 entrance 19 13

toilets changing 1 20 LPG unloading Issue: Revision Details: Date: toilets 12 changing foyer covered and pipe 15 showers entrance maintenance road Dis 21 showers Bins 2 11 lockers 16 01 alarm panels Initial Issue 20/07/2020 F landscaped changing lockers M Portland ERF 22 Reception 29 entrance 3 10 Stack draft lobby 17 +7.30 parking 4 Design and 9 reception parking landscaped 18 Store Cycle Lift +7.30 Lifting LPG Store Store 5 entrance access statement Barrier main 8 entrance 19 Issue Log: 11kV 14 Switchroom weighbridge 6 Generator toilets changing 1 20 LPG unloading toilets fire escape/ 13 store 7 changing foyer covered and pipe showers access to main entrance maintenance road Dis 21 Transformer showers 2 Issue: Date: building Bins Revision Details: store Open 12 Compound lockers alarm panels Plan Office 15 F landscaped changing Drawing not to scale, +5.70 lockers M Reception 22 29 store entrance 3 Stack 11 draft Water Tank lobby 16 01 Initial Issue 20/07/2020 +7.30 4

informal 10 meeting For information purposes only. reception parking Turbine Hall 17 Store Cycle Lift +7.30 Store 33kV BUILDING ENVELOPE - FACADE parkingDEVELOPMENT 5 Switchroom 9 store 11kV landscaped 18 +5.70 Lifting 6 entrance weighbridge Not for construction. Barrier Switchroom main Generator 8 entrance 19 fire escape/ 7 informal store meeting meeting access to main SSE 33kV +6.90 room +7.30 Transformer toilets changing 1 +5.70 Sprinkler Tank 20 LPG unloading building Switchroom Compound toilets store Open changing foyer covered and pipe Plan Office +5.70 showers entrance

Exhaust Air Dis 21 maintenance road showers store Bins 2 Notes: Filtration informal lockers Water Tank +5.70 alarm panels SSE Battery / landscaped meeting F Urea Tank changing lockers M Reception 22 Control Room 29 entrance 3 informal Stack kitchen fire draft meeting PHOTOVOLTAICescape lobby ROOFTurbine Hall 33kV +7.30 4.11 4 Switchroom reception parking store HV Room Store Cycle Lift +7.30 +5.70 Store xx.xxsqm 23 Silo 1 5 Drawing not to scale, 11kV P-Sprinkler informal weighbridge 6 meeting Switchroom meeting SSE 33kV +6.90 24 +7.30 Generator +5.70 Sprinkler Tank room Trans 2 Switchroom fire escape/ Silo 2 xx.xxsqm store 7 Admin For information purposes only. access to main Transformer LV Room Exhaust Air Filter 25 building xx.xxsqm store Open Compound Filtration informal +5.70 Plan Office +5.70 Trans 1 SSE Battery / Urea Tank meeting xx.xxsqm sp Control Room store fire Not for construction. 26 kitchen Typeescape 2 - Tilt5 - Az-47 Silo 3 parking Water Tank Lamber Room Battery informal meeting 25sqm Room Turbine Hall 27 HV Room 33kV xx.xxsqm Silo 1 xx.xxsqm 7 x23 22 = 154p Switchroom WC +8.70 store P-Sprinkler

+5.70 28 LPG Store Notes: dis. & +7.20 +11.70 24 Trans 2 Store xx.xxsqm Silo 2 informal Issue Log: xx.xxsqm meeting 14 Admin Silo 4 meeting SSE 33kV +6.90 +7.20 room +7.30 LV Room Filter 25 +5.70 & Sprinkler Tank xx.xxsqm Switchroom +10.20 Trans 1 13 Exhaust Air xx.xxsqm Technical sp Boiler House 26 Issue: Date: Silo 3 Type 2 - Tilt5 - Az-47 Revision Details: Filtration informal parking +5.70 Room 12 SSE Battery / meeting Urea Tank 127.2sqm Lamber 15 Control Room Room Battery kitchen fire escape 11 25sqm Room 27 16 01 Initial Issue xx.xxsqm 7 x 22 = 154p 20/07/2020

WC 10 HV Room +8.70 17 & 28 Silo 1 xx.xxsqm 23 dis. +7.20 +11.70 parking 9

P-Sprinkler landscaped Store 18 Lifting Silo 4 xx.xxsqm PV ROOF 24 +7.20 entrance main 8 Barrier Trans 2 & +10.20 19 Silo 2 xx.xxsqm entrance Admin LV Room

25 Technical Filter xx.xxsqm Boiler House toilets changing 1 20 LPG unloading Loading Bay B toilets Room Trans 1 changing 127.2sqmfoyer covered and pipe xx.xxsqm showers entrance LPG Store sp maintenance road Dis 21

26 showers Bins 2 Type 2 - Tilt5 - Az-47 Silo 3 parking lockers Service Yard alarm panels landscaped Lamber F changing lockers M Type 1 - Tilt7 - Az-21 Issue Log: 14 Battery Reception 22 29 Room 3 entrance draft SOLAR PANEL LAYOUT 25sqm Stack Room 27 4.11.1 With East Weare escarpment and The Verne sitting at 146m AOD lobby xx.xxsqm +7.30 13 7 x 22 = 154p WC 4 Drawing not to scale, +8.70 Cycle reception parking 0p 28 Store Lift +7.30 Issue: Date: dis. & Revision Details: Store 12 void below IBAA 5 +7.20 +11.70 boiler hopper 15 11kV Store 11 in close proximity to the proposedxx.xxsqm building there is potential that any PV 6 Silo 4 For information purposes only. RDF Pit +7.20 weighbridge Switchroom 16 01 Initial Issue 20/07/2020 & Generator Loading Bay B +10.20 Type 3 - Tilt7 - Az-47 fire escape/ +7.20 store 7 10 Technical access to main 17 IBA Boiler House Transformer building parking Not for construction. store Open Compound Room 9 Collection roof would be overshadowed127.2sqm in the afternoon. Service Yard Plan Office +5.70 landscaped 18 Type 1 - Tilt7 - Az-21 Lifting 4 x 20 = 80p RDF Pit store entrance Barrier Water Tank main 8 entrance Maintenance19 Access Route +7.20 informal meeting toilets changing 1 0p Turbine Hall 20 LPG unloading void below toilets IBAA Notes: 33kV changing foyer covered and pipe boiler hopper showers entrance Switchroom maintenance road store Dis 21 showers +5.70 Bins 2 RDF Pit lockers F alarm panels landscaped changing lockers M +7.20 Reception 22 Type 3 - Tilt7 - Az-47 29 entrance 3 To understand the impact of the overshadowingStack and assess the informal+7.20 draft 4.11.2 meeting Loose RDF +6.90 +7.30 meeting lobby SSE 33kV +5.70 IBA room +7.30 Loading Bay B Unloading Sprinkler Tank 4 Switchroom Collection reception parking +7.00 Store Cycle Lift +7.30 4 x 20 = 80p Exhaust Air RDF Pit Store 5 Service Yard +5.70 Filtration informal +7.20resultantSSE Battery / efficiencies and viability of a PV roof a detailed solar analysis has meeting Type 1 - Tilt7 - Az-21 Maintenance Access Route Urea Tank 11kV Control Room weighbridge +7.20 6 Switchroom kitchen fire +6.90 Generator escape fire escape/ 7 access to main store Transformer 0p HV Room Loading Bay A building store Open void below xx.xxsqm IBAA 23 been undertaken,+7.00 as describedSilo 1 below.Compound +5.70 Plan Office boiler hopper +7.20 P-Sprinkler store RDF Pit Loose RDF Water Tank 24 Type 1 - Tilt7 - Az-21 Trans 2 Type 3 - Tilt7Unloading - Az-47 xx.xxsqm informal Silo 2 +7.20 meeting Admin LV Room Turbine Hall +7.00 LPG Store IBA 33kV Filter xx.xxsqm 25 Collection Switchroom +7.20 store 10 x 52 = 520p +5.70 Trans 1 4 x 20 = 80p Issue Log: xx.xxsqm 14 RDF Pit sp +7.00 26 +6.90 Type 2 - Tilt5 - Az-47 Silo 3 parking Lamber Maintenance Access Route METHODOLOGY 13 +7.20 informal Battery meeting +6.90 Room Boiler Incline meeting SSE 33kV room +7.30 25sqm 27 Loading Bay A +5.70 Room Sprinkler Tank Issue: Revision Details: Date: Switchroom xx.xxsqm +7.00 12 7 x 22 = 154p WC 15 Exhaust Air +8.70

28 Filtration dis. & 11 +5.70 Type 4 - Tilt45 - Az-47 informal +11.70 meeting +7.00 SSE Battery / +7.20 16 Type 1 - Tilt7 - Az-21 01 Initial Issue 20/07/2020 +7.20 Urea Tank Control Room Store fire 10 kitchen Silo 4 Loose RDF xx.xxsqm escape +7.20 17 RDF Bale & Unloading +10.20 parking 8 x 18 = 144p 9 4.11.3 The roof mountedUnloading PV system has been designed using a 10 x 52 = 520p HV Room +7.00 landscaped 18

Lifting Technical xx.xxsqm 23 Silo 1 Boiler House entrance +7.00 Barrier Room main 8 +7.20 127.2sqm entrance 19 P-Sprinkler

+6.90 24 Boiler Incline toilets changing 1 Trans 2 combination of roof plans and the 3D model of the structure in order to 20 LPG unloading Silo 2 toilets xx.xxsqm changing foyer covered and pipe Admin showers entrance LV Room Filter 25 Loading Bay A +7.90 maintenance road Dis 21 showers xx.xxsqm +7.00 Bins 2 Type 4 - Tilt45 - Az-47 lockers F alarm panels +7.00 Trans 1 landscaped changing lockers M xx.xxsqm sp Reception 22 29 3 entrance 26 accurately size up the+7.20 number of panels that could be mountedSilo 3 onto the draft Type 2 - Tilt5 - Az-47 Stack parking lobby Type 1 - Tilt7 - Az-21 +7.30 Lamber RDF Bale 4 Battery 8 x 18 = 144p Room Unloading

25sqm 27 reception parking Room Store Cycle Lift +7.30 Store xx.xxsqm 5 Loading Bay7 xB 22 = 154p available roof space,De-Baler whilst leaving room for the parapet and an access WC 10 x 52 = 520p Loading Bay C +8.70 11kV dis. & 28 6 +7.00 weighbridge +11.70 Skyfall Energy Ltd Switchroom +7.20 Generator Service Yard fire escape/ Store Type 1 - Tilt7 - Az-21 Silo 4 store xx.xxsqm7 Boiler Incline+7.20 access to main Type+7.90 1 - Tilt7 - Az-21& Transformer building +10.20 walkway around the system to facilitate operations and maintenance, both store Open Suite B, The Core Compound Plan Office +5.70 Technical 0p Boiler House store +7.20 void below TypeRoom 4 - Tilt45 - Az-47 IBAA Water Tank +7.00 222p127.2sqm boiler hopper Gore Cross Business Park informal 7878 of the system itself and the underlying roof structure. This process has meeting Turbine Hall RDF Pit 33kV RDF Bale 8 x 18 = 144p Type 3 - Tilt7 - Az-47 Switchroom Unloading +7.20 De-Baler Bridport store Loading Bay C +5.70 IBA Skyfall Energy Ltd demonstrated that the system could be installed with upCollection to 1,559 Longi informal 4 x 20 = 80p RDF Pit meeting meeting DT6 3FH +6.90 +7.30 Type 1 - Tilt7 - Az-21 SSE 33kV +5.70 Sprinkler Tank room Suite B, The Core Switchroom Maintenance Access Route +7.20 +7.90 Exhaust Air Loading Bay B Filtration Solar 450w+5.70 solar panels, generating a total export capacity of 580kW-AC. informal Phone: 01308222p 808809 SSE Battery / meeting Gore Cross Business Park Urea Tank Control Room +7.20 kitchen fire Service Yard escape Type 1 - Tilt7 - Az-21 +7.20 Bridport HV Room Loose RDF Email: [email protected] Silo 1 xx.xxsqm Unloading 23 De-Baler Loading Bay C 0p P-Sprinkler +7.00 void below IBAA Skyfall Energy Ltd Dorset DT6 3FH boiler hopper 24 www.skyfall-energy.com Trans 2 +7.20 4.11.4 Once the system had been spatially designed the 3D model xx.xxsqm Silo 2 RDF Pit Admin LV Room +6.90 Type 1 - Tilt7 - Az-21 Filter 25 xx.xxsqm Type 3 - Tilt7 - Az-47 Suite B, The Core +7.20 ©Skyfall Energy Ltd. Phone: 01308 808809 Trans 1 xx.xxsqm sp Loading Bay A IBA 26 Type 2 - Tilt5 - Az-47 was imported into an industry Silostandard 3 piece of solar modelling software Collection +7.00 Maintenanceparking Access Route 222p Lamber 4 x 20 = 80p Gore Cross Business Park RDF Bale Store Room Battery RDF Pit 25sqm Room 27 Type 1 - Tilt7 - Az-21 Email: [email protected] xx.xxsqm Maintenance Access Route +7.20 7 x 22 = 154p WC Bridport +8.70

(PVSyst). The panel layout was integrated with the 3D model and the paired 28 & Project Name: dis. +7.20 +11.70 10 x 52 = 520p www.skyfall-energy.com Store xx.xxsqm Dorset DT6 3FH Silo 4 +7.20 +7.00 & +7.20 with inverters, a combination of SMA Sunny Tripower 60s and 20000TLs. +10.20 ©Skyfall Energy Ltd. Loose RDF Boiler Incline Technical Boiler House RDFUnloading Bale Store Room Maintenance Access RoutePhone: 01308 808809 127.2sqm +7.00 RDF Bale Store Type 4 - Tilt45 - Az-47 Powerfuel Portland ERF The combined 3D model and electrical model was then analysed in order +7.00 +7.20 Type 1 - Tilt7 - Az-21 +6.90 Email: [email protected] Project Name: RDF Bale 8 x 18 = 144p Unloading 9 x 49 = 441p Loading Bay A to accurately model the effects of the building and terrain shading along +7.00 www.skyfall-energy.com Document Name: Type 1 - Tilt7 - Az-21 with the anticipated losses throughout the system, taking into account the RDF BaleLoading©Skyfall Store Bay Energy B Ltd. +7.90 Maintenance Access Route Powerfuel Portland ERF Service Yard Type 1Type - Tilt7 1 -- Tilt7Az-21 - Az-21 10 x 52 = 520p RDF Bale Store Lifting +7.20 +7.00 predicated amount of sunlight that will be available. Barrier RoofBoiler Mounted Incline Solar9 x 49 = 441p0p +7.05 Project Name: +6.70 void below IBAA boiler hopper De-Baler TypeLoading 4 - Tilt45 Bay - Az-47 C Document Name: RDF Pit Skyfall Energy Ltd +7.00 Type 3 - Tilt7 - Az-47 +7.00 +7.20 Type 1 - Tilt7 - Az-21 IBA RDF Bale RDF Bale Store 8 x 18 = 144p Suite B, The Core Unloading Sizing Plan 4.11.5 This analysis has predicted a yield for the site of Collection764MWh/year. +10.71 +6.79 4 x 20 = 80p RDF Pit Lifting Powerfuel Portland ERF +7.25 TypeBarrier 1 - Tilt7 - Az-21 222p Maintenance Access Route Gore Cross Business Park +7.20 Roof Mounted Solar +8.00 +7.05 +6.70 +9.00 +7.90 9 x 49 = 441p Bridport +10.81 +9.84 Document Reference #: +7.20 +7.20 +10.03 +7.00 Document Name: Dorset DT6 3FH +11.18 +6.83 Loose RDF Unloading Sizing Plan +8.75 +7.00 +10.71 +6.79 De-Baler +7.25 Phone: 01308 808809 +7.20 Loading Bay C +7.71 Lifting +6.90 1081-02-35 Skyfall Energy Ltd Barrier +8.00 +9.00 TypeRoof 1 - Tilt7 -Mounted Az-21Loading Bay Solar A Email: [email protected] +7.05 +6.70 +10.81 +9.84 Suite B, The Core +7.00 Scale: NTS@A3 Issue: 01 Document Reference #: +10.03 +11.18 +6.83 222p Type 1 - Tilt7 - Az-21 www.skyfall-energy.com Gore Cross Business Park +7.00 +8.75 Date: Sizing10 xPlan 52 = 520p ©Skyfall Energy Ltd. Bridport +10.71 +6.79 +7.71 Produced: Checked: +7.25 +7.00 Maintenance Access Route 1081-02-35 RDF Bale Store Boiler Incline Dorset DT6 3FH +8.00 RC ## 20/07/2020 +9.00 Scale: NTS@A3 Issue: 01 +10.81 +9.84 Type 4 - Tilt45 - Az-47 Project Name: Phone: 01308 808809 +7.00 Document Reference #: +10.03 +11.18 +6.83 RDF Bale 8 x 18 = 144p Unloading Produced: Checked:Email: [email protected]: +8.75 RDF Bale Store +7.71 Type 1 - Tilt7 - Az-211081-02-35 PowerfuelRC Portland## ERFwww.skyfall-energy.com20/07/2020 +7.90 9 x 49Scale: = 441p NTS@A3 Issue: 01 ©Skyfall Energy Ltd. +7.20 Maintenance Access Route RDF Bale Store Document Name: De-Baler Loading Bay C Produced: Checked: Date: Skyfall EnergyProject Ltd Name:

Lifting Type 1 - Tilt7 - Az-21 RC ## 20/07/2020 Barrier Suite B, The Core RDF Bale Store Roof Mounted Solar +7.05 +6.70 222p Gore Cross Business Park Type 1 - Tilt7 - Az-21 Powerfuel Portland ERF +7.00 Bridport FIG 4.24 9 x 49 = 441p Sizing Plan +10.71 +6.79 Dorset DT6 3FH PV ROOF - PVSyst SIMULATION RESULTS +7.25 Document Name: +8.00 +9.00 Phone: 01308 808809 +10.81 +9.84 Document Reference #: +10.03 Lifting Email: [email protected] +11.18 +6.83 Barrier Roof Mounted Solar +7.05 +8.75 +6.70 www.skyfall-energy.com +7.71 1081-02-35 +7.00 ©Skyfall Energy Ltd. Maintenance Access Route Issue:Sizing 01 Plan +10.71 +6.79 Scale: NTS@A3 RDF Bale Store +7.25

+8.00 Project Name: +9.00 Produced: Checked: Date: +10.81 +9.84 Document Reference #: +10.03 +11.18 +6.83 RDF Bale Store RC ## 20/07/2020 +8.75 Type 1 - Tilt7 - Az-21 Powerfuel Portland ERF +7.71 1081-02-35 9 x 49 = 441p Document Name:Scale: NTS@A3 Issue: 01 Produced: Checked: Date: Lifting Barrier Roof MountedRC Solar ## +7.05 +6.70 20/07/2020

+7.00 Sizing Plan +10.71 +6.79 +7.25

+8.00 +9.00 +10.81 +9.84 Document Reference #: +10.03 +11.18 +6.83

+8.75 +7.71 1081-02-35 Scale: NTS@A3 Issue: 01 Produced: Checked: Date: RC ## 20/07/2020 Portland ERF Design and access statement

ISO SHADING DIAGRAM LOSS DIAGRAM OVER THE WHOLE YEAR

7979

NORMALIZED ENERGY PRODUCTIONS Portland ERF Design and access statement

BUILDING ENVELOPE - FACADE DEVELOPMENT 4.12 STACK COLOURING

4.12.1 With the 80m high stack visible against both sky and the Isle of Portland the following study was undertaken to determine whether changes in colour could help reduce the visual prominance of the stack.

4.12.2 As the views from the AONB were considered the most sensitive, where it protrudes above the height B of the Boiler Hall the stack has been coloured green. A However, as demonstrated by the hatched areas on the enlarged plan extract below, this same section of the stack would also need to blend in with the sky from views in Portland Harbour and Balaclava Bay.

4.12.3 Due to the contrast in colour the green stack would stand out more against a clear blue sky than a neutral battleship grey colour from these views.

8080 4.12.4 On an overcast, grey day there is not much difference in the visibility of the coloured or battleship grey stack from the considered angles but the grey blends slightly better into the majority of views.

4.12.5 For this reason it is considered that a neutral battleship grey stack is the least visually prominent solution.

B A C

C

Area where stack needs to be different colours VIEWPOINT LOCATION PLAN to suit different viewpoints FIG 4.25 STACK COLOURING CONSIDERED VIEWPOINTS AND BACKDROP

FIG ?.? CAPTION TITLE?????? Portland ERF Design and access statement

SUNNY DAY

OVERCAST DAY MULTICOLOURED STACK STACK MULTICOLOURED

8181

SUNNY DAY

OVERCAST DAY BATTLESHIP GREY STACK GREY STACK BATTLESHIP (produced using Google Earth) (produced

VIEW POINT A VIEW POINT B VIEW POINT C FIG 4.26 STACK COLOURING VISUALISATIONS - CONSIDERED VIEWPOINTS FOR VARIED LIGHTING CONDITIONS