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Brechfa Forest ConnectionDevelopment Consent Order Application - Reference EN020016
May 2015Regulation reference: The Infrastructure Planning(Applications: Prescribed Forms and Procedure)
Regulations 2009 Regulation 5(2)(o)
Des
ign
Dra
win
gs a
nd P
rofil
es 2
.7
132kV Underground Cable Work No. 2 Design Drawings
HDD DRILLING RIG
PROPOSED DIRECTIONAL DRILL ROUTE
PROPOSED OPEN CUT TRENCH ROUTE
ROAD LEVEL
RIVER/STREAM BED LEVEL
GROUND LEVEL
1.All dimensions are in metre unless otherwise stated.
2.Dimensional information should not be obtained from this drawing (do not scale).
3.Dimensions are indicative only and will vary according to installation and site conditions.
4.Ditch crossing method to be defined depending on specific characteristics and installation
conditions. Trench arrangements and dimensions to be confirmed during detail design stage.
5.Ditch crossing construction operation will not impinge water flow.
6.Proposed general arrangement based on WPD requirements. Arrangement and
dimensions to be confirmed during detail design stages.
7.At certain locations ducts may be filled with bentonite.
8.Depth to be agreed with the relevant stakeholders.
Grass over firm brown silty slightly gravelly CLAY.
Gravel is subangular, fine of mudstone. Frequent roots and rootlets.
Firm, very stiff in places, brown, grey silty gravelly CLAY.
Gravel is angular, fine to coarse of mudstone.
Stiff, dark brown, silty, slightly sandy, slightly gravelly CLAY.
Gravel is angular to subrounded, fine to coarse of mudstone, shale, sandstone. Sand is fine.
Medium dense, dark brown, clayey, sandy, angular to subrounded,
fine to coarse GRAVEL of mudstone,shale.
Sand is fine.from 6.00m to 7.00m: very dense, subangular to subrounded,
fine to medium gravel of siltstone.from 7.00m to 8.90m: rare cobbles of limestone.
Dark brown, silty, fine SAND.
Medium dense, dense to very dense in places, dark brown, sandy, clayey, angular to subangular,
fine to coarse GRAVEL of mudstone, shale. Occasional cobbles of mudstone. Sand is fine.
from 13.50m to 15.00m: cobbles of mudstone.
Grass over, soft, brown clayey, sandy SILT.
Sand is fine. Frequent rootlets.
Soft, brown, clayey, sandy, slightly gravelly SILT.
Gravel is subrounded to rounded, fine to coarse of mudstone.
Sand is fin.
Loose, brown, clayey, silty, sandy, angular to subangular,
fine to coarse GRAVEL of mudstone. Sand is fine.
Very loose, black, silty, gravelly, fine to medium SAND.
Gravel is angular to subrounded, fine to coarse of mudstone.
Very soft, brown, silty CLAY.
Very loose, black, silty, gravelly, fine SAND.
Gravel is angular to subrounded, fine to coarse of mudstone.
Very loose, Brown, clayey, sandy, angular to subangular,
fine to coarse GRAVEL of mudstone.
Sand is fine. Driller reports rising sand and gravel to 5.0m.
Very loose, Grey, silty, clayey subrounded to rounded,
fine to coarse GRAVEL of mudstone.
Very Soft, dark grey, clayey, slightly gravelly SILT.
Gravel is subrounded to rounded, fine to medium of mudstone.
Soft, dark grey, clayey SILT.
Soft, dark grey, clayey, sandy, gravelly SILT.
Gravel is subrounded to rounded,
fine to medium mudstone.Sand is fine.
No recovery, assumed weathered SILTSTONE.
Very soft, dark grey, clayey, sandy, gravelly SILT.
Gravel is angular,
fine to coarse siltstone. Sand is fine.
Weak, grey, moderately weathered SILTSTONE.
Discontinuities are horizontal (7),very closely spaced (20/50/70), planar, rough,
open and infilled with angular to subangular, fine to medium gravel of siltstone.
Weak, grey, completely weathered SILTSTONE.
0.00-0.40
0.40-3.00
3.00-4.00
4.00-8.90
8.90-9.50
9.50-15.0
0.00-2.00
2.00-2.80
2.80-3.70
3.70-4.65
5.00-5.80
5.80-6.00
6.00-7.60
7.60-9.00
7.60-9.00
9.00-10.4
10.4-11.0
11.0-12.5
12.5-13.0
13.0-14.5
14.5-15.0
Depth
(BH2)
CHAIN LINK FENCE
CHAIN LINK FENCE
CHAIN LINK FENCE
CHAIN LINK FENCE
RIVER TOWY (AFON TYWI)
132kV XLPE cable in duct
15
0m
m F
WD
WT
R(G
PR
)
15
0m
m S
WD
4" u
PV
C
RP
LP
312m
Depth
(BH1)
10
.3
3
11
.7
4
11
.5
5
7.9
3
0.00-1.20
1.20-2.00
2.00-4.00
4.00-5.00
Grass over, Loose Brown silty gravelly fine to coarse SAND with
fine subangular gravel
Loose to medium, Brownish Grey, coarse SAND with angular, fine to
medium gravel of mudstone.
Medium, Grey, slightly silty SAND AND GRAVEL with fine to
coarse, subangular gravel of mudstone and fine to coarse sand.
Medium, Brown SAND AND GRAVEL with fine to coarse,
subangular to subround gravel and fine to coarse sand and
rare subround cobbles of mudstone.
Depth
(BH4)
CHAIN LINK FENCE
CHAIN LINK FENCE
ABERGWILI ROAD
6xB
T(2
on
2o
n2
)
6" u
PV
C W
TR
Stre
et L
ig
ht
LPRP
57m
132kV XLPE cable in duct
3.9
8
Grass over, Dark Greyish Brown, fine to coarse, silty SAND with
rotten roots and some fine, angular gravel of mudstone.
Loose, Brown, silty, very clayey, fine to coarse SAND.
Very Soft, Brown, silty, very sandy CLAY.
Loose to Medium, Grey, clayey, coarse SAND with rare
subround,fine to medium gravel of mudstone, getting
slightly clayey from 3.5m.
Medium to Dense, Brown, silty, clayey, fine to coarse SAND and fine
to coarse, subangular to subround GRAVEL of mudstone.
Medium, Brownish, subround, coarse GRAVEL with
some fine to medium, subangular gravel of mudstone.
0.00-1.00
1.00-1.90
1.90-2.80
2.80-4.50
4.50-7.00
7.00-8.00
Medium, Greyish Brown, shaley SAND AND GRAVEL
with fine to coarse sand and fine to coarse, subangular
to subround gravel of mudstone.
8.00-10.0
Depth
(BH3)
CHAIN LINK FENCE
CHAIN LINK FENCE
CHAIN LINK FENCE
CLOSE BOARDED FENCE
DITCH
DITCH
132kV XLPE cable in duct
LP
RP
132m
2.26
1.69
APPLICATION No.
SCALE
ISSUE
TITLE:
ISSUE DATE COMMENTS CHK'D APP'DDRAWN
As Shown
ORIGINATOR DRAWINGNo.
COPYRIGHT NOT TO BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF WESTERN POWER DISTRIBUTION
KEY
Notes
PROJECTDRAWING No.
WESTERN POWER DISTRIBUTION (BRECHFA FOREST CONNECTION) ORDER
DESIGN DRAWINGS
(REGULATION 5(2)(o))
RB AFA
A
May 2015 FOR DCO SUBMISSION AJH
DD-A1-001 EN020016
15/WPD/104
SHEET 1 OF 7
132kV UNDERGROUND CABLE INSTALLATION
TYPICAL HORIZONTAL DIRECTIONAL DRILL
DETAIL
WESTERN POWER DISTRIBUTION
(BRECHFA FOREST CONNECTION)
ORDER
(REGULATION 5(2)(o))
A1
CAD
HDD 1 LONG SECTION
UNDER THE RIVER TOWY
1:500
20m15m10m5m05m
1:500 Metric
25m 30m 35m 40m 45m
HDD 2 LONG SECTION
UNDER TWO DITCHES
1:500
HDD 3 LONG SECTION
UNDER THE ABERGWILI ROAD
1:250
20m15m10m5m05m
1:500 Metric
25m 30m 35m 40m 45m
1:250 Metric
5m 0 5m 10m 15m 20m
HDD DRILLING RIG
PROPOSED DIRECTIONAL DRILL ROUTE
PROPOSED OPEN CUT TRENCH ROUTE
ROAD LEVEL
RIVER/STREAM BED LEVEL
GROUND LEVEL
1.All dimensions are in metre unless otherwise stated.
2.Dimensional information should not be obtained from this drawing (do not scale).
3.Dimensions are indicative only and will vary according to installation and site conditions.
4.Ditch crossing method to be defined depending on specific characteristics and installation
conditions. Trench arrangements and dimensions to be confirmed during detail design stage.
5.Ditch crossing construction operation will not impinge water flow.
6.Proposed general arrangement based on WPD requirements. Arrangement and
dimensions to be confirmed during detail design stages.
7.At certain locations ducts may be filled with bentonite.
8.Depth to be agreed with the relevant stakeholders.
DITCH
132kV XLPE cable in duct
LP
RP
80m
2.97
0.00-2.30
2.30-3.10
3.10-5.00
Grass over, loose to medium, Light Brownish Grey SAND AND
GRAVEL with fine to coarse sand and fine to coarse, subangular
to subround gravel of mudstone with rare subround cobbles.
Loose to medium Brownish Grey SAND AND GRAVEL with medium
to coarse sand and fine angular gravel with rare round coarse gravel
Medium to dense fine to coarse subangular to subround GRAVEL with
subround BOULDERS and some fine to coarse silty sand
Depth
(BH6)
POST & RAIL FENCE
POST & RAIL FENCE
132kV XLPE cable in duct
15
0m
m M
DP
E R
M(G
PR
)
50
0m
m D
IC
L(R
)
RP
LP
77m
A40
10.00
APPLICATION No.
SCALE
ISSUE
TITLE:
ISSUE DATE COMMENTS CHK'D APP'DDRAWN
As Shown
ORIGINATOR DRAWINGNo.
COPYRIGHT NOT TO BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF WESTERN POWER DISTRIBUTION
KEY
Notes
PROJECTDRAWING No.
WESTERN POWER DISTRIBUTION (BRECHFA FOREST CONNECTION) ORDER
DESIGN DRAWINGS
(REGULATION 5(2)(o))
RB AFA
A
May 2015 FOR DCO SUBMISSION AJH
DD-250A1-002 EN020016
15/WPD/104
SHEET 2 OF 7
132kV UNDERGROUND CABLE INSTALLATION
TYPICAL HORIZONTAL DIRECTIONAL DRILL
DETAIL
WESTERN POWER DISTRIBUTION
(BRECHFA FOREST CONNECTION)
ORDER
(REGULATION 5(2)(o))
A1
CAD
HDD 4 LONG SECTION
UNDER THE A40 ROAD
1:250
HDD 5 LONG SECTION
UNDER THE TRIBUTARY TO THE RIVER GWILI
1:250
1:250 Metric
5m 0 5m 10m 15m 20m
1:250 Metric
5m 0 5m 10m 15m 20m
PROPOSED WORKING AREA
PROPOSED TEMPORARY TRACK
1.All dimensions are in metre unless otherwise stated.
2.Dimensional information should not be obtained from this drawing (do not scale).
3.Dimensions are indicative only and will vary according to installation and site conditions.
4.Ditch crossing method to be defined depending on specific characteristics and installation
conditions. Trench arrangements and dimensions to be confirmed during detail design stage.
5.Ditch crossing construction operation will not impinge water flow.
6.Proposed general arrangement based on WPD requirements. Arrangement and
dimensions to be confirmed during detail design stages.
7.At certain locations ducts may be filled with bentonite.
8.Depth to be agreed with the relevant stakeholders.
JOINT BAY
LINK BOX
3x132kV XLPE cable
3xEARTH LEAD
SERVICE DUCT
CHAMBER
FIBRE OPTIC CABLE
WARNING TAPE
PROTECTIVE TILE
GROUND LEVEL
BACKFILL
JOINT BAY CASE
132kV XLPE cable
BASE SLAB
FIBRE OPTIC cable
90
0m
m m
in
.
Va
rie
s
JOINT BAY WOOD WALL
SUMPSUMP
BASE SLAB
CABLE CASE
WARNING TAPE
PROTECTIVE TILE
2438mm 600mm 2438mm
JOINT BAY CASE
GROUND LEVEL
132kV XLPE cable
12500mm 1800mm1800mm
900mm min.
AA
APPLICATION No.
SCALE
ISSUE
TITLE:
ISSUE DATE COMMENTS CHK'D APP'DDRAWN
As Shown
ORIGINATOR DRAWINGNo.
COPYRIGHT NOT TO BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF WESTERN POWER DISTRIBUTION
KEY
Notes
PROJECTDRAWING No.
WESTERN POWER DISTRIBUTION (BRECHFA FOREST CONNECTION) ORDER
DESIGN DRAWINGS
(REGULATION 5(2)(o))
RB AFA
A
May 2015 FOR DCO SUBMISSION AJH
JB-A1-003 EN020016
15/WPD/104
SHEET 3 OF 7
132kV UNDERGROUND CABLE INSTALLATION
TYPICAL GENERAL ARRANGEMENT OF
JOINT BAY WITH LINK BOX PIT
WESTERN POWER DISTRIBUTION
(BRECHFA FOREST CONNECTION)
ORDER
(REGULATION 5(2)(o))
A1
CAD
SECTION A - A
TYPICAL JOINT BAY CROSS SECTION
1:25
5m3m2m1m 0 1m
1:100 Metric
4m 6m 7m 8m 9m 10m 11m
1m500mm0500mm
1:25 Metric
2m1m01m
1:50 Metric
TYPICAL PLAN VIEW OF JOINT
BAY CONNECTIONS
1:100
TYPICAL SECTION VIEW OF JOINT BAY
1:50
PROPOSED WORKING AREA
PROPOSED TEMPORARY TRACK
1.All dimensions are in metre unless otherwise stated.
2.Dimensional information should not be obtained from this drawing (do not scale).
3.Dimensions are indicative only and will vary according to installation and site conditions.
4.Ditch crossing method to be defined depending on specific characteristics and installation
conditions. Trench arrangements and dimensions to be confirmed during detail design stage.
5.Ditch crossing construction operation will not impinge water flow.
6.Proposed general arrangement based on WPD requirements. Arrangement and
dimensions to be confirmed during detail design stages.
7.At certain locations ducts may be filled with bentonite.
8.Depth to be agreed with the relevant stakeholders.
JOINT BAY
TRACTOR
LINK BOX
3x132kV XLPE cable
3xEARTH LEAD
SERVICE DUCT
CHAMBER
FIBRE OPTIC CABLE
WARNING TAPE
PROTECTIVE TILE
GROUND LEVEL
BACKFILL
JOINT BAY CASE
132kV XLPE cable
BASE SLAB
FIBRE OPTIC cable
90
0m
m m
in
.
Va
rie
s
JOINT BAY WOOD WALL
SUMPSUMP
BASE SLAB
CABLE CASE
WARNING TAPE
PROTECTIVE TILE
2438mm 600mm 2438mm
JOINT BAY CASE
GROUND LEVEL
132kV XLPE cable
12500mm 1800mm1800mm
900mm min.
AA
APPLICATION No.
SCALE
ISSUE
TITLE:
ISSUE DATE COMMENTS CHK'D APP'DDRAWN
As Shown
ORIGINATOR DRAWINGNo.
COPYRIGHT NOT TO BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF WESTERN POWER DISTRIBUTION
KEY
Notes
PROJECTDRAWING No.
WESTERN POWER DISTRIBUTION (BRECHFA FOREST CONNECTION) ORDER
DESIGN DRAWINGS
(REGULATION 5(2)(o))
RB AFA
A
May 2015 FOR DCO SUBMISSION AJH
JB-A1-004 EN020016
15/WPD/104
SHEET 4 OF 7
132kV UNDERGROUND CABLE INSTALLATION
TYPICAL GENERAL ARRANGEMENT OF
CABLE PULLING SECTION
WESTERN POWER DISTRIBUTION
(BRECHFA FOREST CONNECTION)
ORDER
(REGULATION 5(2)(o))
A1
CAD
TYPICAL CABLE PULLING LAYOUT
1:100
TYPICAL SECTION VIEW OF JOINT BAY
1:50
SECTION A - A
TYPICAL JOINT BAY CROSS SECTION
1:30
5m3m2m1m 0 1m
1:100 Metric
4m 6m 7m 8m 9m 10m 11m
2m1m01m
1:50 Metric
1.Dimensions and layout arrangement shown is indicative only. Design will vary according to
the construction contractors requirements, the available area and the specific site constraints.
2.Portacabins will be single storey but may be raised to take account of potential flood risk at
certain locations. Details to be agreed with relevant stakeholders.
3.Soil bund will be designed with suitable gaps/ drainage pipes to allow water flow in flood
conditions. Details to be agreed with relevant stakeholders.
Drill Pipes
R/P
Cutting Settlement Pit
Pipe
Rollers
Construction
Equipment
Spares
Equipment
Temporary Fence
Temporary Fence
Te
mp
ora
ry F
en
ce
Ga
te
20.00
10.00
Proposed Cable
Pipe
Rollers
Drill Rig Area
Slurry
Mixing
Tank
Power
Generator
Control O
ffice
Cuttings
Separation
Equipment
Bentonite
Storage
Slurry
Pump
Cutting S
ettlem
ent P
it
L/P
30.00
Water
Tank
Temporary Fence
Temporary Fence
Tem
porary F
ence
Gate
20
.0
0
Water
Pump
APPLICATION No.
SCALE
ISSUE
TITLE:
ISSUE DATE COMMENTS CHK'D APP'DDRAWN
As Shown
ORIGINATOR DRAWINGNo.
COPYRIGHT NOT TO BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF WESTERN POWER DISTRIBUTION
Notes
PROJECTDRAWING No.
WESTERN POWER DISTRIBUTION (BRECHFA FOREST CONNECTION) ORDER
DESIGN DRAWINGS
(REGULATION 5(2)(o))
RB AFA
A
May 2015 FOR DCO SUBMISSION AJH
HDD-100A1-005 EN020016
15/WPD/104
SHEET 5 OF 7
GENERIC LAYOUT FOR HDD
COMPOUND
WESTERN POWER DISTRIBUTION
(BRECHFA FOREST CONNECTION)
ORDER
(REGULATION 5(2)(o))
A1
CAD
5m3m2m1m 0 1m
1:100 Metric
4m 6m 7m 8m 9m 10m 11m
5m3m2m1m 0 1m
1:100 Metric
4m 6m 7m 8m 9m 10m 11m
GENERIC LAYOUT OF THE
HDD COMPOUND PULL BACK SIDE
SCALE: 1:100
GENERIC LAYOUT OF THE HDD
COMPOUND RIG SIDE
SCALE: 1:100
KEY
1.Dimensions and layout arrangement shown is indicative only. Design will vary according to
the construction contractors requirements, the available area and the specific site constraints.
2.Portacabins will be single storey but may be raised to take account of potential flood risk at
certain locations. Details to be agreed with relevant stakeholders.
3.Soil bund will be designed with suitable gaps/ drainage pipes to allow water flow in flood
conditions. Details to be agreed with relevant stakeholders.
Gate
Fence
82m
130m
3m
5m
Fuel
Tank
Storage
20x Car Park Area
Security
Office
8xPortakabins
Material Storage Area
Material
Holding
Area
Compound Entrance
Office
Entrance
5m
3.00
5m
3.00
One Way
Laydown
Area
56m
9
9
m
16m
APPLICATION No.
SCALE
ISSUE
TITLE:
ISSUE DATE COMMENTS CHK'D APP'DDRAWN
As Shown
ORIGINATOR DRAWINGNo.
COPYRIGHT NOT TO BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF WESTERN POWER DISTRIBUTION
Notes
PROJECTDRAWING No.
WESTERN POWER DISTRIBUTION (BRECHFA FOREST CONNECTION) ORDER
DESIGN DRAWINGS
(REGULATION 5(2)(o))
RB AFA
A
May 2015 FOR DCO SUBMISSION AJH
UWC-250A1-006 EN020016
15/WPD/104
SHEET 6 OF 7
GENERIC LAYOUT FOR
UNDERGROUND
WORK COMPOUND
WESTERN POWER DISTRIBUTION
(BRECHFA FOREST CONNECTION)
ORDER
(REGULATION 5(2)(o))
A1
CAD
GENERIC LAYOUT FOR UNDERGROUND WORK COMPOUND
1:250
1:250 Metric
5m 0 5m 10m 15m 20m
KEY
1.All dimensions are in millimetres unless otherwise stated.
2.Dimensional information should not be obtained from this drawing (do not
scale).
3.Dimensions and depths are indicative only and will vary according to
installation and site conditions.
4.Proposed general arrangement based on WPD requirements.
5.Trench arrangement and dimensions to be confirmed during detail design
stages.
6.Minimum depth to top of cables to be 900mm in general installation, except in
agricultural land where the minimum is 1000mm.
7.Construction swathe width may vary according to site conditions.
5000mm 5000mm1000mm5000mm
PROPOSED TEMPORARY TRACK
PROPOSED WORKING AREAPROPOSED WORKING AREA
PROPOSED 132kV OPEN CUT
TRENCH ROUTE AREA
630mm
GROUND LEVEL
TRENCH TYPE 1
SECTION A-A
1:10
CABLE PLASTIC COVERS
WARNING TAPE
BACKFILL & REINSTATEMENT
TO HAUC GUIDELINES
160160
75
150
100
150
110mm O/D DUCT
EARTH TAPE (IF REQUIRED)
CBS BACKFILL TO
ENA TS 97-1
1200mm Cu
XLPE CABLE
100 O/D DUCT FOR
FIBRE OPTIC CABLE
160/150 PVC DUCTS
CLASS 1 750N CRUSH
STRENGTH
COVER REQUIREMENTS
FOOTWAY/VERGE = 800mm
CARRIAGEWAY = 900mm
AGRICULTURAL = 1225mm
75
630
110100
3x132kV XLPE cable
900mm min.
WARNING TAPE PROTECTIVE TILE
GROUND LEVEL
BACKFILL & REINSTATEMENT TO HAUC GUIDELINES
5000mm 5000mm1000mm5000mm
PROPOSED TEMPORARY TRACK
PROPOSED WORKING AREA
SUBSOIL
STOCKPILE
PROPOSED 132kV OPEN CUT
TRENCH ROUTE AREA
630mm
TOPSOIL STOCKPILE
GROUND LEVEL
APPLICATION No.
SCALE
ISSUE
TITLE:
ISSUE DATE COMMENTS CHK'D APP'DDRAWN
As Shown
ORIGINATOR DRAWINGNo.
COPYRIGHT NOT TO BE REPRODUCED WITHOUT THE WRITTEN PERMISSION OF WESTERN POWER DISTRIBUTION
Notes
PROJECTDRAWING No.
WESTERN POWER DISTRIBUTION (BRECHFA FOREST CONNECTION) ORDER
DESIGN DRAWINGS
(REGULATION 5(2)(o))
RB AFA
A
May 2015 FOR DCO SUBMISSION AJH
TMPRD-A1-007 EN020016
15/WPD/104
SHEET 7 OF 7
132kV UNDERGROUND CABLE INSTALLATION
TYPICAL DIRECT BURIED DETAILS AND
CONSTRUCTION SWATHE GENERAL
ARRANGEMENT
WESTERN POWER DISTRIBUTION
(BRECHFA FOREST CONNECTION)
ORDER
(REGULATION 5(2)(o))
A1
CAD
TYPICAL CARRIAGEWAY LONG SECTION VIEW OF 3x132kV XLPE CABLES
1:50
SECTION A-A
TYPICAL DUCT CROSS SECTION
1:50
2m1m01m
1:50 Metric
1:10 Metric
100mm0100mm 300mm 600mm
2m1m01m
1:50 Metric
2m1m01m
1:50 Metric
TYPICAL SECTION SWATHE
1:50
KEY